fix: integrate community bugfixes for PRs 1, 4, 6 and Issue 7

- Fix zhihu id truncation issue beyond safe integer
- Add json filter to template engine
- Escape evaluate args in browser scripts using json filter
- Resolve module not found bug for index.ts

Co-authored-by: 袁鑫 <eric.yuanxin@gmail.com>
Co-authored-by: zhenxing jiang <jiangzhx@gmail.com>
Co-authored-by: wangruotian <wangruotian@meituan.com>
Co-authored-by: 滕文证 <83223457+tenwz@users.noreply.github.com>

src/clis/reddit/hot.yaml

@@ -18,9 +18,10 @@ pipeline:
 
   - evaluate: |
       (async () => {
-        const sub = '${{ args.subreddit }}';
+        const sub = ${{ args.subreddit | json }};
         const path = sub ? '/r/' + sub + '/hot.json' : '/hot.json';
-        const res = await fetch(path + '?limit=${{ args.limit }}&raw_json=1', {
+        const limit = ${{ args.limit }};
+        const res = await fetch(path + '?limit=' + limit + '&raw_json=1', {
           credentials: 'include'
         });
         const d = await res.json();

src/clis/zhihu/hot.yaml

@@ -17,12 +17,16 @@ pipeline:
         const res = await fetch('https://www.zhihu.com/api/v3/feed/topstory/hot-lists/total?limit=50', {
           credentials: 'include'
         });
-        const d = await res.json();
+        const text = await res.text();
+        const d = JSON.parse(
+          text.replace(/("id"\s*:\s*)(\d{16,})/g, '$1"$2"')
+        );
         return (d?.data || []).map((item) => {
           const t = item.target || {};
+          const questionId = t.id == null ? '' : String(t.id);
           return {
             title: t.title,
-            url: 'https://www.zhihu.com/question/' + t.id,
+            url: 'https://www.zhihu.com/question/' + questionId,
             answer_count: t.answer_count,
             follower_count: t.follower_count,
             heat: item.detail_text || '',

src/clis/zhihu/search.yaml

@@ -19,7 +19,9 @@ pipeline:
   - evaluate: |
       (async () => {
         const strip = (html) => (html || '').replace(/<[^>]+>/g, '').replace(/&nbsp;/g, ' ').replace(/&lt;/g, '<').replace(/&gt;/g, '>').replace(/&amp;/g, '&').replace(/<em>/g, '').replace(/<\/em>/g, '').trim();
-        const res = await fetch('https://www.zhihu.com/api/v4/search_v3?q=' + encodeURIComponent('${{ args.keyword }}') + '&t=general&offset=0&limit=${{ args.limit }}', {
+        const keyword = ${{ args.keyword | json }};
+        const limit = ${{ args.limit }};
+        const res = await fetch('https://www.zhihu.com/api/v4/search_v3?q=' + encodeURIComponent(keyword) + '&t=general&offset=0&limit=' + limit, {
           credentials: 'include'
         });
         const d = await res.json();

src/pipeline/template.test.ts

@@ -75,6 +75,12 @@ describe('evalExpr', () => {
   it('applies length filter', () => {
     expect(evalExpr('item.items | length', { item: { items: [1, 2, 3] } })).toBe(3);
   });
+  it('applies json filter to strings with quotes', () => {
+    expect(evalExpr('args.keyword | json', { args: { keyword: "O'Reilly" } })).toBe('"O\'Reilly"');
+  });
+  it('applies json filter to nullish values', () => {
+    expect(evalExpr('args.keyword | json', { args: {} })).toBe('null');
+  });
 });
 
 describe('render', () => {

src/pipeline/template.ts

@@ -75,7 +75,7 @@ export function evalExpr(expr: string, ctx: RenderContext): any {
  * Apply a named filter to a value.
  * Supported filters:
  *   default(val), join(sep), upper, lower, truncate(n), trim,
- *   replace(old,new), keys, length, first, last
+ *   replace(old,new), keys, length, first, last, json
  */
 function applyFilter(filterExpr: string, value: any): any {
   const match = filterExpr.match(/^(\w+)(?:\((.+)\))?$/);
@@ -117,6 +117,8 @@ function applyFilter(filterExpr: string, value: any): any {
       return Array.isArray(value) ? value[0] : value;
     case 'last':
       return Array.isArray(value) ? value[value.length - 1] : value;
+    case 'json':
+      return JSON.stringify(value ?? null);
     default:
       return value;
   }