Dataを作成

.github/workflows/fetch.json.yml

@@ -0,0 +1,46 @@
+name: Update AtCoder Problems JSON
+
+on:
+  schedule:
+    # 毎週水曜 0:00 UTC（日本時間 9:00）
+    - cron: "0 0 * * 3"
+  workflow_dispatch: # 手動実行も可能
+
+permissions:
+  contents: write # push 権限が必要
+
+jobs:
+  update-json:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: 22
+
+      - name: Install dependencies
+        run: npm install
+        working-directory: data
+
+      - name: Run fetch-json script
+        run: node data/fetch-json.mjs
+        working-directory: data
+
+      - name: Commit changes if updated
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git add data/problems.json data/problem_models.json
+          if git diff --cached --quiet; then
+            echo "No changes in JSON files"
+          else
+            git commit -m "chore: update problems.json and problem_models.json"
+            git push
+          fi
+        working-directory: data

backend/src/api/mod.rs

@@ -30,10 +30,10 @@ fn adjust_difficulty(difficulty: Option<i32>) -> Option<f64> {
 pub async fn fetch_problem() -> Result<(Vec<Problem>, HashMap<String, ProblemModel>), Box<dyn Error + Send + Sync>> {
     // カレントディレクトリ基準で src/data を指す
     let mut problems_path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
-    problems_path.push("src/data/problems.json");
+    problems_path.push("../data/problems.json");
 
     let mut problem_models_path = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
-    problem_models_path.push("src/data/problem-models.json");
+    problem_models_path.push("../data/problem-models.json");
 
     // ファイル読み込み
     let problems_text = fs::read_to_string(problems_path)?;

data/json_fetch.mjs

@@ -0,0 +1,37 @@
+import { mkdir, writeFile, access } from "node:fs/promises";
+import { constants } from "node:fs";
+
+const DATA_DIR = "."; // 保存先ディレクトリ
+const UA = "Mozilla/5.0 (atrp-updater; +https://example.com)";
+
+const endpoints = [
+  ["problems.json", "https://kenkoooo.com/atcoder/resources/problems.json"],
+  ["problem_models.json", "https://kenkoooo.com/atcoder/resources/problem-models.json"],
+];
+
+async function ensureDir(dir) {
+  try {
+    await access(dir, constants.F_OK);
+  } catch {
+    await mkdir(dir, { recursive: true });
+  }
+}
+
+async function download([filename, url]) {
+  const res = await fetch(url, { headers: { "User-Agent": UA } });
+  if (!res.ok) {
+    throw new Error(`HTTP ${res.status} for ${url}`);
+  }
+
+  const arrBuf = await res.arrayBuffer();
+  const buf = Buffer.from(arrBuf);
+  await writeFile(`${DATA_DIR}/${filename}`, buf);
+  console.log(`Saved: ${DATA_DIR}/${filename}`);
+}
+
+(async () => {
+  await ensureDir(DATA_DIR);
+  for (const ep of endpoints) {
+    await download(ep);
+  }
+})();