initial version

Cargo.lock

@@ -0,0 +1,446 @@
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Cargo.toml

@@ -6,3 +6,5 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+clap = { version = "4.2.3", features = ["derive"] }
+cli-table = "0.4.7"

src/main.rs

@@ -1,3 +1,169 @@
+use clap::Parser;
+use std::collections::HashMap;
+use cli_table::{format::Justify, print_stdout, Table, WithTitle};
+
+
+#[derive(Table)]
+struct CharCounterTable {
+    #[table(title = "Character", justify = "Justify::Center")]
+    character: char,
+    #[table(title = "Unicode", justify = "Justify::Left")]
+    code: String,
+    #[table(title = "Counts", justify = "Justify::Right")]
+    counts: u64
+    
+}
+
+
+struct Counter {
+    files_text: u32,
+    files_nontext: u32,
+    directories: u32,
+    chars_total: u64,
+    charmap: HashMap<char, u64>
+}
+
+enum IncType {
+    Text,
+    NonText,
+    Directory,
+    Char(char)
+}
+
+impl Counter {    
+    fn new() -> Counter {
+        Counter {
+            files_text: 0,
+            files_nontext: 0,
+            directories: 0,
+            chars_total: 0,
+            charmap: HashMap::new()
+        }
+    }
+
+    fn increment(&mut self, file_type: IncType) {
+        match file_type {
+            IncType::Text => self.files_text += 1,
+            IncType::NonText => self.files_nontext += 1,
+            IncType::Directory => self.directories += 1,
+            IncType::Char(c) => {
+                let count = self.charmap.entry(c).or_insert(0);
+                *count += 1;
+                self.chars_total += 1;
+            }
+        }
+    }
+    
+}
+    
+
+#[derive(Parser)]
+struct Cli{
+    path: String
+}
+
+// increment the counter for each character
+fn char_count(s: &str, counter: &mut Counter) {
+    for c in s.chars() {
+        counter.increment(IncType::Char(c));
+    }
+}
+
+// read the file and return the contents as a string
+fn read_file(path: &std::path::Path, counter: &mut Counter) -> String {
+    let contents: Result<String, std::io::Error>= std::fs::read_to_string(path);
+    match contents {
+        Ok(contents) => {
+            counter.increment(IncType::Text);
+            return contents;
+        },
+        Err(_) => {
+            counter.increment(IncType::NonText);
+            return String::new();
+        }
+    }
+    
+}
+
+// reads the file and pass the contents to char_count
+fn do_counting(path: &std::path::Path, counter: &mut Counter){
+    let contents: String = read_file(path, counter);
+    char_count(&contents, counter);
+}
+
+// recursively walk through a directory and for each file, do_counting
+fn walk_dir(path: &std::path::Path, counter: &mut Counter) {
+    if path.is_dir() {
+        counter.increment(IncType::Directory);
+        for entry in std::fs::read_dir(path)
+            .expect("read_dir call failed") {
+            if let Ok(entry) = entry {
+                let path = entry.path();
+                if path.is_dir() {
+                    walk_dir(&path, counter);
+                } else if path.is_file() {
+                    do_counting(&path, counter);
+                }else{
+                    continue;
+                }
+            }
+        }
+    }
+}
+
+fn print_table(counter: &Counter) {
+    let mut counts_vec: Vec<CharCounterTable> = vec![];
+    let counts = &counter.charmap;
+    for (key, value) in counts {
+        counts_vec.push(CharCounterTable {
+            character: *key,
+            counts: *value,
+            code: format!("U+{:x};", *key as u32),
+        });
+    }
+    // sort the vector by counts
+    counts_vec.sort_by(|a, b| b.counts.cmp(&a.counts));
+
+    match print_stdout(counts_vec.with_title()) {
+        Ok(_) => (),
+        Err(_) => println!("Error printing table"),
+        
+    }
+}
+
 fn main() {
-    println!("Hello, world!");
+    //start the timer
+    let start = std::time::Instant::now();
+
+    //parse the command line arguments
+    let args = Cli::parse();
+
+    // check if path is directory or file
+    let path = std::path::Path::new(&args.path);
+
+    //define the counter
+    let mut counter = Counter::new();
+
+    if path.is_dir() {
+        walk_dir(path, &mut counter);
+    } else if path.is_file() {
+        do_counting(path, &mut counter);
+    } else {
+        println!("{} is not a valid path", path.display());
+    }
+
+    //stop the timer
+    let duration = start.elapsed();
+
+    if counter.charmap.len() > 0 {
+        print_table(&counter);
+    } 
+    println!("{} text files, {} non-text files, {} directories, {} chars, {:.6} secs",
+                counter.files_text,
+                counter.files_nontext,
+                counter.directories,
+                counter.chars_total,
+                duration.as_secs_f64()
+                );
+    
 }