core: lang: add disabled option

packages/hydrooj/src/handler/problem.ts

@@ -507,7 +507,7 @@ export class ProblemSubmitHandler extends ProblemDetailHandler {
         if (typeof config === 'string' || config === null) throw new ProblemConfigError();
         if (config.type === 'objective') {
             lang = '_';
-        } else if (config.langs && !config.langs.includes(lang)) {
+        } else if ((config.langs && !config.langs.includes(lang)) || setting.langs[lang].disabled) {
             throw new ProblemNotAllowLanguageError();
         }
         if (pretest) {

packages/ui-default/utils/index.ts

@@ -33,7 +33,8 @@ export function getAvailableLangs(langsList?: string[]) {
   for (const key in window.LANGS) {
     if (prefixes.has(key)) continue;
     if (langsList && langsList.length && langsList.join('') && !langsList.includes(key)) continue;
-    else if (window.LANGS[key].hidden && !langsList?.includes(key)) continue;
+    if (window.LANGS[key].hidden && !langsList?.includes(key)) continue;
+    if (window.LANGS[key].disabled) continue;
     Langs[key] = window.LANGS[key];
   }
   return Langs;

packages/utils/lib/lang.ts

@@ -1,6 +1,7 @@
 import yaml from 'js-yaml';
 
 export interface LangConfig {
+    disabled?: boolean;
     compile?: string;
     execute: string;
     code_file: string;
@@ -41,6 +42,7 @@ export function parseLang(config: string): Record<string, LangConfig> {
         entry.execute ||= '/w/foo';
         entry.key = key;
         entry.hidden ||= false;
+        entry.disabled ||= false;
     }
     return file;
 }