Add Song/SongData conversions

src/songdata.rs

@@ -28,3 +28,70 @@ pub struct SongData {
 	/// For example, `"/assets/images/Song.jpg"`
 	pub image_path: String,
 }
+
+#[cfg(feature = "ssr")]
+impl TryInto<SongData> for Song {
+	type Error = Box<dyn std::error::Error>;
+
+	/// Convert a Song object into a SongData object
+	/// 
+	/// This conversion is expensive, as it requires database queries to get the artist and album objects.
+	/// The SongData/Song conversions are also not truly reversible,
+	/// due to the way the image_path, album, and artist data is handled.
+	fn try_into(self) -> Result<SongData, Self::Error> {
+		let mut db_con = database::get_db_conn();
+
+		let album = self.get_album(&mut db_con)?;
+
+		// Use the song's image path if it exists, otherwise use the album's image path, or fallback to the placeholder
+		let image_path = self.image_path.clone().unwrap_or_else(|| {
+			album
+				.as_ref()
+				.and_then(|album| album.image_path.clone())
+				.unwrap_or_else(|| "/assets/images/placeholder.jpg".to_string())
+		});
+
+		Ok(SongData {
+			id: self.id.ok_or("Song id must be present (Some) to convert to SongData")?,
+			title: self.title.clone(),
+			artists: self.get_artists(&mut db_con)?,
+			album: album,
+			track: self.track,
+			duration: self.duration,
+			release_date: self.release_date,
+			// TODO https://gitlab.mregirouard.com/libretunes/libretunes/-/issues/35
+			song_path: self.storage_path,
+			image_path: image_path,
+		})
+	}
+}
+
+impl TryInto<Song> for SongData {
+	type Error = Box<dyn std::error::Error>;
+
+	/// Convert a SongData object into a Song object
+	/// 
+	/// The SongData/Song conversions are also not truly reversible,
+	/// due to the way the image_path, album, and  and artist data is handled.
+	fn try_into(self) -> Result<Song, Self::Error> {
+		Ok(Song {
+			id: Some(self.id),
+			title: self.title,
+			album_id: self.album.map(|album|
+				album.id.ok_or("Album id must be present (Some) to convert to Song")).transpose()?,
+			track: self.track,
+			duration: self.duration,
+			release_date: self.release_date,
+			// TODO https://gitlab.mregirouard.com/libretunes/libretunes/-/issues/35
+			storage_path: self.song_path,
+
+			// Note that if the source of the image_path was the album, the image_path
+			// will be set to the album's image_path instead of None
+			image_path: if self.image_path == "/assets/images/placeholder.jpg" {
+				None
+			} else {
+				Some(self.image_path)
+			},
+		})
+	}
+}