factor out modules; modal -> dialog

src/model/entry.rs

@@ -86,6 +86,28 @@ impl Entry {
     pub fn set_track (&self, value: &impl AsRef<str>) -> Option<TagItem> {
         self.info.write().unwrap().set_track(value)
     }
+    pub const ICON_DIRECTORY:     &'static str = "";
+    pub const ICON_IMAGE:         &'static str = "󰋩";
+    pub const ICON_MUSIC:         &'static str = "";
+    pub const ICON_MUSIC_NO_META: &'static str = "󰎇";
+    pub const ICON_UNKNOWN:       &'static str = "";
+    pub fn name (&self) -> Option<Arc<str>> {
+        let indent = "".pad_to_width((self.depth - 1) * 2);
+        let icon   = self.icon();
+        let name   = self.path.iter().last().expect("empty path").display();
+        Some(format!("{indent}{icon} {name}").into())
+    }
+    fn icon (&self) -> &'static str {
+        if self.is_directory() {
+            Self::ICON_DIRECTORY
+        } else if self.is_image() {
+            Self::ICON_IMAGE
+        } else if self.is_music() {
+            Self::ICON_MUSIC
+        } else {
+            Self::ICON_UNKNOWN
+        }
+    }
 }
 
 impl Eq for Entry {}