feat: Implement -a -A and -d flags

lib/parsing/parser.dart

@@ -47,6 +47,35 @@ ParseResult extract(final List<String> args) {
         currentStage = stageResult.stage;
         result = stageResult.result;
         break;
+
+      case ParsingStage.album:
+        final stageResult = _onEntityStage(
+          arg,
+          result,
+          currentStage,
+          FunkEntity.album,
+        );
+        currentStage = stageResult.stage;
+        result = stageResult.result;
+        break;
+
+      case ParsingStage.artist:
+        final stageResult = _onEntityStage(
+          arg,
+          result,
+          currentStage,
+          FunkEntity.artist,
+        );
+        currentStage = stageResult.stage;
+        result = stageResult.result;
+        break;
+
+      case ParsingStage.domain:
+        final stageResult = _onDomainStage(arg, result, currentStage);
+        currentStage = stageResult.stage;
+        result = stageResult.result;
+        break;
+
       default:
         console.error('not implemented yet');
         break;
@@ -56,6 +85,58 @@ ParseResult extract(final List<String> args) {
   return result;
 }
 
+StageResult _onEntityStage(
+  final String arg,
+  final ParseResult previousResult,
+  final ParsingStage previousStage,
+  final FunkEntity kind,
+) {
+  ParsingStage currentStage = previousStage;
+  ParseResult result = previousResult;
+
+  if (int.tryParse(arg) != null) {
+    currentStage = ParsingStage.nothing;
+    result = ParseResult(
+      action: previousResult.action,
+      success: true,
+      object: FunkObject(
+        domain: previousResult.object?.domain ?? '',
+        id: arg,
+        kind: kind,
+      ),
+    );
+  }
+
+  return StageResult(result: result, stage: currentStage);
+}
+
+StageResult _onDomainStage(
+  final String arg,
+  final ParseResult previousResult,
+  final ParsingStage previousStage,
+) {
+  ParsingStage currentStage = previousStage;
+  ParseResult result = previousResult;
+
+  try {
+    final Uri uri = Uri.parse(arg);
+    currentStage = ParsingStage.nothing;
+    result = ParseResult(
+      action: previousResult.action,
+      success: true,
+      object: FunkObject(
+        domain: uri.toString(),
+        id: previousResult.object?.id ?? '',
+        kind: previousResult.object?.kind ?? FunkEntity.album,
+      ),
+    );
+  } catch (e) {
+    console.error(e.toString());
+  }
+
+  return StageResult(result: result, stage: currentStage);
+}
+
 StageResult _onNothingStage(
   final String arg,
   final ParseResult previousResult,
@@ -80,6 +161,10 @@ StageResult _onNothingStage(
     case '--path':
       currentStage = ParsingStage.path;
       break;
+    case '-d':
+    case '--domain':
+      currentStage = ParsingStage.domain;
+      break;
     default:
       try {
         final Uri uri = Uri.parse(arg);

lib/parsing/parsing_stage.dart

@@ -5,4 +5,5 @@ enum ParsingStage {
   song,
   path,
   upload,
+  domain,
 }