<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
<script src="json2.js"></script>
<script>
    function myClass() {
        var obj =
        {
            'id':-1,
            'year':"2011",
            'semester':"1",
            'name':"none",
            'teacher':"none"
        }
        obj.classtime = new Array();
        return obj;
    }
    
	function myClasstime() {
        var obj =
        {
            'weekday':"none",
            'startTime':-1,
            'span':-1
        }
        return obj;
    }
    
	function test() {
        $.ajax({
               type: "get",
               url: "http://electsys0.sjtu.edu.cn/edu/newsboard/newsinside.aspx",
               cache: false,
               async: false,
               success: function(msg) {
                   var classInfo = msg.substring(msg.indexOf('<td style="border-width:1px;border-style:solid;">'));
                   classInfo = classInfo.substring(0, classInfo.indexOf("/table"));
                   
                   // get all classes
                   var totalClasses = new Array();
                   var number = 0;
                   var currentClassInfo = "1";
                   while (currentClassInfo != "") {
                       currentClassInfo = classInfo.substring(0, classInfo.substring(1).indexOf('<td style="border-width:1px;border-style:solid;">'));
                       classInfo = classInfo.substring(classInfo.substring(1).indexOf('<td style="border-width:1px;border-style:solid;">') + 1);
                       var currentClass = new myClass();
                       currentClass.name = currentClassInfo.substring(49, currentClassInfo.indexOf("</td"));
                       currentClass.name = currentClass.name.substring(0, currentClass.name.indexOf(" "));
                       totalClasses[number] = currentClass;
                       var href = currentClassInfo.substring(currentClassInfo.indexOf("href") + 5, currentClassInfo.indexOf("target"));
                       totalClasses[number].id = href;
                       number++;
                   }
                   // deal last one
                   {
                       currentClassInfo = classInfo;
                       var currentClass = new myClass();
                       currentClass.name = currentClassInfo.substring(49, currentClassInfo.indexOf("</td"));
                       currentClass.name = currentClass.name.substring(0, currentClass.name.indexOf(" "));
                       totalClasses[number - 1] = currentClass;
                       var href = currentClassInfo.substring(currentClassInfo.indexOf("href") + 5, currentClassInfo.indexOf("target"));
                       totalClasses[number - 1].id = href;
                   }
                   
                   // get class time
                   var classes = msg.substring(msg.indexOf("LessonTbl1_spanContent"));
                   classes = classes.replace(/&nbsp;/g, " ");
                   // eliminate Monday to Sunday columns
                   classes = classes.substring(classes.indexOf("/tr") + 4);
                   // get each row
                   var classRows = new Array();
                   for (i = 0; i < 14; ++i) {
                       classRows[i] = classes.substring(0, classes.indexOf("/tr") + 4);
                       classes = classes.substring(classes.indexOf("/tr") + 4);
                       // eliminate first column
                       classRows[i] = classRows[i].substring(classRows[i].indexOf("/td") + 3);
                       for (j = 0; j < 7; ++j) {
                           var singleClass = classRows[i].substring(classRows[i].indexOf("classmain"), classRows[i].indexOf("/td"));
                           classRows[i] = classRows[i].substring(classRows[i].indexOf("/td") + 1);
                           var className = singleClass.substring(singleClass.indexOf(">") + 1);
                           className = className.substring(0, className.indexOf("（"));
                           var k = 0;
                           for (k = 0; k < number; ++k) {
                               if (totalClasses[k].name == className)
                               break;
                           }
                           if (k != number) {
                               var classtime = new myClasstime();
                               var classtimeNum = totalClasses[k].classtime.length;
                               totalClasses[k].classtime[classtimeNum] = classtime;
                               totalClasses[k].classtime[classtimeNum].weekday = j + 1;
                               totalClasses[k].classtime[classtimeNum].startTime = i + 1;
                               var span = singleClass.substring(singleClass.indexOf("rowspan=") + 8, singleClass.indexOf(">"));
                               totalClasses[k].classtime[classtimeNum].span = parseInt(span);
                           }
                       }
                   }
                   
                   /* get ID and teacher name */
                   for (i = 0; i < totalClasses.length; ++i) {
                       $.ajax({
                              type: "get",
                              url: "http://electsys0.sjtu.edu.cn/edu" + totalClasses[i].id.substring(3, totalClasses[i].id.length - 2),
                              cache: false,
                              async: false,
                              success: function(msg) {
                                  var teacher = msg.substring(msg.indexOf("姓名"));
                                  teacher = teacher.substring(teacher.indexOf('xtdcolour2">') + 12);
                                  totalClasses[i].teacher = teacher.substring(0, teacher.indexOf('\r'));
                                  var classID = msg.substring(msg.indexOf("课程代码"));
                                  // magic number
                                  totalClasses[i].id = classID.substring(12, 17);
                                  var year = msg.substring(msg.indexOf("学年"));
                                  // magic number
                                  totalClasses[i].year = year.substring(10, 14);
                                  var semester = msg.substring(msg.indexOf("学期"));
                                  totalClasses[i].semester = semester.substring(10, 11);
                              },
                              error: function(){}
                              });
                   }
                   
                   /* encode to json and transfer it to server */
                   var json_text = JSON.stringify(totalClasses, null, 2);
                   $.ajax({
                          type: "POST",
                          url: "http://localhost/OTL_SNS/index.php/takes/import",
                          datatype: 'json',
                          data: "schedule=" + json_text,
                          success: function(){chrome.tabs.executeScript(null,{code:"alert('success');"});},
                          error: function(){chrome.tabs.executeScript(null,{code:"alert('connect server error');"});}
                          });
               
                    }
        });
        document.getElementById('button').innerHTML="OK!";
        chrome.tabs.executeScript(null,{code:"alert('Done');"});
    }
    </script>
<div id="button" onclick="test()">GET DATA</div>