hexo-seo/src/minifier/html.ts

Automated Seo Optimizer For Hexo

'use strict';
import bluebird from 'bluebird';
import Hexo from 'hexo';
import { Options as htmlMinifyOptions, minify } from 'html-minifier-terser';
import { minimatch } from 'minimatch';
import pkg from '../../package.json';
import getConfig from '../config';
import logger from '../log';
import { isIgnore } from '../utils';
import { streamToArray } from '../utils/stream';

export interface MinifyOptions extends htmlMinifyOptions {
  /**
   * Fix html
   */
  fix?: boolean;
  /**
   * Array of exclude patterns to exclude from minifying
   */
  exclude: string[];
}

const minHtml = function (this: Hexo) {
  const hexo = this;
  const options: MinifyOptions = getConfig(hexo).html;
  // if option html is false, return
  if (typeof options == 'boolean' && !options) return;
  const route = hexo.route;
  // Filter routes to select all html files.
  const routes = route.list().filter(function (path0) {
    let choose = minimatch(path0, '**/*.{htm,html}', { nocase: true });
    if (typeof options.exclude != 'undefined') {
      choose = choose && !isIgnore(path0, options.exclude);
    }
    if (typeof hexo.config.skip_render != 'undefined') {
      // _config.yml skip_render https://hexo.io/docs/configuration.html#Directory
      choose = choose && !isIgnore(path0, hexo.config.skip_render);
    }
    return choose;
  });

  return bluebird.all(routes).map((path0) => {
    //const str = await minify(str, options);
    // Retrieve and concatenate buffers.
    const stream = route.get(path0);
    return streamToArray(stream)
      .then((buff) => {
        return buff.join('');
      })
      .then((str) => {
        return minify(str, options).then((result) => {
          const len0 = result.length;
          const saved = len0 ? (((len0 - result.length) / len0) * 100).toFixed(2) : 0;
          logger.log('%s(HTML): %s [ %s saved]', pkg.name, path0, saved + '%');
          route.set(path0, result);
          return result;
        });
      });
  });
};

export default minHtml;