shudao-main/shudao-vue-frontend/src/utils/aiWritingContent.js

function stripCodeFences(content) {
  return String(content || '')
    .replace(/```(?:html)?\s*/gi, '')
    .replace(/```/g, '')
    .trim()
}

function escapeHtml(content) {
  return String(content || '')
    .replace(/&/g, '&')
    .replace(/</g, '&lt;')
    .replace(/>/g, '&gt;')
    .replace(/"/g, '&quot;')
    .replace(/'/g, '&#39;')
}

function plainTextToHtml(content) {
  return String(content || '')
    .split(/\n{2,}/)
    .map(part => part.trim())
    .filter(Boolean)
    .map(part => `<p>${escapeHtml(part).replace(/\n/g, '<br>')}</p>`)
    .join('')
}

export function prepareAIWritingEditorHtml(content) {
  let html = stripCodeFences(content)
  if (!html) return ''

  const bodyMatch = html.match(/<body[^>]*>([\s\S]*?)<\/body>/i)
  if (bodyMatch) {
    html = bodyMatch[1].trim()
  }

  const firstContentTag = html.search(/<(article|section|main|div|h[1-6]|p|table|ul|ol)\b/i)
  if (firstContentTag > 0 && html.slice(0, firstContentTag).trim()) {
    html = html.slice(firstContentTag)
  }

  html = html
    .replace(/<!DOCTYPE[^>]*>/gi, '')
    .replace(/<html[^>]*>/gi, '')
    .replace(/<\/html>/gi, '')
    .replace(/<head[^>]*>[\s\S]*?<\/head>/gi, '')
    .replace(/<body[^>]*>/gi, '')
    .replace(/<\/body>/gi, '')
    .replace(/<style[^>]*>[\s\S]*?<\/style>/gi, '')
    .replace(/<script[^>]*>[\s\S]*?<\/script>/gi, '')
    .replace(/<meta[^>]*>/gi, '')
    .replace(/<title[^>]*>[\s\S]*?<\/title>/gi, '')
    .trim()

  if (!/<[^>]+>/.test(html)) {
    return plainTextToHtml(html)
  }

  return html
}