whatsthis/services/image.js

Discover embedable content from URL's

'use strict';

var img = require('image-extensions')
  , path = require('path');

/**
 * Detect if the given URL is an image.
 *
 * @param {Result} result Result of message parsing.
 * @param {Function} next Continuation callback.
 * @private
 */
module.exports = function image(result, next) {
  var ext = path.extname(result.url.pathname).slice(1);

  //
  // Imgur edgecase, we don't want gifv's to be shown as movies, but as gifs
  // because we lack the technical implementation for that at this point. So
  // simply rewrite the gifv to gif and it shall work
  //
  if (~result.url.hostname.indexOf('imgur') && 'gifv' === ext) {
    result.url.set('pathname', result.url.pathname.split('.')[0] + '.gif');
    ext = 'gif';
  }

  if (!~img.indexOf(ext)) {
    return next();
  }

  result.type = 'image';
  result.service = 'image';
  result.html = '<a href="'+ result.url.href +'" target="_blank"><img src="'+ result.url.href +'" /></a>';

  next(undefined, true);
};