Update Cargo.lock

Cargo.lock

@@ -2,6 +2,248 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
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+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is_terminal_polyfill",
+ "utf8parse",
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+
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+dependencies = [
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+ "anstyle",
+ "once_cell_polyfill",
+ "windows-sys",
+]
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+dependencies = [
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+ "clap_derive",
+]
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+ "clap_lex",
+ "strsim",
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+ "quote",
+ "syn",
+]
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 version = "0.1.0"
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+ "clap",
+ "serde",
+ "serde_json",
+]
+
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+ "quote",
+ "syn",
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+ "memchr",
+ "serde",
+ "serde_core",
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+ "quote",
+ "unicode-ident",
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Cargo.toml

@@ -1,7 +1,17 @@
 [package]
-name = "opencode-testing"
+name = "todo_app"
 version = "0.1.0"
-edition = "2024"
+edition = "2026"
+authors = ["Jakob Rönnbäck <jakob@rowanbrook.net>"]
+description = "A simple command-line todo list manager"
+license = "MIT"
+repository = "https://gitea.rowanbrook.net/jakob/Learn-Rust-through-projects.git"
+keywords = ["cli", "todo", "productivity"]
+categories = ["command-line-utilities"]
+
+[[bin]]
+name = "todo"
+path = "src/main.rs"
 
 [dependencies]
 clap = { version = "4.0.0", features = ["derive"] }

src/main.rs

@@ -1,6 +1,140 @@
-use std::env;
+use clap::{Parser, Subcommand};
+use serde::{Deserialize, Serialize};
+use std::fmt;
+use std::fs;
+use std::path::Path;
+
+#[derive(Parser)]
+#[command(name = "todo")]
+#[command(about = "A simple todo list manager")]
+struct Cli {
+    #[command(subcommand)]
+    command: Commands,
+}
+
+#[derive(Subcommand)]
+enum Commands {
+    Add { task: String },
+    List,
+    Complete { id: usize },
+    Remove { id: usize },
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+struct Task {
+    id: usize,
+    description: String,
+    completed: bool,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+struct TodoList {
+    tasks: Vec<Task>,
+    next_id: usize,
+}
+
+#[derive(Debug)]
+enum TodoError {
+    FileError(String),
+    ParseError(String),
+    TaskNotFound(usize),
+    InvalidInput(String),
+}
+
+impl fmt::Display for TodoError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            TodoError::FileError(msg) => write!(f, "File error: {}", msg),
+            TodoError::ParseError(msg) => write!(f, "Parse error: {}", msg),
+            TodoError::TaskNotFound(id) => write!(f, "Task {} not found", id),
+            TodoError::InvalidInput(msg) => write!(f, "Invalid input: {}", msg),
+        }
+    }
+}
+
+impl std::error::Error for TodoError {}
+
+impl TodoList {
+    fn new() -> Self {
+        TodoList {
+            tasks: Vec::new(),
+            next_id: 1,
+        }
+    }
+
+    fn load_from_file(filename: &str) -> Result<Self, Box<dyn std::error::Error>> {
+        if Path::new(filename).exists() {
+            let contents = fs::read_to_string(filename)?;
+            let todo_list = serde_json::from_str(&contents)?;
+            Ok(todo_list)
+        } else {
+            Ok(TodoList::new())
+        }
+    }
+
+    fn save_to_file(&self, filename: &str) -> Result<(), Box<dyn std::error::Error>> {
+        let json = serde_json::to_string_pretty(self)?;
+        fs::write(filename, json)?;
+        Ok(())
+    }
+
+    fn add_task(&mut self, description: String) -> Result<(), TodoError> {
+        if description.trim().is_empty() {
+            return Err(TodoError::InvalidInput(
+                "Task description cannot be empty".to_string(),
+            ));
+        }
+
+        let task = Task {
+            id: self.next_id,
+            description,
+            completed: false,
+        };
+
+        self.tasks.push(task);
+        self.next_id += 1;
+        Ok(())
+    }
+
+    fn complete_task(&mut self, id: usize) -> Result<(), TodoError> {
+        match self.tasks.iter_mut().find(|task| task.id == id) {
+            Some(task) => {
+                task.completed = true;
+                Ok(())
+            }
+            None => Err(TodoError::TaskNotFound(id)),
+        }
+    }
+}
 
 fn main() {
-    let args: Vec<String> = env::args().collect();
-    println!("Arguments: {:?}", args);
+    let cli = Cli::parse();
+
+    if let Err(e) = run_command(cli) {
+        eprintln!("Error: {}", e);
+        std::process::exit(1);
+    }
+}
+
+fn run_command(cli: Cli) -> Result<(), TodoError> {
+    let mut todo_list =
+        TodoList::load_from_file("tasks.json").map_err(|e| TodoError::FileError(e.to_string()))?;
+
+    match cli.command {
+        Commands::Add { task } => {
+            todo_list.add_task(task)?;
+            println!("Task added successfully");
+        }
+        Commands::Complete { id } => {
+            todo_list.complete_task(id)?;
+            println!("Task {} marked as complete", id);
+        }
+        _ => {} // Handle other commands
+    }
+
+    todo_list
+        .save_to_file("todo.json")
+        .map_err(|e| TodoError::FileError(e.to_string()))?;
+
+    Ok(())
 }