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/*

Based on the jQuery plugin found at http://www.kunalbabre.com/projects/TableCSVExport.php

Re-worked by ZachWick for LectureTools Inc. Sept. 2011

Copyright (c) 2011 LectureTools Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

*/

/*

**  Vix: Minor modifications to:

**      Fill popup with entire TextArea

**      Only select td in the current table - prevent picking up bits from nested tables

**      'th' with a class of 'noCsv' will exclude the entire column from the output

*/

jQuery.fn.TableCSVExport = function (options) {

    var options = jQuery.extend({

        separator: ',',

        header: [],

        columns: [],

        extraHeader: "",

        extraData: [],

        insertBefore: "",

        delivery: 'popup' /* popup, value, download */,

        emptyValue: '',

        showHiddenRows: false,

	    rowFilter: "",

	    filename: "download.csv"

    },

    options);

    var csvData = [];

    var headerArr = [];

    var el = this;

    var basic = options.columns.length == 0 ? true : false;

    var columnNumbers = [];

    var columnCounter = 0;

    var insertBeforeNum = null;

    //header

    var numCols = options.header.length;

    var tmpRow = []; // construct header avalible array

    var incCol = [];

    if (numCols > 0) {

        if (basic) {

            for (var i = 0; i < numCols; i++) {

                if (options.header[i] == options.insertBefore) {

                    tmpRow[tmpRow.length] = formatData(options.extraHeader);

                    insertBeforeNum = i;

                }

                tmpRow[tmpRow.length] = formatData(options.header[i]);

            }

        } else if (!basic) {

            for (var o = 0; o < numCols; o++) {

                for (var i = 0; i < options.columns.length; i++) {

                    if (options.columns[i] == options.header[o]) {

                        if (options.columns[i] == options.insertBefore) {

                            tmpRow[tmpRow.length] = formatData(options.extraHeader);

                            insertBeforeNum = o;

                        }

                        tmpRow[tmpRow.length] = formatData(options.header[o]);

                        columnNumbers[columnCounter] = o;

                        columnCounter++;

                    }

                }

            }

        }

    } else {

        getAvailableElements(el).find('th').each(function (idx) {

            incCol[idx] = !jQuery(this).hasClass('noCsv');

            if ( incCol[idx] ) {

                if ( jQuery(this).css('display') != 'none' || options.showHiddenRows ) tmpRow[tmpRow.length] = formatData(jQuery(this).html());

            }

        });

    }

    row2CSV(tmpRow);

    // actual data

    if (basic) {

        var trCounter = 0;

        getAvailableRows(el).each(function () {

            var tmpRow = [];

            var extraDataCounter = 0;

            getAvailableElements(this).find('td').each(function (idx) {

                if ( incCol[idx] ) {

                    if ( extraDataCounter == insertBeforeNum )

                    {

                        tmpRow[tmpRow.length] = jQuery.trim(options.extraData[trCounter - 1]);

                    }

                    if (jQuery(this).css('display') != 'none' || options.showHiddenRows) {

                        if (jQuery.trim(jQuery(this).html()) == "") {

                            tmpRow[tmpRow.length] = formatData(options.emptyValue);

                        } else {

                            tmpRow[tmpRow.length] = jQuery.trim(formatData(jQuery(this).html()));

                        }

                    }

                    extraDataCounter++;

                }

            });

            row2CSV(tmpRow);

            trCounter++;

        });

    } else {

        var trCounter = 0;

        getAvailableRows(el).each(function () {

            var tmpRow = [];

            var columnCounter = 0;

            var extraDataCounter = 0;

            getAvailableElements(this).find('td').each(function () {

                if ((columnCounter in columnNumbers) && (extraDataCounter == insertBeforeNum)) {

                    tmpRow[tmpRow.length] = jQuery.trim(formatData(options.extraData[trCounter - 1]));

                }

                if ((jQuery(this).css('display') != 'none' || options.showHiddenRows) && (columnCounter in columnNumbers)) {

                    tmpRow[tmpRow.length] = jQuery.trim(formatData(jQuery(this).html()));

                }

                columnCounter++;

                extraDataCounter++;

            });

            row2CSV(tmpRow);

            trCounter++;

        });

    }

    function getAvailableRows(el) {

        return jQuery(el).find('>tbody >tr' + options.rowFilter);

    }

    function getAvailableElements(el) {

        if (options.showHiddenRows) {

            return jQuery(el);

        } else {

            return jQuery(el).filter(':visible');

        }

    }

    if ((options.delivery == 'popup') || (options.delivery == 'download')) {

        var mydata = csvData.join('\n');

        return popup(mydata);

    } else {

        var mydata = csvData.join('\n');

        return mydata;

    }

    function row2CSV(tmpRow) {

        var tmp = tmpRow.join('') // to remove any blank rows

        // alert(tmp);

        if (tmpRow.length > 0 && tmp != '') {

            var mystr = tmpRow.join(options.separator);

            csvData[csvData.length] = jQuery.trim(mystr);

        }

    }

    function formatData(input) {

        // mask " with "

        var regexp = new RegExp(/["]/g); //"

        var output = input.replace(regexp, '""');

        // TODO: mask \""; at the end, so openoffice can open it correctly

        // strip HTML

        output = output.replace("<br>"," ");

        if(!( output != null && typeof output === 'object')) output = "<span>"+output+"</span>"; // to be able to use jquery

        output = $(output).text().trim();

        if (output == "") return '';

        return '"' + output + '"';

    }

    function popup(data) {

        if (options.delivery == 'download') {

            var blob = new Blob(['\ufeff'+data], { type: 'text/csv;charset=utf-8;' });

            if (navigator.msSaveBlob) { // IE 10+

                navigator.msSaveBlob(blob, options.filename);

            } else {

                var link = document.createElement("a");

                var url = URL.createObjectURL(blob);

                var isSafari = navigator.userAgent.indexOf('Safari') != -1 && navigator.userAgent.indexOf('Chrome') == -1;

                if (isSafari) //if Safari open in new window to save file with random filename.

                    link.setAttribute("target", "_blank");

                link.setAttribute("href", url);

                link.setAttribute("download", options.filename);

                link.style = "visibility:hidden";

                document.body.appendChild(link);

                link.click();

                document.body.removeChild(link);

            }

            return true;

        } else {

            var generator = window.open('', 'csv', 'height=400,width=600');

            generator.document.write('<html><head><title>CSV</title>');

            generator.document.write('</head><body >');

            generator.document.write('<textArea style="width:100%; height:100%;" wrap="off" >');

            generator.document.write(data);

            generator.document.write('</textArea>');

            generator.document.write('</body></html>');

            generator.document.close();

            return true;

        }

    }

};