Geografic-Information-System/gui/wxpython/gmodeler/model.py

"""
@package gmodeler.model

@brief wxGUI Graphical Modeler (base classes & read/write)

Classes:
 - model::Model
 - model::ModelObject
 - model::ModelAction
 - model::ModelData
 - model::ModelRelation
 - model::ModelItem
 - model::ModelLoop
 - model::ModelCondition
 - model::ModelComment
 - model::ProcessModelFile
 - model::WriteModelFile
 - model::WritePythonFile
 - model::ModelParamDialog

(C) 2010-2016 by the GRASS Development Team

This program is free software under the GNU General Public License
(>=v2). Read the file COPYING that comes with GRASS for details.

@author Martin Landa <landa.martin gmail.com>
"""

import os
import getpass
import copy
import re
import mimetypes
import time
try:
    import xml.etree.ElementTree as etree
except ImportError:
    import elementtree.ElementTree as etree  # Python <= 2.4

import xml.sax.saxutils as saxutils

import wx
from wx.lib import ogl

from core import globalvar
from core import utils
from core.utils import _
from core.gcmd import GMessage, GException, GError, RunCommand, EncodeString, GWarning, GetDefaultEncoding
from core.settings import UserSettings
from gui_core.forms import GUI, CmdPanel
from gui_core.widgets import GNotebook
from gmodeler.giface import GraphicalModelerGrassInterface

from grass.script import core as grass
from grass.script import task as gtask


class Model(object):
    """Class representing the model"""

    def __init__(self, canvas=None):
        self.items = list()  # list of ordered items (action/loop/condition)

        # model properties
        self.properties = {
            'name': _("model"),
            'description': _("Script generated by wxGUI Graphical Modeler."),
            'author': getpass.getuser()}
        # model variables
        self.variables = dict()
        self.variablesParams = dict()

        self.canvas = canvas

    def GetCanvas(self):
        """Get canvas or None"""
        return self.canvas

    def GetItems(self, objType=None):
        """Get list of model items

        :param objType: Object type to filter model objects
        """
        if not objType:
            return self.items

        result = list()
        for item in self.items:
            if isinstance(item, objType):
                result.append(item)

        return result

    def GetItem(self, aId, objType=None):
        """Get item of given id

        :param aId: item id

        :return: Model* instance
        :return: None if no item found
        """
        ilist = self.GetItems(objType)
        for item in ilist:
            if item.GetId() == aId:
                return item

        return None

    def GetItemIndex(self, item):
        """Return list index of given item"""
        return self.items.index(item)

    def GetNumItems(self, actionOnly=False):
        """Get number of items"""
        if actionOnly:
            return len(self.GetItems(objType=ModelAction))

        return len(self.GetItems())

    def ReorderItems(self, idxList):
        items = list()
        for oldIdx, newIdx in idxList.iteritems():
            item = self.items.pop(oldIdx)
            items.append(item)
            self.items.insert(newIdx, item)
            # try:
            #     nextItem = self.items[newIdx+1]
            # except IndexError:
            #     continue # newIdx is the last item in the list
            # items.append(nextItem)
            # x = item.GetX()
            # y = item.GetY()
            # item.SetX(nextItem.GetX())
            # item.SetY(nextItem.GetY())
            # nextItem.SetX(x)
            # nextItem.SetY(y)

        dc = wx.ClientDC(self.canvas)
        for item in items:
            item.MoveLinks(dc)
            for mo in item.GetBlock():
                if isinstance(mo, ModelLoop):
                    self.canvas.parent.DefineLoop(mo)
                elif isinstance(mo, ModelCondition):
                    self.canvas.parent.DefineCondition(mo)

    def Normalize(self):
        # check for inconsistecies
        for idx in range(1, len(self.items)):
            if not self.items[idx].GetBlock() and \
                    isinstance(self.items[idx - 1], ModelLoop):
                # swap action not-in-block with previously defined
                # loop
                itemPrev = self.items[idx - 1]
                self.items[idx - 1] = self.items[idx]
                self.items[idx] = itemPrev

        # update ids
        iId = 1
        for item in self.items:
            item.SetId(iId)
            item.SetLabel()
            iId += 1

    def GetNextId(self):
        """Get next id (data ignored)

        :return: next id to be used (default: 1)
        """
        if len(self.items) < 1:
            return 1

        currId = self.items[-1].GetId()
        if currId > 0:
            return currId + 1

        return 1

    def GetProperties(self):
        """Get model properties"""
        return self.properties

    def GetVariables(self, params=False):
        """Get model variables"""
        if params:
            return self.variablesParams

        return self.variables

    def SetVariables(self, data):
        """Set model variables"""
        self.variables = data

    def Reset(self):
        """Reset model"""
        self.items = list()

    def RemoveItem(self, item, reference=None):
        """Remove item from model

        :item: item to be removed
        :reference: reference item valid for deletion

        :return: list of related items to remove/update
        """
        relList = list()
        upList = list()
        doRemove = True

        if isinstance(item, ModelAction):
            for rel in item.GetRelations():
                relList.append(rel)
                data = rel.GetData()
                if len(data.GetRelations()) < 2:
                    relList.append(data)
                else:
                    upList.append(data)

        elif isinstance(item, ModelData):
            for rel in item.GetRelations():
                otherItem = rel.GetTo() if rel.GetFrom() == item else rel.GetFrom()
                if reference and reference != otherItem:
                    doRemove = False
                    continue  # avoid recursive deletion
                relList.append(rel)
                if reference and reference != otherItem:
                    relList.append(otherItem)
            if not doRemove:
                upList.append(item)

        elif isinstance(item, ModelLoop):
            for rel in item.GetRelations():
                relList.append(rel)
            for action in self.GetItems():
                action.UnSetBlock(item)

        if doRemove and item in self.items:
            self.items.remove(item)

        return relList, upList

    def FindAction(self, aId):
        """Find action by id"""
        alist = self.GetItems(objType=ModelAction)
        for action in alist:
            if action.GetId() == aId:
                return action

        return None

    def GetMaps(self, prompt):
        """Get list of maps of selected type

        :param prompt: to filter maps"""
        maps = list()
        for data in self.GetData():
            if prompt == data.GetPrompt():
                mapName = data.GetValue()
                if not mapName or mapName[0] is '%':
                    continue  # skip variables
                maps.append(mapName)

        return maps

    def GetData(self):
        """Get list of data items"""
        result = list()
        dataItems = self.GetItems(objType=ModelData)

        for action in self.GetItems(objType=ModelAction):
            for rel in action.GetRelations():
                dataItem = rel.GetData()
                if dataItem not in result:
                    result.append(dataItem)
                if dataItem in dataItems:
                    dataItems.remove(dataItem)

        # standalone data
        if dataItems:
            result += dataItems

        return result

    def FindData(self, value, prompt):
        """Find data item in the model

        :param value: value
        :param prompt: prompt

        :return: ModelData instance
        :return: None if not found
        """
        for data in self.GetData():
            if data.GetValue() == value and \
                    data.GetPrompt() == prompt:
                return data

        return None

    def LoadModel(self, filename):
        """Load model definition stored in GRASS Model XML file (gxm)

        .. todo::
             Validate against DTD

        Raise exception on error.
        """
        dtdFilename = os.path.join(globalvar.WXGUIDIR, "xml", "grass-gxm.dtd")

        # parse workspace file
        try:
            gxmXml = ProcessModelFile(etree.parse(filename))
        except Exception as e:
            raise GException(unicode(e))

        if self.canvas:
            win = self.canvas.parent
            if gxmXml.pos:
                win.SetPosition(gxmXml.pos)
            if gxmXml.size:
                win.SetSize(gxmXml.size)

        # load properties
        self.properties = gxmXml.properties
        self.variables = gxmXml.variables

        # load actions
        for action in gxmXml.actions:
            actionItem = ModelAction(parent=self,
                                     x=action['pos'][0],
                                     y=action['pos'][1],
                                     width=action['size'][0],
                                     height=action['size'][1],
                                     task=action['task'],
                                     id=action['id'],
                                     label=action['label'],
                                     comment=action['comment'])

            if action['disabled']:
                actionItem.Enable(False)

            self.AddItem(actionItem, pos=actionItem.GetId() - 1)

            actionItem.SetValid(actionItem.GetTask().get_options())
            actionItem.GetLog()  # substitute variables (-> valid/invalid)

        # load data & relations
        for data in gxmXml.data:
            dataItem = ModelData(parent=self,
                                 x=data['pos'][0],
                                 y=data['pos'][1],
                                 width=data['size'][0],
                                 height=data['size'][1],
                                 prompt=data['prompt'],
                                 value=data['value'])
            dataItem.SetIntermediate(data['intermediate'])

            for rel in data['rels']:
                actionItem = self.FindAction(rel['id'])

                if rel['dir'] == 'from':
                    relation = ModelRelation(
                        parent=self,
                        fromShape=dataItem,
                        toShape=actionItem,
                        param=rel['name'])
                else:
                    relation = ModelRelation(
                        parent=self,
                        fromShape=actionItem,
                        toShape=dataItem,
                        param=rel['name'])
                relation.SetControlPoints(rel['points'])
                actionItem.AddRelation(relation)
                dataItem.AddRelation(relation)

            if self.canvas:
                dataItem.Update()

        # load loops
        for loop in gxmXml.loops:
            loopItem = ModelLoop(parent=self,
                                 x=loop['pos'][0],
                                 y=loop['pos'][1],
                                 width=loop['size'][0],
                                 height=loop['size'][1],
                                 label=loop['text'],
                                 id=loop['id'])
            self.AddItem(loopItem, pos=loopItem.GetId() - 1)

        # load conditions
        for condition in gxmXml.conditions:
            conditionItem = ModelCondition(parent=self,
                                           x=condition['pos'][0],
                                           y=condition['pos'][1],
                                           width=condition['size'][0],
                                           height=condition['size'][1],
                                           label=condition['text'],
                                           id=condition['id'])
            self.AddItem(conditionItem, pos=conditionItem.GetId() - 1)

        # define loops & if/else items
        for loop in gxmXml.loops:
            loopItem = self.GetItem(loop['id'], objType=ModelLoop)
            loopItem.SetItems(loop['items'])
            for idx in loop['items']:
                action = self.GetItem(idx, objType=ModelAction)
                action.SetBlock(loopItem)

        for condition in gxmXml.conditions:
            conditionItem = self.GetItem(condition['id'])
            for b in condition['items'].keys():
                alist = list()
                for aId in condition['items'][b]:
                    action = self.GetItem(aId)
                    alist.append(action)
                conditionItem.SetItems(alist, branch=b)

            items = conditionItem.GetItems()
            for b in items.keys():
                for action in items[b]:
                    action.SetBlock(conditionItem)

        # load comments
        for comment in gxmXml.comments:
            commentItem = ModelComment(parent=self,
                                       x=comment['pos'][0],
                                       y=comment['pos'][1],
                                       width=comment['size'][0],
                                       height=comment['size'][1],
                                       id=comment['id'],
                                       label=comment['text'])

            self.AddItem(commentItem, pos=commentItem.GetId() - 1)

    def AddItem(self, newItem, pos=-1):
        """Add item to the list"""
        if pos != -1:
            self.items.insert(pos, newItem)
        else:
            self.items.append(newItem)
        # i = 1
        # for item in self.items:
        #     item.SetId(i)
        #     i += 1

    def IsValid(self):
        """Return True if model is valid"""
        if self.Validate():
            return False

        return True

    def Validate(self):
        """Validate model, return None if model is valid otherwise
        error string"""
        errList = list()

        variables = self.GetVariables().keys()
        pattern = re.compile(r'(.*)(%.+\s?)(.*)')
        for action in self.GetItems(objType=ModelAction):
            cmd = action.GetLog(string=False)

            task = GUI(show=None).ParseCommand(cmd=cmd)
            errList += map(lambda x: cmd[0] + ': ' + x, task.get_cmd_error())

            # check also variables
            for opt in cmd[1:]:
                if '=' not in opt:
                    continue
                key, value = opt.split('=', 1)
                sval = pattern.search(value)
                if sval:
                    var = sval.group(2).strip()[1:]  # strip '%' from beginning
                    found = False
                    for v in variables:
                        if var.startswith(v):
                            found = True
                            break
                    if not found:
                        report = True
                        for item in filter(
                                lambda x: isinstance(x, ModelLoop),
                                action.GetBlock()):
                            if var in item.GetLabel():
                                report = False
                                break
                        if report:
                            errList.append(
                                cmd[0] +
                                ": " +
                                _("undefined variable '%s'") %
                                var)
            # TODO: check variables in file only optionally
            ### errList += self._substituteFile(action, checkOnly = True)

        return errList

    def _substituteFile(self, item, params=None, checkOnly=False):
        """Subsitute variables in command file inputs

        :param bool checkOnly: tuble - True to check variable, don't touch files

        :return: list of undefined variables
        """
        errList = list()

        self.fileInput = dict()

        # collect ascii inputs
        for p in item.GetParams()['params']:
            if p.get('element', '') == 'file' and \
                    p.get('prompt', '') == 'input' and \
                    p.get('age', '') == 'old':
                filename = p.get('value', p.get('default', ''))
                if filename and \
                        mimetypes.guess_type(filename)[0] == 'text/plain':
                    self.fileInput[filename] = None

        for finput in self.fileInput:
            # read lines
            fd = open(finput, "r")
            try:
                data = self.fileInput[finput] = fd.read()
            finally:
                fd.close()

            # substitute variables
            write = False
            variables = self.GetVariables()
            for variable in variables:
                pattern = re.compile('%' + variable)
                value = ''
                if params and 'variables' in params:
                    for p in params['variables']['params']:
                        if variable == p.get('name', ''):
                            if p.get('type', 'string') == 'string':
                                value = p.get('value', '')
                            else:
                                value = str(p.get('value', ''))
                            break

                if not value:
                    value = variables[variable].get('value', '')

                data = pattern.sub(value, data)
                if not checkOnly:
                    write = True

            pattern = re.compile(r'(.*)(%.+\s?)(.*)')
            sval = pattern.search(data)
            if sval:
                var = sval.group(2).strip()[1:]  # ignore '%'
                cmd = item.GetLog(string=False)[0]
                errList.append(cmd + ": " + _("undefined variable '%s'") % var)

            if not checkOnly:
                if write:
                    fd = open(finput, "w")
                    try:
                        fd.write(data)
                    finally:
                        fd.close()
                else:
                    self.fileInput[finput] = None

        return errList

    def OnPrepare(self, item, params):
        self._substituteFile(item, params, checkOnly=False)

    def RunAction(self, item, params, log, onDone,
                  onPrepare=None, statusbar=None):
        """Run given action

        :param item: action item
        :param params: parameters dict
        :param log: logging window
        :param onDone: on-done method
        :param onPrepare: on-prepare method
        :param statusbar: wx.StatusBar instance or None
        """
        name = '({0}) {1}'.format(item.GetId(), item.GetLabel())
        if name in params:
            paramsOrig = item.GetParams(dcopy=True)
            item.MergeParams(params[name])

        if statusbar:
            statusbar.SetStatusText(_('Running model...'), 0)

        data = {'item': item,
                'params': copy.deepcopy(params)}
        log.RunCmd(command=item.GetLog(string=False, substitute=params),
                   onDone=onDone, onPrepare=self.OnPrepare, userData=data)

        if name in params:
            item.SetParams(paramsOrig)

    def Run(self, log, onDone, parent=None):
        """Run model

        :param log: logging window (see gconsole.GConsole)
        :param onDone: on-done method
        :param parent: window for messages or None
        """
        if self.GetNumItems() < 1:
            GMessage(parent=parent,
                     message=_('Model is empty. Nothing to run.'))
            return

        statusbar = None
        if isinstance(parent, wx.Frame):
            statusbar = parent.GetStatusBar()

        # validation
        if statusbar:
            statusbar.SetStatusText(_('Validating model...'), 0)
        errList = self.Validate()
        if statusbar:
            statusbar.SetStatusText('', 0)
        if errList:
            dlg = wx.MessageDialog(
                parent=parent,
                message=_(
                    'Model is not valid. Do you want to '
                    'run the model anyway?\n\n%s') %
                '\n'.join(errList),
                caption=_("Run model?"),
                style=wx.YES_NO | wx.NO_DEFAULT | wx.ICON_QUESTION | wx.CENTRE)
            ret = dlg.ShowModal()
            dlg.Destroy()
            if ret != wx.ID_YES:
                return

        # parametrization
        params = self.Parameterize()
        delInterData = False
        if params:
            dlg = ModelParamDialog(parent=parent,
                                   model=self,
                                   params=params)
            dlg.CenterOnParent()

            ret = dlg.ShowModal()
            if ret != wx.ID_OK:
                dlg.Destroy()
                return

            err = dlg.GetErrors()
            delInterData = dlg.DeleteIntermediateData()
            dlg.Destroy()
            if err:
                GError(parent=parent, message=unicode('\n'.join(err)))
                return

            err = list()
            for key, item in params.iteritems():
                for p in item['params']:
                    if p.get('value', '') == '':
                        err.append(
                            (key, p.get(
                                'name', ''), p.get(
                                'description', '')))
            if err:
                GError(
                    parent=parent,
                    message=_("Variables below not defined:") +
                    "\n\n" +
                    unicode(
                        '\n'.join(
                            map(
                                lambda x: "%s: %s (%s)" %
                                (x[0],
                                 x[1],
                                    x[2]),
                                err))))
                return

        log.cmdThread.SetId(-1)
        for item in self.GetItems():
            if not item.IsEnabled():
                continue
            if isinstance(item, ModelAction):
                if item.GetBlockId():
                    continue
                self.RunAction(item, params, log, onDone)
            elif isinstance(item, ModelLoop):
                cond = item.GetLabel()

                # substitute variables in condition
                variables = self.GetVariables()
                for variable in variables:
                    pattern = re.compile('%' + variable)
                    if pattern.search(cond):
                        value = ''
                        if params and 'variables' in params:
                            for p in params['variables']['params']:
                                if variable == p.get('name', ''):
                                    value = p.get('value', '')
                                    break

                        if not value:
                            value = variables[variable].get('value', '')

                        if not value:
                            continue

                        vtype = variables[variable].get('type', 'string')
                        if vtype == 'string':
                            value = '"' + value + '"'
                        cond = pattern.sub(value, cond)

                # split condition
                # TODO: this part needs some better solution
                condVar, condText = map(
                    lambda x: x.strip(),
                    re.split('\s* in \s*', cond))
                pattern = re.compile('%' + condVar)
                # for vars()[condVar] in eval(condText): ?
                vlist = list()
                if condText[0] == '`' and condText[-1] == '`':
                    # run command
                    cmd, dcmd = gtask.cmdlist_to_tuple(
                        condText[1: -1].split(' '))
                    ret = RunCommand(cmd,
                                     read=True,
                                     **dcmd)
                    if ret:
                        vlist = ret.splitlines()
                else:
                    vlist = eval(condText)

                if 'variables' not in params:
                    params['variables'] = {'params': []}
                varDict = {'name': condVar, 'value': ''}
                params['variables']['params'].append(varDict)

                for var in vlist:
                    for action in item.GetItems(self.GetItems()):
                        if not action.IsEnabled():
                            continue

                        varDict['value'] = var

                        self.RunAction(item=action, params=params,
                                       log=log, onDone=onDone)
                params['variables']['params'].remove(varDict)

        if delInterData:
            self.DeleteIntermediateData(log)

        # discard values
        if params:
            for item in params.itervalues():
                for p in item['params']:
                    p['value'] = ''

    def DeleteIntermediateData(self, log):
        """Detele intermediate data"""
        rast, vect, rast3d, msg = self.GetIntermediateData()

        if rast:
            log.RunCmd(['g.remove', '-f', 'type=raster',
                        'name=%s' % ','.join(rast)])
        if rast3d:
            log.RunCmd(['g.remove', '-f', 'type=raster_3d',
                        'name=%s' % ','.join(rast3d)])
        if vect:
            log.RunCmd(['g.remove', '-f', 'type=vector',
                        'name=%s' % ','.join(vect)])

    def GetIntermediateData(self):
        """Get info about intermediate data"""
        rast = list()
        rast3d = list()
        vect = list()
        for data in self.GetData():
            if not data.IsIntermediate():
                continue
            name = data.GetValue()
            prompt = data.GetPrompt()
            if prompt == 'raster':
                rast.append(name)
            elif prompt == 'vector':
                vect.append(name)
            elif prompt == 'raster_3d':
                rast3d.append(name)

        msg = ''
        if rast:
            msg += '\n\n%s: ' % _('Raster maps')
            msg += ', '.join(rast)
        if rast3d:
            msg += '\n\n%s: ' % _('3D raster maps')
            msg += ', '.join(rast3d)
        if vect:
            msg += '\n\n%s: ' % _('Vector maps')
            msg += ', '.join(vect)

        return rast, vect, rast3d, msg

    def Update(self):
        """Update model"""
        for item in self.items:
            item.Update()

    def IsParameterized(self):
        """Return True if model is parameterized"""
        if self.Parameterize():
            return True

        return False

    def Parameterize(self):
        """Return parameterized options"""
        result = dict()
        idx = 0
        if self.variables:
            params = list()
            result["variables"] = {'flags': list(),
                                   'params': params,
                                   'idx': idx}
            for name, values in self.variables.iteritems():
                gtype = values.get('type', 'string')
                if gtype in ('raster', 'vector', 'mapset',
                             'file', 'region', 'dir'):
                    gisprompt = True
                    prompt = gtype
                    if gtype == 'raster':
                        element = 'cell'
                    else:
                        element = gtype
                    ptype = 'string'
                else:
                    gisprompt = False
                    prompt = None
                    element = None
                    ptype = gtype
                params.append({'gisprompt': gisprompt,
                               'multiple': False,
                               'description': values.get('description', ''),
                               'guidependency': '',
                               'default': '',
                               'age': None,
                               'required': True,
                               'value': values.get('value', ''),
                               'label': '',
                               'guisection': '',
                               'key_desc': '',
                               'values': list(),
                               'parameterized': False,
                               'values_desc': list(),
                               'prompt': prompt,
                               'element': element,
                               'type': ptype,
                               'name': name})

            idx += 1

        for action in self.GetItems(objType=ModelAction):
            if not action.IsEnabled():
                continue
            name = '({0}) {1}'.format(action.GetId(), action.GetLabel())
            params = action.GetParams()
            increment = False
            for f in params['flags']:
                if f.get('parameterized', False):
                    if name not in result:
                        increment = True
                        result[name] = {'flags': list(),
                                        'params': list(),
                                        'idx': idx}
                    result[name]['flags'].append(f)
            for p in params['params']:
                if p.get('parameterized', False):
                    if name not in result:
                        increment = True
                        result[name] = {'flags': list(),
                                        'params': list(),
                                        'idx': idx}
                    result[name]['params'].append(p)
            if increment:
                idx += 1

        self.variablesParams = result  # record parameters

        return result


class ModelObject(object):

    def __init__(self, id=-1, label=''):
        self.id = id     # internal id, should be not changed
        self.label = ''
        self.rels = list()  # list of ModelRelations

        self.isEnabled = True
        self.inBlock = list()  # list of related loops/conditions

    def __del__(self):
        pass

    def GetLabel(self):
        """Get label"""
        return self.label

    def SetLabel(self, label=''):
        """Set label"""
        self.label = label

    def GetId(self):
        """Get id"""
        return self.id

    def SetId(self, newId):
        """Set id"""
        if self.inBlock:
            for loop in self.inBlock:
                # update block item
                loop.UpdateItem(self.id, newId)

        self.id = newId

    def AddRelation(self, rel):
        """Record new relation
        """
        self.rels.append(rel)

    def GetRelations(self, fdir=None):
        """Get list of relations

        :param bool fdir: True for 'from'
        """
        if fdir is None:
            return self.rels

        result = list()
        for rel in self.rels:
            if fdir == 'from':
                if rel.GetFrom() == self:
                    result.append(rel)
            else:
                if rel.GetTo() == self:
                    result.append(rel)

        return result

    def IsEnabled(self):
        """Get True if action is enabled, otherwise False"""
        return self.isEnabled

    def Enable(self, enabled=True):
        """Enable/disable action"""
        self.isEnabled = enabled
        self.Update()

    def Update(self):
        pass

    def SetBlock(self, item):
        """Add object to the block (loop/condition)

        :param item: reference to ModelLoop or ModelCondition which
                     defines loops/condition
        """
        if item not in self.inBlock:
            self.inBlock.append(item)

    def UnSetBlock(self, item):
        """Remove object from the block (loop/consition)

        :param item: reference to ModelLoop or ModelCondition which
                     defines loops/codition
        """
        if item in self.inBlock:
            self.inBlock.remove(item)

    def GetBlock(self):
        """Get list of related ModelObject(s) which defines block
        (loop/condition)

        :return: list of ModelObjects
        """
        return self.inBlock

    def GetBlockId(self):
        """Get list of related ids which defines block

        :return: list of ids
        """
        ret = list()
        for mo in self.inBlock:
            ret.append(mo.GetId())

        return ret


class ModelAction(ModelObject, ogl.DividedShape):
    """Action class (GRASS module)"""

    def __init__(self, parent, x, y, id=-1, cmd=None, task=None,
                 width=None, height=None, label=None, comment=''):
        ModelObject.__init__(self, id, label)

        self.parent = parent
        self.task = task
        self.comment = comment

        if not width:
            width = UserSettings.Get(
                group='modeler', key='action', subkey=(
                    'size', 'width'))
        if not height:
            height = UserSettings.Get(
                group='modeler', key='action', subkey=(
                    'size', 'height'))

        if cmd:
            self.task = GUI(show=None).ParseCommand(cmd=cmd)
        else:
            if task:
                self.task = task
            else:
                self.task = None

        self.propWin = None

        self.data = list()   # list of connected data items

        self.isValid = False
        self.isParameterized = False

        if self.parent.GetCanvas():
            ogl.DividedShape.__init__(self, width, height)

            self.regionLabel = ogl.ShapeRegion()
            self.regionLabel.SetFormatMode(
                ogl.FORMAT_CENTRE_HORIZ | ogl.FORMAT_CENTRE_VERT)
            self.AddRegion(self.regionLabel)

            self.regionComment = None

            self.SetCanvas(self.parent)
            self.SetX(x)
            self.SetY(y)
            self._setPen()
            self._setBrush()
            self.SetLabel(label)
            if comment:
                self.SetComment(comment)

            self.SetRegionSizes()
            self.ReformatRegions()

        if self.task:
            self.SetValid(self.task.get_options())

    def _setBrush(self, running=False):
        """Set brush"""
        if running:
            color = UserSettings.Get(group='modeler', key='action',
                                     subkey=('color', 'running'))
        elif not self.isEnabled:
            color = UserSettings.Get(group='modeler', key='disabled',
                                     subkey='color')
        elif self.isValid:
            color = UserSettings.Get(group='modeler', key='action',
                                     subkey=('color', 'valid'))
        else:
            color = UserSettings.Get(group='modeler', key='action',
                                     subkey=('color', 'invalid'))

        wxColor = wx.Colour(color[0], color[1], color[2])
        self.SetBrush(wx.Brush(wxColor))

    def _setPen(self):
        """Set pen"""
        if self.isParameterized:
            width = int(UserSettings.Get(group='modeler', key='action',
                                         subkey=('width', 'parameterized')))
        else:
            width = int(UserSettings.Get(group='modeler', key='action',
                                         subkey=('width', 'default')))
        if self.isEnabled:
            style = wx.SOLID
        else:
            style = wx.DOT

        pen = wx.Pen(wx.BLACK, width, style)
        self.SetPen(pen)

    def ReformatRegions(self):
        rnum = 0
        canvas = self.parent.GetCanvas()

        dc = wx.ClientDC(canvas)  # used for measuring

        for region in self.GetRegions():
            text = region.GetText()
            self.FormatText(dc, text, rnum)
            rnum += 1

    def OnSizingEndDragLeft(self, pt, x, y, keys, attch):
        ogl.DividedShape.OnSizingEndDragLeft(self, pt, x, y, keys, attch)
        self.SetRegionSizes()
        self.ReformatRegions()
        self.GetCanvas().Refresh()

    def SetLabel(self, label=None):
        """Set label

        :param label: if None use command string instead
        """
        if label:
            self.label = label
        elif self.label:
            label = self.label
        else:
            try:
                label = self.task.get_cmd(ignoreErrors=True)[0]
            except:
                label = _("unknown")

        idx = self.GetId()
        self.regionLabel.SetText('(%d) %s' % (idx, label))
        self.SetRegionSizes()
        self.ReformatRegions()

    def SetComment(self, comment):
        """Set comment"""
        self.comment = comment

        if self.regionComment is None:
            self.regionComment = ogl.ShapeRegion()
            self.regionComment.SetFormatMode(ogl.FORMAT_CENTRE_HORIZ)
            font = wx.SystemSettings.GetFont(wx.SYS_DEFAULT_GUI_FONT)
            font.SetStyle(wx.ITALIC)
            self.regionComment.SetFont(font)

        # clear doesn't work
        # self.regionComment.ClearText()
        self.regionComment.SetText(comment)

        self.ClearRegions()
        self.AddRegion(self.regionLabel)
        self.regionLabel.SetProportions(0.0, 1.0)

        if self.comment:
            self.AddRegion(self.regionComment)
            self.regionLabel.SetProportions(0.0, 0.4)

        self.SetRegionSizes()
        self.ReformatRegions()

    def GetComment(self):
        """Get comment"""
        return self.comment

    def SetProperties(self, params, propwin):
        """Record properties dialog"""
        self.task.params = params['params']
        self.task.flags = params['flags']
        self.propWin = propwin

    def GetPropDialog(self):
        """Get properties dialog"""
        return self.propWin

    def GetLog(self, string=True, substitute=None):
        """Get logging info

        :param string: True to get cmd as a string otherwise a list
        :param substitute: dictionary of parameter to substitute or None
        """
        cmd = self.task.get_cmd(ignoreErrors=True, ignoreRequired=True,
                                ignoreDefault=False)

        # substitute variables
        if substitute:
            variables = []
            if 'variables' in substitute:
                for p in substitute['variables']['params']:
                    variables.append(p.get('name', ''))
            else:
                variables = self.parent.GetVariables()

            # order variables by length
            for variable in sorted(variables, key=len, reverse=True):
                pattern = re.compile('%' + variable)
                value = ''
                if substitute and 'variables' in substitute:
                    for p in substitute['variables']['params']:
                        if variable == p.get('name', ''):
                            if p.get('type', 'string') == 'string':
                                value = p.get('value', '')
                            else:
                                value = str(p.get('value', ''))
                            break

                if not value:
                    value = variables[variable].get('value', '')

                if not value:
                    continue

                for idx in range(len(cmd)):
                    if pattern.search(cmd[idx]):
                        cmd[idx] = pattern.sub(value, cmd[idx])
                    idx += 1

        if string:
            if cmd is None:
                return ''
            else:
                return ' '.join(cmd)

        return cmd

    def GetLabel(self):
        """Get name"""
        if self.label:
            return self.label

        cmd = self.task.get_cmd(ignoreErrors=True)
        if cmd and len(cmd) > 0:
            return cmd[0]

        return _('unknown')

    def GetParams(self, dcopy=False):
        """Get dictionary of parameters"""
        if dcopy:
            return copy.deepcopy(self.task.get_options())

        return self.task.get_options()

    def GetTask(self):
        """Get grassTask instance"""
        return self.task

    def SetParams(self, params):
        """Set dictionary of parameters"""
        self.task.params = params['params']
        self.task.flags = params['flags']

    def MergeParams(self, params):
        """Merge dictionary of parameters"""
        if 'flags' in params:
            for f in params['flags']:
                self.task.set_flag(f['name'],
                                   f.get('value', False))
        if 'params' in params:
            for p in params['params']:
                self.task.set_param(p['name'],
                                    p.get('value', ''))

    def SetValid(self, options):
        """Set validity for action

        :param options: dictionary with flags and params (gtask)
        """
        self.isValid = True

        for f in options['flags']:
            if f.get('parameterized', False):
                self.isParameterized = True
                break

        for p in options['params']:
            if self.isValid and p.get('required', False) and \
               p.get('value', '') == '' and \
               p.get('default', '') == '':
                self.isValid = False
            if not self.isParameterized and p.get('parameterized', False):
                self.isParameterized = True

        if self.parent.GetCanvas():
            self._setBrush()
            self._setPen()

    def IsValid(self):
        """Check validity (all required parameters set)"""
        return self.isValid

    def IsParameterized(self):
        """Check if action is parameterized"""
        return self.isParameterized

    def GetParameterizedParams(self):
        """Return parameterized flags and options"""
        param = {'flags': [], 'params': []}

        options = self.GetParams()

        for f in options['flags']:
            if f.get('parameterized', False):
                param['flags'].append(f)

        for p in options['params']:
            if p.get('parameterized', False):
                param['params'].append(p)

        return param

    def FindData(self, name):
        """Find data item by name"""
        for rel in self.GetRelations():
            data = rel.GetData()
            if name == rel.GetLabel() and name in data.GetLabel():
                return data

        return None

    def Update(self, running=False):
        """Update action"""
        if running:
            self._setBrush(running=True)
        else:
            self._setBrush()
        self._setPen()

    def OnDraw(self, dc):
        """Draw action in canvas"""
        self._setBrush()
        self._setPen()
        ogl.RectangleShape.Recentre(self, dc)  # re-center text
        ogl.RectangleShape.OnDraw(self, dc)


class ModelData(ModelObject, ogl.EllipseShape):

    def __init__(self, parent, x, y, value='',
                 prompt='', width=None, height=None):
        """Data item class

        :param parent: window parent
        :param x, y: position of the shape
        :param fname, tname: list of parameter names from / to
        :param value: value
        :param prompt: type of GIS element
        :param width, height: dimension of the shape
        """
        ModelObject.__init__(self)

        self.parent = parent
        self.value = value
        self.prompt = prompt
        self.intermediate = False
        self.propWin = None
        if not width:
            width = UserSettings.Get(
                group='modeler', key='data', subkey=(
                    'size', 'width'))
        if not height:
            height = UserSettings.Get(
                group='modeler', key='data', subkey=(
                    'size', 'height'))

        if self.parent.GetCanvas():
            ogl.EllipseShape.__init__(self, width, height)

            self.SetCanvas(self.parent)
            self.SetX(x)
            self.SetY(y)
            self._setPen()
            self._setBrush()
            self.SetLabel()

    def IsIntermediate(self):
        """Checks if data item is intermediate"""
        return self.intermediate

    def SetIntermediate(self, im):
        """Set intermediate flag"""
        self.intermediate = im

    def OnDraw(self, dc):
        self._setPen()

        ogl.EllipseShape.OnDraw(self, dc)

    def GetLog(self, string=True):
        """Get logging info"""
        name = list()
        for rel in self.GetRelations():
            name.append(rel.GetLabel())
        if name:
            return '/'.join(name) + '=' + self.value + ' (' + self.prompt + ')'
        else:
            return self.value + ' (' + self.prompt + ')'

    def GetLabel(self):
        """Get list of names"""
        name = list()
        for rel in self.GetRelations():
            name.append(rel.GetLabel())

        return name

    def GetPrompt(self):
        """Get prompt"""
        return self.prompt

    def SetPrompt(self, prompt):
        """Set prompt

        :param prompt:
        """
        self.prompt = prompt

    def GetValue(self):
        """Get value"""
        return self.value

    def SetValue(self, value):
        """Set value

        :param value:
        """
        self.value = value
        self.SetLabel()
        for direction in ('from', 'to'):
            for rel in self.GetRelations(direction):
                if direction == 'from':
                    action = rel.GetTo()
                else:
                    action = rel.GetFrom()

                task = GUI(
                    show=None).ParseCommand(
                    cmd=action.GetLog(
                        string=False))
                task.set_param(rel.GetLabel(), self.value)
                action.MergeParams(task.get_options())

    def GetPropDialog(self):
        """Get properties dialog"""
        return self.propWin

    def SetPropDialog(self, win):
        """Get properties dialog"""
        self.propWin = win

    def _setBrush(self):
        """Set brush"""
        if self.prompt == 'raster':
            color = UserSettings.Get(group='modeler', key='data',
                                     subkey=('color', 'raster'))
        elif self.prompt == 'raster_3d':
            color = UserSettings.Get(group='modeler', key='data',
                                     subkey=('color', 'raster3d'))
        elif self.prompt == 'vector':
            color = UserSettings.Get(group='modeler', key='data',
                                     subkey=('color', 'vector'))
        elif self.prompt == 'dbtable':
            color = UserSettings.Get(group='modeler', key='data',
                                     subkey=('color', 'dbtable'))
        else:
            color = UserSettings.Get(group='modeler', key='action',
                                     subkey=('color', 'invalid'))
        wxColor = wx.Colour(color[0], color[1], color[2])
        self.SetBrush(wx.Brush(wxColor))

    def _setPen(self):
        """Set pen"""
        isParameterized = False
        for rel in self.GetRelations('from'):
            if rel.GetTo().IsParameterized():
                isParameterized = True
                break
        if not isParameterized:
            for rel in self.GetRelations('to'):
                if rel.GetFrom().IsParameterized():
                    isParameterized = True
                    break

        if isParameterized:
            width = int(UserSettings.Get(group='modeler', key='action',
                                         subkey=('width', 'parameterized')))
        else:
            width = int(UserSettings.Get(group='modeler', key='action',
                                         subkey=('width', 'default')))
        if self.intermediate:
            style = wx.DOT
        else:
            style = wx.SOLID

        pen = wx.Pen(wx.BLACK, width, style)
        self.SetPen(pen)

    def SetLabel(self):
        """Update text"""
        self.ClearText()
        name = []
        for rel in self.GetRelations():
            name.append(rel.GetLabel())
        self.AddText('/'.join(name))
        if self.value:
            self.AddText(self.value)
        else:
            self.AddText(_('<not defined>'))

    def Update(self):
        """Update action"""
        self._setBrush()
        self._setPen()
        self.SetLabel()


class ModelRelation(ogl.LineShape):
    """Data - action relation"""

    def __init__(self, parent, fromShape, toShape, param=''):
        self.fromShape = fromShape
        self.toShape = toShape
        self.param = param
        self.parent = parent

        self._points = None

        if self.parent.GetCanvas():
            ogl.LineShape.__init__(self)

    def __del__(self):
        if self in self.fromShape.rels:
            self.fromShape.rels.remove(self)
        if self in self.toShape.rels:
            self.toShape.rels.remove(self)

    def GetFrom(self):
        """Get id of 'from' shape"""
        return self.fromShape

    def GetTo(self):
        """Get id of 'to' shape"""
        return self.toShape

    def GetData(self):
        """Get related ModelData instance

        :return: ModelData instance
        :return: None if not found
        """
        if isinstance(self.fromShape, ModelData):
            return self.fromShape
        elif isinstance(self.toShape, ModelData):
            return self.toShape

        return None

    def GetLabel(self):
        """Get parameter name"""
        return self.param

    def ResetShapes(self):
        """Reset related objects"""
        self.fromShape.ResetControlPoints()
        self.toShape.ResetControlPoints()
        self.ResetControlPoints()

    def SetControlPoints(self, points):
        """Set control points"""
        self._points = points

    def GetControlPoints(self):
        """Get list of control points"""
        return self._points

    def _setPen(self):
        """Set pen"""
        pen = wx.Pen(wx.BLACK, 1, wx.SOLID)
        self.SetPen(pen)

    def OnDraw(self, dc):
        """Draw relation"""
        self._setPen()
        ogl.LineShape.OnDraw(self, dc)

    def SetName(self, param):
        self.param = param


class ModelItem(ModelObject):

    def __init__(self, parent, x, y, id=-1, width=None,
                 height=None, label='', items=[]):
        """Abstract class for loops and conditions"""
        ModelObject.__init__(self, id, label)
        self.parent = parent

    def _setPen(self):
        """Set pen"""
        if self.isEnabled:
            style = wx.SOLID
        else:
            style = wx.DOT

        pen = wx.Pen(wx.BLACK, 1, style)
        self.SetPen(pen)

    def SetId(self, id):
        """Set loop id"""
        self.id = id

    def SetLabel(self, label=''):
        """Set loop text (condition)"""
        if label:
            self.label = label
        self.ClearText()
        self.AddText('(' + str(self.id) + ') ' + self.label)

    def GetLog(self):
        """Get log info"""
        if self.label:
            return _("Condition: ") + self.label
        else:
            return _("Condition: not defined")

    def AddRelation(self, rel):
        """Record relation"""
        self.rels.append(rel)

    def Clear(self):
        """Clear object, remove rels"""
        self.rels = list()


class ModelLoop(ModelItem, ogl.RectangleShape):

    def __init__(self, parent, x, y, id=-1, idx=-1,
                 width=None, height=None, label='', items=[]):
        """Defines a loop"""
        ModelItem.__init__(self, parent, x, y, id, width, height, label, items)
        self.itemIds = list()  # unordered

        if not width:
            width = UserSettings.Get(
                group='modeler', key='loop', subkey=(
                    'size', 'width'))
        if not height:
            height = UserSettings.Get(
                group='modeler', key='loop', subkey=(
                    'size', 'height'))

        if self.parent.GetCanvas():
            ogl.RectangleShape.__init__(self, width, height)

            self.SetCanvas(self.parent)
            self.SetX(x)
            self.SetY(y)
            self._setPen()
            self._setBrush()
            self.SetCornerRadius(100)
            self.SetLabel(label)

    def _setBrush(self):
        """Set brush"""
        if not self.isEnabled:
            color = UserSettings.Get(group='modeler', key='disabled',
                                     subkey='color')
        else:
            color = UserSettings.Get(group='modeler', key='loop',
                                     subkey=('color', 'valid'))

        wxColor = wx.Colour(color[0], color[1], color[2])
        self.SetBrush(wx.Brush(wxColor))

    def Enable(self, enabled=True):
        """Enable/disable action"""
        for idx in self.itemIds:
            item = self.parent.FindAction(idx)
            if item:
                item.Enable(enabled)

        ModelObject.Enable(self, enabled)
        self.Update()

    def Update(self):
        self._setPen()
        self._setBrush()

    def GetItems(self, items):
        """Get sorted items by id"""
        result = list()
        for item in items:
            if item.GetId() in self.itemIds:
                result.append(item)

        return result

    def SetItems(self, items):
        """Set items (id)"""
        self.itemIds = items

    def UpdateItem(self, oldId, newId):
        """Update item in the list"""
        idx = self.itemIds.index(oldId)
        if idx != -1:
            self.itemIds[idx] = newId

    def OnDraw(self, dc):
        """Draw loop in canvas"""
        self._setBrush()
        ogl.RectangleShape.Recentre(self, dc)  # re-center text
        ogl.RectangleShape.OnDraw(self, dc)


class ModelCondition(ModelItem, ogl.PolygonShape):

    def __init__(self, parent, x, y, id=-1, width=None, height=None, label='',
                 items={'if': [], 'else': []}):
        """Defines a if-else condition"""
        ModelItem.__init__(self, parent, x, y, id, width, height, label, items)
        self.itemIds = {'if': [], 'else': []}

        if not width:
            self.width = UserSettings.Get(
                group='modeler',
                key='if-else',
                subkey=(
                    'size',
                    'width'))
        else:
            self.width = width
        if not height:
            self.height = UserSettings.Get(
                group='modeler',
                key='if-else',
                subkey=(
                    'size',
                    'height'))
        else:
            self.height = height

        if self.parent.GetCanvas():
            ogl.PolygonShape.__init__(self)

            points = [(0, - self.height / 2),
                      (self.width / 2, 0),
                      (0, self.height / 2),
                      (- self.width / 2, 0)]
            self.Create(points)

            self.SetCanvas(self.parent)
            self.SetX(x)
            self.SetY(y)
            self.SetPen(wx.BLACK_PEN)
            if label:
                self.AddText('(' + str(self.id) + ') ' + label)
            else:
                self.AddText('(' + str(self.id) + ')')

    def GetLabel(self):
        """Get name"""
        return _("if-else")

    def GetWidth(self):
        """Get object width"""
        return self.width

    def GetHeight(self):
        """Get object height"""
        return self.height

    def GetItems(self, items):
        """Get sorted items by id"""
        result = {'if': [], 'else': []}
        for item in items:
            if item.GetId() in self.itemIds['if']:
                result['if'].append(item)
            elif item.GetId() in self.itemIds['else']:
                result['else'].append(item)

        return result

    def SetItems(self, items, branch='if'):
        """Set items (id)

        :param items: list of items
        :param branch: 'if' / 'else'
        """
        if branch in ['if', 'else']:
            self.itemIds[branch] = items


class ModelComment(ModelObject, ogl.RectangleShape):

    def __init__(self, parent, x, y, id=-1, width=None, height=None, label=''):
        """Defines a model comment"""
        ModelObject.__init__(self, id, label)

        if not width:
            width = UserSettings.Get(
                group='modeler', key='comment', subkey=(
                    'size', 'width'))
        if not height:
            height = UserSettings.Get(
                group='modeler', key='comment', subkey=(
                    'size', 'height'))

        if parent.GetCanvas():
            ogl.RectangleShape.__init__(self, width, height)
            self.SetCanvas(parent)
            self.SetX(x)
            self.SetY(y)
            font = wx.SystemSettings.GetFont(wx.SYS_DEFAULT_GUI_FONT)
            font.SetStyle(wx.ITALIC)
            self.SetFont(font)
            self._setPen()
            self._setBrush()
            self.SetLabel(label)

    def _setBrush(self, running=False):
        """Set brush"""
        color = UserSettings.Get(group='modeler', key='comment',
                                 subkey='color')
        wxColor = wx.Colour(color[0], color[1], color[2])
        self.SetBrush(wx.Brush(wxColor))

    def _setPen(self):
        """Set pen"""
        pen = wx.Pen(wx.BLACK, 1, wx.DOT)
        self.SetPen(pen)

    def SetLabel(self, label=None):
        """Set label

        :param label: if None use command string instead
        """
        if label:
            self.label = label
        elif self.label:
            label = self.label
        else:
            label = ''
        idx = self.GetId()

        self.ClearText()
        self.AddText('(%d) %s' % (idx, label))

    def GetComment(self):
        return self.GetLabel()

    def SetComment(self, comment):
        self.SetLabel(comment)
        self.GetCanvas().Refresh()


class ProcessModelFile:
    """Process GRASS model file (gxm)"""

    def __init__(self, tree):
        """A ElementTree handler for the GXM XML file, as defined in
        grass-gxm.dtd.
        """
        self.tree = tree
        self.root = self.tree.getroot()
        # check if input is a valid GXM file
        if self.root is None or self.root.tag != 'gxm':
            if self.root is not None:
                tagName = self.root.tag
            else:
                tabName = _("empty")
            raise GException(
                _("Details: unsupported tag name '{}'.").format(tagName))

        # list of actions, data
        self.properties = dict()
        self.variables = dict()
        self.actions = list()
        self.data = list()
        self.loops = list()
        self.conditions = list()
        self.comments = list()

        self._processWindow()
        self._processProperties()
        self._processVariables()
        self._processItems()
        self._processData()

    def _filterValue(self, value):
        """Filter value

        :param value:
        """
        value = value.replace('&lt;', '<')
        value = value.replace('&gt;', '>')

        return value

    def _getNodeText(self, node, tag, default=''):
        """Get node text"""
        p = node.find(tag)
        if p is not None:
            if p.text:
                return utils.normalize_whitespace(p.text)
            else:
                return ''

        return default

    def _processWindow(self):
        """Process window properties"""
        node = self.root.find('window')
        if node is None:
            self.pos = self.size = None
            return

        self.pos, self.size = self._getDim(node)

    def _processProperties(self):
        """Process model properties"""
        node = self.root.find('properties')
        if node is None:
            return
        for key in ('name', 'description', 'author'):
            self._processProperty(node, key)

        for f in node.findall('flag'):
            name = f.get('name', '')
            if name == 'overwrite':
                self.properties['overwrite'] = True

    def _processProperty(self, pnode, name):
        """Process given property"""
        node = pnode.find(name)
        if node is not None:
            self.properties[name] = node.text
        else:
            self.properties[name] = ''

    def _processVariables(self):
        """Process model variables"""
        vnode = self.root.find('variables')
        if vnode is None:
            return
        for node in vnode.findall('variable'):
            name = node.get('name', '')
            if not name:
                continue  # should not happen
            self.variables[name] = {'type': node.get('type', 'string')}
            for key in ('description', 'value'):
                self._processVariable(node, name, key)

    def _processVariable(self, pnode, name, key):
        """Process given variable"""
        node = pnode.find(key)
        if node is not None:
            if node.text:
                self.variables[name][key] = node.text

    def _processItems(self):
        """Process model items (actions, loops, conditions)"""
        self._processActions()
        self._processLoops()
        self._processConditions()
        self._processComments()

    def _processActions(self):
        """Process model file"""
        for action in self.root.findall('action'):
            pos, size = self._getDim(action)
            disabled = False

            task = action.find('task')
            if task is not None:
                if task.find('disabled') is not None:
                    disabled = True
                task = self._processTask(task)
            else:
                task = None

            aId = int(action.get('id', -1))
            label = action.get('name')
            comment = action.find('comment')
            if comment is not None:
                commentString = comment.text
            else:
                commentString = ''

            self.actions.append({'pos': pos,
                                 'size': size,
                                 'task': task,
                                 'id': aId,
                                 'disabled': disabled,
                                 'label': label,
                                 'comment': commentString})

    def _getDim(self, node):
        """Get position and size of shape"""
        pos = size = None
        posAttr = node.get('pos', None)
        if posAttr:
            posVal = map(int, posAttr.split(','))
            try:
                pos = (posVal[0], posVal[1])
            except:
                pos = None

        sizeAttr = node.get('size', None)
        if sizeAttr:
            sizeVal = map(int, sizeAttr.split(','))
            try:
                size = (sizeVal[0], sizeVal[1])
            except:
                size = None

        return pos, size

    def _processData(self):
        """Process model file"""
        for data in self.root.findall('data'):
            pos, size = self._getDim(data)
            param = data.find('data-parameter')
            prompt = value = None
            if param is not None:
                prompt = param.get('prompt', None)
                value = self._filterValue(self._getNodeText(param, 'value'))

            if data.find('intermediate') is None:
                intermediate = False
            else:
                intermediate = True

            rels = list()
            for rel in data.findall('relation'):
                defrel = {'id': int(rel.get('id', -1)),
                          'dir': rel.get('dir', 'to'),
                          'name': rel.get('name', '')}
                points = list()
                for point in rel.findall('point'):
                    x = self._filterValue(self._getNodeText(point, 'x'))
                    y = self._filterValue(self._getNodeText(point, 'y'))
                    points.append((float(x), float(y)))
                defrel['points'] = points
                rels.append(defrel)

            self.data.append({'pos': pos,
                              'size': size,
                              'prompt': prompt,
                              'value': value,
                              'intermediate': intermediate,
                              'rels': rels})

    def _processTask(self, node):
        """Process task

        :return: grassTask instance
        :return: None on error
        """
        cmd = list()
        parameterized = list()

        name = node.get('name', None)
        if not name:
            return None

        cmd.append(name)

        # flags
        for f in node.findall('flag'):
            flag = f.get('name', '')
            if f.get('parameterized', '0') == '1':
                parameterized.append(('flag', flag))
                if f.get('value', '1') == '0':
                    continue
            if len(flag) > 1:
                cmd.append('--' + flag)
            else:
                cmd.append('-' + flag)
        # parameters
        for p in node.findall('parameter'):
            name = p.get('name', '')
            if p.find('parameterized') is not None:
                parameterized.append(('param', name))
            cmd.append(
                '%s=%s' %
                (name, self._filterValue(
                    self._getNodeText(
                        p, 'value'))))

        task, err = GUI(show=None, checkError=True).ParseCommand(cmd=cmd)
        if err:
            GWarning(os.linesep.join(err))

        for opt, name in parameterized:
            if opt == 'flag':
                task.set_flag(name, True, element='parameterized')
            else:
                task.set_param(name, True, element='parameterized')

        return task

    def _processLoops(self):
        """Process model loops"""
        for node in self.root.findall('loop'):
            pos, size = self._getDim(node)
            text = self._filterValue(
                self._getNodeText(
                    node, 'condition')).strip()
            aid = list()
            for anode in node.findall('item'):
                try:
                    aid.append(int(anode.text))
                except ValueError:
                    pass

            self.loops.append({'pos': pos,
                               'size': size,
                               'text': text,
                               'id': int(node.get('id', -1)),
                               'items': aid})

    def _processConditions(self):
        """Process model conditions"""
        for node in self.root.findall('if-else'):
            pos, size = self._getDim(node)
            text = self._filterValue(
                self._getNodeText(
                    node, 'condition')).strip()
            aid = {'if': list(),
                   'else': list()}
            for b in aid.keys():
                bnode = node.find(b)
                if bnode is None:
                    continue
                for anode in bnode.findall('item'):
                    try:
                        aid[b].append(int(anode.text))
                    except ValueError:
                        pass

            self.conditions.append({'pos': pos,
                                    'size': size,
                                    'text': text,
                                    'id': int(node.get('id', -1)),
                                    'items': aid})

    def _processComments(self):
        """Process model comments"""
        for node in self.root.findall('comment'):
            pos, size = self._getDim(node)
            text = self._filterValue(node.text)

            self.comments.append({'pos': pos,
                                  'size': size,
                                  'text': text,
                                  'id': int(node.get('id', -1)),
                                  'text': text})


class WriteModelFile:
    """Generic class for writing model file"""

    def __init__(self, fd, model):
        self.fd = fd
        self.model = model
        self.properties = model.GetProperties()
        self.variables = model.GetVariables()
        self.items = model.GetItems()

        self.indent = 0

        self._header()

        self._window()
        self._properties()
        self._variables()
        self._items()

        dataList = list()
        for action in model.GetItems(objType=ModelAction):
            for rel in action.GetRelations():
                dataItem = rel.GetData()
                if dataItem not in dataList:
                    dataList.append(dataItem)
        self._data(dataList)

        self._footer()

    def _filterValue(self, value):
        """Escapes value to be stored in XML.

        :param value: string to be escaped as XML
        :return: a XML-valid string
        """
        value = saxutils.escape(value)
        return value

    def _header(self):
        """Write header"""
        self.fd.write(
            '<?xml version="1.0" encoding="%s"?>\n' %
            GetDefaultEncoding(
                forceUTF8=True))
        self.fd.write('<!DOCTYPE gxm SYSTEM "grass-gxm.dtd">\n')
        self.fd.write('%s<gxm>\n' % (' ' * self.indent))
        self.indent += 4

    def _footer(self):
        """Write footer"""
        self.indent -= 4
        self.fd.write('%s</gxm>\n' % (' ' * self.indent))

    def _window(self):
        """Write window properties"""
        canvas = self.model.GetCanvas()
        if canvas is None:
            return
        win = canvas.parent
        pos = win.GetPosition()
        size = win.GetSize()
        self.fd.write('%s<window pos="%d,%d" size="%d,%d" />\n' %
                      (' ' * self.indent, pos[0], pos[1], size[0], size[1]))

    def _properties(self):
        """Write model properties"""
        self.fd.write('%s<properties>\n' % (' ' * self.indent))
        self.indent += 4
        if self.properties['name']:
            self.fd.write(
                '%s<name>%s</name>\n' %
                (' ' *
                 self.indent,
                 EncodeString(
                     self.properties['name'])))
        if self.properties['description']:
            self.fd.write(
                '%s<description>%s</description>\n' %
                (' ' *
                 self.indent,
                 EncodeString(
                     self.properties['description'])))
        if self.properties['author']:
            self.fd.write(
                '%s<author>%s</author>\n' %
                (' ' *
                 self.indent,
                 EncodeString(
                     self.properties['author'])))

        if 'overwrite' in self.properties and \
                self.properties['overwrite']:
            self.fd.write(
                '%s<flag name="overwrite" />\n' %
                (' ' * self.indent))
        self.indent -= 4
        self.fd.write('%s</properties>\n' % (' ' * self.indent))

    def _variables(self):
        """Write model variables"""
        if not self.variables:
            return
        self.fd.write('%s<variables>\n' % (' ' * self.indent))
        self.indent += 4
        for name, values in self.variables.iteritems():
            self.fd.write(
                '%s<variable name="%s" type="%s">\n' %
                (' ' * self.indent, EncodeString(name), values['type']))
            self.indent += 4
            if 'value' in values:
                self.fd.write('%s<value>%s</value>\n' %
                              (' ' * self.indent, EncodeString(values['value'])))
            if 'description' in values:
                self.fd.write(
                    '%s<description>%s</description>\n' %
                    (' ' * self.indent, EncodeString(values['description'])))
            self.indent -= 4
            self.fd.write('%s</variable>\n' % (' ' * self.indent))
        self.indent -= 4
        self.fd.write('%s</variables>\n' % (' ' * self.indent))

    def _items(self):
        """Write actions/loops/conditions"""
        for item in self.items:
            if isinstance(item, ModelAction):
                self._action(item)
            elif isinstance(item, ModelLoop):
                self._loop(item)
            elif isinstance(item, ModelCondition):
                self._condition(item)
            elif isinstance(item, ModelComment):
                self._comment(item)

    def _action(self, action):
        """Write actions"""
        self.fd.write(
            '%s<action id="%d" name="%s" pos="%d,%d" size="%d,%d">\n' %
            (' ' *
             self.indent,
             action.GetId(),
             EncodeString(
                 action.GetLabel()),
                action.GetX(),
                action.GetY(),
                action.GetWidth(),
                action.GetHeight()))
        self.indent += 4
        comment = action.GetComment()
        if comment:
            self.fd.write(
                '%s<comment>%s</comment>\n' %
                (' ' * self.indent, EncodeString(comment)))
        self.fd.write('%s<task name="%s">\n' %
                      (' ' * self.indent, action.GetLog(string=False)[0]))
        self.indent += 4
        if not action.IsEnabled():
            self.fd.write('%s<disabled />\n' % (' ' * self.indent))
        for key, val in action.GetParams().iteritems():
            if key == 'flags':
                for f in val:
                    if f.get('value', False) or f.get('parameterized', False):
                        if f.get('parameterized', False):
                            if f.get('value', False) == False:
                                self.fd.write(
                                    '%s<flag name="%s" value="0" parameterized="1" />\n' %
                                    (' ' *
                                     self.indent,
                                     f.get(
                                         'name',
                                         '')))
                            else:
                                self.fd.write(
                                    '%s<flag name="%s" parameterized="1" />\n' %
                                    (' ' *
                                     self.indent,
                                     f.get(
                                         'name',
                                         '')))
                        else:
                            self.fd.write(
                                '%s<flag name="%s" />\n' %
                                (' ' * self.indent, f.get('name', '')))
            else:  # parameter
                for p in val:
                    if not p.get(
                            'value', '') and not p.get(
                            'parameterized', False):
                        continue
                    self.fd.write('%s<parameter name="%s">\n' %
                                  (' ' * self.indent, p.get('name', '')))
                    self.indent += 4
                    if p.get('parameterized', False):
                        self.fd.write(
                            '%s<parameterized />\n' %
                            (' ' * self.indent))
                    self.fd.write(
                        '%s<value>%s</value>\n' %
                        (' ' *
                         self.indent,
                         self._filterValue(
                             p.get(
                                 'value',
                                 ''))))
                    self.indent -= 4
                    self.fd.write('%s</parameter>\n' % (' ' * self.indent))
        self.indent -= 4
        self.fd.write('%s</task>\n' % (' ' * self.indent))
        self.indent -= 4
        self.fd.write('%s</action>\n' % (' ' * self.indent))

    def _data(self, dataList):
        """Write data"""
        for data in dataList:
            self.fd.write('%s<data pos="%d,%d" size="%d,%d">\n' %
                          (' ' * self.indent, data.GetX(), data.GetY(),
                           data.GetWidth(), data.GetHeight()))
            self.indent += 4
            self.fd.write('%s<data-parameter prompt="%s">\n' %
                          (' ' * self.indent, data.GetPrompt()))
            self.indent += 4
            self.fd.write(
                '%s<value>%s</value>\n' %
                (' ' *
                 self.indent,
                 self._filterValue(
                     data.GetValue())))
            self.indent -= 4
            self.fd.write('%s</data-parameter>\n' % (' ' * self.indent))

            if data.IsIntermediate():
                self.fd.write('%s<intermediate />\n' % (' ' * self.indent))

            # relations
            for ft in ('from', 'to'):
                for rel in data.GetRelations(ft):
                    if ft == 'from':
                        aid = rel.GetTo().GetId()
                    else:
                        aid = rel.GetFrom().GetId()
                    self.fd.write('%s<relation dir="%s" id="%d" name="%s">\n' %
                                  (' ' * self.indent, ft, aid, rel.GetLabel()))
                    self.indent += 4
                    for point in rel.GetLineControlPoints()[1:-1]:
                        self.fd.write('%s<point>\n' % (' ' * self.indent))
                        self.indent += 4
                        x, y = point.Get()
                        self.fd.write(
                            '%s<x>%d</x>\n' %
                            (' ' * self.indent, int(x)))
                        self.fd.write(
                            '%s<y>%d</y>\n' %
                            (' ' * self.indent, int(y)))
                        self.indent -= 4
                        self.fd.write('%s</point>\n' % (' ' * self.indent))
                    self.indent -= 4
                    self.fd.write('%s</relation>\n' % (' ' * self.indent))

            self.indent -= 4
            self.fd.write('%s</data>\n' % (' ' * self.indent))

    def _loop(self, loop):
        """Write loops"""
        self.fd.write(
            '%s<loop id="%d" pos="%d,%d" size="%d,%d">\n' %
            (' ' *
             self.indent,
             loop.GetId(),
             loop.GetX(),
             loop.GetY(),
             loop.GetWidth(),
             loop.GetHeight()))
        self.indent += 4
        cond = loop.GetLabel()
        if cond:
            self.fd.write('%s<condition>%s</condition>\n' %
                          (' ' * self.indent, self._filterValue(cond)))
        for item in loop.GetItems(self.model.GetItems(objType=ModelAction)):
            self.fd.write('%s<item>%d</item>\n' %
                          (' ' * self.indent, item.GetId()))
        self.indent -= 4
        self.fd.write('%s</loop>\n' % (' ' * self.indent))

    def _condition(self, condition):
        """Write conditions"""
        bbox = condition.GetBoundingBoxMin()
        self.fd.write(
            '%s<if-else id="%d" pos="%d,%d" size="%d,%d">\n' %
            (' ' *
             self.indent,
             condition.GetId(),
             condition.GetX(),
             condition.GetY(),
             bbox[0],
                bbox[1]))
        text = condition.GetLabel()
        self.indent += 4
        if text:
            self.fd.write('%s<condition>%s</condition>\n' %
                          (' ' * self.indent, self._filterValue(text)))
        items = condition.GetItems()
        for b in items.keys():
            if len(items[b]) < 1:
                continue
            self.fd.write('%s<%s>\n' % (' ' * self.indent, b))
            self.indent += 4
            for item in items[b]:
                self.fd.write('%s<item>%d</item>\n' %
                              (' ' * self.indent, item.GetId()))
            self.indent -= 4
            self.fd.write('%s</%s>\n' % (' ' * self.indent, b))

        self.indent -= 4
        self.fd.write('%s</if-else>\n' % (' ' * self.indent))

    def _comment(self, comment):
        """Write comment"""
        self.fd.write(
            '%s<comment id="%d" pos="%d,%d" size="%d,%d">%s</comment>\n' %
            (' ' *
             self.indent,
             comment.GetId(),
             comment.GetX(),
             comment.GetY(),
             comment.GetWidth(),
             comment.GetHeight(),
             EncodeString(
                 comment.GetLabel())))


class WritePythonFile:

    def __init__(self, fd, model):
        """Class for exporting model to Python script

        :param fd: file descriptor
        """
        self.fd = fd
        self.model = model
        self.indent = 4

        self._writePython()

    def _getStandardizedOption(self, string):
        if string == 'raster':
            return 'G_OPT_R_MAP'
        elif string == 'vector':
            return 'G_OPT_V_MAP'
        elif string == 'mapset':
            return 'G_OPT_M_MAPSET'
        elif string == 'file':
            return 'G_OPT_F_INPUT'
        elif string == 'dir':
            return 'G_OPT_M_DIR'
        elif string == 'region':
            return 'G_OPT_M_REGION'

        return ''

    def _writePython(self):
        """Write model to file"""
        properties = self.model.GetProperties()

        # header
        self.fd.write(
            r"""#!/usr/bin/env python
#
#%s
#
# MODULE:       %s
#
# AUTHOR(S):    %s
#
# PURPOSE:      %s
#
# DATE:         %s
#
#%s
""" %
            ('#' *
             77,
             EncodeString(
                 properties['name']),
                EncodeString(
                 properties['author']),
                EncodeString(
                 '\n# '.join(
                     properties['description'].splitlines())),
                time.asctime(),
                '#' *
                77))

        # UI
        self.fd.write(
            r"""
#%%module
#%% description: %s
#%%end
""" % (EncodeString(' '.join(properties['description'].splitlines()))))

        variables = self.model.GetVariables()
        for key, data in variables.iteritems():
            otype = self._getStandardizedOption(data['type'])
            self.fd.write(
                r"""
#%%option %s
#%% key: %s
#%% description: %s
#%% required: yes
""" % (otype, key, data['description']))
            if 'value' in data:
                self.fd.write("#%% answer: %s\n" % data['value'])
            self.fd.write("#% end\n")

        # import modules
        self.fd.write(
            r"""
import sys
import os
import atexit

from grass.script import parser, run_command
""")

        # cleanup()
        rast, vect, rast3d, msg = self.model.GetIntermediateData()
        self.fd.write(
            r"""
def cleanup():
""")
        if rast:
            self.fd.write(
                r"""  run_command('g.remove', flags='f', type='raster',
                      name=%s)
""" % ','.join(map(lambda x: "'" + x + "'", rast)))
        if vect:
            self.fd.write(
                r"""  run_command('g.remove', flags='f', type='vector',
                      name=%s)
""" % ','.join(map(lambda x: "'" + x + "'", vect)))
        if rast3d:
            self.fd.write(
                r"""  run_command('g.remove', flags='f', type='raster_3d',
                      name=%s)
""" % ','.join(map(lambda x: "'" + x + "'", rast3d)))
        if not rast and not vect and not rast3d:
            self.fd.write('    pass\n')

        self.fd.write("\ndef main():\n")
        for item in self.model.GetItems():
            self._writePythonItem(item, variables=self.model.GetVariables())

        self.fd.write("\n    return 0\n")

        self.fd.write(
            r"""
if __name__ == "__main__":
    options, flags = parser()
    atexit.register(cleanup)
    sys.exit(main())
""")

    def _writePythonItem(self, item, ignoreBlock=True, variables={}):
        """Write model object to Python file"""
        if isinstance(item, ModelAction):
            if ignoreBlock and item.GetBlockId():  # ignore items in loops of conditions
                return
            self._writePythonAction(item, variables=variables)
        elif isinstance(item, ModelLoop) or isinstance(item, ModelCondition):
            # substitute condition
            cond = item.GetLabel()
            for variable in self.model.GetVariables():
                pattern = re.compile('%' + variable)
                if pattern.search(cond):
                    value = variables[variable].get('value', '')
                    if variables[variable].get('type', 'string') == 'string':
                        value = '"' + value + '"'
                    cond = pattern.sub(value, cond)
            if isinstance(item, ModelLoop):
                condVar, condText = map(
                    lambda x: x.strip(),
                    re.split('\s* in \s*', cond))
                cond = "%sfor %s in " % (' ' * self.indent, condVar)
                if condText[0] == '`' and condText[-1] == '`':
                    task = GUI(
                        show=None).ParseCommand(
                        cmd=utils.split(
                            condText[
                                1:-
                                1]))
                    cond += "grass.read_command("
                    cond += self._getPythonActionCmd(task,
                                                     len(cond),
                                                     variables=[condVar]) + ".splitlines()"
                else:
                    cond += condText
                self.fd.write('%s:\n' % cond)
                self.indent += 4
                variablesLoop = variables.copy()
                variablesLoop[condVar] = None
                for action in item.GetItems(
                        self.model.GetItems(objType=ModelAction)):
                    self._writePythonItem(
                        action, ignoreBlock=False, variables=variablesLoop)
                self.indent -= 4
            if isinstance(item, ModelCondition):
                self.fd.write('%sif %s:\n' % (' ' * self.indent, cond))
                self.indent += 4
                condItems = item.GetItems()
                for action in condItems['if']:
                    self._writePythonItem(action, ignoreBlock=False)
                if condItems['else']:
                    self.indent -= 4
                    self.fd.write('%selse:\n' % (' ' * self.indent))
                    self.indent += 4
                    for action in condItems['else']:
                        self._writePythonItem(action, ignoreBlock=False)
                self.indent += 4
        self.fd.write('\n')
        if isinstance(item, ModelComment):
            self._writePythonComment(item)

    def _writePythonAction(self, item, variables={}):
        """Write model action to Python file"""
        task = GUI(show=None).ParseCommand(cmd=item.GetLog(string=False))
        strcmd = "%srun_command(" % (' ' * self.indent)
        self.fd.write(
            strcmd +
            self._getPythonActionCmd(
                task,
                len(strcmd),
                variables) +
            '\n')

    def _getPythonActionCmd(self, task, cmdIndent, variables={}):
        opts = task.get_options()

        ret = ''
        flags = ''
        params = list()

        for f in opts['flags']:
            if f.get('value', False):
                name = f.get('name', '')
                if len(name) > 1:
                    params.append('%s = True' % name)
                else:
                    flags += name

        for p in opts['params']:
            name = p.get('name', None)
            value = p.get('value', None)
            if name and value:
                ptype = p.get('type', 'string')
                foundVar = False

                for var in sorted(variables, key=len, reverse=True):
                    data = variables[var]
                    if '%' + var in value:
                        value = self._substituteVariable(value, var, data)
                        foundVar = True

                if foundVar or ptype != 'string':
                    params.append("%s = %s" % (name, value))
                else:
                    params.append('%s = "%s"' % (name, value))

        ret += '"%s"' % task.get_name()
        if flags:
            ret += ",\n%sflags = '%s'" % (' ' * cmdIndent, flags)
        if len(params) > 0:
            ret += ",\n"
            for opt in params[:-1]:
                ret += "%s%s,\n" % (' ' * cmdIndent, opt)
            ret += "%s%s)" % (' ' * cmdIndent, params[-1])
        else:
            ret += ")"

        return ret

    def _writePythonComment(self, item):
        """Write model comment to Python file"""
        for line in item.GetLabel().splitlines():
            self.fd.write('#' + line + '\n')

    def _substituteVariable(self, string, variable, data):
        """Substitute variable in the string

        :param string: string to be modified
        :param variable: variable to be substituted
        :param data: data related to the variable

        :return: modified string
        """
        result = ''
        ss = re.split("\w*(%" + variable + ")w*", string)

        if not ss[0] and not ss[-1]:
            if data:
                return "options['%s']" % variable
            else:
                return variable

        for s in ss:
            if not s or s == '"':
                continue

            if s == '%' + variable:
                if data:
                    result += "+options['%s']+" % variable
                else:
                    result += '+%s+' % variable
            else:
                result += '"' + s
                if not s.endswith(']'):  # options
                    result += '"'

        return result.strip('+')


class ModelParamDialog(wx.Dialog):

    def __init__(
            self, parent, model, params, id=wx.ID_ANY,
            title=_("Model parameters"),
            style=wx.DEFAULT_DIALOG_STYLE | wx.RESIZE_BORDER, **kwargs):
        """Model parameters dialog
        """
        self.parent = parent
        self._model = model
        self.params = params
        self.tasks = list()  # list of tasks/pages

        wx.Dialog.__init__(
            self,
            parent=parent,
            id=id,
            title=title,
            style=style,
            **kwargs)

        self.notebook = GNotebook(parent=self,
                                  style=globalvar.FNPageDStyle)

        panel = self._createPages()
        wx.CallAfter(self.notebook.SetSelection, 0)

        # intermediate data?
        self.interData = wx.CheckBox(parent=self, label=_(
            "Delete intermediate data when finish"))
        self.interData.SetValue(True)
        rast, vect, rast3d, msg = self._model.GetIntermediateData()
        if not rast and not vect and not rast3d:
            self.interData.Hide()

        self.btnCancel = wx.Button(parent=self, id=wx.ID_CANCEL)
        self.btnRun = wx.Button(parent=self, id=wx.ID_OK,
                                label=_("&Run"))
        self.btnRun.SetDefault()

        self._layout()

        size = self.GetBestSize()
        self.SetMinSize(size)
        self.SetSize((size.width, size.height +
                      panel.constrained_size[1] -
                      panel.panelMinHeight))

    def _layout(self):
        btnSizer = wx.StdDialogButtonSizer()
        btnSizer.AddButton(self.btnCancel)
        btnSizer.AddButton(self.btnRun)
        btnSizer.Realize()

        mainSizer = wx.BoxSizer(wx.VERTICAL)
        mainSizer.Add(self.notebook, proportion=1,
                      flag=wx.EXPAND)
        if self.interData.IsShown():
            mainSizer.Add(self.interData, proportion=0,
                          flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER, border=5)

            mainSizer.Add(wx.StaticLine(parent=self, id=wx.ID_ANY,
                                        style=wx.LI_HORIZONTAL),
                          proportion=0,
                          flag=wx.EXPAND | wx.LEFT | wx.RIGHT, border=5)

        mainSizer.Add(btnSizer, proportion=0,
                      flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER, border=5)

        self.SetSizer(mainSizer)
        mainSizer.Fit(self)

    def _createPages(self):
        """Create for each parameterized module its own page"""
        nameOrdered = [''] * len(self.params.keys())
        for name, params in self.params.iteritems():
            nameOrdered[params['idx']] = name
        for name in nameOrdered:
            params = self.params[name]
            panel = self._createPage(name, params)
            if name == 'variables':
                name = _('Variables')
            self.notebook.AddPage(page=panel, text=name)

        return panel

    def _createPage(self, name, params):
        """Define notebook page"""
        if name in globalvar.grassCmd:
            task = gtask.grassTask(name)
        else:
            task = gtask.grassTask()
        task.flags = params['flags']
        task.params = params['params']

        panel = CmdPanel(parent=self, id=wx.ID_ANY, task=task,
                         giface=GraphicalModelerGrassInterface(self._model))
        self.tasks.append(task)

        return panel

    def GetErrors(self):
        """Check for errors, get list of messages"""
        errList = list()
        for task in self.tasks:
            errList += task.get_cmd_error()

        return errList

    def DeleteIntermediateData(self):
        """Check if to detele intermediate data"""
        if self.interData.IsShown() and self.interData.IsChecked():
            return True

        return False