Simplify images, tag overview

CHDataManagement/Model/FileType.swift

@@ -103,6 +103,10 @@ enum FileType: String {
 
     case aac
 
+    case m4b
+
+    case m4a
+
     // MARK: Other
 
     case noExtension
@@ -143,7 +147,7 @@ enum FileType: String {
             return .image
         case .mp4, .m4v, .webm:
             return .video
-        case .mp3, .aac:
+        case .mp3, .aac, .m4b, .m4a:
             return .audio
         case .js, .css, .ttf:
             return .asset
@@ -160,65 +164,38 @@ enum FileType: String {
         }
     }
 
-    var fileExtension: String {
+    var fileExtension: String? {
         switch self {
-        case .noExtension, .unknown: return ""
+        case .noExtension, .unknown: return nil
         default:
             return rawValue
         }
     }
 
     var isImage: Bool {
-        switch self {
-        case .jpg, .png, .avif, .webp, .gif, .svg, .tiff:
-            return true
-        default:
-            return false
-        }
+        category == .image
     }
 
     var isVideo: Bool {
-        switch self {
-        case .mp4, .m4v, .webm:
-            return true
-        default:
-            return false
-        }
+        category == .video
     }
 
     var isAudio: Bool {
-        switch self {
-        case .mp3, .aac:
-            return true
-        default:
-            return false
-        }
+        category == .audio
     }
 
     var isAsset: Bool {
-        switch self {
-        case .js, .css, .ttf:
-            return true
-        default:
-            return false
-        }
+        category == .asset
     }
 
     var isTextFile: Bool {
-        switch self {
-        case .html, .cpp, .swift, .css, .js, .json, .conf, .yaml:
-            return true
-        default:
-            return false
+        switch category {
+        case .text, .code: return true
+        default: break
         }
-    }
-
-    var isOtherFile: Bool {
         switch self {
-        case .noExtension, .zip, .cddx, .pdf, .key, .psd:
-            return true
-        default:
-            return false
+        case .css, .js: return true
+        default: return false
         }
     }