saved_snippets: Add support for editing saved snippets.

Fixes #33708.

zerver/views/saved_snippets.py

@@ -2,15 +2,18 @@ from typing import Annotated
 
 from django.conf import settings
 from django.http import HttpRequest, HttpResponse
+from django.utils.translation import gettext as _
 from pydantic import StringConstraints
 
 from zerver.actions.saved_snippets import (
     do_create_saved_snippet,
     do_delete_saved_snippet,
+    do_edit_saved_snippet,
     do_get_saved_snippets,
 )
+from zerver.lib.exceptions import JsonableError
 from zerver.lib.response import json_success
-from zerver.lib.typed_endpoint import typed_endpoint
+from zerver.lib.typed_endpoint import PathOnly, typed_endpoint
 from zerver.models import SavedSnippet, UserProfile
 
 
@@ -45,6 +48,32 @@ def create_saved_snippet(
     return json_success(request, data={"saved_snippet_id": saved_snippet.id})
 
 
+@typed_endpoint
+def edit_saved_snippet(
+    request: HttpRequest,
+    user_profile: UserProfile,
+    *,
+    saved_snippet_id: PathOnly[int],
+    title: Annotated[
+        str | None,
+        StringConstraints(
+            min_length=1, max_length=SavedSnippet.MAX_TITLE_LENGTH, strip_whitespace=True
+        ),
+    ] = None,
+    content: Annotated[
+        str | None,
+        StringConstraints(
+            min_length=1, max_length=settings.MAX_MESSAGE_LENGTH, strip_whitespace=True
+        ),
+    ] = None,
+) -> HttpResponse:
+    if title is None and content is None:
+        raise JsonableError(_("No new data is supplied"))
+
+    do_edit_saved_snippet(saved_snippet_id, title, content, user_profile)
+    return json_success(request)
+
+
 def delete_saved_snippet(
     request: HttpRequest,
     user_profile: UserProfile,