tsk-50: Create functionality to extract song properties (#52)

Closes #50

Reviewed-on: #52
Co-authored-by: phoenix <kundeng00@pm.me>
Co-committed-by: phoenix <kundeng00@pm.me>

src/properties/mod.rs

@@ -0,0 +1,139 @@
+pub mod audio;
+
+#[derive(Clone, Debug, Default)]
+pub struct SongProperties {
+    pub duration: std::time::Duration,
+    pub sample_rate: u32,
+    pub bitrate: u32,
+    pub overall_bitrate: u32,
+    pub bit_depth: u8,
+    pub channels: u8,
+}
+
+pub fn get_song_properties(song_path: &str) -> Result<SongProperties, std::io::Error> {
+    match audio::get_properties(song_path) {
+        Ok(flac_properties) => Ok(SongProperties {
+            duration: flac_properties.duration(),
+            sample_rate: flac_properties.sample_rate(),
+            bitrate: flac_properties.audio_bitrate(),
+            overall_bitrate: flac_properties.overall_bitrate(),
+            bit_depth: flac_properties.bit_depth(),
+            channels: flac_properties.channels(),
+        }),
+        Err(err) => Err(err),
+    }
+}
+
+pub fn get_duration(song_path: &str) -> Result<std::time::Duration, std::io::Error> {
+    match get_song_properties(song_path) {
+        Ok(song_properties) => Ok(song_properties.duration),
+        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();
+                let new_filepath = test_util::util::generate_newfilepath(&dir).unwrap();
+
+                match test_util::util::copy_file(&filepath, &new_filepath) {
+                    Ok(_) => match super::get_duration(&new_filepath) {
+                        Ok(duration) => {
+                            test_util::util::remove_file(&new_filepath).unwrap();
+
+                            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:?}");
+                    }
+                }
+            }
+            Err(err) => {
+                assert!(false, "Error: {err:?}");
+            }
+        }
+    }
+
+    #[test]
+    fn test_song_properties() {
+        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();
+                let new_filepath = test_util::util::generate_newfilepath(&dir).unwrap();
+
+                match test_util::util::copy_file(&filepath, &new_filepath) {
+                    Ok(_) => match super::get_song_properties(&new_filepath) {
+                        Ok(song_properties) => {
+                            test_util::util::remove_file(&new_filepath).unwrap();
+
+                            let song_duration: u64 = 41;
+                            let bitrate: u32 = 1;
+                            let overall_bitrate: u32 = 3;
+                            let bit_depth: u8 = 24;
+                            let channels: u8 = 2;
+
+                            let fetched_song_duration = song_properties.duration.as_secs();
+                            let fetched_bitrate = song_properties.bitrate;
+                            let fetched_overall_bitrate = song_properties.overall_bitrate;
+                            let fetched_bit_depth = song_properties.bit_depth;
+                            let fetched_channels = song_properties.channels;
+
+                            assert_eq!(
+                                song_duration, fetched_song_duration,
+                                "Durations should match, but they don't {song_duration} {fetched_song_duration} ({song_properties:?})"
+                            );
+
+                            assert_eq!(
+                                bitrate, fetched_bitrate,
+                                "Bitrates do not match {bitrate:?} {fetched_bitrate:?} {song_properties:?}"
+                            );
+                            assert_eq!(
+                                overall_bitrate, fetched_overall_bitrate,
+                                "Overall bitrates do not match {overall_bitrate:?} {fetched_overall_bitrate:?} {song_properties:?}"
+                            );
+                            assert_eq!(
+                                bit_depth, fetched_bit_depth,
+                                "Bit depth do not match {bit_depth:?} {fetched_bit_depth:?} {song_properties:?}"
+                            );
+                            assert_eq!(
+                                channels, fetched_channels,
+                                "Channels do not match {channels:?} {fetched_channels:?} {song_properties:?}"
+                            );
+                        }
+                        Err(err) => {
+                            assert!(false, "Error: {err:?}");
+                        }
+                    },
+                    Err(err) => {
+                        assert!(false, "Error: {err:?}");
+                    }
+                }
+            }
+            Err(err) => {
+                assert!(false, "Error: {err:?}");
+            }
+        }
+    }
+}