Duration (#40)

Reviewed-on: #40
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

src/properties.rs

@@ -0,0 +1,51 @@
+use lofty::file::AudioFile;
+
+pub fn get_duration(song_path: &String) -> Result<std::time::Duration, std::io::Error> {
+    match std::fs::File::open(song_path) {
+        Ok(mut content) => {
+            match lofty::flac::FlacFile::read_from(&mut content, lofty::config::ParseOptions::new())
+            {
+                Ok(flac_file) => {
+                    let properties = flac_file.properties();
+                    Ok(properties.duration())
+                }
+                Err(err) => Err(std::io::Error::other(err.to_string())),
+            }
+        }
+        Err(err) => Err(err),
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::test_util;
+
+    #[test]
+    fn test_get_duration() {
+        let filename = test_util::util::get_filename(1);
+        let dir = String::from(test_util::util::TESTFILEDIRECTORY);
+
+        match test_util::util::file_exists(&dir, &filename) {
+            Ok(_) => {
+                let filepath = test_util::util::get_full_path(&dir, &filename).unwrap();
+                match super::get_duration(&filepath) {
+                    Ok(duration) => {
+                        let song_duration: u64 = 41;
+                        let fetched_song_duration = duration.as_secs();
+
+                        assert_eq!(
+                            song_duration, fetched_song_duration,
+                            "Durations should match, but they don't {song_duration} {fetched_song_duration} ({duration:?})"
+                        );
+                    }
+                    Err(err) => {
+                        assert!(false, "Error: {err:?}");
+                    }
+                }
+            }
+            Err(err) => {
+                assert!(false, "Error: {err:?}");
+            }
+        }
+    }
+}