Suggestions for issues (#32327)

closes #16872

web_src/js/features/comp/TextExpander.ts

@@ -1,5 +1,41 @@
-import {matchEmoji, matchMention} from '../../utils/match.ts';
+import {matchEmoji, matchMention, matchIssue} from '../../utils/match.ts';
 import {emojiString} from '../emoji.ts';
+import {svg} from '../../svg.ts';
+import {parseIssueHref} from '../../utils.ts';
+import {createElementFromAttrs, createElementFromHTML} from '../../utils/dom.ts';
+import {getIssueColor, getIssueIcon} from '../issue.ts';
+import {debounce} from 'perfect-debounce';
+
+const debouncedSuggestIssues = debounce((key: string, text: string) => new Promise<{matched:boolean; fragment?: HTMLElement}>(async (resolve) => {
+  const {owner, repo, index} = parseIssueHref(window.location.href);
+  const matches = await matchIssue(owner, repo, index, text);
+  if (!matches.length) return resolve({matched: false});
+
+  const ul = document.createElement('ul');
+  ul.classList.add('suggestions');
+  for (const issue of matches) {
+    const li = createElementFromAttrs('li', {
+      role: 'option',
+      'data-value': `${key}${issue.id}`,
+      class: 'tw-flex tw-gap-2',
+    });
+
+    const icon = svg(getIssueIcon(issue), 16, ['text', getIssueColor(issue)].join(' '));
+    li.append(createElementFromHTML(icon));
+
+    const id = document.createElement('span');
+    id.textContent = issue.id.toString();
+    li.append(id);
+
+    const nameSpan = document.createElement('span');
+    nameSpan.textContent = issue.title;
+    li.append(nameSpan);
+
+    ul.append(li);
+  }
+
+  resolve({matched: true, fragment: ul});
+}), 100);
 
 export function initTextExpander(expander) {
   expander?.addEventListener('text-expander-change', ({detail: {key, provide, text}}) => {
@@ -49,12 +85,14 @@ export function initTextExpander(expander) {
       }
 
       provide({matched: true, fragment: ul});
+    } else if (key === '#') {
+      provide(debouncedSuggestIssues(key, text));
     }
   });
   expander?.addEventListener('text-expander-value', ({detail}) => {
     if (detail?.item) {
-      // add a space after @mentions as it's likely the user wants one
-      const suffix = detail.key === '@' ? ' ' : '';
+      // add a space after @mentions and #issue as it's likely the user wants one
+      const suffix = ['@', '#'].includes(detail.key) ? ' ' : '';
       detail.value = `${detail.item.getAttribute('data-value')}${suffix}`;
     }
   });