AngularJS Share controller invoking drive-share

controllers.js

controllersModule.controller('ShareCtrl', ['$scope','appId','doc', function($scope, appId, doc) {
    var client = new gapi.drive.share.ShareClient(appId);
    $scope.enabled = function () {
        return doc.info.id != null;
    };
    $scope.share = function () {
        client.setItemIds([doc.info.id]);
        client.showSettingsDialog();
    }
}]);