core&ui: enhanced language selection (#390)

packages/hydrooj/package.json

@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "3.14.14",
+    "version": "3.14.15",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",

packages/hydrooj/src/handler/problem.ts

@@ -324,16 +324,19 @@ export class ProblemDetailHandler extends ContestDetailBaseHandler {
             this.pdoc.config = pdoc.config;
         }
         if (typeof this.pdoc.config !== 'string') {
+            let baseLangs;
+            if (this.pdoc.config.type === 'remote_judge') {
+                const p = this.pdoc.config.subType;
+                const dl = [p, ...Object.keys(setting.langs).filter((i) => i.startsWith(`${p}.`))];
+                baseLangs = dl;
+            } else {
+                baseLangs = Object.keys(setting.langs).filter((i) => !setting.langs[i].remote);
+            }
             const t = [];
             if (this.pdoc.config.langs) t.push(this.pdoc.config.langs);
             if (ddoc.langs) t.push(ddoc.langs.split(',').map((i) => i.trim()).filter((i) => i));
             if (this.domain.langs) t.push(this.domain.langs.split(',').map((i) => i.trim()).filter((i) => i));
-            if (this.pdoc.config.type === 'remote_judge') {
+            if (t.length) this.pdoc.config.langs = intersection(baseLangs, ...t);
-                const p = this.pdoc.config.subType;
-                const dl = [p, ...Object.keys(setting.langs).filter((i) => i.startsWith(`${p}.`))];
-                t.push(dl);
-            }
-            if (t.length) this.pdoc.config.langs = intersection(...t);
         }
         await bus.serial('problem/get', this.pdoc, this);
         [this.psdoc, this.udoc] = await Promise.all([

packages/ui-default/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@hydrooj/ui-default",
-  "version": "4.38.15",
+  "version": "4.38.16",
   "author": "undefined <i@undefined.moe>",
   "license": "AGPL-3.0",
   "main": "hydro.js",

packages/ui-default/pages/problem_submit.page.tsx

@@ -56,6 +56,7 @@ const page = new NamedPage(['problem_submit', 'contest_detail_problem_submit', '
 
     return (
       <>
+        {Object.keys(mainLangs).length > 1 && (
           <div className="medium-5 columns form__item end">
             <label>
               {i18n('Code language')}
@@ -68,7 +69,8 @@ const page = new NamedPage(['problem_submit', 'contest_detail_problem_submit', '
               </div>
             </label>
           </div>
-        {Object.keys(options).length > 1 && (
+        )}
+        {(Object.keys(options).length > 1 || Object.keys(mainLangs).length === 1) && (
           <div className="medium-5 columns form__item end">
             <label>
               {i18n('Code language')}