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/*jshint eqeqeq:false, eqnull:true, devel:true */
/*global jQuery, xmlJsonClass */
(function($){
/*
 * jqGrid extension for constructing Grid Data from external file
 * Tony Tomov tony@trirand.com
 * http://trirand.com/blog/ 
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl-2.0.html
**/ 

"use strict";
    $.jgrid.extend({
        jqGridImport : function(o) {
            o = $.extend({
                imptype : "xml", // xml, json, xmlstring, jsonstring
                impstring: "",
                impurl: "",
                mtype: "GET",
                impData : {},
                xmlGrid :{
                    config : "roots>grid",
                    data: "roots>rows"
                },
                jsonGrid :{
                    config : "grid",
                    data: "data"
                },
                ajaxOptions :{}
            }, o || {});
            return this.each(function(){
                var $t = this;
                var xmlConvert = function (xml,o) {
                    var cnfg = $(o.xmlGrid.config,xml)[0];
                    var xmldata = $(o.xmlGrid.data,xml)[0], jstr, jstr1, key;
                    if(xmlJsonClass.xml2json && $.jgrid.parse) {
                        jstr = xmlJsonClass.xml2json(cnfg," ");
                        jstr = $.jgrid.parse(jstr);
                        for(key in jstr) {
                            if(jstr.hasOwnProperty(key)) {
                                jstr1=jstr[key];
                            }
                        }
                        if(xmldata) {
                        // save the datatype
                            var svdatatype = jstr.grid.datatype;
                            jstr.grid.datatype = 'xmlstring';
                            jstr.grid.datastr = xml;
                            $($t).jqGrid( jstr1 ).jqGrid("setGridParam",{datatype:svdatatype});
                        } else {
                            $($t).jqGrid( jstr1 );
                        }
                        jstr = null;jstr1=null;
                    } else {
                        alert("xml2json or parse are not present");
                    }
                };
                var jsonConvert = function (jsonstr,o){
                    if (jsonstr && typeof jsonstr == 'string') {
						var _jsonparse = false;
						if($.jgrid.useJSON) {
							$.jgrid.useJSON = false;
							_jsonparse = true;
						}
                        var json = $.jgrid.parse(jsonstr);
						if(_jsonparse) { $.jgrid.useJSON = true; }
                        var gprm = json[o.jsonGrid.config];
                        var jdata = json[o.jsonGrid.data];
                        if(jdata) {
                            var svdatatype = gprm.datatype;
                            gprm.datatype = 'jsonstring';
                            gprm.datastr = jdata;
                            $($t).jqGrid( gprm ).jqGrid("setGridParam",{datatype:svdatatype});
                        } else {
                            $($t).jqGrid( gprm );
                        }
                    }
                };
                switch (o.imptype){
                    case 'xml':
                        $.ajax($.extend({
                            url:o.impurl,
                            type:o.mtype,
                            data: o.impData,
                            dataType:"xml",
                            complete: function(xml,stat) {
                                if(stat == 'success') {
                                    xmlConvert(xml.responseXML,o);
                                    $($t).triggerHandler("jqGridImportComplete", [xml, o]);
                                    if($.isFunction(o.importComplete)) {
                                        o.importComplete(xml);
                                    }
                                }
                                xml=null;
                            }
                        }, o.ajaxOptions));
                        break;
                    case 'xmlstring' :
                        // we need to make just the conversion and use the same code as xml
                        if(o.impstring && typeof o.impstring == 'string') {
                            var xmld = $.jgrid.stringToDoc(o.impstring);
                            if(xmld) {
                                xmlConvert(xmld,o);
                                $($t).triggerHandler("jqGridImportComplete", [xmld, o]);
                                if($.isFunction(o.importComplete)) {
                                    o.importComplete(xmld);
                                }
                                o.impstring = null;
                            }
                            xmld = null;
                        }
                        break;
                    case 'json':
                        $.ajax($.extend({
                            url:o.impurl,
                            type:o.mtype,
                            data: o.impData,
                            dataType:"json",
                            complete: function(json) {
                                try {
                                    jsonConvert(json.responseText,o );
                                    $($t).triggerHandler("jqGridImportComplete", [json, o]);
                                    if($.isFunction(o.importComplete)) {
                                        o.importComplete(json);
                                    }
                                } catch (ee){}
                                json=null;
                            }
                        }, o.ajaxOptions ));
                        break;
                    case 'jsonstring' :
                        if(o.impstring && typeof o.impstring == 'string') {
                            jsonConvert(o.impstring,o );
                            $($t).triggerHandler("jqGridImportComplete", [o.impstring, o]);
                            if($.isFunction(o.importComplete)) {
                                o.importComplete(o.impstring);
                            }
                            o.impstring = null;
                        }
                        break;
                }
            });
        },
        jqGridExport : function(o) {
            o = $.extend({
                exptype : "xmlstring",
                root: "grid",
                ident: "\t"
            }, o || {});
            var ret = null;
            this.each(function () {
                if(!this.grid) { return;}
                var key, gprm = $.extend(true, {},$(this).jqGrid("getGridParam"));
                // we need to check for:
                // 1.multiselect, 2.subgrid  3. treegrid and remove the unneded columns from colNames
                if(gprm.rownumbers) {
                    gprm.colNames.splice(0,1);
                    gprm.colModel.splice(0,1);
                }
                if(gprm.multiselect) {
                    gprm.colNames.splice(0,1);
                    gprm.colModel.splice(0,1);
                }
                if(gprm.subGrid) {
                    gprm.colNames.splice(0,1);
                    gprm.colModel.splice(0,1);
                }
                gprm.knv = null;
                if(gprm.treeGrid) {
                    for (key in gprm.treeReader) {
                        if(gprm.treeReader.hasOwnProperty(key)) {
                            gprm.colNames.splice(gprm.colNames.length-1);
                            gprm.colModel.splice(gprm.colModel.length-1);
                        }
                    }
                }
                switch (o.exptype) {
                    case 'xmlstring' :
                        ret = "<"+o.root+">"+xmlJsonClass.json2xml(gprm,o.ident)+"</"+o.root+">";
                        break;
                    case 'jsonstring' :
                        ret = "{"+ xmlJsonClass.toJson(gprm,o.root,o.ident,false)+"}";
                        if(gprm.postData.filters !== undefined) {
                            ret=ret.replace(/filters":"/,'filters":');
                            ret=ret.replace(/}]}"/,'}]}');
                        }
                        break;
                }
            });
            return ret;
        },
        excelExport : function(o) {
            o = $.extend({
                exptype : "remote",
                url : null,
                oper: "oper",
                tag: "excel",
                exportOptions : {}
            }, o || {});
            return this.each(function(){
                if(!this.grid) { return;}
                var url;
                if(o.exptype == "remote") {
                    var pdata = $.extend({},this.p.postData);
                    pdata[o.oper] = o.tag;
                    var params = jQuery.param(pdata);
                    if(o.url.indexOf("?") != -1) { url = o.url+"&"+params; }
                    else { url = o.url+"?"+params; }
                    window.location = url;
                }
            });
        }
    });
})(jQuery);