/*

 * jQuery Iframe Transport Plugin 1.6.1

 * https://github.com/blueimp/jQuery-File-Upload

 *

 * Copyright 2011, Sebastian Tschan

 * https://blueimp.net

 *

 * Licensed under the MIT license:

 * http://www.opensource.org/licenses/MIT

 */



/*jslint unparam: true, nomen: true */

/*global define, window, document */



(function (factory) {

    'use strict';

    if (typeof define === 'function' && define.amd) {

        // Register as an anonymous AMD module:

        define(['jquery'], factory);

    } else {

        // Browser globals:

        factory(window.jQuery);

    }

}(function ($) {

    'use strict';



    // Helper variable to create unique names for the transport iframes:

    var counter = 0;



    // The iframe transport accepts three additional options:

    // options.fileInput: a jQuery collection of file input fields

    // options.paramName: the parameter name for the file form data,

    //  overrides the name property of the file input field(s),

    //  can be a string or an array of strings.

    // options.formData: an array of objects with name and value properties,

    //  equivalent to the return data of .serializeArray(), e.g.:

    //  [{name: 'a', value: 1}, {name: 'b', value: 2}]

    $.ajaxTransport('iframe', function (options) {

        if (options.async) {

            var form,

                iframe,

                addParamChar;

            return {

                send: function (_, completeCallback) {

                    form = $('<form style="display:none;"></form>');

                    form.attr('accept-charset', options.formAcceptCharset);

                    addParamChar = /\?/.test(options.url) ? '&' : '?';

                    // XDomainRequest only supports GET and POST:

                    if (options.type === 'DELETE') {

                        options.url = options.url + addParamChar + '_method=DELETE';

                        options.type = 'POST';

                    } else if (options.type === 'PUT') {

                        options.url = options.url + addParamChar + '_method=PUT';

                        options.type = 'POST';

                    } else if (options.type === 'PATCH') {

                        options.url = options.url + addParamChar + '_method=PATCH';

                        options.type = 'POST';

                    }

                    // javascript:false as initial iframe src

                    // prevents warning popups on HTTPS in IE6.

                    // IE versions below IE8 cannot set the name property of

                    // elements that have already been added to the DOM,

                    // so we set the name along with the iframe HTML markup:

                    iframe = $(

                        '<iframe src="javascript:false;" name="iframe-transport-' +

                            (counter += 1) + '"></iframe>'

                    ).bind('load', function () {

                        var fileInputClones,

                            paramNames = $.isArray(options.paramName) ?

                                    options.paramName : [options.paramName];

                        iframe

                            .unbind('load')

                            .bind('load', function () {

                                var response;

                                // Wrap in a try/catch block to catch exceptions thrown

                                // when trying to access cross-domain iframe contents:

                                try {

                                    response = iframe.contents();

                                    // Google Chrome and Firefox do not throw an

                                    // exception when calling iframe.contents() on

                                    // cross-domain requests, so we unify the response:

                                    if (!response.length || !response[0].firstChild) {

                                        throw new Error();

                                    }

                                } catch (e) {

                                    response = undefined;

                                }

                                // The complete callback returns the

                                // iframe content document as response object:

                                completeCallback(

                                    200,

                                    'success',

                                    {'iframe': response}

                                );

                                // Fix for IE endless progress bar activity bug

                                // (happens on form submits to iframe targets):

                                $('<iframe src="javascript:false;"></iframe>')

                                    .appendTo(form);

                                form.remove();

                            });

                        form

                            .prop('target', iframe.prop('name'))

                            .prop('action', options.url)

                            .prop('method', options.type);

                        if (options.formData) {

                            $.each(options.formData, function (index, field) {

                                $('<input type="hidden"/>')

                                    .prop('name', field.name)

                                    .val(field.value)

                                    .appendTo(form);

                            });

                        }

                        if (options.fileInput && options.fileInput.length &&

                                options.type === 'POST') {

                            fileInputClones = options.fileInput.clone();

                            // Insert a clone for each file input field:

                            options.fileInput.after(function (index) {

                                return fileInputClones[index];

                            });

                            if (options.paramName) {

                                options.fileInput.each(function (index) {

                                    $(this).prop(

                                        'name',

                                        paramNames[index] || options.paramName

                                    );

                                });

                            }

                            // Appending the file input fields to the hidden form

                            // removes them from their original location:

                            form

                                .append(options.fileInput)

                                .prop('enctype', 'multipart/form-data')

                                // enctype must be set as encoding for IE:

                                .prop('encoding', 'multipart/form-data');

                        }

                        form.submit();

                        // Insert the file input fields at their original location

                        // by replacing the clones with the originals:

                        if (fileInputClones && fileInputClones.length) {

                            options.fileInput.each(function (index, input) {

                                var clone = $(fileInputClones[index]);

                                $(input).prop('name', clone.prop('name'));

                                clone.replaceWith(input);

                            });

                        }

                    });

                    form.append(iframe).appendTo(document.body);

                },

                abort: function () {

                    if (iframe) {

                        // javascript:false as iframe src aborts the request

                        // and prevents warning popups on HTTPS in IE6.

                        // concat is used to avoid the "Script URL" JSLint error:

                        iframe

                            .unbind('load')

                            .prop('src', 'javascript'.concat(':false;'));

                    }

                    if (form) {

                        form.remove();

                    }

                }

            };

        }

    });



    // The iframe transport returns the iframe content document as response.

    // The following adds converters from iframe to text, json, html, and script:

    $.ajaxSetup({

        converters: {

            'iframe text': function (iframe) {

                return iframe && $(iframe[0].body).text();

            },

            'iframe json': function (iframe) {

                return iframe && $.parseJSON($(iframe[0].body).text());

            },

            'iframe html': function (iframe) {

                return iframe && $(iframe[0].body).html();

            },

            'iframe script': function (iframe) {

                return iframe && $.globalEval($(iframe[0].body).text());

            }

        }

    });



}));

