add theme

themes/butterfly/scripts/common/postDesc.js

@@ -0,0 +1,37 @@
+'use strict'
+
+const { stripHTML, truncate } = require('hexo-util')
+
+// Truncates the given content to a specified length, removing HTML tags and replacing newlines with spaces.
+const truncateContent = (content, length, encrypt = false) => {
+  if (!content || encrypt) return ''
+  return truncate(stripHTML(content).replace(/\n/g, ' '), { length })
+}
+
+// Generates a post description based on the provided data and theme configuration.
+const postDesc = (data, hexo) => {
+  const { description, content, postDesc, encrypt } = data
+
+  if (postDesc) return postDesc
+
+  const { length, method } = hexo.theme.config.index_post_content
+
+  if (method === false) return
+
+  let result
+  switch (method) {
+    case 1:
+      result = description
+      break
+    case 2:
+      result = description || truncateContent(content, length, encrypt)
+      break
+    default:
+      result = truncateContent(content, length, encrypt)
+  }
+
+  data.postDesc = result
+  return result
+}
+
+module.exports = { truncateContent, postDesc }