agneta-platform/portal/website/source/media/preview.js

Agneta Platform - Integrate and customize business applications

/*   Copyright 2017 Agneta Network Applications, LLC.
 *
 *   Source file: portal/website/source/media/preview.js
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */
function _e_preview(app) {

  app.service('MediaPreview', function() {
    var types = {
      file: {
        icon: 'material/insert-drive-file',
      },
      video: {
        icon: 'material/videocam',
      },
      image: {
        icon: 'material/photo',
      },
      folder: {
        icon: 'material/folder',
      }
    };

    this.init = function(options) {

      options = options || {};

      var preview = {};
      var get_media = options.get_media || agneta.get_media;

      preview.set = function(object) {

        object.background = backgroundImage(object);

        if (!object.background) {
          object.icon = objectIcon(object);
          if (!object.icon) {
            object.extension = object.ext;
          }
        }

        return object;
      };

      preview.hasBackground = function(file) {
        switch (file.type) {
          case 'image':
          case 'icon':
            return true;
        }
      };

      //------------------------------------------------------------

      function backgroundImage(file, size) {
        var url = image(file, size);
        if (url) {
          return 'url(' + url + ')';
        }
      }

      function image(file, size) {
        size = size || 'square';
        switch (file.type) {
          case 'image':
            return getUrl(file, size);
          case 'icon':
            return getUrl(file);
        }
      }

      preview.backgroundImage = backgroundImage;
      preview.image = image;

      //------------------------------------------------------------

      function getUrl(file, size, media) {
        media = media || get_media;
        var version = new Date(file.updatedAt).valueOf();
        return media(file.location, size) + '?version=' + version;
      }


      preview.getUrl = getUrl;

      //------------------------------------------------------------


      function objectIcon(object) {
        if (!object) {
          return;
        }
        var location = getIcon(object);

        if (location) {
          return getUrl({
            location: location,
            updatedAt: object.updatedAt
          }, null, agneta.get_media);
        }

      }

      preview.objectIcon = objectIcon;

      //------------------------------------------------------------

      function getIcon(object) {

        var type = types[object.type];
        if (type && type.icon) {
          return 'icons/' + type.icon;
        }
      }

      preview.getIcon = getIcon;

      preview.toScope = function(scope) {
        scope.preview = scope.preview || {};
        scope.preview.hasBackground = preview.hasBackground;
        scope.preview.backgroundImage = preview.backgroundImage;
        scope.preview.objectIcon = preview.objectIcon;
        scope.preview.get = preview.get;
      };

      return preview;

    };

    this.public = this.init();
    this.private = this.init({
      get_media: agneta.prv_media
    });

  });
}