From cd9b9fd31fffaf6a27305b9cdb86f1bb98b38b89 Mon Sep 17 00:00:00 2001
From: dousha <lijiahao34@live.com>
Date: Mon, 20 Sep 2021 14:05:00 +0800
Subject: [PATCH] Remember preferred programming language

---
 src/pages/oj/views/problem/Problem.vue | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/pages/oj/views/problem/Problem.vue b/src/pages/oj/views/problem/Problem.vue
index 30a03d49e..6c87452d4 100644
--- a/src/pages/oj/views/problem/Problem.vue
+++ b/src/pages/oj/views/problem/Problem.vue
@@ -298,7 +298,18 @@
             return
           }
           // try to load problem template
-          this.language = this.problem.languages[0]
+          if (window.localStorage) {
+            const preferredLanguage = window.localStorage.getItem('preferredLang')
+            if (preferredLanguage) {
+              if (this.problem.languages.indexOf(preferredLanguage) >= 0) {
+                this.language = preferredLanguage
+              } else {
+                this.language = this.problem.languages[0]
+              }
+            }
+          } else {
+            this.language = this.problem.languages[0]
+          }
           let template = this.problem.template
           if (template && template[this.language]) {
             this.code = template[this.language]
@@ -353,6 +364,9 @@
           }
         }
         this.language = newLang
+        if (window.localStorage) {
+          window.localStorage.setItem('preferredLang', newLang)
+        }
       },
       onChangeTheme (newTheme) {
         this.theme = newTheme