feat: choose initial owner during issue filing

src/gitea_proxy.py

@@ -1452,8 +1452,10 @@ async def create_issue(
         for item in assignees
         if isinstance(item, dict) and isinstance(item.get("login"), str)
     ]
-    if assignee not in confirmed_assignees:
-        raise ValueError("Gitea did not confirm issue self-assignment")
+    if confirmed_assignees != [assignee]:
+        raise ValueError(
+            "Gitea did not confirm self-assignment or exact issue assignment"
+        )
     labels_value = issue.get("labels")
     labels = labels_value if isinstance(labels_value, list) else []
     milestone_value = issue.get("milestone")

src/main.py

@@ -714,6 +714,9 @@ def _validate_binary_attachment(filename: str, content_type: str, content: bytes
 class IssueCreation(BaseModel):
     title: str = Field(min_length=1, max_length=255)
     body: str = Field(default="", max_length=10_000)
+    assignee: str | None = Field(
+        default=None, pattern=r"^[A-Za-z0-9_.-]+$", max_length=255
+    )
     label_ids: list[int] = Field(default_factory=list, max_length=20)
     milestone_id: PositiveInt | None = None
     due_date: str | None = Field(
@@ -4525,6 +4528,36 @@ async def repository_labels(owner: str, repo: str):
         )
 
 
+@app.get("/api/v1/repos/{owner}/{repo}/issue-assignees")
+async def repository_issue_assignees(owner: str, repo: str):
+    repository = f"{owner}/{repo}"
+
+    async def load_assignees():
+        if await gitea_proxy.repository_access(repository) is None:
+            raise HTTPException(status_code=404, detail="Repository not found")
+        candidates = [
+            item
+            for item in await gitea_proxy.issue_handoff_candidates(repository)
+            if isinstance(item, dict)
+            and isinstance(item.get("login"), str)
+            and re.fullmatch(r"[A-Za-z0-9_.-]+", item["login"])
+        ][:25]
+        return JSONResponse(candidates, headers={"Cache-Control": "no-store"})
+
+    try:
+        return await asyncio.wait_for(
+            load_assignees(), timeout=ISSUE_ACTION_TIMEOUT_SECONDS
+        )
+    except HTTPException:
+        raise
+    except Exception:
+        return JSONResponse(
+            {"error": "Owners could not be loaded. You can still assign the issue to yourself."},
+            status_code=503,
+            headers={"Retry-After": "1"},
+        )
+
+
 @app.post("/api/v1/repos/{owner}/{repo}/issues", status_code=201)
 async def create_assigned_issue(
     creation: IssueCreation,
@@ -4541,6 +4574,17 @@ async def create_assigned_issue(
         login = user.get("login") if isinstance(user, dict) else None
         if not login or accessible is None:
             raise HTTPException(status_code=404, detail="Repository not found")
+        assignee = login
+        if creation.assignee and creation.assignee != login:
+            eligible = {
+                item["login"]
+                for item in await gitea_proxy.issue_handoff_candidates(repository)
+            }
+            if creation.assignee not in eligible:
+                raise HTTPException(
+                    status_code=422, detail="Selected owner is no longer eligible"
+                )
+            assignee = creation.assignee
         if creation.label_ids:
             available_labels = await gitea_proxy.repo_labels(repository)
             valid_label_ids = {
@@ -4566,13 +4610,13 @@ async def create_assigned_issue(
                 repository,
                 creation.title,
                 creation.body,
-                login,
+                assignee,
                 creation.label_ids,
                 creation.milestone_id,
                 creation.due_date,
             )
         return await gitea_proxy.create_issue(
-            repository, creation.title, creation.body, login, creation.label_ids
+            repository, creation.title, creation.body, assignee, creation.label_ids
         )
 
     try:
@@ -4584,6 +4628,7 @@ async def create_assigned_issue(
                 repository,
                 creation.title,
                 creation.body,
+                creation.assignee,
                 tuple(creation.label_ids),
                 creation.milestone_id,
                 creation.due_date,