feat: 🎸 My own command line parser

Cargo.toml

@@ -1,7 +1,4 @@
 [package]
 name = "ponyfetch"
 version = "0.1.0"
-edition = "2021"
-
-[dependencies]
-clap = { version = "4.0.29", features = ["derive"] }
+edition = "2021"

src/args.rs

@@ -1,15 +0,0 @@
-#[derive(clap::Parser)]
-#[clap(
-    version = "1.0", 
-    author = "Atsukoro1",
-    about = "Just a simple cross-platform neofetch for all the bronies out there."
-)]
-pub struct Args {
-    #[clap(short, long, required = false, default_value = "rainbowdash")]
-    /// Defines what ASCII pony to print.
-    pub pony: String,
-
-    #[clap(short, long, required = false, default_value = "green")]
-    /// Defines what color to print the output it
-    pub color: String
-}

src/helpers/arguments.rs

@@ -0,0 +1,106 @@
+use crate::helpers::colors::COLORS;
+
+#[derive(Debug)]
+pub struct Arguments {
+    pub help: bool,
+    pub color: String,
+    pub pony: String   
+}
+
+impl Arguments {
+    fn validate_color(color: String) -> String {
+        for c in COLORS.iter() {
+            if c.0 == color {
+                return color.to_string();
+            }
+        };
+
+        Self::print_err("Invalid color provided.");
+        std::process::exit(1);
+    }
+
+    fn validate_pony(pony: String) -> String {
+        let ponies = crate::helpers::paths::get_ponies();
+
+        for p in ponies.iter() {
+            if p == &pony {
+                return pony.to_string();
+            }
+        };
+
+        Self::print_err("Invalid pony provided.");
+        std::process::exit(1);
+    }   
+
+    fn print_help() {
+        println!("Usage: ponyfetch [OPTION]...");
+        println!("Prints a pony with system information.");
+        println!("
+            -h, --help      Display this help and exit
+            -c, --color     Set the color of the pony
+            -p, --pony      Set the pony to display
+        ");
+        
+        std::process::exit(0);
+    }
+
+    fn print_err(err: &str) {
+        println!("Error: {}", err);
+        println!("Usage: ponyfetch [OPTION]...");
+        println!("Try 'ponyfetch --help' for more information.");
+        std::process::exit(1);
+    }
+
+    fn get_args(arg: String) -> String {
+        let args = arg.split("=").collect::<Vec<&str>>();
+
+        if args.len() < 2 {
+            Self::print_err("Invalid argument provided.");
+        };
+
+        args[1].to_string()
+    }
+
+    pub fn parse() -> Arguments {
+        let mut args = Arguments {
+            help: false,
+            color: String::from(""),
+            pony: String::from("")
+        };
+
+        let args_vec: Vec<String> = std::env::args().collect();
+
+        args_vec.into_iter().for_each(|arg| {
+            match arg {
+                arg if arg == "--help" || arg == "-h" => args.help = true,
+
+                arg if arg.contains("--color") || arg.contains("-c") => {
+                    args.color = Self::validate_color(
+                        Self::get_args(arg)
+                    );
+                },
+
+                arg if arg.contains("--pony") || arg.contains("-p") => {
+                    args.pony = Self::validate_pony(
+                        Self::get_args(arg)
+                    );
+                },
+                _ => ()
+            }
+        });
+
+        if args.color == "" {
+            args.color = String::from("blue");
+        }
+
+        if args.pony == "" {
+            args.pony = String::from("rainbowdash");
+        }
+
+        if args.help {
+            Self::print_help();
+        }
+
+        args
+    }
+}

src/helpers/colors.rs

@@ -1,4 +1,4 @@
-const COLORS : [(&str, &str); 34] = [
+pub const COLORS : [(&str, &str); 34] = [
     ("black", "\u{001b}[30m"),
     ("red", "\u{001b}[31m"),
     ("green", "\u{001b}[32m"),

src/helpers/mod.rs

@@ -1,3 +1,4 @@
+pub mod arguments;
 pub mod file;
 pub mod colors;
 pub mod print;

src/helpers/paths.rs

@@ -1,5 +1,19 @@
 use std::path::PathBuf;
 
+pub fn get_ponies() -> Vec<String> {
+    let mut ponies: Vec<String> = Vec::new();
+    let pony_files = std::fs::read_dir(get_pony_path()).unwrap();
+
+    pony_files.for_each(|file| {
+        let file = file.unwrap();
+        let file_name = file.file_name().into_string().unwrap();
+        let file_name = file_name.split(".").collect::<Vec<&str>>()[0].to_string();
+        ponies.push(file_name);
+    });
+
+    ponies
+}
+
 #[cfg(target_os = "linux")]
 pub fn get_pony_path() -> String {
     if std::env::current_exe().unwrap().to_str().unwrap().contains("target") {

src/main.rs

@@ -1,9 +1,7 @@
-use clap::Parser;
-use args::Args;
+use helpers::arguments::Arguments;
 
 mod helpers;
 mod system;
-mod args;
 
 #[derive(Clone, Copy, Debug)]
 pub enum ActionType {
@@ -110,7 +108,8 @@ const ACTIONS: [Action; 13] = [
 ];
 
 fn main() {
-    let args: Args = Args::parse();
+    let args = Arguments::parse();
+    println!("{:?}", args);
 
     let line_count = helpers::file::get_file_linecount(
         &format!("{}{}.txt", helpers::paths::get_pony_path(), &args.pony)