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transit-osm.js
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/* transit-osm.js 0.1.0
* (c) Pranav Ravichandran <[email protected]>
* transit-osm.js carries the MIT license.
* http://onloop.net/transit/
*/
var transit = (function () {
return {
// Get a selector div, a list of names of stops in the map, and the points of the stops,
// and return a map object with a status and a search bar.
initMap : function (selector, tileLayer, stopsList, routePoints, showLog, showSearch) {
// Remove the initialization message before overlaying the map on the div.
$(selector + "> #init").html('');
$(selector).append("<div id=\"timezone\"></div>");
$(selector + "> #timezone").css({
'position': 'absolute',
'bottom': '3%',
'right': '0.8%',
'z-index': '99',
'font-weight': 'bold',
});
$(selector).append("<div id=\"transitMap\"></div>");
$(selector + "> #transitMap").css({
'position': 'absolute',
'width': '100%',
'height': '100%',
});
if (showLog) {
$(selector).append("<div id=\"toggleLog\">Start Logging</div>");
$(selector + "> #toggleLog").css({
'position': 'absolute',
'bottom': '4%',
'left': '1%',
'z-index': '99',
'color': '#800000',
'-webkit-box-shadow': '0px 0px 8px rgba(0, 0, 0, 0.3)',
'-moz-box-shadow': '0px 0px 8px rgba(0, 0, 0, 0.3)',
'box-shadow': '0px 0px 8px rgba(0, 0, 0, 0.3)',
'background-color': 'hsl(0, 0%, 90%)',
'border-radius': '10px',
'padding': '10px',
'font-weight': 'bold',
'cursor': 'pointer',
});
// Open the log when the toggle button is clicked.
$(selector + "> #toggleLog").click(function () {
transit.initTicker(selector);
var tickerDiv = selector + "> #tickerDiv";
$(tickerDiv).css('display', 'inline');
$(tickerDiv).fadeOut(5000);
});
transit.initStatus(selector);
}
var map = L.map('transitMap');
tileLayer.addTo(map);
if (showSearch) transit.initSearch(selector, stopsList, routePoints, map);
return map;
},
// Initialize the ticker that shows a log of events.
initTicker : function (selector) {
$(selector).append('<div id="tickerDiv"><span style="color:#800000"><strong>Transit Log</span>' +
'<br /><br /></strong><div id="ticker"></div><br /><div id="tickerCtrl">' +
'<span id="clear"><strong>Reset</strong></span> | ' +
'<span id="stop"><strong>Stop logging</span></div></div>');
var tickerDiv = selector + "> #tickerDiv";
var ticker = tickerDiv + "> #ticker";
var tickerCtrl = tickerDiv + "> #tickerCtrl";
var clear = tickerCtrl + "> #clear";
var stop = tickerCtrl + "> #stop";
// Clear the toggle button when the log is active.
$(selector + "> #toggleLog").css('display', 'none');
$(tickerDiv).css({
'position': 'absolute',
'bottom': '1%',
'left': '1%',
'width': '40%',
'z-index': '99',
'background-color': 'hsl(0, 0%, 90%)',
'height': '38%',
'-webkit-box-shadow': '0px 0px 8px rgba(0, 0, 0, 0.3)',
'-moz-box-shadow': '0px 0px 8px rgba(0, 0, 0, 0.3)',
'box-shadow': '0px 0px 8px rgba(0, 0, 0, 0.3)',
'border-radius': '10px',
'padding': '10px',
'text-align': 'center',
'overflow-y': 'auto',
'overflow-x': 'auto',
'display': 'none'
});
$(ticker).css({
'height': '75%',
'overflow-y': 'auto',
'overflow-x': 'auto',
'text-align': 'left',
'line-height': '150%'
});
$(tickerCtrl).css({
'cursor': 'pointer',
'color': '#800000'
});
// Clear/reset the log.
$(clear).click(function () {
$(ticker).html('');
});
// Remove the log and show the toggle button.
$(stop).click(function () {
$(tickerDiv).remove();
$(selector + "> #toggleLog").css('display', 'inline');
});
// Show log on mouseover, and fade it out on mouseout.
$(tickerDiv).hover(function () {
$(tickerDiv).stop(true, true);
$(tickerDiv).css('display', 'inline');
}, function () {
$(tickerDiv).fadeOut(5000);
});
},
// Initialize a status div to show error messages and vehicle details
// on the bottom right corner.
initStatus : function (selector) {
$(selector).append('<div id="status"></div>');
$(selector + '> #status').css({
'position': 'absolute',
'bottom': '3%',
'right': '0.8%',
'z-index': '99',
'background-color': 'hsl(0, 0%, 90%)',
'-webkit-box-shadow': '0px 0px 8px rgba(0, 0, 0, 0.3)',
'-moz-box-shadow': '0px 0px 8px rgba(0, 0, 0, 0.3)',
'box-shadow': '0px 0px 8px rgba(0, 0, 0, 0.3)',
'border-radius': '5px',
'padding': '10px',
'display': 'none'
});
},
// Initialize a search box that takes a list of names of stops, and their coordinates.
// Autocompletes on key down from the list of stops. Zooms into the respective coordinates
// of a stop, when selected.
initSearch : function (selector, stopsList, routePoints, map) {
$('head').append('<link rel="stylesheet" ' +
'href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />');
$.getScript("http://ajax.googleapis.com/ajax/libs/jqueryui/1.10.3/jquery-ui.min.js", function () {
$(selector).append("<input type=\"text\" id=\"search\" " +
"placeholder=\"Search for a stop and select it from the dropdown.\">");
var searchDiv = selector + "> #search";
$(searchDiv).css({
'position': 'absolute',
'width': '50%',
'height': '13px',
'top': '1%',
'left': '25%',
'z-index': '99',
'border-radius': '5px',
'padding': '5px',
});
$(searchDiv).autocomplete({
source: stopsList,
select: function (event, ui) {
var coordsOfItem = routePoints[ui.item.value];
var zeroIn = new L.LatLng(coordsOfItem.x, coordsOfItem.y);
map.setView(zeroIn, 15);
}
});
// Style the dropdown using a predefined jquery-ui class.
$('.ui-autocomplete').css({
'max-height': '50%',
'overflow-y': 'auto',
'overflow-x': 'hidden',
'padding-right': '20px'
});
});
},
// Initialize a marker at a point specified by the coords parameter in the map.
initMarker : function (coords, selector, map, color) {
var markerPos = new L.LatLng(coords.x, coords.y);
marker = new L.CircleMarker(markerPos, {
radius: 7,
color: 'black',
opacity: 1,
weight: 7,
fill: true,
fillColor: color,
fillOpacity: 0.7
});
return marker;
},
// Event handlers for marker mouseover, like infowindow popups and status messages.
onMarkerMouseover : function (selector, map, marker, mouseoverText, showLog) {
if (showLog) {
// Clear all listeners so they don't accumulate.
marker.removeEventListener('mouseover');
marker.removeEventListener('mouseout');
L.DomEvent.addListener(marker, 'mouseover', function () {
$(selector + '> #status').stop(true, true);
$(selector + '> #status').css('display', 'inline');
$(selector + '> #status').html(mouseoverText);
});
L.DomEvent.addListener(marker, 'mouseout', function () {
$(selector + '> #status').css('display', 'none');
});
}
if (typeof marker.popup != "undefined") {
// Update content of existing infowindow.
marker.popup.setContent(mouseoverText);
} else {
marker.unbindPopup();
marker.popup = new L.Popup().setContent(mouseoverText);
// Open an infowindow on clicking a marker.
marker.bindPopup(marker.popup);
// Close all info windows on clicking anywhere on the map.
L.DomEvent.addListener(map, 'click', function () {
map.closePopup();
});
}
},
// Take a KML file in a public domain and overlay it on the map.
overlayKml : function (kmlUrl, map) {
var kmlLayer = new L.KML(kmlUrl, {async: true});
kmlLayer.on("loaded", function (e) { map.fitBounds(e.target.getBounds()); });
map.addLayer(kmlLayer);
map.addControl(new L.Control.Layers({}, {'Show Routes': kmlLayer}));
},
// AJAX promise for doing stuff with the kml data later.
kmlPromise : function (kmlUrl) {
return $.ajax({
url: kmlUrl,
dataType: 'xml',
async: true
});
},
// AJAX promise bla json bla.
jsonPromise : function (jsonUrl) {
return $.ajax({
url: jsonUrl,
dataType: 'json',
async: true
});
},
// Take KML data and parse it to get a list of stop names, an object of line name-coordinates,
// and an object of stopname - points.
routeParser : function (data) {
var lines = {};
var points = {};
var stopNames = new Array();
var xmlNode = $('Document', data);
xmlNode.find('Placemark > LineString > coordinates').each(function () {
var simPts = transit.trim($(this).text()).split(' ');
var grpPts = new Array();
var routeName = $(this).closest('Placemark').find('name').text().toLowerCase();
for (eachPt in simPts) {
var xy = transit.strip(simPts[eachPt]).split(',');
grpPts.push({ x: parseFloat(xy[1], 10), y: parseFloat(xy[0], 10) });
}
lines[transit.trim(routeName)] = grpPts;
});
xmlNode.find('Point').each(function () {
var parentTag = $(this).closest('Placemark');
var xy = transit.strip(parentTag.find('Point').text()).split(',');
var stopName = transit.trim(parentTag.find('name').text()).toLowerCase();
stopNames.push(stopName);
points[stopName] = {
x: parseFloat(xy[1], 10),
y: parseFloat(xy[0], 10)
};
});
return {
"lines": lines,
"points": points,
"stopnames": stopNames
};
},
// Take JSON schedule data and return a list of vehicle objects,
// the timezone of the map and the default stop interval for the vehicles
// if specified.
vehicleParser : function (data) {
var vehicleObj = {};
vehicleObj.timezone = data.timezone;
vehicleObj.vehicles = data.vehicles;
vehicleObj.stopinterval = data.defaultstopinterval;
return vehicleObj;
},
// Takes a vehicleParser output object, a routeParser output object,
// and builds another object to be used by the estimator (estimateCurrentPosition).
// Contains keys such as time-adjusted traveltimes, arrival times, departure times et al.
scheduler : function (vehicleObj, routes, stopinterval) {
var vehicleArrivals = {};
var vehicleDepartures = {};
var vehicleTravelTimes = new Array();
var vehicleTravelTimesAsStrings = new Array();
var stopsObj = vehicleObj.stops;
var noOfStops = vehicleObj.stops.length;
var firstStop = stopsObj[0];
var firstStopName = firstStop.name;
// Throw error if the first stop's departure isn't mentioned.
if (typeof firstStop.departure == 'undefined')
throw new Error(vehicleObj.name + " is missing its initial departure time at " + firstStopName);
var startTime = transit.parseTime(firstStop.departure.time, firstStop.departure.day);
var vehicleStopCoords = {};
var points = routes.points;
var opLine = routes.lines[vehicleObj.route.toLowerCase()];
// Error if vehicle's travelling on a non-existent route.
if (typeof opLine == "undefined")
throw new Error(vehicleObj.name + "'s route " + vehicleObj.route + " doesn't exist.");
vehicleTravelTimesAsStrings.push(firstStop.departure.time);
vehicleDepartures[startTime - startTime] = firstStopName;
vehicleTravelTimes.push(startTime - startTime);
try {
// If the user's not placed a marker exactly on the line, resolve the marker to a point on the line.
vehicleStopCoords[firstStopName] = transit.resolvePointToLine(opLine,
points[firstStopName.toLowerCase()]);
} catch (err) {
// Invalid stop name error.
throw new Error("The stop " + firstStopName + " in vehicle " +
vehicleObj.name + "'s schedule wasn't found in its route.");
}
for (var eachStop = 1; eachStop < noOfStops - 1; eachStop++) {
var temp = stopsObj[eachStop];
var prevStop = stopsObj[eachStop - 1];
var tempName = temp.name;
// If arrival time isn't specified, calculate it from the defaultstopinterval
// and the departure time specified.
if (typeof temp.arrival == 'undefined') {
var currDepartureTime = transit.parseTime(temp.departure.time, temp.departure.day) -
startTime;
var currArrivalTime = currDepartureTime - transit.parseTime(stopinterval, 1);
temp.arrival = {};
temp.arrival.time = transit.secondsToHours(currArrivalTime + startTime).replace('+', '');
temp.arrival.day = Math.ceil((currArrivalTime + startTime) / 86400);
} else {
var currArrivalTime = transit.parseTime(temp.arrival.time, temp.arrival.day) -
startTime;
}
// Do the same as above with departure times.
if (typeof temp.departure == 'undefined') {
var currArrivalTime = transit.parseTime(temp.arrival.time, temp.arrival.day) - startTime;
var currDepartureTime = currArrivalTime + transit.parseTime(stopinterval, 1);
temp.departure = {};
temp.departure.time = transit.secondsToHours(currDepartureTime + startTime).replace('+', '');
temp.departure.day = Math.ceil((currDepartureTime + startTime) / 86400);
} else {
var currDepartureTime = transit.parseTime(temp.departure.time, temp.departure.day) -
startTime;
}
vehicleTravelTimesAsStrings.push(temp.arrival.time, temp.departure.time);
vehicleArrivals[currArrivalTime] = tempName;
vehicleDepartures[currDepartureTime] = tempName;
vehicleTravelTimes.push(currArrivalTime, currDepartureTime);
try {
vehicleStopCoords[tempName] = transit.resolvePointToLine(opLine,
points[tempName.toLowerCase()]);
} catch (err) {
throw new Error("The stop " + tempName + " in vehicle " +
vehicleObj.name + "'s schedule wasn't found in its route.");
}
}
var lastStop = stopsObj[noOfStops - 1];
var lastStopName = lastStop.name;
// Error if reaching time isn't specified.
if (typeof lastStop.arrival == 'undefined')
throw new Error(vehicleObj.name + " is missing its final arrival time at " + lastStopName);
var endTime = transit.parseTime(lastStop.arrival.time, lastStop.arrival.day) - startTime;
vehicleArrivals[endTime] = lastStopName;
vehicleTravelTimesAsStrings.push(lastStop.arrival.time);
vehicleTravelTimes.push(endTime);
// If the vehicle has a schedule that's going in reverse, throw an error.
if (!transit.isSorted(vehicleTravelTimes))
throw new Error(vehicleObj.name + " seems to be going backwards in time.");
try {
vehicleStopCoords[lastStopName] = transit.resolvePointToLine(opLine,
points[lastStopName.toLowerCase()]);
} catch (err) {
throw new Error("The stop " + lastStopName + " in vehicle " +
vehicleObj.name + "'s schedule wasn't found in its route.");
}
// Thanks to https://gist.github.com/bobspace/2712980 for the color list.
var colors = ["AliceBlue","AntiqueWhite","Aqua","Aquamarine","Azure","Beige","Bisque","Black",
"BlanchedAlmond","Blue","BlueViolet","Brown","BurlyWood","CadetBlue","Chartreuse",
"Chocolate","Coral","CornflowerBlue","Cornsilk","Crimson","Cyan","DarkBlue","DarkCyan",
"DarkGoldenRod","DarkGray","DarkGrey","DarkGreen","DarkKhaki","DarkMagenta",
"DarkOliveGreen","Darkorange","DarkOrchid","DarkRed","DarkSalmon","DarkSeaGreen",
"DarkSlateBlue","DarkSlateGray","DarkSlateGrey","DarkTurquoise","DarkViolet","DeepPink",
"DeepSkyBlue","DimGray","DimGrey","DodgerBlue","FireBrick","FloralWhite","ForestGreen",
"Fuchsia","Gainsboro","GhostWhite","Gold","GoldenRod","Gray","Grey","Green","GreenYellow",
"HoneyDew","HotPink","IndianRed","Indigo","Ivory","Khaki","Lavender","LavenderBlush",
"LawnGreen","LemonChiffon","LightBlue","LightCoral","LightCyan","LightGoldenRodYellow",
"LightGray","LightGrey","LightGreen","LightPink","LightSalmon","LightSeaGreen",
"LightSkyBlue","LightSlateGray","LightSlateGrey","LightSteelBlue","LightYellow","Lime",
"LimeGreen","Linen","Magenta","Maroon","MediumAquaMarine","MediumBlue","MediumOrchid",
"MediumPurple","MediumSeaGreen","MediumSlateBlue","MediumSpringGreen","MediumTurquoise",
"MediumVioletRed","MidnightBlue","MintCream","MistyRose","Moccasin","NavajoWhite","Navy",
"OldLace","Olive","OliveDrab","Orange","OrangeRed","Orchid","PaleGoldenRod","PaleGreen",
"PaleTurquoise","PaleVioletRed","PapayaWhip","PeachPuff","Peru","Pink","Plum","PowderBlue",
"Purple","Red","RosyBrown","RoyalBlue","SaddleBrown","Salmon","SandyBrown","SeaGreen",
"SeaShell","Sienna","Silver","SkyBlue","SlateBlue","SlateGray","SlateGrey","Snow",
"SpringGreen","SteelBlue","Tan","Teal","Thistle","Tomato","Turquoise","Violet","Wheat",
"White","WhiteSmoke","Yellow","YellowGreen"];
// Assign a distinct color for each vehicle. This helps track the vehicle and
// since transit returns multiple markers for vehicles travelling over multiple days,
// it helps track other markers associated with the same vehicle.
vehicleObj.color = colors[Math.floor(Math.random() * colors.length)];
return {
"name": vehicleObj.name,
"info": vehicleObj.info,
"color": vehicleObj.color,
"starts": startTime,
// Create basic information about the vehicle.
"baseinfo": transit.createBaseInfo(vehicleObj.name, vehicleObj.info,
firstStopName, firstStop.departure.time,
lastStopName, lastStop.arrival.time),
"route": opLine,
"stops": vehicleStopCoords,
"days": lastStop.arrival.day - firstStop.departure.day,
"arrivals": vehicleArrivals,
"departures": vehicleDepartures,
"traveltimes": vehicleTravelTimes,
"traveltimesasstrings": vehicleTravelTimesAsStrings
};
},
// Remove newlines and whitespaces.
strip : function (string) {
return string.replace(/\s+/g, '').replace(/\n/g, '');
},
// Remove leading and trailing whitespaces.
trim : function (string) {
return string.replace(/^\s+|\s+$/g, '');
},
// Return true if a list is sorted. False if not.
// Acts as a helper to check if a vehicle's schedule is chronologically ordered.
isSorted : function (list) {
for (var i = 0; i < list.length - 1; i++) {
if (list[i] > list[i+1]) return false;
}
return true;
},
// Take a line [(x1,y1),(x2,y2)..(xn,yn)] and a point (x,y).
// Return the point on the line that's closest to (x,y).
resolvePointToLine : function (line, point) {
if (point.x == line[0].x && point.y == line[0].y)
return point;
var closestDist = transit.linearDist(line[0], point).toFixed(20);
var currPt = line[0];
for (var count = 1; count < line.length; count++) {
if (point.x == line[count].x && point.y == line[count].y)
return point;
var currDist = transit.linearDist(line[count], point).toFixed(20);
if (closestDist > currDist) {
currPt = line[count];
closestDist = currDist;
}
}
return currPt;
},
// Reimplemented from http://www.movable-type.co.uk/scripts/latlong.html
// Calculate great circle distance between two coordinates.
haversine : function (sourceCoords, targetCoords) {
var R = 6371; // km
/** Converts numeric degrees to radians */
if (typeof(Number.prototype.toRad) === "undefined") {
Number.prototype.toRad = function() {
return this * Math.PI / 180;
}
}
var dLat = (targetCoords.x - sourceCoords.x).toRad();
var dLon = (targetCoords.y - sourceCoords.y).toRad();
var lat1 = sourceCoords.x.toRad();
var lat2 = targetCoords.x.toRad();
var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
Math.sin(dLon/2) * Math.sin(dLon/2) * Math.cos(lat1) * Math.cos(lat2);
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
var d = R * c;
return d;
},
// Calculate linear distance on a plane between two points (x1,y1) and (x2,y2).
linearDist : function (sourceCoords, targetCoords) {
return Math.sqrt(Math.pow((targetCoords.x - sourceCoords.x), 2) +
Math.pow((targetCoords.y - sourceCoords.y), 2));
},
// Take two coordinates (x1,y1), (x2,y2) and a percentage. Return the coordinates that
// are on the line between (x1,y1) and (x2,y2) at percentage%.
percentDist : function (sourceCoords, targetCoords, percentage) {
var newCoords = {};
var ratio = percentage / 100;
newCoords.x = (1 - ratio) * sourceCoords.x + ratio * targetCoords.x;
newCoords.y = (1 - ratio) * sourceCoords.y + ratio * targetCoords.y;
return newCoords;
},
// Opposite of percentDist(). Take two values and return the percentage of target
// value in the range.
percentInRange : function (lower, upper, target) {
return ((target - lower) / (upper - lower)) * 100;
},
// Take a list of coordinates in the route, and slice the list between start and end.
// If the start is after the end, make sure the slicing goes well by swapping.
pointsBetweenStops : function (route, start, end) {
var startingAt = transit.indexOfCoordsObjInList(route, start);
var endingAt = transit.indexOfCoordsObjInList(route, end);
if (startingAt > endingAt)
return route.slice(endingAt, startingAt + 1).reverse();
else
return route.slice(startingAt, endingAt + 1);
},
// Since indexOf() doesn't work for objects, make a substitute function to return
// the index of a coordinates (x,y) object in a list.
indexOfCoordsObjInList : function (list, coords) {
for (var i = 0; i < list.length; i++) {
if (coords.x == list[i].x && coords.y == list[i].y)
return i;
}
return -1;
},
// Take a list of coordinates, and return the percentage distances of each
// point in the list from start to end.
hashOfPercentDists : function (points) {
var start = points[0];
var routeLength = points.length;
var end = points[routeLength - 1];
var distanceHash = {
0 : points[0]
};
var distances = [0];
var totalDist = 0;
var percentages = new Array();
for (var x = 0; x < routeLength - 1; x++) {
totalDist += transit.linearDist(points[x], points[x + 1]);
distances.push(totalDist);
}
for (var x = 0; x < distances.length; x++) {
var percentage = transit.percentInRange(0, totalDist, distances[x]);
percentages.push(percentage);
distanceHash[percentage] = points[x];
}
return {
"percentages": percentages,
"hash": distanceHash
};
},
// Variant of binary search that returns enclosing elements of searchElement in array.
enclosure : function (searchElement) {
var minIndex = 0;
var maxIndex = this.length - 1;
var currentIndex;
var currentElement;
while (minIndex <= maxIndex) {
currentIndex = (minIndex + maxIndex) / 2 | 0;
currentElement = this[currentIndex];
if (currentElement < searchElement) {
minIndex = currentIndex + 1;
}
else if (currentElement > searchElement) {
maxIndex = currentIndex - 1;
}
else {
return currentIndex;
}
}
if (searchElement > this[currentIndex]) {
if (typeof this[currentIndex + 1] != 'undefined')
return [currentIndex, currentIndex + 1];
else
return -1;
} else {
if (typeof this[currentIndex - 1] != 'undefined')
return [currentIndex - 1, currentIndex];
else
return -1;
}
},
// Take a timezone string and return the difference in seconds
// between the client's timezone and the given timezone.
parseTimeZone : function (timezone) {
var timeOffset = new Date().getTimezoneOffset();
var tzS = timezone.split(':');
tzS = tzS.map(function (x) { return parseInt(x, 10); });
if (tzS.length < 3)
tzS[2] = 0;
if (tzS[0] < 0) {
tzS[1] *= -1;
tzS[2] *= -1;
}
return tzS[0] * 3600 + tzS[1] * 60 + tzS[2] + timeOffset * 60;
},
// Take a timezone string and return the day in the timezone by calculating
// the offset between client timezone and target timezone. Returns 0 - 6
// based on the index of the day in the week. 0 being Sunday and 6 being Saturday.
dayInTimezone : function (timezone) {
var difference = Math.ceil((transit.parseTime(transit.currTime(), 1) +
transit.parseTimeZone(timezone)) / 86400) - 1;
var currDay = new Date().getDay();
var offset = currDay + difference;
var dayIndex = (offset < 0) ? 6 + (offset % 7) : offset % 7;
return dayIndex;
},
// Take a time string and a day and return the number of seconds from 00:00:00,
// adding the respective number of days in seconds.
parseTime : function (timeString, day) {
var hmsRe = /^(?:2[0-3]|[01]?[0-9]):[0-5]?[0-9](:[0-5]?[0-9])?$/;
if (!hmsRe.test(timeString))
throw new Error(timeString + " is not a valid timestring.");
var hms = timeString.split(':');
hms = hms.map(function (x) { return parseInt(x, 10); });
if (hms.length < 3)
hms[2] = 0;
return hms[0] * 3600 + hms[1] * 60 + hms[2] + (day - 1) * 86400;
},
// Return current time as a HH:MM:SS string.
currTime : function () {
var t = new Date();
return t.getHours().toString() + ":" +
t.getMinutes().toString() + ":" +
t.getSeconds().toString();
},
// Convert seconds to a HH:MM:SS string.
secondsToHours : function (timeInSeconds) {
var absTime = Math.abs(timeInSeconds);
var hours = parseInt(absTime / 3600 ) % 24;
var minutes = parseInt(absTime / 60 ) % 60;
var seconds = absTime % 60;
var result = (hours < 10 ? "0" + hours : hours) + ":" +
(minutes < 10 ? "0" + minutes : minutes) + ":" +
(seconds < 10 ? "0" + seconds : seconds);
if (timeInSeconds >= 0)
return "+" + result;
else
return "-" + result;
},
// Main estimator function. Takes an object returned by the scheduler.
// From the client's current time, and the travel times of the target vehicle,
// estimates the current position of the vehicle and returns the coordinates
// of the marker that should be placed on the map.
estimateCurrentPosition : function (vehicleObj, timezone) {
var arrivals = vehicleObj.arrivals;
var departures = vehicleObj.departures;
var travelTimes = vehicleObj.traveltimes;
var travelTimesAsStrings = vehicleObj.traveltimesasstrings;
var noOfDays = vehicleObj.days;
var starts = vehicleObj.starts;
var route = vehicleObj.route;
var stops = vehicleObj.stops;
var positions = new Array();
var timeOffset = new Date().getTimezoneOffset() * 60;
var time = transit.currTime();
for (var i = 1; i <= noOfDays + 1; i++) {
// Take the current time, adjust it to account for the timezone, and find out
// where in the vehicle's journey it lies.
var range = transit.enclosure.call(travelTimes, transit.parseTime(time, i) +
(transit.parseTimeZone(timezone) % 86400) - starts);
var currPos = {
"stationaryAt": "",
"departureTime": 0,
"leaving": "",
"approaching": "",
"leftTime": 0,
"approachTime": 0,
"started": false,
"completed": false,
"justReached": false,
"justLeft": false,
"currentCoords": null
};
// If the vehicle is moving between two stops.
if (range[0] % 2 == 0 && range.length == 2) {
var leftTime = travelTimes[range[0]];
var approachTime = travelTimes[range[1]];
currPos.leftTime = travelTimesAsStrings[range[0]];
currPos.approachTime = travelTimesAsStrings[range[1]];
var leavingStop = departures[leftTime];
var approachingStop = arrivals[approachTime];
currPos.leaving = leavingStop;
currPos.approaching = approachingStop;
var leavingStopCoords = stops[leavingStop];
var approachingStopCoords = stops[approachingStop];
var timePercent = transit.percentInRange(travelTimes[range[0]], travelTimes[range[1]],
transit.parseTime(time, i) +
(transit.parseTimeZone(timezone) % 86400) - starts);
var pointsFromLtoA = transit.pointsBetweenStops(route, leavingStopCoords,
approachingStopCoords);
var ps = transit.hashOfPercentDists(pointsFromLtoA);
var distHash = ps.hash;
var distList = ps.percentages;
var timeRange = transit.enclosure.call(distList, timePercent);
var bef = distList[timeRange[0]];
var af = distList[timeRange[1]];
var percent = transit.percentInRange(bef, af, timePercent);
currPos.currentCoords = transit.percentDist(distHash[bef], distHash[af], percent);
} else {
// If the vehicle is stationary at a stop.
if (range[0] % 2 != 0 && range.length == 2) {
currPos.stationaryAt = departures[travelTimes[range[1]]];
currPos.departureTime = travelTimesAsStrings[range[1]];
currPos.currentCoords = stops[currPos.stationaryAt];
} else if (range > 0 && range < travelTimes.length - 1) {
if (range % 2 != 0) { // Vehicle just reached a stop.
currPos.justReached = true;
currPos.stationaryAt = departures[travelTimes[range + 1]];
currPos.departureTime = travelTimesAsStrings[range + 1];
currPos.currentCoords = stops[currPos.stationaryAt];
} else { // Vehicle just left a stop.
currPos.justLeft = true;
currPos.stationaryAt = departures[travelTimes[range]];
currPos.approachingStop = arrivals[travelTimes[range + 1]];
currPos.departureTime = travelTimesAsStrings[range];
currPos.approachTime = travelTimesAsStrings[range + 1];
currPos.currentCoords = stops[currPos.stationaryAt];
}
} else if (range == travelTimes.length - 1) { // Vehicle's done with its journey.
currPos.completed = true;
currPos.stationaryAt = arrivals[travelTimes[range]];
currPos.currentCoords = stops[currPos.stationaryAt];
} else if (range == 0) { // Vehicle just started on its journey.
currPos.started = true;
currPos.stationaryAt = departures[travelTimes[range]];
currPos.approachingStop = arrivals[travelTimes[range + 1]];
currPos.approachTime = travelTimesAsStrings[range + 1];
currPos.currentCoords = stops[currPos.stationaryAt];
}
}
positions.push(currPos);
}
return positions;
},
// Create a basic info string about a vehicle.
createBaseInfo : function (name, info, startpoint, starttime, endpoint, endtime) {
return "<strong>Vehicle: </strong>" + name + "<br />" +
((typeof info != "undefined") ? "<strong>Info: </strong>" + info + "<br />" : "") +
"<strong>Start: </strong>" + startpoint + " (" + starttime +
")<br />" + "<strong>End: </strong>" + endpoint + " (" +
endtime + ")<br />";
},
// Build on a vehicle's basic info and create position info based on the current position.
createPositionInfo : function (base, position) {
if (position.stationaryAt) {
return base + "<strong>At: </strong>" + position.stationaryAt +
"<br />" + "<strong>Departure: </strong>" + position.departureTime;
} else {
return base +
"<strong>Left: </strong>" + position.leaving + " (" + position.leftTime +
")" + "<br />" + "<strong>Approaching: </strong>" + position.approaching +
" (" + position.approachTime + ")";
}
},
// Write events to the ticker log.
writeLog : function (selector, currPosition, vehicle) {
var tickerDiv = selector + "> #tickerDiv";
var ticker = tickerDiv + "> #ticker";
if (!($(tickerDiv).length > 0) || !(currPosition.justReached ||
currPosition.justLeft || currPosition.started || currPosition.completed)) return;
$(tickerDiv).show();
$(tickerDiv).stop(true, true);
if (currPosition.justReached) {
$(ticker).append("<em>" + transit.currTime() + "</em> | " +
"<strong>" + vehicle.name + "</strong> just reached <strong>" +
currPosition.stationaryAt + "</strong>. " +
"Departs at: <strong>" + currPosition.departureTime + "</strong>.<br />");
} else if (currPosition.justLeft || currPosition.started) {
var sOrL = currPosition.started ? 'just started from' : 'just left';
$(ticker).append("<em>" + transit.currTime() + "</em> | " +
"<strong>" + vehicle.name + "</strong> " + sOrL + " <strong>" +
currPosition.stationaryAt + "</strong>. " +
"Next Stop: <strong>" + currPosition.approachingStop +
"</strong> at <strong>" + currPosition.approachTime + "</strong>.<br />");
} else if (currPosition.completed) {
$(ticker).append("<em>" + transit.currTime() + "</em> | " +
"<strong>" + vehicle.name +
"</strong> just reached its destination at <strong>" +
currPosition.stationaryAt + "</strong>.<br />");
}
$(tickerDiv).css('display','inline');
$(ticker).scrollTop($(ticker)[0].scrollHeight);
$(tickerDiv).fadeOut(5000);
},
// Recognize if client is using a handheld device. Some nasty useragent sniffing down here.
// Taken from http://detectmobilebrowsers.com/
isMobileDevice : function () {
var userAgent = navigator.userAgent || navigator.vendor || window.opera;
if(/(android|ipad|playbook|silk|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(userAgent)||/1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(userAgent.substr(0,4)))
return true;
else
return false;
},
// Sets the vehicles in motion. Continuously estimates positions of vehicles and moves markers to
// the acquired coordinate positions. refreshInterval determines the time of waiting between two
// cycles of movements.
setInMotion : function (selector, refreshInterval, vehicles, noOfVehicles, stopinterval, timezone, map, showLog) {
var transition = setInterval(
function() {
for (var count = 0; count < noOfVehicles; count++) {
var vehicle = vehicles[count];
if (typeof vehicle.markers == "undefined") {
vehicle.markers = new Array();
}
var currPositions = transit.estimateCurrentPosition(vehicle, timezone);
for (var i = 0; i < currPositions.length; i++) {
var currPosition = currPositions[i];
if (!currPosition.currentCoords) {
if (typeof vehicle.markers[i] != "undefined") {
map.removeLayer(vehicle.markers[i]);
delete vehicle.markers[i];
}
continue;
}
if (showLog) transit.writeLog(selector, currPosition, vehicle);
if (currPosition.completed) {
map.removeLayer(vehicle.markers[i]);
delete vehicle.markers[i];
}
var mouseOverInfo = transit.createPositionInfo(vehicle.baseinfo, currPosition);
if (typeof vehicle.markers[i] == "undefined") {
var currMarker = transit.initMarker(currPosition.currentCoords, selector,
map, vehicle.color);
currMarker.addTo(map);
vehicle.markers[i] = currMarker;
} else {
var currMarkerPos = new L.LatLng(currPosition.currentCoords.x,
currPosition.currentCoords.y);
vehicle.markers[i].setLatLng(currMarkerPos);
}
transit.onMarkerMouseover(selector, map, vehicle.markers[i], mouseOverInfo, showLog);
}
}
}, refreshInterval);
},
// String all the function calls together. Kinda like C's main().
callMain : function (selector, tileLayer, refreshInterval, routeObj, vehicleObj, kmlFile, showLog, showSearch, vehicles) {
var timezone = vehicleObj.timezone;
var stopinterval = vehicleObj.stopinterval;
var map = transit.initMap(selector, tileLayer, routeObj.stopnames, routeObj.points, showLog, showSearch);
map.invalidateSize();
transit.overlayKml(kmlFile, map);
$('#timezone').append("UTC" + timezone + "/Local" +
transit.secondsToHours(transit.parseTimeZone(timezone) % 86400));
if (typeof vehicles == "undefined") {
var vehicles = vehicleObj.vehicles;
var noOfVehicles = vehicles.length;
for (var count = 0; count < noOfVehicles; count++) {
try {
vehicles[count] = transit.scheduler(vehicles[count], routeObj, stopinterval);
} catch (err) {
$(selector + '> #init').html(err);
throw new Error(err);
}
}
} else {
var noOfVehicles = vehicles.length;
}
transit.setInMotion(selector, refreshInterval, vehicles, noOfVehicles,
stopinterval, timezone, map, showLog);
},
// Initialize stuff. Run the promises, acquire the kml and json data, add the main DOM listener,
// call the main function and write statuses if anything goes awry.
initialize : function (selector, tileLayer, kmlFile, jsonFile, showLog, showSearch, refreshInterval) {
// Default the refreshInterval to 1 second if it's less than 1 or unspecified.
refreshInterval = (typeof refreshInterval == "undefined" ||
refreshInterval < 1) ? 1000 : refreshInterval * 1000;
showLog = (typeof showLog == "undefined") ? true : showLog;
showSearch = (typeof showSearch == "undefined") ? true : showSearch;
$(selector).css({
'position': 'relative',
'font-family': '"Lucida Grande", "Lucida Sans Unicode",' +
'Verdana, Arial, Helvetica, sans-serif',
'font-size': '12px',
'text-shadow': 'hsla(0,0%,40%,0.5) 0 -1px 0, hsla(0,0%,100%,.6) 0 2px 1px',
'background-color': 'hsl(0, 0%, 90%)'