rating-graph.js

"use strict";
(function(){
$(window).load(init);

// const
const MARGIN_VAL_X = 86400 * 30;
const MARGIN_VAL_Y_LOW = 100;
const MARGIN_VAL_Y_HIGH = 300;
const OFFSET_X = 50;
const OFFSET_Y = 5;
const DEFAULT_WIDTH = 640;
var canvas_status = document.getElementById("ratingStatus");
const STATUS_WIDTH = canvas_status.width - OFFSET_X - 10;
const STATUS_HEIGHT = canvas_status.height - OFFSET_Y - 5;
var canvas_graph = document.getElementById("ratingGraph");
const PANEL_WIDTH = canvas_graph.width - OFFSET_X - 10;
const PANEL_HEIGHT = canvas_graph.height - OFFSET_Y - 30;
const HIGHEST_WIDTH = 80;
const HIGHEST_HEIGHT = 20;
const LABEL_FONT = "12px Lato";
const START_YEAR = 2010;
const MONTH_NAMES = ["Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"];
const YEAR_SEC = 86400*365;
const STEP_SIZE = 400;
const COLORS = [
	[0,    "#808080", 0.15],
	[400,  "#804000", 0.15],
	[800,  "#008000", 0.15],
	[1200, "#00C0C0", 0.2],
	[1600, "#0000FF", 0.1],
	[2000, "#C0C000", 0.25],
	[2400, "#FF8000", 0.2],
	[2800, "#FF0000", 0.1]
];
const STAR_MIN = 3200;
const PARTICLE_MIN = 3;
const PARTICLE_MAX = 20;
const LIFE_MAX = 30;
const EPS = 1e-9;

var cj = createjs;
var stage_graph, stage_status;

// graph
var panel_shape, border_shape;
var chart_container, line_shape, vertex_shapes, highest_shape;
var n, x_min, x_max, y_min, y_max;

// status
var border_status_shape;
var rating_text, place_text, diff_text, date_text, contest_name_text;
var particles;
var standings_url;

function initStage(stage, canvas) {
	var width = canvas.getAttribute('width');
	var height = canvas.getAttribute('height');
	if (window.devicePixelRatio) {
		canvas.setAttribute('width', Math.round(width * window.devicePixelRatio));
		canvas.setAttribute('height', Math.round(height * window.devicePixelRatio));
		stage.scaleX = stage.scaleY = window.devicePixelRatio;
	}
	canvas.style.maxWidth = width+"px";
	canvas.style.maxHeight = height+"px";
	canvas.style.width = canvas.style.height = "100%";
	stage.enableMouseOver();
}

function newShape(parent) {
	var s = new cj.Shape();
	parent.addChild(s);
	return s;
}

function newText(parent, x, y, font) {
	var t = new cj.Text("", font, "#000");
	t.x = x;
	t.y = y;
	t.textAlign = "center";
	t.textBaseline = "middle";
	parent.addChild(t);
	return t;
}

function init() {
	n = rating_history.length;
	if (n == 0) return;

	stage_graph = new cj.Stage("ratingGraph");
	stage_status = new cj.Stage("ratingStatus");
	initStage(stage_graph, canvas_graph);
	initStage(stage_status, canvas_status);

	x_min = 100000000000;
	x_max = 0;
	y_min = 10000;
	y_max = 0;
	for (var i = 0; i < n; i++) {
		x_min = Math.min(x_min, rating_history[i].EndTime);
		x_max = Math.max(x_max, rating_history[i].EndTime);
		y_min = Math.min(y_min, rating_history[i].NewRating);
		y_max = Math.max(y_max, rating_history[i].NewRating);
	}
	x_min -= MARGIN_VAL_X;
	x_max += MARGIN_VAL_X;
	y_min = Math.min(1500, Math.max(0, y_min - MARGIN_VAL_Y_LOW));
	y_max += MARGIN_VAL_Y_HIGH;

	initBackground();
	initChart();
	stage_graph.update();
	initStatus();
	stage_status.update();

	cj.Ticker.setFPS(60);
	cj.Ticker.addEventListener("tick", handleTick);

	function handleTick(event) {
		updateParticles();
		stage_status.update();
	}
}

function getPer(x, l, r) {
	return (x - l) / (r - l);
}

function getColor(x) {
	for (var i = COLORS.length - 1; i >= 0; i--) {
		if (x >= COLORS[i][0]) return COLORS[i];
	}
	return [-1, "#000000", 0.1];
}

function initBackground() {
	panel_shape = newShape(stage_graph);
	panel_shape.x = OFFSET_X;
	panel_shape.y = OFFSET_Y;
	panel_shape.alpha = 0.3;
	border_shape = newShape(stage_graph);
	border_shape.x = OFFSET_X;
	border_shape.y = OFFSET_Y;

	function newLabelY(s, y) {
		var t = new cj.Text(s, LABEL_FONT, "#000");
		t.x = OFFSET_X - 10;
		t.y = OFFSET_Y + y;
		t.textAlign = "right";
		t.textBaseline = "middle";
		stage_graph.addChild(t);
	}

	function newLabelX(s, x, y) {
		var t = new cj.Text(s, LABEL_FONT, "#000");
		t.x = OFFSET_X + x;
		t.y = OFFSET_Y + PANEL_HEIGHT + 2 + y;
		t.textAlign = "center";
		t.textBaseline = "top";
		stage_graph.addChild(t);
	}
	var y1 = 0;
	for (var i = COLORS.length - 1; i >= 0; i--) {
		var y2 = PANEL_HEIGHT - PANEL_HEIGHT * getPer(COLORS[i][0], y_min, y_max);
		if (y2 > 0 && y1 < PANEL_HEIGHT) {
			y1 = Math.max(y1, 0);
			panel_shape.graphics.f(COLORS[i][1]).r(0, y1, PANEL_WIDTH, Math.min(y2, PANEL_HEIGHT) - y1);
		}
		y1 = y2;
	}
	for (var i = 0; i <= y_max; i += STEP_SIZE) {
		if (i >= y_min) {
			var y = PANEL_HEIGHT - PANEL_HEIGHT * getPer(i, y_min, y_max);
			newLabelY(String(i), y);
			border_shape.graphics.s("#FFF").ss(0.5);
			if (i == 2000) border_shape.graphics.s("#000");
			border_shape.graphics.mt(0, y).lt(PANEL_WIDTH, y);
		}
	}
	border_shape.graphics.s("#FFF").ss(0.5);
	
	var month_step = 6;
	for (var i = 3; i >= 1; i--) {
		if (x_max-x_min <= YEAR_SEC*i + MARGIN_VAL_X*2) month_step = i;
	}
	var first_flag = true;
	for (var i = START_YEAR; i < 3000; i++) {
		var break_flag = false;
		for (var j = 0; j < 12; j += month_step) {
			var month = ('00' + (j+1)).slice(-2);
			var unix = Date.parse(String(i)+"-"+month+"-01T00:00:00")/1000;
			if (x_min < unix && unix < x_max) {
				var x = PANEL_WIDTH * getPer(unix, x_min, x_max);
				if (j == 0 || first_flag) {
					newLabelX(MONTH_NAMES[j], x, 0);
					newLabelX(String(i), x, 13);
					first_flag = false;
				} else {
					newLabelX(MONTH_NAMES[j], x, 0);
				}
				border_shape.graphics.mt(x, 0).lt(x, PANEL_HEIGHT)
			}
			if (unix > x_max) { break_flag = true; break;}
		}
		if (break_flag) break;
	}
	border_shape.graphics.s("#888").ss(1.5).rr(0, 0, PANEL_WIDTH, PANEL_HEIGHT, 2);
}

function initChart() {
	chart_container = new cj.Container();
	stage_graph.addChild(chart_container);
	chart_container.shadow = new cj.Shadow("rgba(0,0,0,0.3)", 1, 2, 3);

	line_shape = newShape(chart_container);
	highest_shape = newShape(chart_container);
	vertex_shapes = new Array();

	function mouseoverVertex(e) {
		vertex_shapes[e.target.i].scaleX = vertex_shapes[e.target.i].scaleY = 1.2;
		stage_graph.update();
		setStatus(rating_history[e.target.i], true);
	};

	function mouseoutVertex(e) {
		vertex_shapes[e.target.i].scaleX = vertex_shapes[e.target.i].scaleY = 1;
		stage_graph.update();
	};
	var highest_i = 0;
	for (var i = 0; i < n; i++) {
		if (rating_history[highest_i].NewRating < rating_history[i].NewRating) {
			highest_i = i;
		}
	}
	for (var i = 0; i < n; i++) {
		vertex_shapes.push(newShape(chart_container));
		vertex_shapes[i].graphics.s("#FFF");
		if (i == highest_i) vertex_shapes[i].graphics.s("#000");
		vertex_shapes[i].graphics.ss(0.5).f(getColor(rating_history[i].NewRating)[1]).dc(0, 0, 3.5);
		vertex_shapes[i].x = OFFSET_X + PANEL_WIDTH * getPer(rating_history[i].EndTime, x_min, x_max);
		vertex_shapes[i].y = OFFSET_Y + (PANEL_HEIGHT - PANEL_HEIGHT * getPer(rating_history[i].NewRating, y_min, y_max));
		vertex_shapes[i].i = i;
		var hitArea = new cj.Shape();
		hitArea.graphics.f("#000").dc(1.5, 1.5, 6);
		vertex_shapes[i].hitArea = hitArea;
		vertex_shapes[i].addEventListener("mouseover", mouseoverVertex);
		vertex_shapes[i].addEventListener("mouseout", mouseoutVertex);
	}
	{
		var dx = 80;
		if ((x_min + x_max)/2 < rating_history[highest_i].EndTime) dx = -80;
		var x = vertex_shapes[highest_i].x + dx;
		var y = vertex_shapes[highest_i].y - 16;
		highest_shape.graphics.s("#FFF").mt(vertex_shapes[highest_i].x, vertex_shapes[highest_i].y).lt(x, y);
		highest_shape.graphics.s("#888").f("#FFF").rr(x - HIGHEST_WIDTH/2, y - HIGHEST_HEIGHT/2, HIGHEST_WIDTH, HIGHEST_HEIGHT, 2);
		highest_shape.i = highest_i;
		var highest_text = newText(stage_graph, x, y, "12px Lato");
		highest_text.text = "Highest: " + rating_history[highest_i].NewRating;
		highest_shape.addEventListener("mouseover", mouseoverVertex);
		highest_shape.addEventListener("mouseout", mouseoutVertex);
	}
	for (var j = 0; j < 2; j++) {
		if (j == 0) line_shape.graphics.s("#AAA").ss(2);
		else line_shape.graphics.s("#FFF").ss(0.5);
		line_shape.graphics.mt(vertex_shapes[0].x, vertex_shapes[0].y);
		for (var i = 0; i < n; i++) {
			line_shape.graphics.lt(vertex_shapes[i].x, vertex_shapes[i].y);
		}
	}
}

function initStatus() {
	border_status_shape = newShape(stage_status);
	rating_text = newText(stage_status, OFFSET_X + 80, OFFSET_Y + STATUS_HEIGHT / 2, "48px 'Squada One'");
	place_text = newText(stage_status, OFFSET_X + 160, OFFSET_Y + STATUS_HEIGHT / 2.7, "16px Lato");
	diff_text = newText(stage_status, OFFSET_X + 160, OFFSET_Y + STATUS_HEIGHT / 1.5, "11px Lato");
	diff_text.color = '#888';
	date_text = newText(stage_status, OFFSET_X + 200, OFFSET_Y + STATUS_HEIGHT / 4, "14px Lato");
	contest_name_text = newText(stage_status, OFFSET_X + 200, OFFSET_Y + STATUS_HEIGHT / 1.6, "20px Lato");
	date_text.textAlign = contest_name_text.textAlign = "left";
	contest_name_text.maxWidth = STATUS_WIDTH - 200 - 10;
	{
		var hitArea = new cj.Shape(); hitArea.graphics.f("#000").r(0,-12,contest_name_text.maxWidth,24);
		contest_name_text.hitArea = hitArea;
		contest_name_text.cursor = "pointer";
		contest_name_text.addEventListener("click", function(){
			location.href = standings_url;
		});
	}
	particles = new Array();
	for (var i = 0; i < PARTICLE_MAX; i++) {
		particles.push(newText(stage_status, 0, 0, "64px Lato"));
		particles[i].visible = false;
	}
	setStatus(rating_history[rating_history.length-1], false);
}

function getRatingPer(x) {
	var pre = COLORS[COLORS.length-1][0] + STEP_SIZE;
	for (var i = COLORS.length - 1; i >= 0; i--) {
		if (x >= COLORS[i][0]) return (x - COLORS[i][0]) / (pre - COLORS[i][0]);
		pre = COLORS[i][0];
	}
	return 0;
}

function getOrdinal(x) {
	var s = ["th", "st", "nd", "rd"], v = x % 100;
	return x + (s[(v - 20) % 10] || s[v] || s[0]);
}
function getDiff(x) {
	var sign = x==0?'±':(x<0?'-':'+');
	return sign + Math.abs(x);
}

function setStatus(data, particle_flag) {
	var date = new Date(data.EndTime * 1000);
	var rating = data.NewRating, old_rating = data.OldRating;
	var place = data.Place;
	var contest_name = data.ContestName;
	var tmp = getColor(rating); var color = tmp[1], alpha = tmp[2];
	border_status_shape.graphics.c().s(color).ss(1).rr(OFFSET_X, OFFSET_Y, STATUS_WIDTH, STATUS_HEIGHT, 2);
	rating_text.text = rating;
	rating_text.color = color;
	place_text.text = getOrdinal(place);
	diff_text.text = getDiff(rating-old_rating);
	date_text.text = date.toLocaleDateString();
	contest_name_text.text = contest_name;
	if (particle_flag) {
		var particle_num = parseInt(Math.pow(getRatingPer(rating), 2) * (PARTICLE_MAX - PARTICLE_MIN) + PARTICLE_MIN);
		setParticles(particle_num, color, alpha, rating);
	}
	standings_url = data.StandingsUrl;
}

function setParticle(particle, x, y, color, alpha, star_flag) {
	particle.x = x;
	particle.y = y;
	var ang = Math.random() * Math.PI * 2;
	var speed = Math.random() * 4 + 4;
	particle.vx = Math.cos(ang) * speed;
	particle.vy = Math.sin(ang) * speed;
	particle.rot_speed = Math.random()*20+10;
	particle.life = LIFE_MAX;
	particle.visible = true;
	particle.color = color;
	if (star_flag) {
		particle.text = "★";
	} else {
		particle.text = "@";
	}
	particle.alpha = alpha;
}

function setParticles(num, color, alpha, rating) {
	for (var i = 0; i < PARTICLE_MAX; i++) {
		if (i < num) {
			setParticle(particles[i], rating_text.x, rating_text.y, color, alpha, rating >= STAR_MIN);
		} else {
			particles[i].life = 0;
			particles[i].visible = false;
		}
	}
}

function updateParticle(particle) {
	if (particle.life <= 0) {
		particle.visible = false;
		return;
	}
	particle.x += particle.vx;
	particle.vx *= 0.9;
	particle.y += particle.vy;
	particle.vy *= 0.9;
	particle.life--;
	particle.scaleX = particle.scaleY = particle.life / LIFE_MAX;
	particle.rotation += particle.rot_speed;
}

function updateParticles() {
	for (var i = 0; i < PARTICLE_MAX; i++) {
		if (particles[i].life > 0) {
			updateParticle(particles[i]);
		}
	}
}

$('#rating-graph-expand').click(function() {
	canvas_status.style.maxWidth = canvas_status.style.maxHeight = "";
	canvas_graph.style.maxWidth = canvas_graph.style.maxHeight = "";
	$(this).css('cssText', 'display: none !important;');
});
})();