refactor(dataset creation): update API methods to return only posts

dto/post.py

@@ -1,3 +1,5 @@
+from dto.comment import Comment
+
 class Post:
     def __init__(self, 
                  id: str,
@@ -6,7 +8,8 @@ class Post:
                  content: str, 
                  url: str, 
                  timestamp: float, 
-                 source: str):
+                 source: str,
+                 comments: list[Comment]):
         self.id = id
         self.author = author
         self.title = title
@@ -14,7 +17,25 @@ class Post:
         self.url = url
         self.timestamp = timestamp
         self.source = source
+        self.comments = comments
         
         # Optionals
         self.subreddit = None
-        self.upvotes = None
+        self.upvotes = None
+
+    def to_dict(self):
+        return {
+            "id": self.id,
+            "author": self.author,
+            "title": self.title,
+            "content": self.content,
+            "url": self.url,
+            "timestamp": self.timestamp,
+            "source": self.source,
+            "comments": [
+                c.to_dict() if hasattr(c, "to_dict") else c
+                for c in self.comments
+            ],
+            "subreddit": self.subreddit,
+            "upvotes": self.upvotes,
+        }