scrape-meta/dist/rules/favicon.js

A library to easily scrape metadata from an article on the web using Open Graph metadata, regular HTML metadata, and series of fallbacks.

'use strict';

var isUrl = require('is-url');
var utils = require('../utils'

/**
 * Wrap a rule with validation and formatting logic.
 *
 * @param {Function} rule
 * @return {Function} wrapped
 */

);function wrap(rule) {
  return function ($, sourceUrl) {
    var value = rule($);
    if (isUrl(value)) {
      return value;
    } else if (typeof value === 'string' && sourceUrl) {
      return utils.resolveImagePath(sourceUrl, value);
    }
    return;
  };
}

/**
 * Rules.
 */
// CHECK SIZES AND GET LARGEST
module.exports = [wrap(function ($) {
  return $('link[rel~="apple-touch-icon"]').first().attr('href');
}), wrap(function ($) {
  return $('link[rel~="apple-touch-startup-image"]').first().attr('href');
}), wrap(function ($) {
  return $('link[rel~="icon"]').first().attr('href');
}), wrap(function ($) {
  return $('link[rel~="shortcut icon"]').first().attr('href');
}), wrap(function ($) {
  return $('link[rel~="icon shortcut"]').first().attr('href');
}), wrap(function ($) {
  return $('link[rel~="ICON"]').first().attr('href');
}), wrap(function ($) {
  return $('link[rel~="ICON SHORTCUT"]').first().attr('href');
}), wrap(function ($) {
  return $('link[rel~="SHORTCUT ICON"]').first().attr('href');
})];