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Comments & Episode Reactions model layer.
Handles all MongoDB operations for the comment system.
"""
from datetime import datetime, timezone
from bson import ObjectId
from pymongo import ASCENDING, DESCENDING
from ..core.db_connector import comments_collection, episode_reactions_collection
# ─────────────────────────────────────────────────────────────────────────────
# Index setup (run once on import — idempotent)
# ─────────────────────────────────────────────────────────────────────────────
def _ensure_indexes():
try:
comments_collection.create_index(
[("anime_id", ASCENDING), ("episode_number", ASCENDING), ("created_at", DESCENDING)]
)
comments_collection.create_index([("parent_id", ASCENDING)])
episode_reactions_collection.create_index(
[("anime_id", ASCENDING), ("episode_number", ASCENDING)],
unique=True
)
except Exception:
pass # Don't crash the app if index creation fails
_ensure_indexes()
# ─────────────────────────────────────────────────────────────────────────────
# Helpers
# ─────────────────────────────────────────────────────────────────────────────
def _serialize_comment(doc):
"""Convert a MongoDB comment document into a JSON-serialisable dict."""
if not doc:
return None
return {
"_id": str(doc["_id"]),
"anime_id": doc.get("anime_id", ""),
"episode_number": doc.get("episode_number", 0),
"parent_id": str(doc["parent_id"]) if doc.get("parent_id") else None,
"author": doc.get("author", "Anonymous"),
"author_id": str(doc["author_id"]) if doc.get("author_id") is not None else None,
"avatar": doc.get("avatar"),
"body": doc.get("body", ""),
"gif_url": doc.get("gif_url"),
"likes": [str(u) for u in doc.get("likes", [])],
"dislikes": [str(u) for u in doc.get("dislikes", [])],
"like_count": len(doc.get("likes", [])),
"dislike_count": len(doc.get("dislikes", [])),
"created_at": doc["created_at"].isoformat() if doc.get("created_at") else None,
"edited_at": doc["edited_at"].isoformat() if doc.get("edited_at") else None,
"deleted": doc.get("deleted", False),
"replies": [], # populated by get_comments()
}
# ─────────────────────────────────────────────────────────────────────────────
# Comments
# ─────────────────────────────────────────────────────────────────────────────
def get_comments(anime_id: str, episode_number: int) -> list:
"""
Return all top-level comments for an episode, each with nested replies.
Replies are sorted oldest-first; top-level comments are sorted newest-first.
"""
raw = list(
comments_collection.find(
{"anime_id": anime_id, "episode_number": episode_number, "deleted": False},
sort=[("created_at", ASCENDING)],
)
)
top_level = []
reply_map: dict[str, list] = {}
for doc in raw:
serialized = _serialize_comment(doc)
pid = serialized["parent_id"]
if pid is None:
top_level.append(serialized)
else:
reply_map.setdefault(pid, []).append(serialized)
# Attach replies
for comment in top_level:
comment["replies"] = reply_map.get(comment["_id"], [])
# Sort top-level newest first
top_level.sort(key=lambda c: c["created_at"] or "", reverse=True)
return top_level
def create_comment(
anime_id: str,
episode_number: int,
author: str,
avatar,
body: str,
gif_url=None,
parent_id=None,
author_id=None,
) -> dict | None:
"""Insert a new comment and return the serialised document."""
if not body and not gif_url:
return None # Must have content
doc = {
"anime_id": anime_id,
"episode_number": int(episode_number),
"parent_id": ObjectId(parent_id) if parent_id else None,
"author": author,
"author_id": str(author_id) if author_id is not None else None,
"avatar": avatar,
"body": body.strip() if body else "",
"gif_url": gif_url,
"likes": [],
"dislikes": [],
"created_at": datetime.now(timezone.utc),
"edited_at": None,
"deleted": False,
}
result = comments_collection.insert_one(doc)
doc["_id"] = result.inserted_id
return _serialize_comment(doc)
def toggle_comment_reaction(comment_id: str, user_id: str, reaction_type: str) -> dict | None:
"""
Toggle like or dislike on a comment.
- Adding a like removes any existing dislike, and vice-versa.
- Reacting again to the same type removes it (toggle off).
Returns updated like/dislike counts, or None if comment not found.
"""
try:
oid = ObjectId(comment_id)
except Exception:
return None
doc = comments_collection.find_one({"_id": oid, "deleted": False})
if not doc:
return None
likes = [str(u) for u in doc.get("likes", [])]
dislikes = [str(u) for u in doc.get("dislikes", [])]
if reaction_type == "like":
if user_id in likes:
likes.remove(user_id) # toggle off
else:
likes.append(user_id)
if user_id in dislikes:
dislikes.remove(user_id) # remove opposite
elif reaction_type == "dislike":
if user_id in dislikes:
dislikes.remove(user_id) # toggle off
else:
dislikes.append(user_id)
if user_id in likes:
likes.remove(user_id) # remove opposite
else:
return None
comments_collection.update_one(
{"_id": oid},
{"$set": {"likes": likes, "dislikes": dislikes}},
)
return {"like_count": len(likes), "dislike_count": len(dislikes),
"user_liked": user_id in likes, "user_disliked": user_id in dislikes}
def edit_comment(comment_id: str, new_body: str, new_gif_url: str | None) -> dict | None:
"""Updates a comment's body/gif_url and sets edited_at timestamp."""
try:
oid = ObjectId(comment_id)
except Exception:
return None
update_fields = {"edited_at": datetime.now(timezone.utc)}
if new_body is not None: update_fields["body"] = new_body.strip()
if new_gif_url is not None: update_fields["gif_url"] = new_gif_url
comments_collection.update_one({"_id": oid}, {"$set": update_fields})
doc = comments_collection.find_one({"_id": oid})
return _serialize_comment(doc)
def delete_comment(comment_id: str) -> bool:
"""
Soft-deletes a comment (sets body/author to '[deleted]') if it has replies.
Otherwise, hard-deletes it completely.
"""
try:
oid = ObjectId(comment_id)
except Exception:
return False
has_replies = comments_collection.find_one({"parent_id": oid}) is not None
if has_replies:
comments_collection.update_one(
{"_id": oid},
{"$set": {
"body": "[deleted]",
"gif_url": None,
"author": "[deleted]",
"avatar": None,
"deleted": True # mark as formally deleted in UI state while preserving replies
}}
)
else:
comments_collection.delete_one({"_id": oid})
return True
# ─────────────────────────────────────────────────────────────────────────────
# Episode reactions
# ─────────────────────────────────────────────────────────────────────────────
def get_episode_reaction(anime_id: str, episode_number: int, user_id: str | None = None) -> dict:
"""Return episode like/dislike counts (and optionally the user's vote)."""
doc = episode_reactions_collection.find_one(
{"anime_id": anime_id, "episode_number": int(episode_number)}
)
likes = [str(u) for u in (doc.get("likes", []) if doc else [])]
dislikes = [str(u) for u in (doc.get("dislikes", []) if doc else [])]
result = {
"like_count": len(likes),
"dislike_count": len(dislikes),
"user_liked": False,
"user_disliked": False,
}
if user_id:
result["user_liked"] = user_id in likes
result["user_disliked"] = user_id in dislikes
return result
def toggle_episode_reaction(anime_id: str, episode_number: int, user_id: str, reaction_type: str) -> dict:
"""Toggle like or dislike on an episode. Returns updated counts."""
doc = episode_reactions_collection.find_one(
{"anime_id": anime_id, "episode_number": int(episode_number)}
)
if doc:
likes = [str(u) for u in doc.get("likes", [])]
dislikes = [str(u) for u in doc.get("dislikes", [])]
else:
likes, dislikes = [], []
if reaction_type == "like":
if user_id in likes:
likes.remove(user_id)
else:
likes.append(user_id)
if user_id in dislikes:
dislikes.remove(user_id)
elif reaction_type == "dislike":
if user_id in dislikes:
dislikes.remove(user_id)
else:
dislikes.append(user_id)
if user_id in likes:
likes.remove(user_id)
episode_reactions_collection.update_one(
{"anime_id": anime_id, "episode_number": int(episode_number)},
{"$set": {"likes": likes, "dislikes": dislikes}},
upsert=True,
)
return {
"like_count": len(likes),
"dislike_count": len(dislikes),
"user_liked": user_id in likes,
"user_disliked": user_id in dislikes,
}
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