making the text in the library smarter

src/core/content.rs

@@ -7,4 +7,5 @@ pub trait Content {
     fn kind(&self) -> ServiceItemKind;
     fn to_service_item(&self) -> ServiceItem;
     fn background(&self) -> Option<Background>;
+    fn subtext(&self) -> String;
 }

src/core/images.rs

@@ -53,6 +53,17 @@ impl Content for Image {
             None
         }
     }
+
+    fn subtext(&self) -> String {
+        if self.path.exists() {
+            self.path
+                .file_name()
+                .map(|f| f.to_string_lossy().to_string())
+                .unwrap_or("Missing image".into())
+        } else {
+            "Missing image".into()
+        }
+    }
 }
 
 impl From<Value> for Image {

src/core/presentations.rs

@@ -65,6 +65,17 @@ impl Content for Presentation {
             None
         }
     }
+
+    fn subtext(&self) -> String {
+        if self.path.exists() {
+            self.path
+                .file_name()
+                .map(|f| f.to_string_lossy().to_string())
+                .unwrap_or("Missing presentation".into())
+        } else {
+            "Missing presentation".into()
+        }
+    }
 }
 
 impl From<Value> for Presentation {

src/core/songs.rs

@@ -59,6 +59,10 @@ impl Content for Song {
     fn background(&self) -> Option<Background> {
         self.background.clone()
     }
+
+    fn subtext(&self) -> String {
+        self.author.clone().unwrap_or("Author missing".into())
+    }
 }
 
 impl ServiceTrait for Song {

src/core/videos.rs

@@ -58,6 +58,17 @@ impl Content for Video {
             None
         }
     }
+
+    fn subtext(&self) -> String {
+        if self.path.exists() {
+            self.path
+                .file_name()
+                .map(|f| f.to_string_lossy().to_string())
+                .unwrap_or("Missing video".into())
+        } else {
+            "Missing video".into()
+        }
+    }
 }
 
 impl From<Value> for Video {