Start to build report dialog

lib/enums/report_target_type.dart

@@ -0,0 +1,28 @@
+/// What kind of content that can be reported
+enum ReportTargetType {
+  Post,
+  Comment,
+  Conversation,
+  ConversationMessage,
+  User,
+  Group
+}
+
+extension ReportTargetExt on ReportTargetType {
+  String get apiId {
+    switch (this) {
+      case ReportTargetType.Post:
+        return "post";
+      case ReportTargetType.Comment:
+        return "comment";
+      case ReportTargetType.Conversation:
+        return "conversation";
+      case ReportTargetType.ConversationMessage:
+        return "conversation_message";
+      case ReportTargetType.User:
+        return "user";
+      case ReportTargetType.Group:
+        return "group";
+    }
+  }
+}