Meteor.methods({
  testGetEmbedlyData: function (url) {
    check(url, String);
    console.log(getEmbedlyData(url));
  },
  getEmbedlyData: function (url) {
    check(url, String);
    return getEmbedlyData(url);
  },
  embedlyKeyExists: function () {
    return !!Telescope.settings.get('embedlyKey');
  },
  generateThumbnail: function (post) {
    check(post, Posts.simpleSchema());
    if (Users.canEdit(Meteor.user(), post)) {
      regenerateThumbnail(post);
    }
  },
  generateThumbnails: function (limit = 20, mode = "generate") {
    // mode = "generate" : generate thumbnails only for all posts that don't have one
    // mode = "all" : regenerate thumbnais for all posts
      
    if (Users.isAdmin(Meteor.user())) {
      
      console.log("// Generating thumbnails…")
      
      const selector = {url: {$exists: true}};
      if (mode === "generate") {
        selector.thumbnailUrl = {$exists: false};
      }

      const posts = Posts.find(selector, {limit: limit, sort: {postedAt: -1}});

      posts.forEach((post, index) => {
        Meteor.setTimeout(function () {
          console.log(`// ${index}. fetching thumbnail for “${post.title}” (_id: ${post._id})`);
          try {
            regenerateThumbnail(post);
          } catch (error) {
            console.log(error);
          }
        }, index * 1000);
      });
    }
  }
});