add an option to set the pad wanted

src/lib.rs

@@ -15,10 +15,13 @@ pub struct Opt {
     // TODO: check if I really do this or not when implementing the recursive option
     pub comic_folder: PathBuf,
 
-    // TODO: implement the recursivity
-    /// Recursively treat each child folder as a it's own comic to bind
-    #[structopt(short, long)]
-    pub recursive: bool,
+    /// Set the pad you want to use
+    ///
+    /// If not set or set to a value inferior to the maximum pad of the comic, the value is
+    /// ignored.
+    #[structopt(long)]
+    pub pad: Option<usize>,
+
     // TODO: implement the prefix
     // /// Prefix to use for the files
     // ///
@@ -26,6 +29,11 @@ pub struct Opt {
     // /// For example: when the title contains the name of the comic with its season: fooS02-42.png
     // #[structopt(short, long)]
     // pub prefix: &str,
+
+    // TODO: implement the recursivity
+    /// Recursively treat each child folder as a it's own comic to bind
+    #[structopt(short, long)]
+    pub recursive: bool,
 }
 
 impl Opt {
@@ -78,15 +86,15 @@ impl Page {
 }
 
 pub struct ComicBook {
-    pad: Option<u64>,
+    pad: Option<usize>,
     pages: Vec<Page>,
 }
 
 impl ComicBook {
-    pub fn new(files: ReadDir) -> ComicBook {
+    pub fn new(files: ReadDir, pad: Option<usize>) -> ComicBook {
         let regex = Regex::new(r"\./(?P<prefix>\D*)(?P<number>\d*)(?P<suffix>.*)").unwrap();
         ComicBook {
-            pad: None,
+            pad,
             pages: files
                 .map(|entry| entry.unwrap().path())
                 .filter(|entry| entry.is_file())
@@ -109,7 +117,7 @@ impl ComicBook {
         for page in self.pages.iter() {
             //if let Some(pos) = page.position {
             let original_file = page.original_filename();
-            let new_file = page.new_filename(dbg!(pad));
+            let new_file = page.new_filename(pad);
 
             println!("{} -> {}", original_file, dbg!(new_file));
 
@@ -119,13 +127,23 @@ impl ComicBook {
     }
 
     fn get_pad_size(&self) -> Option<usize> {
-        Some(
-            self.pages
-                .iter()
-                .max_by_key(|x| x.number.len())?
-                .number
-                .len(),
-        )
+        let pad_pages = self
+            .pages
+            .iter()
+            .max_by_key(|x| x.number.len())?
+            .number
+            .len();
+
+        let pad = if let Some(pad_conf) = self.pad {
+            if pad_conf < pad_pages {
+                pad_pages
+            } else {
+                pad_conf
+            }
+        } else {
+            pad_pages
+        };
+        Some(pad)
     }
 }
 

src/main.rs

@@ -16,7 +16,7 @@ fn main() {
     }
 
     env::set_current_dir(opt.comic_folder).unwrap();
-    let mut book = ComicBook::new(fs::read_dir(".").unwrap());
+    let mut book = ComicBook::new(fs::read_dir(".").unwrap(), opt.pad);
 
     book.bind();