function ClassTime(hour, minute, am) { this.hour = hour; this.minute = minute; this.am = am; this.isLessThan = function (othertime) { if(this.am && !othertime.am)
return true; if(!this.am && othertime.am)
return false; if(this.hour == 12 && othertime.hour < 12)
return true; else if(othertime.hour == 12 && this.hour < 12) { return false;} else if(this.hour < othertime.hour) { return true;} else if(othertime.hour < this.hour) { return false;} else { if(this.minute < othertime.minute)
return true; else
return false;}
}
this.minutesUntil = function (othertime) { var hourdiff = othertime.hour - this.hour; if(othertime.hour == 12)
hourdiff -= 12; if(this.hour == 12)
hourdiff += 12; if(this.am && !othertime.am)
hourdiff += 12; var mindiff = othertime.minute - this.minute; return hourdiff*60 + mindiff;}
this.minuteNearestMultipleOfFive = function () { return parseInt(Math.round(this.minute / 5.0) * 5);}
this.equals = function (othertime) { if(this.hour == othertime.hour && this.minute == othertime.minute && this.am == othertime.am)
return true; else
return false;}
this.toString = function () { var ret = ""; if(hour < 10)
ret += "0"; ret += hour; ret += ":"; if(minute < 10)
ret += "0"; ret += minute; if(am)
ret += "am"; else
ret += "pm"; return ret;}
}
function Class(id, cn, from, to, mon,tues,wed,thurs,fri) { this.id = id; this.courseName = cn; this.from = from; this.to = to; this.mon=mon; this.tues=tues; this.wed=wed; this.thurs=thurs; this.fri=fri; this.intersectsWith = function (otherClass) { if( (!this.mon || !otherClass.mon ) &&
(!this.tues || !otherClass.tues ) &&
(!this.wed || !otherClass.wed ) &&
(!this.thurs || !otherClass.thurs) &&
(!this.fri || !otherClass.fri) )
{ return false;} else { if(this.to.isLessThan(otherClass.from) || otherClass.to.isLessThan(this.from))
{ return false;} else { return true;}
}
}
}
function isInvalidTime(time) { if(time.am && time.hour<7 && time.hour != 12)
return true; if(!time.am && time.hour > 9 && time.hour != 12)
return true; return false;}
function timeparse(time) { time = time.replace(/[ ]/,""); if(time.indexOf(':') == -1)
return null; if(time.toLowerCase().indexOf('am') == -1 && time.toLowerCase().indexOf('pm') == -1)
return null; else if(time.toLowerCase().indexOf('am') > -1) { var am = true; var lastIdx = time.toLowerCase().indexOf('am');} else { var am = false; var lastIdx = time.toLowerCase().indexOf('pm');}
var colonIdx = time.indexOf(':'); try { var hour = parseInt(time.substring(0,colonIdx)); if(hour != time.substring(0,colonIdx)-0)
return null; var min = parseInt(time.substring(colonIdx+1,lastIdx)); if(min != time.substring(colonIdx+1, lastIdx)-0)
return null;} catch(err) { return null;}
if(hour <= 0 || hour > 12)
return null; if(min < 0 || min > 59)
return null; return new ClassTime(hour, min, am);}
var rownum = 1; var classes = new Array(); function addClass() { var from = timeparse(document.forms[0].elements[1].value); if(from == null) { alert("please format the 'from' time according to the examples"); return;} else if(isInvalidTime(from)) { alert("'from' time must be between 7:00am and 9:59pm"); return;}
var to = timeparse(document.forms[0].elements[2].value); if(to == null) { alert("please format the 'to' time according to the examples"); return;} else if(isInvalidTime(to)) { alert("'to' time must be between 7:00am and 9:59pm"); return;}
if(!from.isLessThan(to)) { alert("the 'from' time must be earlier than the 'to' time"); return;}
var minuntil = from.minutesUntil(to); if(minuntil < 45) { alert("for aesthetic reasons, a class must be at least 45 minutes long. do you really have a class that short?"); return;}
var oneIsChecked = false; for(var i=3;i<=7;i++) { if(document.forms[0].elements[i].checked) { oneIsChecked = true; break;}
}
if(!oneIsChecked) { alert("your class must have at least one day"); return;}
var newclass = new Class("row_"+rownum, document.forms[0].elements[0].value, from, to, document.forms[0].elements[3].checked,document.forms[0].elements[4].checked, document.forms[0].elements[5].checked,document.forms[0].elements[6].checked,document.forms[0].elements[7].checked); for(var i=0;i<classes.length;i++) { if(newclass.intersectsWith(classes[i])) { alert("class overlaps an existing class"); return;}
}
addToSchedule(newclass); var row = document.createElement("tr"); row.id = "row_"+rownum; rownum++; var nametd = document.createElement("td"); nametd.appendChild(document.createTextNode(document.forms[0].elements[0].value)); row.appendChild(nametd); var timetd = document.createElement("td"); timetd.appendChild(document.createTextNode(from.toString()+"-"+to.toString())); row.appendChild(timetd); var daystd = document.createElement("td"); var days = ""; if(document.forms[0].elements[3].checked)
days += "M"; if(document.forms[0].elements[4].checked)
days += "T"; if(document.forms[0].elements[5].checked)
days += "W"; if(document.forms[0].elements[6].checked)
days += "H"; if(document.forms[0].elements[7].checked)
days += "F"; daystd.appendChild(document.createTextNode(days)); row.appendChild(daystd); var removetd = document.createElement("td"); removetd.className = "removecol"; var removelink = document.createElement("a"); removelink.appendChild(document.createTextNode('rem')); removelink.href = "#"; removelink.onclick = removeMe; removetd.appendChild(removelink); row.appendChild(removetd); document.getElementById('emptyschedulemsg').style.display="none"; document.getElementById('schedulelisttbody').appendChild(row); clearForm();}
function removeMe(e) { if(!e) var e = window.event; if(e.srcElement)
var node = e.srcElement; else if(e.target)
var node = e.target; else { alert("e.srcElement, e.target; neither found"); return;}
while(node != null && node.nodeName.toLowerCase() != "tr")
node = node.parentNode; if(node == null) { alert("node == null"); return;}
removeFromSchedule(node.id); removeNode(node.id); if(classes.length == 0) { document.getElementById('emptyschedulemsg').style.display="";}
return false;}
function removeNode(id) { var node = document.getElementById(id); if(node)
node.parentNode.removeChild(node);}
function clearForm() { for(var i=0;i<=2;i++)
document.forms[0].elements[i].value = ""; for(var i=3;i<=7;i++)
document.forms[0].elements[i].checked = false;}