relay/api: add field "hidden" in GET /api/buffers (issue #2159)

src/plugins/relay/api/relay-api-msg.c

@@ -380,6 +380,7 @@ relay_api_msg_buffer_to_json (struct t_gui_buffer *buffer,
     if (weechat_strcmp (ptr_string, "free") == 0)
         lines = lines_free;
     MSG_ADD_STR_PTR("type", ptr_string);
+    MSG_ADD_HDATA_VAR(Bool, "hidden", integer, "hidden");
     MSG_ADD_HDATA_STR_COLORS("title", "title");
     MSG_ADD_HDATA_STR_COLORS("modes", "modes");
     MSG_ADD_HDATA_STR_COLORS("input_prompt", "input_prompt");

src/plugins/relay/api/weechat-relay-api.yaml

@@ -592,6 +592,10 @@ components:
             - free
           description: the buffer type
           example: formatted
+        hidden:
+          type: boolean
+          description: buffer is hidden
+          example: false
         title:
           type: string
           description: the buffer title (can contain colors)
@@ -656,6 +660,7 @@ components:
         - short_name
         - number
         - type
+        - hidden
         - title
         - modes
         - input_prompt