DynamicImage Struct implementation started

src/cli/mod.rs

@@ -1,28 +1,57 @@
-use clap::{App, Arg};
-
-const HELP_TEMPLATE: &str = "{bin} v{version}
-
------------
-
-{about}
-
-{all-args}
-
------------
-
-(C) 2020 {author}
-
-{after-help}";
+use clap::{App, Arg, ArgGroup};
 
 /// This function builds the Command Line Application
 /// already with its metadata, args boundaries etc.
 pub fn build_cli() -> App<'static, 'static> {
     App::new("Image Editor application")
+        // METADATA
         .author(crate_authors!())
         .version(crate_version!())
         .about("Edit, transform, crop, rotate etc. an image with just one command")
-        .template(HELP_TEMPLATE)
-        .before_help("Thanks for using this app bro :)")
         .after_help("Have a nice day!")
-        .arg(Arg::with_name("FILE").index(1).required(true))
+        // POSITIONAL ARGUMENTS
+        .arg(
+            Arg::with_name("INPUT")
+                .help("Sets the input image file to edit")
+                .index(1)
+                .required(true),
+        )
+        .arg(
+            Arg::with_name("OUTPUT")
+                .help("Sets the output path to store the image (defaults to the input + a number)")
+                .required(true)
+                .index(2),
+        )
+        // OPTIONALS GROUP, AT LEAST ONE OPTION IS REQUIRED
+        .group(
+            ArgGroup::with_name("options")
+                .required(true)
+                .multiple(true)
+                .args(&["blur", "huerotate", "brighten", "contrast"]),
+        )
+        // OPTIONAL ARGUMENTS
+        .arg(
+            Arg::with_name("blur")
+                .long("blur")
+                .takes_value(true)
+                .help("Apply blur to the image"),
+        )
+        .arg(
+            Arg::with_name("huerotate")
+                .long("hue-rotate")
+                .takes_value(true)
+                .help("Rotate the hue color scale of the image"),
+        )
+        .arg(
+            Arg::with_name("brighten")
+                .long("brighten")
+                .takes_value(true)
+                .help("Sets the brighten of the image"),
+        )
+        .arg(
+            Arg::with_name("contrast")
+                .long("contrast")
+                .takes_value(true)
+                .help("Apply contrast to the image"),
+        )
 }

src/lib.rs

@@ -1,4 +1,5 @@
 #[macro_use]
 extern crate clap;
+extern crate image;
 
-pub mod cli;
+pub mod cli;

src/main.rs

@@ -1,10 +1,13 @@
-extern crate clap;
-extern crate image;
-
-use lib::cli;
+use image::{DynamicImage, open};
+use lib::{cli};
 
 fn main() {
     let matches = cli::build_cli().get_matches();
 
+    let input = matches.value_of("INPUT").unwrap();
+    let output = matches.value_of("OUTPUT").unwrap();
+    let image = open(input).unwrap();
+
+    image.save(output).unwrap();
 }