Loop interval can be customized

Signed-off-by: Thibault Meyer <meyer.thibault@gmail.com>

README.md

@@ -42,7 +42,8 @@ Options:
   -o, --download-only
           Download wallpaper, but dont try to change it automatically
   -l, --loop
-          Keep application running. Looking for new wallpaper every hours
+          Keep application running. Looking for new wallpaper every 900 seconds (15 minutes).
+          You can override value with `loop_interval_second` in your configuration file.
   -w, --nowindow
           Don't display console when not run from a CLI (Windows Only)
   -v, --version
@@ -85,6 +86,7 @@ background.
 
 ## Configuration file
 
+* `loop_interval_second` The interval in seconds between two wallpaper update attempts. Default value is `900`
 * `image_dimension_width` The "width" dimension of the wallpaper
 * `image_dimension_height` The "height" dimension of the wallpaper
 * `target_filename` The location where is stored the wallpaper

src/bingwallpaper/arguments.rs

@@ -17,7 +17,7 @@ pub struct BingWallpaperArguments {
     pub(crate) download_only: bool,
 
     /// If `true`, the application must continue to looking for new version of the image to use as wallpaper.
-    #[clap(long = "loop", short = 'l', help = "Keep application running. Looking for new wallpaper every hours")]
+    #[clap(long = "loop", short = 'l', help = "Keep application running. Looking for new wallpaper every 900 seconds (15 minutes)\nYou can override value with `loop_interval_second` in the configuration file")]
     pub(crate) must_loop: bool,
 
     /// If `true`, the application will don't display console

src/bingwallpaper/configuration.rs

@@ -9,6 +9,7 @@ use winit::window::WindowBuilder;
 /// Bing wallpaper application configuration
 #[derive(Serialize, Deserialize)]
 pub struct BingWallpaperConfiguration {
+    pub(crate) loop_interval_second: Option<u64>,
     pub(crate) image_dimension_width: u32,
     pub(crate) image_dimension_height: u32,
     pub(crate) target_filename: String,
@@ -21,6 +22,7 @@ pub struct BingWallpaperConfiguration {
 impl Default for BingWallpaperConfiguration {
     fn default() -> Self {
         Self {
+            loop_interval_second: 900.into(),
             image_dimension_height: 1080,
             image_dimension_width: 1920,
             target_filename: "/tmp/bingwallpaper.png".into(),

src/main.rs

@@ -48,8 +48,11 @@ fn main() {
         process::exit(0);
     }
 
-    // Creates BingWallpaperChanger instance
+    // Load configuration file
     let config = BingWallpaperConfiguration::load(args.config_file);
+    let sleep_duration_sec = config.loop_interval_second;
+
+    // Creates BingWallpaperChanger instance
     let bing_wallpaper_changer = BingWallpaperChanger::new(config);
 
     // Run
@@ -64,7 +67,7 @@ fn main() {
                     println!("Can't change wallpaper: {:?}", error);
                 }
 
-                sleep(Duration::from_secs(900));
+                sleep(Duration::from_secs(sleep_duration_sec.unwrap_or(900)));
             }
         }).unwrap();