fix(chat): support body and content fields in world and DM chat messages; feat(audio): add sound toggle switch and mute controls

backend/app/routers/chat_dm.py

@@ -71,7 +71,7 @@ from datetime import datetime, timezone
 from typing import Annotated
 
 from fastapi import APIRouter, Depends, HTTPException, Query, status
-from pydantic import BaseModel, Field
+from pydantic import BaseModel, Field, computed_field, model_validator
 from sqlalchemy import and_, func, or_, select
 from sqlalchemy.ext.asyncio import AsyncSession
 
@@ -97,7 +97,33 @@ _BODY_MAX_LEN = 4000
 
 
 class SendDMRequest(BaseModel):
-    body: str = Field(..., min_length=1, max_length=_BODY_MAX_LEN)
+    body: str | None = Field(default=None, max_length=_BODY_MAX_LEN)
+    content: str | None = Field(default=None, max_length=_BODY_MAX_LEN)
+
+    @model_validator(mode="before")
+    @classmethod
+    def resolve_body_or_content(cls, data: object) -> object:
+        if isinstance(data, dict):
+            if not data.get("body") and data.get("content"):
+                data["body"] = data["content"]
+            elif not data.get("content") and data.get("body"):
+                data["content"] = data["body"]
+        return data
+
+    @model_validator(mode="after")
+    def check_non_empty(self) -> SendDMRequest:
+        text = self.body or self.content
+        if not text or len(text.strip()) < 1:
+            raise ValueError("Message body or content must not be empty")
+        if not self.body:
+            self.body = text
+        if not self.content:
+            self.content = text
+        return self
+
+
+class StartConversationRequest(BaseModel):
+    target_user_id: int
 
 
 class DMMessageResponse(BaseModel):
@@ -111,6 +137,11 @@ class DMMessageResponse(BaseModel):
 
     model_config = {"from_attributes": True}
 
+    @computed_field
+    @property
+    def content(self) -> str:
+        return self.body
+
 
 class DMMessageListResponse(BaseModel):
     messages: list[DMMessageResponse]
@@ -397,3 +428,65 @@ async def list_conversations(
         )
 
     return DMConversationListResponse(conversations=summaries, total=total)
+@router.post("/conversations")
+async def start_or_get_conversation_endpoint(
+    body: StartConversationRequest,
+    current_user: CurrentUser,
+    db: DbDep,
+):
+    """Start or get existing conversation with target_user_id."""
+    if body.target_user_id == current_user.id:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST, detail="Cannot start a conversation with yourself"
+        )
+    await _get_target_user(db, body.target_user_id)
+    conversation = await _get_or_create_conversation(db, current_user.id, body.target_user_id)
+    return {"id": conversation.id, "target_user_id": body.target_user_id}
+
+
+@router.get("/conversations/{conversation_id}/messages", response_model=DMMessageListResponse)
+async def get_dm_conversation_history(
+    conversation_id: int,
+    current_user: CurrentUser,
+    db: DbDep,
+    limit: int = Query(50, ge=1, le=100),
+    before: int | None = Query(None),
+):
+    """Get messages for a conversation by conversation_id."""
+    conv_result = await db.execute(
+        select(Conversation).where(
+            Conversation.id == conversation_id,
+            or_(Conversation.user_a_id == current_user.id, Conversation.user_b_id == current_user.id),
+        )
+    )
+    conversation = conv_result.scalar_one_or_none()
+    if conversation is None:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Conversation not found")
+    peer_id = _peer_id(conversation, current_user.id)
+    return await get_dm_history(peer_id, current_user, db, limit=limit, before=before)
+
+
+@router.post(
+    "/conversations/{conversation_id}/messages",
+    response_model=DMMessageResponse,
+    status_code=status.HTTP_201_CREATED,
+    dependencies=[Depends(chat_dm_send_rate_limit)],
+)
+async def send_dm_to_conversation(
+    conversation_id: int,
+    body: SendDMRequest,
+    current_user: CurrentUser,
+    db: DbDep,
+):
+    """Send a message to a conversation by conversation_id."""
+    conv_result = await db.execute(
+        select(Conversation).where(
+            Conversation.id == conversation_id,
+            or_(Conversation.user_a_id == current_user.id, Conversation.user_b_id == current_user.id),
+        )
+    )
+    conversation = conv_result.scalar_one_or_none()
+    if conversation is None:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Conversation not found")
+    peer_id = _peer_id(conversation, current_user.id)
+    return await send_dm(peer_id, body, current_user, db)