[qomet.git] / public / javascripts / assessment.js

let socket = null; //monitor answers in real time

if (assessment.mode == "secure" && !checkWindowSize())
	document.location.href= "/fullscreen";

function checkWindowSize()
{
	// NOTE: temporarily accept smartphone (security hole: pretend being a smartphone on desktop browser...)
	if (navigator.userAgent.match(/(iPhone|iPod|iPad|Android|BlackBerry)/))
		return true;
	// 3 is arbitrary, but a small tolerance is required (e.g. in Firefox)
	return window.innerWidth >= screen.width-3 && window.innerHeight >= screen.height-3;
}

new Vue({
	el: "#assessment",
	data: {
		assessment: assessment,
		answers: { }, //filled later with answering parameters
		student: { }, //filled later (name, password)
		// Stage 0: unauthenticated (number),
		//       1: authenticated (got a name, unvalidated)
		//       2: locked: password set, exam started
		//       3: completed
		//       4: show answers
		remainingTime: assessment.time, //integer or array
		stage: assessment.mode != "open" ? 0 : 1,
		warnMsg: "",
	},
	computed: {
		countdown: function() {
			const remainingTime = assessment.display == "one" && _.isArray(assessment.time)
				? this.remainingTime[this.answers.index]
				: this.remainingTime;
			let seconds = remainingTime % 60;
			let minutes = Math.floor(remainingTime / 60);
			return this.padWithZero(minutes) + ":" + this.padWithZero(seconds);
		},
	},
	mounted: function() {
		$(".modal").modal();
		if (["exam","open"].includes(assessment.mode))
			return;
		window.addEventListener("blur", () => {
			if (this.stage != 2)
				return;
			if (assessment.mode == "secure")
			{
				this.sendAnswer();
				document.location.href= "/noblur";
			}
			else //"watch" mode
				socket.emit(message.studentBlur, {number:this.student.number});
		}, false);
		if (assessment.mode == "watch")
		{
			window.addEventListener("focus", () => {
				if (this.stage != 2)
					return;
				socket.emit(message.studentFocus, {number:this.student.number});
			}, false);
		}
		window.addEventListener("resize", e => {
			if (this.stage != 2)
				return;
			if (assessment.mode == "secure")
			{
				this.sendAnswer();
				document.location.href = "/fullscreen";
			}
			else //"watch" mode
			{
				if (checkWindowSize())
					socket.emit(message.studentFullscreen, {number:this.student.number});
				else
					socket.emit(message.studentResize, {number:this.student.number});
			}
		}, false);
	},
	methods: {
		// In case of AJAX errors (not blur-ing)
		showWarning: function(message) {
			this.warnMsg = message;
			$("#warning").modal("open");
		},
		padWithZero: function(x) {
			if (x < 10)
				return "0" + x;
			return x;
		},
		// stage 0 --> 1
		getStudent: function() {
			$.ajax("/get/student", {
				method: "GET",
				data: {
					number: this.student.number,
					cid: assessment.cid,
				},
				dataType: "json",
				success: s => {
					if (!!s.errmsg)
						return this.showWarning(s.errmsg);
					this.stage = 1;
					this.student = s.student;
					Vue.nextTick( () => { Materialize.updateTextFields(); });
				},
			});
		},
		// stage 1 --> 0
		cancelStudent: function() {
			this.stage = 0;
		},
		// stage 1 --> 2 (get all questions, set password)
		startAssessment: function() {
			let initializeStage2 = paper => {
				$("#leftButton, #rightButton").hide();
				// Initialize structured answer(s) based on questions type and nesting (TODO: more general)
				
				// if display == "all" getQuestionS
				// otherwise get first question
				
				
				if (!!questions)
					assessment.questions = questions;
				this.answers.inputs = [ ];
				for (let q of assessment.questions)
					this.answers.inputs.push( _(q.options.length).times( _.constant(false) ) );
				if (!paper)
				{
					this.answers.indices = assessment.fixed
						? _.range(assessment.questions.length)
						: _.shuffle( _.range(assessment.questions.length) );
				}
				else
				{
					// Resuming
					let indices = paper.inputs.map( input => { return input.index; });
					let remainingIndices = _.difference( _.range(assessment.questions.length).map(String), indices );
					this.answers.indices = indices.concat( _.shuffle(remainingIndices) );
				}


				if (assessment.time > 0)
				{

// TODO: distinguish total exam time AND question time

					const deltaTime = !!paper ? Date.now() - paper.startTime : 0;
					this.remainingTime = assessment.time * 60 - Math.round(deltaTime / 1000);
					this.runTimer();
				}


				this.answers.index = !!paper ? paper.inputs.length : 0;
				this.answers.displayAll = assessment.display == "all";
				this.answers.showSolution = false;
				this.stage = 2;
			};
			if (assessment.mode == "open")
				return initializeStage2();
			$.ajax("/start/assessment", {
				method: "GET",
				data: {
					number: this.student.number,
					aid: assessment._id
				},
				dataType: "json",
				success: s => {
					if (!!s.errmsg)
						return this.showWarning(s.errmsg);
					if (!!s.paper)
					{
						// Resuming: receive stored answers + startTime
						this.student.password = s.paper.password;
						this.answers.inputs = s.paper.inputs.map( inp => { return inp.input; });
					}
					else
					{
						this.student.password = s.password;
						// Got password: students answers locked to this page until potential teacher
						// action (power failure, computer down, ...)
					}
					socket = io.connect("/", {
						query: "aid=" + assessment._id + "&number=" + this.student.number + "&password=" + this.student.password
					});
					socket.on(message.allAnswers, this.setAnswers);
					initializeStage2(s.questions, s.paper);
				},
			});
		},


		// stage 2
		runGlobalTimer: function() {
			if (assessment.time <= 0)
				return;
			let self = this;
			setInterval( function() {
				self.remainingTime--;
				if (self.remainingTime <= 0)
				{
					if (self.stage == 2)
						self.endAssessment();
					clearInterval(this);
				}
			}, 1000);
		},
		runQuestionTimer: function(idx) {
			if (assessment.questions[idx].time <= 0)
				return;
			let self = this; //TODO: question remaining time
			setInterval( function() {
				self.remainingTime--;
				if (self.remainingTime <= 0)
				{
					if (self.stage == 2)
						self.endAssessment();
					clearInterval(this);
				}
			}, 1000);
		},

//TODO: get question after sending answer

		// stage 2
		sendOneAnswer: function() {
			const realIndex = this.answers.indices[this.answers.index];
			let gotoNext = () => {
				if (this.answers.index == assessment.questions.length - 1)
					this.endAssessment();
				else
					this.answers.index++;
				this.$children[0].$forceUpdate(); //TODO: bad HACK, and shouldn't be required...
			};
			if (assessment.mode == "open")
				return gotoNext(); //only local
			let answerData = {
				aid: assessment._id,
				answer: JSON.stringify({
					index: realIndex.toString(),
					input: this.answers.inputs[realIndex]
						.map( (tf,i) => { return {val:tf,idx:i}; } )
						.filter( item => { return item.val; })
						.map( item => { return item.idx; })
				}),
				number: this.student.number,
				password: this.student.password,
			};
			$.ajax("/send/answer", {
				method: "GET",
				data: answerData,
				dataType: "json",
				success: ret => {
					if (!!ret.errmsg)
						return this.showWarning(ret.errmsg);
					gotoNext();
					socket.emit(message.newAnswer, answerData);
				},
			});
		},
		// TODO: I don't like that + sending should not be definitive in exam mode with display = all
		sendAnswer: function() {
			if (assessment.display == "one")
				this.sendOneAnswer();
			else
				assessment.questions.forEach(this.sendOneAnswer);
		},
		// stage 2 --> 3 (or 4)
		// from a message by statements component, or time over
		endAssessment: function() {
			// Set endTime, destroy password
			$("#leftButton, #rightButton").show();
			if (assessment.mode == "open")
			{
				this.stage = 4;
				this.answers.showSolution = true;
				this.answers.displayAll = true;
				return;
			}
			$.ajax("/end/assessment", {
				method: "GET",
				data: {
					aid: assessment._id,
					number: this.student.number,
					password: this.student.password,
				},
				dataType: "json",
				success: ret => {
					if (!!ret.errmsg)
						return this.showWarning(ret.errmsg);
					this.stage = 3;
					delete this.student["password"]; //unable to send new answers now
				},
			});
		},
		// stage 3 --> 4 (on socket message "feedback")
		setAnswers: function(m) {
			const answers = JSON.parse(m.answers);
			for (let i=0; i<answers.length; i++)
				assessment.questions[i].answer = answers[i];
			this.answers.showSolution = true;
			this.answers.displayAll = true;
			this.stage = 4;
			socket.disconnect();
			socket = null;
		},
	},
});
Commit	Line	Data
e99c53fb BA	1	let socket = null; //monitor answers in real time
e99c53fb BA	2
cc7c0f5e BA	3	if (assessment.mode == "secure" && !checkWindowSize())
cc7c0f5e BA	4	document.location.href= "/fullscreen";
e99c53fb	5
cc7c0f5e	6	function checkWindowSize()
e99c53fb	7	{
cc7c0f5e BA	8	// NOTE: temporarily accept smartphone (security hole: pretend being a smartphone on desktop browser...)
	9	if (navigator.userAgent.match(/(iPhone\|iPod\|iPad\|Android\|BlackBerry)/))
	10	return true;
f03a2ad9 BA	11	// 3 is arbitrary, but a small tolerance is required (e.g. in Firefox)
f03a2ad9 BA	12	return window.innerWidth >= screen.width-3 && window.innerHeight >= screen.height-3;
20c96143	13	}
e99c53fb	14
8a2b3260	15	new Vue({
e99c53fb BA	16	el: "#assessment",
	17	data: {
	18	assessment: assessment,
8a51dbf7 BA	19	answers: { }, //filled later with answering parameters
8a51dbf7 BA	20	student: { }, //filled later (name, password)
e99c53fb BA	21	// Stage 0: unauthenticated (number),
	22	// 1: authenticated (got a name, unvalidated)
	23	// 2: locked: password set, exam started
	24	// 3: completed
	25	// 4: show answers
a80c6a3b	26	remainingTime: assessment.time, //integer or array
e99c53fb	27	stage: assessment.mode != "open" ? 0 : 1,
f03a2ad9	28	warnMsg: "",
e99c53fb	29	},
e99c53fb BA	30	computed: {
e99c53fb BA	31	countdown: function() {
a80c6a3b BA	32	const remainingTime = assessment.display == "one" && _.isArray(assessment.time)
	33	? this.remainingTime[this.answers.index]
	34	: this.remainingTime;
	35	let seconds = remainingTime % 60;
	36	let minutes = Math.floor(remainingTime / 60);
e99c53fb BA	37	return this.padWithZero(minutes) + ":" + this.padWithZero(seconds);
	38	},
	39	},
f03a2ad9 BA	40	mounted: function() {
f03a2ad9 BA	41	$(".modal").modal();
20c96143 BA	42	if (["exam","open"].includes(assessment.mode))
20c96143 BA	43	return;
435371c7	44	window.addEventListener("blur", () => {
20c96143	45	if (this.stage != 2)
2bada710 BA	46	return;
	47	if (assessment.mode == "secure")
	48	{
a80c6a3b	49	this.sendAnswer();
2bada710 BA	50	document.location.href= "/noblur";
2bada710 BA	51	}
20c96143	52	else //"watch" mode
2bada710	53	socket.emit(message.studentBlur, {number:this.student.number});
435371c7	54	}, false);
20c96143	55	if (assessment.mode == "watch")
2bada710 BA	56	{
2bada710 BA	57	window.addEventListener("focus", () => {
20c96143	58	if (this.stage != 2)
2bada710 BA	59	return;
	60	socket.emit(message.studentFocus, {number:this.student.number});
	61	}, false);
	62	}
435371c7	63	window.addEventListener("resize", e => {
20c96143	64	if (this.stage != 2)
2bada710 BA	65	return;
	66	if (assessment.mode == "secure")
	67	{
a80c6a3b	68	this.sendAnswer();
20c96143	69	document.location.href = "/fullscreen";
2bada710	70	}
20c96143	71	else //"watch" mode
2bada710 BA	72	{
	73	if (checkWindowSize())
	74	socket.emit(message.studentFullscreen, {number:this.student.number});
	75	else
	76	socket.emit(message.studentResize, {number:this.student.number});
	77	}
435371c7	78	}, false);
f03a2ad9	79	},
e99c53fb	80	methods: {
a80c6a3b	81	// In case of AJAX errors (not blur-ing)
71d1ca9c	82	showWarning: function(message) {
f03a2ad9 BA	83	this.warnMsg = message;
	84	$("#warning").modal("open");
	85	},
e99c53fb BA	86	padWithZero: function(x) {
	87	if (x < 10)
	88	return "0" + x;
	89	return x;
	90	},
	91	// stage 0 --> 1
a80c6a3b	92	getStudent: function() {
e99c53fb BA	93	$.ajax("/get/student", {
	94	method: "GET",
	95	data: {
	96	number: this.student.number,
	97	cid: assessment.cid,
	98	},
	99	dataType: "json",
	100	success: s => {
	101	if (!!s.errmsg)
71d1ca9c	102	return this.showWarning(s.errmsg);
e99c53fb BA	103	this.stage = 1;
	104	this.student = s.student;
	105	Vue.nextTick( () => { Materialize.updateTextFields(); });
e99c53fb BA	106	},
	107	});
	108	},
	109	// stage 1 --> 0
	110	cancelStudent: function() {
	111	this.stage = 0;
	112	},
	113	// stage 1 --> 2 (get all questions, set password)
	114	startAssessment: function() {
a80c6a3b	115	let initializeStage2 = paper => {
e99c53fb	116	$("#leftButton, #rightButton").hide();
e99c53fb	117	// Initialize structured answer(s) based on questions type and nesting (TODO: more general)
a80c6a3b BA	118
	119	// if display == "all" getQuestionS
	120	// otherwise get first question
	121
	122
e99c53fb BA	123	if (!!questions)
e99c53fb BA	124	assessment.questions = questions;
8a51dbf7	125	this.answers.inputs = [ ];
e99c53fb	126	for (let q of assessment.questions)
71d1ca9c	127	this.answers.inputs.push( _(q.options.length).times( _.constant(false) ) );
f03a2ad9 BA	128	if (!paper)
f03a2ad9 BA	129	{
8a51dbf7	130	this.answers.indices = assessment.fixed
f03a2ad9 BA	131	? _.range(assessment.questions.length)
	132	: _.shuffle( _.range(assessment.questions.length) );
	133	}
	134	else
	135	{
	136	// Resuming
	137	let indices = paper.inputs.map( input => { return input.index; });
6bf4a38e	138	let remainingIndices = _.difference( _.range(assessment.questions.length).map(String), indices );
8a51dbf7	139	this.answers.indices = indices.concat( _.shuffle(remainingIndices) );
f03a2ad9	140	}
a80c6a3b BA	141
	142
	143
	144
	145
	146
	147
	148	if (assessment.time > 0)
	149	{
	150
	151	// TODO: distinguish total exam time AND question time
	152
	153	const deltaTime = !!paper ? Date.now() - paper.startTime : 0;
	154	this.remainingTime = assessment.time * 60 - Math.round(deltaTime / 1000);
	155	this.runTimer();
	156	}
	157
	158
8a51dbf7	159	this.answers.index = !!paper ? paper.inputs.length : 0;
3b8117c5 BA	160	this.answers.displayAll = assessment.display == "all";
3b8117c5 BA	161	this.answers.showSolution = false;
e99c53fb	162	this.stage = 2;
e99c53fb BA	163	};
	164	if (assessment.mode == "open")
	165	return initializeStage2();
	166	$.ajax("/start/assessment", {
	167	method: "GET",
	168	data: {
	169	number: this.student.number,
	170	aid: assessment._id
	171	},
	172	dataType: "json",
	173	success: s => {
	174	if (!!s.errmsg)
71d1ca9c	175	return this.showWarning(s.errmsg);
f03a2ad9 BA	176	if (!!s.paper)
	177	{
	178	// Resuming: receive stored answers + startTime
	179	this.student.password = s.paper.password;
8a51dbf7	180	this.answers.inputs = s.paper.inputs.map( inp => { return inp.input; });
f03a2ad9 BA	181	}
	182	else
	183	{
	184	this.student.password = s.password;
	185	// Got password: students answers locked to this page until potential teacher
	186	// action (power failure, computer down, ...)
	187	}
29c8b391	188	socket = io.connect("/", {
71d1ca9c	189	query: "aid=" + assessment._id + "&number=" + this.student.number + "&password=" + this.student.password
e5ec7dea BA	190	});
e5ec7dea BA	191	socket.on(message.allAnswers, this.setAnswers);
f03a2ad9	192	initializeStage2(s.questions, s.paper);
e99c53fb BA	193	},
	194	});
	195	},
20c96143 BA	196
20c96143 BA	197
e99c53fb	198	// stage 2
20c96143	199	runGlobalTimer: function() {
e99c53fb BA	200	if (assessment.time <= 0)
	201	return;
	202	let self = this;
	203	setInterval( function() {
	204	self.remainingTime--;
71d1ca9c BA	205	if (self.remainingTime <= 0)
	206	{
	207	if (self.stage == 2)
	208	self.endAssessment();
e99c53fb	209	clearInterval(this);
71d1ca9c	210	}
e99c53fb BA	211	}, 1000);
e99c53fb BA	212	},
20c96143 BA	213	runQuestionTimer: function(idx) {
	214	if (assessment.questions[idx].time <= 0)
	215	return;
	216	let self = this; //TODO: question remaining time
	217	setInterval( function() {
	218	self.remainingTime--;
	219	if (self.remainingTime <= 0)
	220	{
	221	if (self.stage == 2)
	222	self.endAssessment();
	223	clearInterval(this);
	224	}
	225	}, 1000);
	226	},
	227
	228	//TODO: get question after sending answer
	229
435371c7	230	// stage 2
9f4f3259	231	sendOneAnswer: function() {
71d1ca9c	232	const realIndex = this.answers.indices[this.answers.index];
435371c7	233	let gotoNext = () => {
71d1ca9c	234	if (this.answers.index == assessment.questions.length - 1)
8a51dbf7	235	this.endAssessment();
435371c7	236	else
71d1ca9c BA	237	this.answers.index++;
71d1ca9c BA	238	this.$children[0].$forceUpdate(); //TODO: bad HACK, and shouldn't be required...
435371c7 BA	239	};
	240	if (assessment.mode == "open")
	241	return gotoNext(); //only local
	242	let answerData = {
	243	aid: assessment._id,
	244	answer: JSON.stringify({
71d1ca9c BA	245	index: realIndex.toString(),
71d1ca9c BA	246	input: this.answers.inputs[realIndex]
435371c7 BA	247	.map( (tf,i) => { return {val:tf,idx:i}; } )
	248	.filter( item => { return item.val; })
	249	.map( item => { return item.idx; })
	250	}),
	251	number: this.student.number,
	252	password: this.student.password,
	253	};
	254	$.ajax("/send/answer", {
	255	method: "GET",
	256	data: answerData,
	257	dataType: "json",
	258	success: ret => {
	259	if (!!ret.errmsg)
71d1ca9c BA	260	return this.showWarning(ret.errmsg);
71d1ca9c BA	261	gotoNext();
435371c7 BA	262	socket.emit(message.newAnswer, answerData);
	263	},
	264	});
	265	},
9f4f3259 BA	266	// TODO: I don't like that + sending should not be definitive in exam mode with display = all
	267	sendAnswer: function() {
	268	if (assessment.display == "one")
4a4a6497	269	this.sendOneAnswer();
9f4f3259	270	else
4a4a6497	271	assessment.questions.forEach(this.sendOneAnswer);
9f4f3259	272	},
e99c53fb	273	// stage 2 --> 3 (or 4)
cc7c0f5e	274	// from a message by statements component, or time over
e99c53fb	275	endAssessment: function() {
cc7c0f5e	276	// Set endTime, destroy password
e99c53fb	277	$("#leftButton, #rightButton").show();
cc7c0f5e	278	if (assessment.mode == "open")
e99c53fb	279	{
e99c53fb	280	this.stage = 4;
3b8117c5	281	this.answers.showSolution = true;
29c8b391	282	this.answers.displayAll = true;
cc7c0f5e BA	283	return;
	284	}
	285	$.ajax("/end/assessment", {
	286	method: "GET",
	287	data: {
	288	aid: assessment._id,
	289	number: this.student.number,
	290	password: this.student.password,
	291	},
	292	dataType: "json",
	293	success: ret => {
	294	if (!!ret.errmsg)
71d1ca9c	295	return this.showWarning(ret.errmsg);
cc7c0f5e BA	296	this.stage = 3;
cc7c0f5e BA	297	delete this.student["password"]; //unable to send new answers now
cc7c0f5e BA	298	},
cc7c0f5e BA	299	});
e99c53fb BA	300	},
e99c53fb BA	301	// stage 3 --> 4 (on socket message "feedback")
71d1ca9c	302	setAnswers: function(m) {
29c8b391 BA	303	const answers = JSON.parse(m.answers);
	304	for (let i=0; i<answers.length; i++)
	305	assessment.questions[i].answer = answers[i];
3b8117c5	306	this.answers.showSolution = true;
29c8b391	307	this.answers.displayAll = true;
e99c53fb	308	this.stage = 4;
29c8b391 BA	309	socket.disconnect();
29c8b391 BA	310	socket = null;
e99c53fb BA	311	},
	312	},
	313	});