chore: Decompose large functions of parser

lib/parsing/parser.dart

@@ -216,6 +216,64 @@ StageResult _onPathStage(
   return StageResult(result: result, stage: currentStage);
 }
 
+ParseResult _makeParseResultFromEntityInfo(
+  final FunkEntity kind,
+  final String host,
+  final String id,
+) =>
+    ParseResult(
+      action: Action.download,
+      success: true,
+      object: FunkObject(
+        kind: kind,
+        id: id,
+        domain: host,
+      ),
+    );
+
+ParseResult _parseUrl(final String url, final ParseResult previousResult) {
+  ParseResult result = previousResult;
+  try {
+    final Uri uri = Uri.parse(url);
+
+    final segments = uri.pathSegments;
+    for (int i = 0; i < segments.length; ++i) {
+      switch (segments[i]) {
+        case 'artists':
+          result = _makeParseResultFromEntityInfo(
+            FunkEntity.artist,
+            uri.host,
+            segments[i + 1],
+          );
+          ++i;
+          break;
+
+        case 'tracks':
+          result = _makeParseResultFromEntityInfo(
+            FunkEntity.track,
+            uri.host,
+            segments[i + 1],
+          );
+          ++i;
+          break;
+
+        case 'albums':
+          result = _makeParseResultFromEntityInfo(
+            FunkEntity.album,
+            uri.host,
+            segments[i + 1],
+          );
+          ++i;
+          break;
+      }
+    }
+  } catch (e) {
+    console.error(e.toString());
+  }
+
+  return result;
+}
+
 StageResult _onNothingStage(
   final String arg,
   final ParseResult previousResult,
@@ -254,56 +312,7 @@ StageResult _onNothingStage(
       currentStage = ParsingStage.nothing;
       break;
     default:
-      try {
+      result = _parseUrl(arg, result);
-        final Uri uri = Uri.parse(arg);
-
-        final segments = uri.pathSegments;
-        for (int i = 0; i < segments.length; ++i) {
-          switch (segments[i]) {
-            case 'artists':
-              result = ParseResult(
-                action: Action.download,
-                success: true,
-                object: FunkObject(
-                  kind: FunkEntity.artist,
-                  id: segments[i + 1],
-                  domain: uri.host,
-                ),
-              );
-              ++i;
-              break;
-
-            case 'tracks':
-              result = ParseResult(
-                action: Action.download,
-                success: true,
-                object: FunkObject(
-                  kind: FunkEntity.track,
-                  id: segments[i + 1],
-                  domain: uri.host,
-                ),
-              );
-              ++i;
-              break;
-
-            case 'albums':
-              result = ParseResult(
-                action: Action.download,
-                success: true,
-                object: FunkObject(
-                  kind: FunkEntity.album,
-                  id: segments[i + 1],
-                  domain: uri.host,
-                ),
-              );
-              ++i;
-              break;
-          }
-        }
-      } catch (e) {
-        console.error(e.toString());
-        currentStage = ParsingStage.nothing;
-      }
       break;
   }