filter by course and metro

public/app.css

@@ -12,3 +12,6 @@ th, td {
 	padding:10px;
 	text-align: center;
 }
+li {
+	display:inline;
+}

public/app.js

@@ -7,6 +7,8 @@ const parseTime = d3.timeParse("%B %e, %Y");
 let instances;
 let xScale, yScale;
 let highlighted = []
+const courses = [];
+const metros = [];
 
 const randomColor = ()=>{
 	const red = Math.floor(Math.random()*128) + 64;
@@ -61,27 +63,36 @@ const renderPoints = () => {
 		.append('circle');
 
 	d3.selectAll('circle')
-		.attr('cy', (datum, index) => yScale(datum.ninety_day_outcomes/datum.graduates*100) );
-
-	d3.selectAll('circle')
-		.attr('cx', (datum, index) => xScale(parseTime(datum.graduation_date)) );
-
-	d3.selectAll('circle')
+		.attr('cy', (datum, index) => yScale(datum.ninety_day_outcomes/datum.graduates*100) )
+		.attr('cx', (datum, index) => xScale(parseTime(datum.graduation_date)) )
 		.attr('fill', datum => datum.color? datum.color : 'black')
 		.attr('r', datum => datum.color? 10 : 5)
-
-	d3.selectAll('circle').on('click', (event, datum) => {
-		const found = highlighted.find(i => i.instance_id === datum.instance_id)
-		if(found === undefined){
-			datum.color = randomColor()
-			highlighted.push(datum)
-		} else {
-			delete datum.color
-			highlighted = highlighted.filter(i => i.instance_id != datum.instance_id)
-		}
-		renderPoints()
-		renderTable()
-	});
+		.style('display', (datum)=>{
+			const instanceMetro = datum.course.split('-')[0]
+			const instanceCourse = datum.course.split('-')[1]
+			
+			const metro = metros.find(m => m.metro === instanceMetro)
+			const course = courses.find(c => c.course === instanceCourse)
+
+			if(metro.checked && course.checked){
+				return 'block'
+			} else {
+				return 'none'
+			}
+		})
+		.on('click', (event, datum) => {
+			const found = highlighted.find(i => i.instance_id === datum.instance_id)
+
+			if(found === undefined){
+				datum.color = randomColor()
+				highlighted.push(datum)
+			} else {
+				delete datum.color
+				highlighted = highlighted.filter(i => i.instance_id != datum.instance_id)
+			}
+			renderPoints()
+			renderTable()
+		});
 
 }
 
@@ -135,8 +146,47 @@ const createFormSubmissionHandler = () => {
 	});
 }
 
+const populateMetrosCoursesCheckboxes = ()=>{
+	for(let instance of instances){
+		const segments = instance.course.split('-')
+
+		if(metros.find(m => m.metro === segments[0]) === undefined){
+			metros.push({ checked:true, metro: segments[0] })
+		}
+
+		if(courses.find(c => c.course === segments[1]) === undefined){
+			courses.push({ checked:true, course: segments[1] })
+		}
+
+	}
+	d3.select('#courses')
+		.selectAll('li')
+		.data(courses)
+		.enter()
+		.append('li').text(d => d.course)
+		.append('input').attr('type', 'checkbox')
+		.property('checked', d => d.checked)
+		.on('click', (event, datum)=>{
+			datum.checked = !datum.checked
+			renderPoints()
+		})
+
+	d3.select('#metros')
+		.selectAll('li')
+		.data(metros)
+		.enter()
+		.append('li').text(d => d.metro)
+		.append('input').attr('type', 'checkbox')
+		.property('checked', d => d.checked)
+		.on('click', (event, datum)=>{
+			datum.checked = !datum.checked
+			renderPoints()
+		})
+}
+
 window.onload = async ()=>{
 	instances = await d3.json('/instances');
+	populateMetrosCoursesCheckboxes();
 	setupGraph();
 	createAxes();
 	renderPoints();

public/index.html

@@ -18,6 +18,10 @@
 				<dt>Y-Axis:</dt>
 				<dd>Percentage of graduates that got a job within 90 days of graduation.</dd>
 			</dl>
+			<h3>Choose Metros To Display</h3>
+			<ul id="metros"></ul>
+			<h3>Choose CoursesTo Display</h3>
+			<ul id="courses"></ul>
 			<svg id="container">
 				<svg>
 					<g id="points"></g>