[feat]: add 50% file

Author: DanielCech

Sources/ScriptToolkit/FileExtension.swift

@@ -198,13 +198,15 @@ public extension File {
     func prepareSongForPractise(outputFolder: Folder, overwrite: Bool = true) throws {
         let inputFolder = parent!
 
+        let fileName50 = nameExcludingExtension + "@50.m4a"
         let fileName75 = nameExcludingExtension + "@75.m4a"
         let fileName90 = nameExcludingExtension + "@90.m4a"
         let fileName100 = nameExcludingExtension + "@100.m4a"
 
         if !overwrite {
             let outputPath = outputFolder.path
-            if FileManager.default.fileExists(atPath: outputPath.appendingPathComponent(path: fileName75))
+            if FileManager.default.fileExists(atPath: outputPath.appendingPathComponent(path: fileName50))
+                && FileManager.default.fileExists(atPath: outputPath.appendingPathComponent(path: fileName75))
                 && FileManager.default.fileExists(atPath: outputPath.appendingPathComponent(path: fileName90))
                 && FileManager.default.fileExists(atPath: outputPath.appendingPathComponent(path: fileName100)) { return }
         }
@@ -223,11 +225,15 @@ public extension File {
         print("  Normalizing sample rate")
         let normWavFile = try originalWavFile.normalizeSampleRate(newName: inputFolder.path.appendingPathComponent(path: "wav-file-norm.wav"))
 
+        print("  Converting to 50% speed")
+        let file50 = try normWavFile.slowDownAudio(newName: inputFolder.path.appendingPathComponent(path: "tempo-50.wav"), percent: 0.5)
         print("  Converting to 75% speed")
         let file75 = try normWavFile.slowDownAudio(newName: inputFolder.path.appendingPathComponent(path: "tempo-75.wav"), percent: 0.75)
         print("  Converting to 90% speed")
         let file90 = try normWavFile.slowDownAudio(newName: inputFolder.path.appendingPathComponent(path: "tempo-90.wav"), percent: 0.9)
 
+        print("  Adding initial silence to 50% speed file")
+        let silencedFile50 = try file50.addSilence(newName: inputFolder.path.appendingPathComponent(path: "silence-50.wav"))
         print("  Adding initial silence to 75% speed file")
         let silencedFile75 = try file75.addSilence(newName: inputFolder.path.appendingPathComponent(path: "silence-75.wav"))
         print("  Adding initial silence to 90% speed file")
@@ -236,20 +242,24 @@ public extension File {
         let silencedFile100 = try normWavFile.addSilence(newName: inputFolder.path.appendingPathComponent(path: "silence-100.wav"))
 
         print("  Converting to M4A")
+        let silencedM4AFile50 = try silencedFile50.convertToM4A(newName: inputFolder.path.appendingPathComponent(path: fileName50))
         let silencedM4AFile75 = try silencedFile75.convertToM4A(newName: inputFolder.path.appendingPathComponent(path: fileName75))
         let silencedM4AFile90 = try silencedFile90.convertToM4A(newName: inputFolder.path.appendingPathComponent(path: fileName90))
         let silencedM4AFile100 = try silencedFile100.convertToM4A(newName: inputFolder.path.appendingPathComponent(path: fileName100))
 
         // Move result to output dir
         print("  Moving to destination folder")
+        try silencedM4AFile50.move(to: outputFolder)
         try silencedM4AFile75.move(to: outputFolder)
         try silencedM4AFile90.move(to: outputFolder)
         try silencedM4AFile100.move(to: outputFolder)
 
         // Clean up
         try originalWavFile.delete()
+        try file50.delete()
         try file75.delete()
         try file90.delete()
+        try silencedFile50.delete()
         try silencedFile75.delete()
         try silencedFile90.delete()
         try silencedFile100.delete()