fix: handle non-string values in flink tag escaping

Co-authored-by: jerryc127 <16351105+jerryc127@users.noreply.github.com>

scripts/tag/flink.js

@@ -6,23 +6,24 @@
 
 const { url_for, escapeHTML } = require('hexo-util')
 const urlFor = url_for.bind(hexo)
+const safeEscape = value => escapeHTML(value == null ? '' : String(value))
 
 const flinkFn = (args, content) => {
   const data = hexo.render.renderSync({ text: content, engine: 'yaml' })
   let result = ''
 
   data.forEach(item => {
-    const className = item.class_name ? `<div class="flink-name">${escapeHTML(item.class_name)}</div>` : ''
-    const classDesc = item.class_desc ? `<div class="flink-desc">${escapeHTML(item.class_desc)}</div>` : ''
+    const className = item.class_name ? `<div class="flink-name">${safeEscape(item.class_name)}</div>` : ''
+    const classDesc = item.class_desc ? `<div class="flink-desc">${safeEscape(item.class_desc)}</div>` : ''
 
     const listResult = item.link_list.map(link => `
       <div class="flink-list-item">
-        <a href="${escapeHTML(link.link)}" title="${escapeHTML(link.name)}" target="_blank">
+        <a href="${safeEscape(link.link)}" title="${safeEscape(link.name)}" target="_blank">
           <div class="flink-item-icon">
-            <img class="no-lightbox" src="${escapeHTML(link.avatar)}" onerror='this.onerror=null;this.src="${urlFor(hexo.theme.config.error_img.flink)}"' alt="${escapeHTML(link.name)}" />
+            <img class="no-lightbox" src="${safeEscape(link.avatar)}" onerror='this.onerror=null;this.src="${urlFor(hexo.theme.config.error_img.flink)}"' alt="${safeEscape(link.name)}" />
           </div>
-          <div class="flink-item-name">${escapeHTML(link.name)}</div>
-          <div class="flink-item-desc" title="${escapeHTML(link.descr)}">${escapeHTML(link.descr)}</div>
+          <div class="flink-item-name">${safeEscape(link.name)}</div>
+          <div class="flink-item-desc" title="${safeEscape(link.descr)}">${safeEscape(link.descr)}</div>
         </a>
       </div>`).join('')