api: Fix encoding of strings in streams endpoint.

* Remove unnecessary json_validator for string parameters.
* Update frontend to pass right parameter.

Bump api feature level and highlight the fix for `emojiset`
parameter of `settings/display` endpoint in zulip.yaml file.

Fixes part of #18035.

static/js/stream_edit.js

@@ -652,7 +652,7 @@ export function change_stream_name(e) {
     channel.patch({
         // Stream names might contain unsafe characters so we must encode it first.
         url: "/json/streams/" + stream_id,
-        data: {new_name: JSON.stringify(new_name)},
+        data: {new_name},
         success() {
             new_name_box.val("");
             ui_report.success(
@@ -705,7 +705,7 @@ export function change_stream_description(e) {
         // Description might contain unsafe characters so we must encode it first.
         url: "/json/streams/" + stream_id,
         data: {
-            description: JSON.stringify(description),
+            description,
         },
         success() {
             // The event from the server will update the rest of the UI

templates/zerver/api/changelog.md

@@ -10,6 +10,13 @@ below features are supported.
 
 ## Changes in Zulip 4.0
 
+**Feature level 64**
+
+* `PATCH /streams/{stream_id}`: Removed unnecessary JSON-encoding of string
+  parameters `new_name` and `description`.
+* `PATCH /settings/display`: Removed unnecessary JSON-encoding of string
+  parameters `default_view`, `emojiset` and `timezone`.
+
 **Feature level 63**
 
 * `PATCH /settings/notifications`: Removed unnecessary JSON-encoding of string

version.py

@@ -30,7 +30,7 @@ DESKTOP_WARNING_VERSION = "5.2.0"
 #
 # Changes should be accompanied by documentation explaining what the
 # new level means in templates/zerver/api/changelog.md.
-API_FEATURE_LEVEL = 63
+API_FEATURE_LEVEL = 64
 
 # Bump the minor PROVISION_VERSION to indicate that folks should provision
 # only when going from an old version of the code to a newer version. Bump

zerver/openapi/zulip.yaml

@@ -9323,11 +9323,11 @@ paths:
           in: query
           description: |
             Notification sound name.
-          content:
-            application/json:
-              schema:
-                type: string
-              example: ding
+
+            **Changes**: Removed unnecessary JSON-encoding of parameter in Zulip 4.0 (feature level 63).
+          schema:
+            type: string
+          example: ding
         - name: enable_desktop_notifications
           in: query
           description: |
@@ -9598,12 +9598,12 @@ paths:
             This controls both the Zulip UI as well as email notifications sent to the user.
 
             The value needs to be a standard language code that the Zulip server has
-            translation data for; for example, `"en"` for English` or `"de"` for German.
-          content:
-            application/json:
-              schema:
-                type: string
-              example: "en"
+            translation data for; for example, `"en"` for English or `"de"` for German.
+
+            **Changes**: Removed unnecessary JSON-encoding of parameter in Zulip 4.0 (feature level 63).
+          schema:
+            type: string
+          example: en
         - name: default_view
           in: query
           description: |
@@ -9612,9 +9612,11 @@ paths:
 
             * "recent_topics" - Recent topics view
             * "all_messages" - All messages view
+
+            **Changes**: Removed unnecessary JSON-encoding of parameter in Zulip 4.0 (feature level 64).
           schema:
             type: string
-          example: '"all_messages"'
+          example: all_messages
         - name: left_side_userlist
           in: query
           description: |
@@ -9634,6 +9636,8 @@ paths:
             * "google-blob" - Google classic
             * "twitter" - Twitter
             * "text" - Plain text
+
+            **Changes**: Removed unnecessary JSON-encoding of parameter in Zulip 4.0 (feature level 64).
           schema:
             type: string
           example: "google"
@@ -9661,11 +9665,11 @@ paths:
 
             Timezone values supported by the server are served at
             [/static/generated/timezones.json](/static/generated/timezones.json).
-          content:
-            application/json:
-              schema:
-                type: string
-              example: "Asia/Kolkata"
+
+            **Changes**: Removed unnecessary JSON-encoding of parameter in Zulip 4.0 (feature level 64).
+          schema:
+            type: string
+          example: "Asia/Kolkata"
       responses:
         "200":
           description: Success
@@ -9950,22 +9954,25 @@ paths:
         - name: description
           in: query
           description: |
-            The new description for the stream.
-          content:
-            application/json:
-              schema:
-                type: string
-              example: This stream is related to football dicsussions.
+            The new description for the stream. Limited Zulip markdown is allowed in this
+            field.
+
+            **Changes**: Removed unnecessary JSON-encoding of this parameter in
+            Zulip 4.0 (feature level 64).
+          schema:
+            type: string
+          example: "Discuss Italian history and travel destinations."
           required: false
         - name: new_name
           in: query
           description: |
             The new name for the stream.
-          content:
-            application/json:
-              schema:
-                type: string
-              example: Italy
+
+            **Changes**: Removed unnecessary JSON-encoding of this parameter in
+            Zulip 4.0 (feature level 64).
+          schema:
+            type: string
+          example: Italy
           required: false
         - name: is_private
           in: query

zerver/tests/test_subs.py

@@ -759,31 +759,21 @@ class StreamAdminTest(ZulipTestCase):
         stream = self.subscribe(user_profile, "stream_name1")
         do_change_user_role(user_profile, UserProfile.ROLE_REALM_ADMINISTRATOR, acting_user=None)
 
-        result = self.client_patch(
-            f"/json/streams/{stream.id}", {"new_name": orjson.dumps("stream_name1").decode()}
-        )
+        result = self.client_patch(f"/json/streams/{stream.id}", {"new_name": "stream_name1"})
         self.assert_json_error(result, "Stream already has that name!")
-        result = self.client_patch(
-            f"/json/streams/{stream.id}", {"new_name": orjson.dumps("Denmark").decode()}
-        )
+        result = self.client_patch(f"/json/streams/{stream.id}", {"new_name": "Denmark"})
         self.assert_json_error(result, "Stream name 'Denmark' is already taken.")
-        result = self.client_patch(
-            f"/json/streams/{stream.id}", {"new_name": orjson.dumps("denmark ").decode()}
-        )
+        result = self.client_patch(f"/json/streams/{stream.id}", {"new_name": "denmark "})
         self.assert_json_error(result, "Stream name 'denmark' is already taken.")
 
         # Do a rename that is case-only--this should succeed.
-        result = self.client_patch(
-            f"/json/streams/{stream.id}", {"new_name": orjson.dumps("sTREAm_name1").decode()}
-        )
+        result = self.client_patch(f"/json/streams/{stream.id}", {"new_name": "sTREAm_name1"})
         self.assert_json_success(result)
 
         events: List[Mapping[str, Any]] = []
         with tornado_redirected_to_list(events):
             stream_id = get_stream("stream_name1", user_profile.realm).id
-            result = self.client_patch(
-                f"/json/streams/{stream_id}", {"new_name": orjson.dumps("stream_name2").decode()}
-            )
+            result = self.client_patch(f"/json/streams/{stream_id}", {"new_name": "stream_name2"})
         self.assert_json_success(result)
         event = events[1]["event"]
         self.assertEqual(
@@ -813,9 +803,7 @@ class StreamAdminTest(ZulipTestCase):
         # *NOTE: Here encoding is needed when Unicode string is passed as an argument*
         with tornado_redirected_to_list(events):
             stream_id = stream_name2_exists.id
-            result = self.client_patch(
-                f"/json/streams/{stream_id}", {"new_name": orjson.dumps("नया नाम").decode()}
-            )
+            result = self.client_patch(f"/json/streams/{stream_id}", {"new_name": "नया नाम"})
         self.assert_json_success(result)
         # While querying, system can handle Unicode strings.
         stream_name_uni_exists = get_stream("नया नाम", realm)
@@ -828,7 +816,7 @@ class StreamAdminTest(ZulipTestCase):
             stream_id = stream_name_uni_exists.id
             result = self.client_patch(
                 f"/json/streams/{stream_id}",
-                {"new_name": orjson.dumps("नाम में क्या रक्खा हे").decode()},
+                {"new_name": "नाम में क्या रक्खा हे"},
             )
         self.assert_json_success(result)
         # While querying, system can handle Unicode strings.
@@ -840,9 +828,7 @@ class StreamAdminTest(ZulipTestCase):
         # Test case to change name from one language to other.
         with tornado_redirected_to_list(events):
             stream_id = stream_name_new_uni_exists.id
-            result = self.client_patch(
-                f"/json/streams/{stream_id}", {"new_name": orjson.dumps("français").decode()}
-            )
+            result = self.client_patch(f"/json/streams/{stream_id}", {"new_name": "français"})
         self.assert_json_success(result)
         stream_name_fr_exists = get_stream("français", realm)
         self.assertTrue(stream_name_fr_exists)
@@ -850,9 +836,7 @@ class StreamAdminTest(ZulipTestCase):
         # Test case to change name to mixed language name.
         with tornado_redirected_to_list(events):
             stream_id = stream_name_fr_exists.id
-            result = self.client_patch(
-                f"/json/streams/{stream_id}", {"new_name": orjson.dumps("français name").decode()}
-            )
+            result = self.client_patch(f"/json/streams/{stream_id}", {"new_name": "français name"})
         self.assert_json_success(result)
         stream_name_mixed_exists = get_stream("français name", realm)
         self.assertTrue(stream_name_mixed_exists)
@@ -867,7 +851,7 @@ class StreamAdminTest(ZulipTestCase):
             stream_id = get_stream("stream_private_name1", realm).id
             result = self.client_patch(
                 f"/json/streams/{stream_id}",
-                {"new_name": orjson.dumps("stream_private_name2").decode()},
+                {"new_name": "stream_private_name2"},
             )
         self.assert_json_success(result)
         notified_user_ids = set(events[1]["users"])
@@ -896,7 +880,7 @@ class StreamAdminTest(ZulipTestCase):
         with tornado_redirected_to_list(events):
             result = self.client_patch(
                 f"/json/streams/{new_stream.id}",
-                {"new_name": orjson.dumps("stream_rename").decode()},
+                {"new_name": "stream_rename"},
             )
         self.assert_json_success(result)
         self.assertEqual(len(events), 3)
@@ -914,9 +898,7 @@ class StreamAdminTest(ZulipTestCase):
         self.assertFalse(sub.is_stream_admin)
 
         stream_id = get_stream("stream_name1", user_profile.realm).id
-        result = self.client_patch(
-            f"/json/streams/{stream_id}", {"new_name": orjson.dumps("stream_name2").decode()}
-        )
+        result = self.client_patch(f"/json/streams/{stream_id}", {"new_name": "stream_name2"})
         self.assert_json_error(result, "Must be an organization or stream administrator")
 
     def test_notify_on_stream_rename(self) -> None:
@@ -926,9 +908,7 @@ class StreamAdminTest(ZulipTestCase):
 
         stream = self.subscribe(user_profile, "stream_name1")
         do_change_user_role(user_profile, UserProfile.ROLE_REALM_ADMINISTRATOR, acting_user=None)
-        result = self.client_patch(
-            f"/json/streams/{stream.id}", {"new_name": orjson.dumps("stream_name2").decode()}
-        )
+        result = self.client_patch(f"/json/streams/{stream.id}", {"new_name": "stream_name2"})
         self.assert_json_success(result)
 
         # Inspect the notification message sent
@@ -956,9 +936,7 @@ class StreamAdminTest(ZulipTestCase):
         self.assert_json_success(result)
 
         stream_id = get_stream("private_stream", iago.realm).id
-        result = self.client_patch(
-            f"/json/streams/{stream_id}", {"new_name": orjson.dumps("new_private_stream").decode()}
-        )
+        result = self.client_patch(f"/json/streams/{stream_id}", {"new_name": "new_private_stream"})
         self.assert_json_success(result)
 
         result = self.client_patch(
@@ -992,9 +970,7 @@ class StreamAdminTest(ZulipTestCase):
 
         stream_id = get_stream("private_stream_1", hamlet.realm).id
 
-        result = self.client_patch(
-            f"/json/streams/{stream_id}", {"new_name": orjson.dumps("private_stream_2").decode()}
-        )
+        result = self.client_patch(f"/json/streams/{stream_id}", {"new_name": "private_stream_2"})
         self.assert_json_error(result, "Invalid stream id")
 
         result = self.client_patch(

zerver/views/streams.py

@@ -244,7 +244,7 @@ def update_stream_backend(
     user_profile: UserProfile,
     stream_id: int,
     description: Optional[str] = REQ(
-        json_validator=check_capped_string(Stream.MAX_DESCRIPTION_LENGTH), default=None
+        str_validator=check_capped_string(Stream.MAX_DESCRIPTION_LENGTH), default=None
     ),
     is_private: Optional[bool] = REQ(json_validator=check_bool, default=None),
     is_announcement_only: Optional[bool] = REQ(json_validator=check_bool, default=None),
@@ -252,7 +252,7 @@ def update_stream_backend(
         json_validator=check_int_in(Stream.STREAM_POST_POLICY_TYPES), default=None
     ),
     history_public_to_subscribers: Optional[bool] = REQ(json_validator=check_bool, default=None),
-    new_name: Optional[str] = REQ(json_validator=check_string, default=None),
+    new_name: Optional[str] = REQ(default=None),
     message_retention_days: Optional[Union[int, str]] = REQ(
         json_validator=check_string_or_int, default=None
     ),