Initial commit

.gitignore

@@ -0,0 +1 @@
+node_modules

data.js

@@ -0,0 +1,184 @@
+const requestp = require('request-promise-native');
+
+const {makeCached} = require('./util');
+
+const OVERPASS_ENDPOINT = 'https://lz4.overpass-api.de/api/interpreter';
+
+const fetchLineData = makeCached(async (lineRef) =>
+{
+    // Retrieve routes, ways and stops from OpenStreetMap
+    const rawData = await requestp.post(OVERPASS_ENDPOINT, {form: `\
+data=[out:json];
+
+// Find the public transport line bearing the requested reference
+relation[network="TaM"][type="route_master"][ref="${lineRef}"];
+
+// Recursively fetch routes, ways and stops inside the line
+(._; >>;);
+
+out body qt;
+    `});
+
+    const elementsList = JSON.parse(rawData).elements;
+
+    // Extract all routes for the given line
+    const rawRoutes = elementsList.filter(elt =>
+        elt.type === 'relation'
+        && elt.tags.type === 'route'
+        && elt.tags.ref === lineRef
+    );
+
+    // If no route is found, assume the line does not exist
+    if (rawRoutes.length === 0)
+    {
+        return null;
+    }
+
+    // Index retrieved objects by their ID
+    const elements = elementsList.reduce((prev, elt) =>
+    {
+        prev[elt.id] = elt;
+        return prev;
+    }, {});
+
+    const color = rawRoutes[0].tags.colour || '#000000';
+
+    // Extract stops for each route of the line
+    const routes = rawRoutes.map(route => ({
+        from: route.tags.from,
+        to: route.tags.to,
+
+        // Retrieve each stop’s information (stop order in the relation is
+        // assumed to reflect reality)
+        stops: route.members
+            .filter(({role}) => role === 'stop')
+            .map(({ref}) => {
+                const elt = elements[ref];
+                return {
+                    id: ref,
+                    lat: elt.lat,
+                    lon: elt.lon,
+                    name: elt.tags.name,
+                };
+            }),
+
+        // List of ways making up the route (raw)
+        rawWays: route.members
+            .filter(({role}) => role === '')
+            .map(({ref}) => ref)
+    }));
+
+    // Process ways in each route to sort and merge them
+    for (let route of routes)
+    {
+        const {from, to, stops, rawWays} = route;
+
+        // Construct a graph with all connected nodes
+        const nodeNeighbors = new Map();
+
+        for (let id of rawWays)
+        {
+            const {type, nodes} = elements[id];
+
+            if (type === 'way' && nodes.length >= 1)
+            {
+                let previousNode = nodes[0];
+
+                if (!nodeNeighbors.has(previousNode))
+                {
+                    nodeNeighbors.set(previousNode, new Set());
+                }
+
+                for (let node of nodes.slice(1))
+                {
+                    if (!nodeNeighbors.has(node))
+                    {
+                        nodeNeighbors.set(node, new Set([previousNode]));
+                    }
+                    else
+                    {
+                        nodeNeighbors.get(node).add(previousNode);
+                    }
+
+                    nodeNeighbors.get(previousNode).add(node);
+                    previousNode = node;
+                }
+            }
+        }
+
+        // Find way from first stop through the end using DFS
+        const numberOfStops = stops.length;
+        const ways = [];
+
+        let currentStopIndex = 0;
+
+        while (currentStopIndex + 1 < numberOfStops)
+        {
+            const currentStop = stops[currentStopIndex];
+            const nextStop = stops[currentStopIndex + 1];
+
+            const visited = new Set();
+            const stack = [{
+                currentNode: currentStop.id,
+                way: [currentStop.id],
+            }];
+
+            let found = false;
+
+            while (stack.length !== 0)
+            {
+                const {currentNode, way} = stack.pop();
+                visited.add(currentNode);
+
+                if (currentNode === nextStop.id)
+                {
+                    // Arrived at next stop
+                    ways.push(way);
+                    found = true;
+                    break;
+                }
+
+                const neighbors = nodeNeighbors.get(currentNode) || [];
+
+                for (let nextNode of neighbors)
+                {
+                    if (!visited.has(nextNode))
+                    {
+                        stack.push({
+                            currentNode: nextNode,
+                            way: way.concat([nextNode]),
+                        });
+                    }
+                }
+            }
+
+            if (!found)
+            {
+                throw new Error(`No way between stop “${currentStop.name}” \
+(${currentStop.id}) and stop “${nextStop.name}” (${nextStop.id}) on line \
+${lineRef}’s route from “${from}” to “${to}”`);
+            }
+
+            ++currentStopIndex;
+        }
+
+        // Only keep geo coordinates for each way node
+        route.ways = ways.map(way =>
+            way.map(id =>
+            {
+                const node = elements[id];
+                return {lat: node.lat, lon: node.lon};
+            })
+        );
+
+        delete route.rawWays;
+    }
+
+    return {
+        ref: lineRef,
+        color,
+        routes
+    };
+});
+
+exports.fetchLineData = fetchLineData;

front/index.html

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+<!doctype html>
+<html>
+    <head>
+        <meta charset="utf-8">
+        <title>TaM</title>
+
+        <link rel="stylesheet" href="leaflet.css">
+
+        <style>
+            body, html
+            {
+                padding: 0;
+                margin: 0;
+                height: 100%;
+            }
+
+            #map
+            {
+                width: 100%;
+                height: 100%;
+            }
+        </style>
+    </head>
+    <body>
+        <div id="map"></div>
+
+        <script src="leaflet.js"></script>
+        <script src="index.js"></script>
+    </body>
+</html>

front/index.js

@@ -0,0 +1,59 @@
+// MAP
+const map = L.map('map').setView([43.610, 3.8612], 21);
+
+L.tileLayer('https://api.mapbox.com/styles/v1/{id}/tiles/{z}/{x}/{y}?access_token={accessToken}', {
+    attribution: [
+        // TODO: Attribution des données TaM
+        `Données cartographiques © Contributeurs d’<a href="https://www.open\
+streetmap.org/">OpenStreetMap</a>, <a href="https://creativecommons.org/\
+licenses/by-sa/2.0/">CC-BY-SA</a>`,
+        'Imagerie © <a href="https://www.mapbox.com/">Mapbox</a>',
+    ].join(' | '),
+    maxZoom: 18,
+    tileSize: 512,
+    zoomOffset: -1,
+    id: 'mapbox/streets-v11',
+    accessToken: 'pk.eyJ1IjoibWF0dGVvZGVsYWJyZSIsImEiOiJjazUxaWNsdXcwdWhjM29tc2xndXJoNGtxIn0.xELwMerqJLFimIqU6RxnZw'
+}).addTo(map);
+
+// </MAP>
+//
+// TAM
+
+
+const SERVER = 'http://localhost:3000';
+
+fetch(SERVER + '/line/6').then(res => res.json()).then(line =>
+{
+    const color = line.color;
+
+    line.routes.forEach(route =>
+    {
+        route.ways.forEach(way =>
+        {
+            const wayPoints = way.map(({lat, lon}) => [lat, lon]);
+
+            L.polyline(wayPoints, {weight: 8, color: '#888'}).addTo(map);
+            L.polyline(wayPoints, {weight: 6, color}).addTo(map);
+        });
+    });
+
+    line.routes.forEach(route =>
+    {
+        route.stops.forEach(stop =>
+        {
+            const stopMarker = L.circleMarker(
+                [stop.lat, stop.lon],
+                {
+                    fillColor: color,
+                    radius: 6,
+                    fillOpacity: 1,
+                    color: '#888',
+                    weight: 2
+                }
+            ).addTo(map);
+
+            stopMarker.bindPopup(stop.name);
+        });
+    });
+});

front/leaflet.css

@@ -0,0 +1,640 @@
+/* required styles */
+
+.leaflet-pane,
+.leaflet-tile,
+.leaflet-marker-icon,
+.leaflet-marker-shadow,
+.leaflet-tile-container,
+.leaflet-pane > svg,
+.leaflet-pane > canvas,
+.leaflet-zoom-box,
+.leaflet-image-layer,
+.leaflet-layer {
+	position: absolute;
+	left: 0;
+	top: 0;
+	}
+.leaflet-container {
+	overflow: hidden;
+	}
+.leaflet-tile,
+.leaflet-marker-icon,
+.leaflet-marker-shadow {
+	-webkit-user-select: none;
+	   -moz-user-select: none;
+	        user-select: none;
+	  -webkit-user-drag: none;
+	}
+/* Prevents IE11 from highlighting tiles in blue */
+.leaflet-tile::selection {
+	background: transparent;
+}
+/* Safari renders non-retina tile on retina better with this, but Chrome is worse */
+.leaflet-safari .leaflet-tile {
+	image-rendering: -webkit-optimize-contrast;
+	}
+/* hack that prevents hw layers "stretching" when loading new tiles */
+.leaflet-safari .leaflet-tile-container {
+	width: 1600px;
+	height: 1600px;
+	-webkit-transform-origin: 0 0;
+	}
+.leaflet-marker-icon,
+.leaflet-marker-shadow {
+	display: block;
+	}
+/* .leaflet-container svg: reset svg max-width decleration shipped in Joomla! (joomla.org) 3.x */
+/* .leaflet-container img: map is broken in FF if you have max-width: 100% on tiles */
+.leaflet-container .leaflet-overlay-pane svg,
+.leaflet-container .leaflet-marker-pane img,
+.leaflet-container .leaflet-shadow-pane img,
+.leaflet-container .leaflet-tile-pane img,
+.leaflet-container img.leaflet-image-layer,
+.leaflet-container .leaflet-tile {
+	max-width: none !important;
+	max-height: none !important;
+	}
+
+.leaflet-container.leaflet-touch-zoom {
+	-ms-touch-action: pan-x pan-y;
+	touch-action: pan-x pan-y;
+	}
+.leaflet-container.leaflet-touch-drag {
+	-ms-touch-action: pinch-zoom;
+	/* Fallback for FF which doesn't support pinch-zoom */
+	touch-action: none;
+	touch-action: pinch-zoom;
+}
+.leaflet-container.leaflet-touch-drag.leaflet-touch-zoom {
+	-ms-touch-action: none;
+	touch-action: none;
+}
+.leaflet-container {
+	-webkit-tap-highlight-color: transparent;
+}
+.leaflet-container a {
+	-webkit-tap-highlight-color: rgba(51, 181, 229, 0.4);
+}
+.leaflet-tile {
+	filter: inherit;
+	visibility: hidden;
+	}
+.leaflet-tile-loaded {
+	visibility: inherit;
+	}
+.leaflet-zoom-box {
+	width: 0;
+	height: 0;
+	-moz-box-sizing: border-box;
+	     box-sizing: border-box;
+	z-index: 800;
+	}
+/* workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=888319 */
+.leaflet-overlay-pane svg {
+	-moz-user-select: none;
+	}
+
+.leaflet-pane         { z-index: 400; }
+
+.leaflet-tile-pane    { z-index: 200; }
+.leaflet-overlay-pane { z-index: 400; }
+.leaflet-shadow-pane  { z-index: 500; }
+.leaflet-marker-pane  { z-index: 600; }
+.leaflet-tooltip-pane   { z-index: 650; }
+.leaflet-popup-pane   { z-index: 700; }
+
+.leaflet-map-pane canvas { z-index: 100; }
+.leaflet-map-pane svg    { z-index: 200; }
+
+.leaflet-vml-shape {
+	width: 1px;
+	height: 1px;
+	}
+.lvml {
+	behavior: url(#default#VML);
+	display: inline-block;
+	position: absolute;
+	}
+
+
+/* control positioning */
+
+.leaflet-control {
+	position: relative;
+	z-index: 800;
+	pointer-events: visiblePainted; /* IE 9-10 doesn't have auto */
+	pointer-events: auto;
+	}
+.leaflet-top,
+.leaflet-bottom {
+	position: absolute;
+	z-index: 1000;
+	pointer-events: none;
+	}
+.leaflet-top {
+	top: 0;
+	}
+.leaflet-right {
+	right: 0;
+	}
+.leaflet-bottom {
+	bottom: 0;
+	}
+.leaflet-left {
+	left: 0;
+	}
+.leaflet-control {
+	float: left;
+	clear: both;
+	}
+.leaflet-right .leaflet-control {
+	float: right;
+	}
+.leaflet-top .leaflet-control {
+	margin-top: 10px;
+	}
+.leaflet-bottom .leaflet-control {
+	margin-bottom: 10px;
+	}
+.leaflet-left .leaflet-control {
+	margin-left: 10px;
+	}
+.leaflet-right .leaflet-control {
+	margin-right: 10px;
+	}
+
+
+/* zoom and fade animations */
+
+.leaflet-fade-anim .leaflet-tile {
+	will-change: opacity;
+	}
+.leaflet-fade-anim .leaflet-popup {
+	opacity: 0;
+	-webkit-transition: opacity 0.2s linear;
+	   -moz-transition: opacity 0.2s linear;
+	        transition: opacity 0.2s linear;
+	}
+.leaflet-fade-anim .leaflet-map-pane .leaflet-popup {
+	opacity: 1;
+	}
+.leaflet-zoom-animated {
+	-webkit-transform-origin: 0 0;
+	    -ms-transform-origin: 0 0;
+	        transform-origin: 0 0;
+	}
+.leaflet-zoom-anim .leaflet-zoom-animated {
+	will-change: transform;
+	}
+.leaflet-zoom-anim .leaflet-zoom-animated {
+	-webkit-transition: -webkit-transform 0.25s cubic-bezier(0,0,0.25,1);
+	   -moz-transition:    -moz-transform 0.25s cubic-bezier(0,0,0.25,1);
+	        transition:         transform 0.25s cubic-bezier(0,0,0.25,1);
+	}
+.leaflet-zoom-anim .leaflet-tile,
+.leaflet-pan-anim .leaflet-tile {
+	-webkit-transition: none;
+	   -moz-transition: none;
+	        transition: none;
+	}
+
+.leaflet-zoom-anim .leaflet-zoom-hide {
+	visibility: hidden;
+	}
+
+
+/* cursors */
+
+.leaflet-interactive {
+	cursor: pointer;
+	}
+.leaflet-grab {
+	cursor: -webkit-grab;
+	cursor:    -moz-grab;
+	cursor:         grab;
+	}
+.leaflet-crosshair,
+.leaflet-crosshair .leaflet-interactive {
+	cursor: crosshair;
+	}
+.leaflet-popup-pane,
+.leaflet-control {
+	cursor: auto;
+	}
+.leaflet-dragging .leaflet-grab,
+.leaflet-dragging .leaflet-grab .leaflet-interactive,
+.leaflet-dragging .leaflet-marker-draggable {
+	cursor: move;
+	cursor: -webkit-grabbing;
+	cursor:    -moz-grabbing;
+	cursor:         grabbing;
+	}
+
+/* marker & overlays interactivity */
+.leaflet-marker-icon,
+.leaflet-marker-shadow,
+.leaflet-image-layer,
+.leaflet-pane > svg path,
+.leaflet-tile-container {
+	pointer-events: none;
+	}
+
+.leaflet-marker-icon.leaflet-interactive,
+.leaflet-image-layer.leaflet-interactive,
+.leaflet-pane > svg path.leaflet-interactive,
+svg.leaflet-image-layer.leaflet-interactive path {
+	pointer-events: visiblePainted; /* IE 9-10 doesn't have auto */
+	pointer-events: auto;
+	}
+
+/* visual tweaks */
+
+.leaflet-container {
+	background: #ddd;
+	outline: 0;
+	}
+.leaflet-container a {
+	color: #0078A8;
+	}
+.leaflet-container a.leaflet-active {
+	outline: 2px solid orange;
+	}
+.leaflet-zoom-box {
+	border: 2px dotted #38f;
+	background: rgba(255,255,255,0.5);
+	}
+
+
+/* general typography */
+.leaflet-container {
+	font: 12px/1.5 "Helvetica Neue", Arial, Helvetica, sans-serif;
+	}
+
+
+/* general toolbar styles */
+
+.leaflet-bar {
+	box-shadow: 0 1px 5px rgba(0,0,0,0.65);
+	border-radius: 4px;
+	}
+.leaflet-bar a,
+.leaflet-bar a:hover {
+	background-color: #fff;
+	border-bottom: 1px solid #ccc;
+	width: 26px;
+	height: 26px;
+	line-height: 26px;
+	display: block;
+	text-align: center;
+	text-decoration: none;
+	color: black;
+	}
+.leaflet-bar a,
+.leaflet-control-layers-toggle {
+	background-position: 50% 50%;
+	background-repeat: no-repeat;
+	display: block;
+	}
+.leaflet-bar a:hover {
+	background-color: #f4f4f4;
+	}
+.leaflet-bar a:first-child {
+	border-top-left-radius: 4px;
+	border-top-right-radius: 4px;
+	}
+.leaflet-bar a:last-child {
+	border-bottom-left-radius: 4px;
+	border-bottom-right-radius: 4px;
+	border-bottom: none;
+	}
+.leaflet-bar a.leaflet-disabled {
+	cursor: default;
+	background-color: #f4f4f4;
+	color: #bbb;
+	}
+
+.leaflet-touch .leaflet-bar a {
+	width: 30px;
+	height: 30px;
+	line-height: 30px;
+	}
+.leaflet-touch .leaflet-bar a:first-child {
+	border-top-left-radius: 2px;
+	border-top-right-radius: 2px;
+	}
+.leaflet-touch .leaflet-bar a:last-child {
+	border-bottom-left-radius: 2px;
+	border-bottom-right-radius: 2px;
+	}
+
+/* zoom control */
+
+.leaflet-control-zoom-in,
+.leaflet-control-zoom-out {
+	font: bold 18px 'Lucida Console', Monaco, monospace;
+	text-indent: 1px;
+	}
+
+.leaflet-touch .leaflet-control-zoom-in, .leaflet-touch .leaflet-control-zoom-out  {
+	font-size: 22px;
+	}
+
+
+/* layers control */
+
+.leaflet-control-layers {
+	box-shadow: 0 1px 5px rgba(0,0,0,0.4);
+	background: #fff;
+	border-radius: 5px;
+	}
+.leaflet-control-layers-toggle {
+	background-image: url(images/layers.png);
+	width: 36px;
+	height: 36px;
+	}
+.leaflet-retina .leaflet-control-layers-toggle {
+	background-image: url(images/layers-2x.png);
+	background-size: 26px 26px;
+	}
+.leaflet-touch .leaflet-control-layers-toggle {
+	width: 44px;
+	height: 44px;
+	}
+.leaflet-control-layers .leaflet-control-layers-list,
+.leaflet-control-layers-expanded .leaflet-control-layers-toggle {
+	display: none;
+	}
+.leaflet-control-layers-expanded .leaflet-control-layers-list {
+	display: block;
+	position: relative;
+	}
+.leaflet-control-layers-expanded {
+	padding: 6px 10px 6px 6px;
+	color: #333;
+	background: #fff;
+	}
+.leaflet-control-layers-scrollbar {
+	overflow-y: scroll;
+	overflow-x: hidden;
+	padding-right: 5px;
+	}
+.leaflet-control-layers-selector {
+	margin-top: 2px;
+	position: relative;
+	top: 1px;
+	}
+.leaflet-control-layers label {
+	display: block;
+	}
+.leaflet-control-layers-separator {
+	height: 0;
+	border-top: 1px solid #ddd;
+	margin: 5px -10px 5px -6px;
+	}
+
+/* Default icon URLs */
+.leaflet-default-icon-path {
+	background-image: url(images/marker-icon.png);
+	}
+
+
+/* attribution and scale controls */
+
+.leaflet-container .leaflet-control-attribution {
+	background: #fff;
+	background: rgba(255, 255, 255, 0.7);
+	margin: 0;
+	}
+.leaflet-control-attribution,
+.leaflet-control-scale-line {
+	padding: 0 5px;
+	color: #333;
+	}
+.leaflet-control-attribution a {
+	text-decoration: none;
+	}
+.leaflet-control-attribution a:hover {
+	text-decoration: underline;
+	}
+.leaflet-container .leaflet-control-attribution,
+.leaflet-container .leaflet-control-scale {
+	font-size: 11px;
+	}
+.leaflet-left .leaflet-control-scale {
+	margin-left: 5px;
+	}
+.leaflet-bottom .leaflet-control-scale {
+	margin-bottom: 5px;
+	}
+.leaflet-control-scale-line {
+	border: 2px solid #777;
+	border-top: none;
+	line-height: 1.1;
+	padding: 2px 5px 1px;
+	font-size: 11px;
+	white-space: nowrap;
+	overflow: hidden;
+	-moz-box-sizing: border-box;
+	     box-sizing: border-box;
+
+	background: #fff;
+	background: rgba(255, 255, 255, 0.5);
+	}
+.leaflet-control-scale-line:not(:first-child) {
+	border-top: 2px solid #777;
+	border-bottom: none;
+	margin-top: -2px;
+	}
+.leaflet-control-scale-line:not(:first-child):not(:last-child) {
+	border-bottom: 2px solid #777;
+	}
+
+.leaflet-touch .leaflet-control-attribution,
+.leaflet-touch .leaflet-control-layers,
+.leaflet-touch .leaflet-bar {
+	box-shadow: none;
+	}
+.leaflet-touch .leaflet-control-layers,
+.leaflet-touch .leaflet-bar {
+	border: 2px solid rgba(0,0,0,0.2);
+	background-clip: padding-box;
+	}
+
+
+/* popup */
+
+.leaflet-popup {
+	position: absolute;
+	text-align: center;
+	margin-bottom: 20px;
+	}
+.leaflet-popup-content-wrapper {
+	padding: 1px;
+	text-align: left;
+	border-radius: 12px;
+	}
+.leaflet-popup-content {
+	margin: 13px 19px;
+	line-height: 1.4;
+	}
+.leaflet-popup-content p {
+	margin: 18px 0;
+	}
+.leaflet-popup-tip-container {
+	width: 40px;
+	height: 20px;
+	position: absolute;
+	left: 50%;
+	margin-left: -20px;
+	overflow: hidden;
+	pointer-events: none;
+	}
+.leaflet-popup-tip {
+	width: 17px;
+	height: 17px;
+	padding: 1px;
+
+	margin: -10px auto 0;
+
+	-webkit-transform: rotate(45deg);
+	   -moz-transform: rotate(45deg);
+	    -ms-transform: rotate(45deg);
+	        transform: rotate(45deg);
+	}
+.leaflet-popup-content-wrapper,
+.leaflet-popup-tip {
+	background: white;
+	color: #333;
+	box-shadow: 0 3px 14px rgba(0,0,0,0.4);
+	}
+.leaflet-container a.leaflet-popup-close-button {
+	position: absolute;
+	top: 0;
+	right: 0;
+	padding: 4px 4px 0 0;
+	border: none;
+	text-align: center;
+	width: 18px;
+	height: 14px;
+	font: 16px/14px Tahoma, Verdana, sans-serif;
+	color: #c3c3c3;
+	text-decoration: none;
+	font-weight: bold;
+	background: transparent;
+	}
+.leaflet-container a.leaflet-popup-close-button:hover {
+	color: #999;
+	}
+.leaflet-popup-scrolled {
+	overflow: auto;
+	border-bottom: 1px solid #ddd;
+	border-top: 1px solid #ddd;
+	}
+
+.leaflet-oldie .leaflet-popup-content-wrapper {
+	zoom: 1;
+	}
+.leaflet-oldie .leaflet-popup-tip {
+	width: 24px;
+	margin: 0 auto;
+
+	-ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=0.70710678, M12=0.70710678, M21=-0.70710678, M22=0.70710678)";
+	filter: progid:DXImageTransform.Microsoft.Matrix(M11=0.70710678, M12=0.70710678, M21=-0.70710678, M22=0.70710678);
+	}
+.leaflet-oldie .leaflet-popup-tip-container {
+	margin-top: -1px;
+	}
+
+.leaflet-oldie .leaflet-control-zoom,
+.leaflet-oldie .leaflet-control-layers,
+.leaflet-oldie .leaflet-popup-content-wrapper,
+.leaflet-oldie .leaflet-popup-tip {
+	border: 1px solid #999;
+	}
+
+
+/* div icon */
+
+.leaflet-div-icon {
+	background: #fff;
+	border: 1px solid #666;
+	}
+
+
+/* Tooltip */
+/* Base styles for the element that has a tooltip */
+.leaflet-tooltip {
+	position: absolute;
+	padding: 6px;
+	background-color: #fff;
+	border: 1px solid #fff;
+	border-radius: 3px;
+	color: #222;
+	white-space: nowrap;
+	-webkit-user-select: none;
+	-moz-user-select: none;
+	-ms-user-select: none;
+	user-select: none;
+	pointer-events: none;
+	box-shadow: 0 1px 3px rgba(0,0,0,0.4);
+	}
+.leaflet-tooltip.leaflet-clickable {
+	cursor: pointer;
+	pointer-events: auto;
+	}
+.leaflet-tooltip-top:before,
+.leaflet-tooltip-bottom:before,
+.leaflet-tooltip-left:before,
+.leaflet-tooltip-right:before {
+	position: absolute;
+	pointer-events: none;
+	border: 6px solid transparent;
+	background: transparent;
+	content: "";
+	}
+
+/* Directions */
+
+.leaflet-tooltip-bottom {
+	margin-top: 6px;
+}
+.leaflet-tooltip-top {
+	margin-top: -6px;
+}
+.leaflet-tooltip-bottom:before,
+.leaflet-tooltip-top:before {
+	left: 50%;
+	margin-left: -6px;
+	}
+.leaflet-tooltip-top:before {
+	bottom: 0;
+	margin-bottom: -12px;
+	border-top-color: #fff;
+	}
+.leaflet-tooltip-bottom:before {
+	top: 0;
+	margin-top: -12px;
+	margin-left: -6px;
+	border-bottom-color: #fff;
+	}
+.leaflet-tooltip-left {
+	margin-left: -6px;
+}
+.leaflet-tooltip-right {
+	margin-left: 6px;
+}
+.leaflet-tooltip-left:before,
+.leaflet-tooltip-right:before {
+	top: 50%;
+	margin-top: -6px;
+	}
+.leaflet-tooltip-left:before {
+	right: 0;
+	margin-right: -12px;
+	border-left-color: #fff;
+	}
+.leaflet-tooltip-right:before {
+	left: 0;
+	margin-left: -12px;
+	border-right-color: #fff;
+	}

package.json

@@ -0,0 +1,24 @@
+{
+  "name": "tamview",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "csv-parse": "^4.8.3",
+    "express": "^4.17.1",
+    "leaflet": "^1.6.0",
+    "parcel-bundler": "^1.12.4",
+    "request": "^2.88.0",
+    "request-promise-native": "^1.0.8"
+  },
+  "devDependencies": {
+    "nodemon": "^2.0.2"
+  }
+}

server.js

@@ -0,0 +1,65 @@
+const express = require('express');
+const request = require('request');
+const csv = require('csv-parse');
+
+const data = require('./data');
+
+const app = express();
+const port = 3000;
+
+app.use(express.static('front'));
+
+const TAM_REALTIME = 'http://data.montpellier3m.fr/node/10732/download';
+
+app.get('/realtime', (req, res) =>
+{
+    const parser = csv({
+        delimiter: ';',
+    });
+
+    passages = {};
+    passagesLast = Date.now();
+
+    const stream = request(TAM_ENDPOINT)
+        .pipe(parser);
+
+    stream.on('readable', () =>
+    {
+        let row;
+
+        while (row = stream.read())
+        {
+            if (row.length === 0 || row[0] === 'course')
+            {
+                // Ignore les lignes invalides
+                continue;
+            }
+
+            if (passages[row[2]] === undefined)
+            {
+                passages[row[2]] = [];
+            }
+
+            passages[row[2]].push({
+                ligne: row[4],
+                destination: row[5],
+                direction: row[6],
+                time: row[7],
+                theorique: row[8],
+            });
+        }
+    });
+
+    stream.on('end', () => res());
+    stream.on('error', err => rej(err));
+
+    res.send('Hello World!');
+})
+
+app.get('/line/:lineRef', async (req, res) =>
+{
+    const lineData = await data.fetchLineData(req.params.lineRef);
+    res.json(lineData);
+});
+
+app.listen(port, () => console.log(`Example app listening on port ${port}!`))

util.js

@@ -0,0 +1,46 @@
+/**
+ * Wrap an async function to cache its result.
+ *
+ * On first call of the wrapped function, the result will be stored and further
+ * calls will directly return this cached value (always inside a promise).
+ *
+ * A `.noCache` method is provided to force getting a fresh value.
+ *
+ * Each cache value is scoped to the array of arguments that yielded it
+ * (comparison done using its JSON representation).
+ *
+ * @param fun Function to wrap.
+ * @return Wrapped function.
+ */
+const makeCached = fun =>
+{
+    const cachedResults = new Map();
+
+    const noCache = async (...args) =>
+    {
+        const result = await fun(...args);
+        cachedResults.set(JSON.stringify(args), result);
+        return result;
+    };
+
+    const withCache = async (...args) =>
+    {
+        const key = JSON.stringify(args);
+
+        if (cachedResults.has(key))
+        {
+            return cachedResults.get(key);
+        }
+        else
+        {
+            const result = await fun(...args);
+            cachedResults.set(key, result);
+            return result;
+        }
+    };
+
+    withCache.noCache = noCache;
+    return withCache;
+};
+
+exports.makeCached = makeCached;