Sindbad~EG File Manager

/* global ns */
/**
 * Adds a file upload field to the form.
 *
 * @param {mixed} parent
 * @param {object} field
 * @param {mixed} params
 * @param {function} setValue
 * @returns {ns.File}
 */
ns.File = function (parent, field, params, setValue) {
  var self = this;

  // Initialize inheritance
  ns.FileUploader.call(self, field);

  this.parent = parent;
  this.field = field;
  this.params = params;
  this.setValue = setValue;
  this.library = parent.library + '/' + field.name;
  this.id = ns.getNextFieldId(field);

  if (params !== undefined) {
    this.copyright = params.copyright;
  }

  this.changes = [];
  this.passReadies = true;
  parent.ready(function () {
    self.passReadies = false;
  });

  // Create remove file dialog
  this.confirmRemovalDialog = new H5P.ConfirmationDialog({
    headerText: H5PEditor.t('core', 'removeFile'),
    dialogText: H5PEditor.t('core', 'confirmRemoval', {':type': 'file'})
  }).appendTo(document.body);

  // Remove file on confirmation
  this.confirmRemovalDialog.on('confirmed', function () {
    delete self.params;
    self.setValue(self.field);
    self.addFile();

    for (var i = 0; i < self.changes.length; i++) {
      self.changes[i]();
    }
  });

  // When uploading starts
  self.on('upload', function () {
    // Insert throbber
    self.$file.html('<div class="h5peditor-uploading h5p-throbber">' + ns.t('core', 'uploading') + '</div>');

    // Clear old error messages
    self.$errors.html('');
  });

  // Monitor upload progress
  self.on('uploadProgress', function (e) {
    self.$file.children().html(ns.t('core', 'uploading') + ' ' + Math.round(e.data * 100) + ' %');
  });

  // Handle upload complete
  self.on('uploadComplete', function (event) {
    var result = event.data;

    try {
      if (result.error) {
        throw result.error;
      }

      self.params = self.params || {};
      self.params.path = result.data.path;
      self.params.mime = result.data.mime;
      self.params.copyright = self.copyright;

      // Make it possible for other widgets to process the result
      self.trigger('fileUploaded', result.data);

      self.setValue(self.field, self.params);

      for (var i = 0; i < self.changes.length; i++) {
        self.changes[i](self.params);
      }
    }
    catch (error) {
      self.$errors.append(ns.createError(error));
    }

    self.addFile();
  });
};

ns.File.prototype = Object.create(ns.FileUploader.prototype);
ns.File.prototype.constructor = ns.File;

/**
 * Append field to the given wrapper.
 *
 * @param {jQuery} $wrapper
 * @returns {undefined}
 */
ns.File.prototype.appendTo = function ($wrapper) {
  var self = this;

  var fileHtml =
    '<div class="file"></div>' +
    '<a class="h5p-copyright-button" href="#">' + ns.t('core', 'editCopyright') + '</a>' +
    '<div class="h5p-editor-dialog">' +
      '<a href="#" class="h5p-close" title="' + ns.t('core', 'close') + '"></a>' +
    '</div>';

  var html = ns.createFieldMarkup(this.field, fileHtml, this.id);

  var $container = ns.$(html).appendTo($wrapper);
  this.$copyrightButton = $container.find('.h5p-copyright-button');
  this.$file = $container.find('.file');
  this.$errors = $container.find('.h5p-errors');
  this.addFile();

  var $dialog = $container.find('.h5p-editor-dialog');
  $container.find('.h5p-copyright-button').add($dialog.find('.h5p-close')).click(function () {
    $dialog.toggleClass('h5p-open');
    return false;
  });

  ns.File.addCopyright(self, $dialog, function (field, value) {
    if (self.params !== undefined) {
      self.params.copyright = value;
    }
    self.copyright = value;
  });

};

/**
 * Help add copyright dialog to the given field
 *
 * @param {Object} field
 * @param {function} setCopyright
 */
ns.File.addCopyright = function (field, $dialog, setCopyright) {

  /**
   * Help find object in list with the given property value.
   *
   * @param {Object[]} list of objects to search through
   * @param {string} property to look for
   * @param {string} value to match property value against
   */
  var find = function (list, property, value) {
    var properties = property.split('.');

    for (var i = 0; i < list.length; i++) {
      var objProp = list[i];

      for (var j = 0; j < properties.length; j++) {
        objProp = objProp[properties[j]];
      }

      if (objProp === value) {
        return list[i];
      }
    }
  };

  // Re-map old licenses that have been moved
  if (field.copyright) {
    if (field.copyright.license === 'ODC PDDL') {
      field.copyright.license = 'PD';
      field.copyright.version = 'CC0 1.0';
    }
    else if (field.copyright.license === 'CC PDM') {
      field.copyright.license = 'PD';
      field.copyright.version = 'CC PDM';
    }
  }

  var group = new H5PEditor.widgets.group(field, H5PEditor.copyrightSemantics, field.copyright, setCopyright);
  // TODO: We'll have to do something here with metadataSemantics if we change the widgtets
  group.appendTo($dialog);
  group.expand();
  group.$group.find('.title').remove();
  field.children = [group];

  // Locate license and version selectors
  var licenseField = find(group.children, 'field.name', 'license');
  var versionField = find(group.children, 'field.name', 'version');
  versionField.field.optional = true; // Avoid any error messages

  // Listen for changes to license
  licenseField.changes.push(function (value) {
    // Find versions for selected value
    var option = find(licenseField.field.options, 'value', value);
    var versions = option.versions;

    versionField.$select.prop('disabled', versions === undefined);
    if (versions === undefined) {
      // If no versions add default
      versions = [{
        value: '-',
        label: '-'
      }];
    }

    // Find default selected version
    var selected = (field.copyright.license === value &&
                    field.copyright.version ? field.copyright.version : versions[0].value);

    // Update versions selector
    versionField.$select.html(H5PEditor.Select.createOptionsHtml(versions, selected)).change();
  });

  // Trigger update straight away
  licenseField.changes[licenseField.changes.length - 1](field.copyright.license);
};

/**
 * Creates thumbnail HTML and actions.
 *
 * @returns {Boolean}
 */
ns.File.prototype.addFile = function () {
  var that = this;

  if (this.params === undefined) {

    let html = '<a href="#" id="' + this.id + '" class="add"';
    if (this.field.description !== undefined) {
      html += ' aria-describedby="' + ns.getDescriptionId(this.id) + '"';
    }
    html += ' title="' + ns.t('core', 'addFile') + '">' +
      '<div class="h5peditor-field-file-upload-text">' + ns.t('core', 'add') + '</div>' +
    '</a>'

    this.$file.html(html).children('.add').click(function () {
      that.openFileSelector();
      return false;
    });
    this.$copyrightButton.addClass('hidden');
    return;
  }

  var thumbnail;
  if (this.field.type === 'image') {
    thumbnail = {};
    thumbnail.path = H5P.getPath(this.params.path, H5PEditor.contentId);
    thumbnail.height = 100;
    if (this.params.width !== undefined) {
      thumbnail.width = thumbnail.height * (this.params.width / this.params.height);
    }
  }
  else {
    thumbnail = ns.fileIcon;
  }

  var fileHtmlString = '<a href="#" id="' + this.id + '" title="' + ns.t('core', 'changeFile') + '" class="thumbnail"';
  if (this.field.description !== undefined) {
    fileHtmlString += ' aria-describedby="' + ns.getDescriptionId(this.id) + '"';
  }
  fileHtmlString += '><img ' +
      (thumbnail.width === undefined ? '' : ' width="' + thumbnail.width + '"') +
      'height="' + thumbnail.height + '"  '+
      'alt="' + (this.field.label === undefined ? '' : this.field.label) + '"/></a>' +
    '<a href="#" class="remove" title="' + ns.t('core', 'removeFile') + '"></a>';

  this.$file.html(fileHtmlString).children(':eq(0)').click(function () {
    that.openFileSelector();
    return false;
  }).children('img').attr('src', thumbnail.path).end().next().click(function () {
    that.confirmRemovalDialog.show(H5P.jQuery(this).offset().top);
    return false;
  });
  that.$copyrightButton.removeClass('hidden');
};

/**
 * Validate this item
 */
ns.File.prototype.validate = function () {
  return true;
};

/**
 * Remove this item.
 */
ns.File.prototype.remove = function () {
  // TODO: Check what happens when removed during upload.
  this.$file.parent().remove();
};

/**
 * Collect functions to execute once the tree is complete.
 *
 * @param {function} ready
 * @returns {undefined}
 */
ns.File.prototype.ready = function (ready) {
  if (this.passReadies) {
    this.parent.ready(ready);
  }
  else {
    ready();
  }
};

// Tell the editor what widget we are.
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