✨ Adds .lottie support (#621)

## What does this change?

Resolves #505

## Type of change

- [x] New feature (non-breaking change which adds functionality)
- [x] This change requires a documentation update

Author: AlexV525

README.md

@@ -394,11 +394,11 @@ Widget build(BuildContext context) {
 
 **Available Integrations**
 
-| Packages                                                | File extension | Setting               | Usage                                     |
-|---------------------------------------------------------|----------------|-----------------------|-------------------------------------------|
-| [flutter_svg](https://pub.dev/packages/flutter_svg)     | .svg           | `flutter_svg: true`   | Assets.images.icons.paint.**svg()**       |
-| [rive](https://pub.dev/packages/rive)                   | .riv           | `rive: true`          | Assets.rive.vehicles.**rive()**           |
-| [lottie](https://pub.dev/packages/lottie)               | .json, .zip    | `lottie: true`        | Assets.lottie.hamburgerArrow.**lottie()** |
+| Packages                                                | File extension       | Setting               | Usage                                     |
+|---------------------------------------------------------|----------------------|-----------------------|-------------------------------------------|
+| [flutter_svg](https://pub.dev/packages/flutter_svg)     | .svg                 | `flutter_svg: true`   | Assets.images.icons.paint.**svg()**       |
+| [rive](https://pub.dev/packages/rive)                   | .riv                 | `rive: true`          | Assets.rive.vehicles.**rive()**           |
+| [lottie](https://pub.dev/packages/lottie)               | .json, .zip, .lottie | `lottie: true`        | Assets.lottie.hamburgerArrow.**lottie()** |
 
 In other cases, the asset is generated as String class.
 

examples/example/assets/lottie/XuiIZ9X1Rf.lottie

@@ -74,6 +74,10 @@ class $AssetsJsonGen {
 class $AssetsLottieGen {
   const $AssetsLottieGen();
 
+  /// File path: assets/lottie/XuiIZ9X1Rf.lottie
+  LottieGenImage get xuiIZ9X1Rf =>
+      const LottieGenImage('assets/lottie/XuiIZ9X1Rf.lottie');
+
   /// File path: assets/lottie/alarm-clock-lottie-v440.json
   LottieGenImage get alarmClockLottieV440 =>
       const LottieGenImage('assets/lottie/alarm-clock-lottie-v440.json');
@@ -95,11 +99,12 @@ class $AssetsLottieGen {
 
   /// List of all assets
   List<LottieGenImage> get values => [
-        alarmClockLottieV440,
-        geometricalAnimation,
-        hamburgerArrow,
-        spinningCarrousel
-      ];
+    xuiIZ9X1Rf,
+    alarmClockLottieV440,
+    geometricalAnimation,
+    hamburgerArrow,
+    spinningCarrousel,
+  ];
 }
 
 class $AssetsMixGen {

examples/example/lib/gen/assets.gen.dart

@@ -116,12 +116,15 @@ ${isPackage ? "\n  static const String package = '$packageName';" : ''}
   @override
   bool get isConstConstructor => true;
 
-  bool isLottieFile(AssetType type) {
-    if (!_supportedMimeTypes.contains(type.mime)) {
+  bool isLottieFile(AssetType asset) {
+    if (asset.extension == '.lottie') {
+      return true;
+    }
+    if (!_supportedMimeTypes.contains(asset.mime)) {
       return false;
     }
-    if (type.mime == 'application/zip') {
-      final inputStream = InputFileStream(type.fullPath);
+    if (asset.mime == 'application/zip') {
+      final inputStream = InputFileStream(asset.fullPath);
       final archive = ZipDecoder().decodeBuffer(inputStream);
       final jsonFile = archive.files.firstWhereOrNull(
         (e) => e.name.endsWith('.json'),
@@ -130,9 +133,9 @@ ${isPackage ? "\n  static const String package = '$packageName';" : ''}
         return false;
       }
       final content = utf8.decode(jsonFile!.content);
-      return _isValidJsonFile(type, overrideInput: content);
+      return _isValidJsonFile(asset, overrideInput: content);
     }
-    return _isValidJsonFile(type);
+    return _isValidJsonFile(asset);
   }
 
   bool _isValidJsonFile(AssetType type, {String? overrideInput}) {

packages/core/lib/generators/integrations/lottie_integration.dart

@@ -11,3 +11,4 @@ flutter:
   assets:
     - assets/lottie/hamburger_arrow.json
     - assets/lottie/spinning_carrousel.zip
+    - assets/lottie/XuiIZ9X1Rf.lottie