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$(document).ready(function() {
var self = this;
self.popupTemplate = _.template('<table><tr><th>Key</th><th>Value</th></tr>\
<% _.each(properties, function(val, key) { %> \
<% if (/\:/.exec(key)) { %> \
<tr> \
<td><%= key.split(":")[1] %> </td> \
<td><%= val %> </td> \
</tr> \
<% } else {%> \
<tr>\
<td><%= key %> </td> \
<td><%= val %> </td> \
</tr>\
<% } %> \
<% }); %> \
</table>');
// to filter them later
self.hospitalAttributes = [];
self.currentFilter = [];
self.hospitals = null;
self.tileLayer = L.tileLayer('http://{s}.www.toolserver.org/tiles/osm-no-labels/{z}/{x}/{y}.png', {
maxZoom: 18,
attribution: 'Map data © <a href="http://openstreetmap.org">OpenStreetMap</a> contributors'
});
var map = L.map( 'map', {
zoom: 12,
layers: [self.tileLayer],
});
GlobalMap = map;
function createQueryData(bbox) {
// TODO: Use POST instead of GET, for neatness
return "data=[out:json];(" +
"(node[amenity=hospital]("+ bbox +");way[amenity=hospital]("+ bbox +");node(w););" +
"(node[amenity=doctors]("+ bbox +");way[amenity=doctors]("+ bbox +");node(w););" +
"(node[amenity=dentist]("+ bbox +");way[amenity=dentist]("+ bbox +");node(w););" +
");out;";
}
map.on('locationfound', onLocationFound);
map.on('locationerror', onLocationError);
map.on('moveend', function(e) {
var zoom = map.getZoom();
if (zoom < 10) {
return;
}
var bounds = map.getBounds();
var sw = bounds.getSouthWest();
var ne = bounds.getNorthEast();
bbox = [sw.lat, sw.lng, ne.lat, ne.lng].join(',');
var data = createQueryData(bbox);
converter = new op2geojson();
converter.fetch("http://overpass-api.de/api/interpreter", data, function(data) {
self.hospitals = data;
self.hospitalLayer = buildLayer(data);
var filteredLayers = _.map(self.hospitalAttributes, function (attr) {
return L.geoJson(self.hospitals, {
style: function(feature) {
return {color: 'red'};
},
onEachFeature: function(feature, layer) {
layer.bindPopup(self.popupTemplate({ properties: feature.properties }));
},
filter: function(feature, layer) {
return _.contains(_.keys(feature.properties), attr);
}
});
});
if (self.layers) {
self.layers.clearLayers();
}
self.layers = L.control.layers(null, {
"Hospitals" : self.hospitalLayer
}).addTo(map);
_.each(filteredLayers, function(layer, i) {
self.layers.addOverlay(layer, self.hospitalAttributes[i]);
});
// display layer
$('.leaflet-control-layers-selector').first().trigger('click')
});
})
map.locate({setView: true, maxZoom: 12});
var legend = L.control({position: 'bottomright'});
legend.onAdd = function (map) {
var div = L.DomUtil.create('div', 'info legend');
div.innerHTML += '<img href="resources/img/hospital.png"> Hospital<br>';
return div;
};
legend.addTo(map);
function buildLayer(data) {
return L.geoJson(data, {
style: function(feature) {
if (feature.properties['amenity'] === 'hospital') {
return {color: 'red'};
} else {
return {color: 'blue'};
}
},
onEachFeature: function(feature, layer) {
storeBooleanAttributeKeys(feature);
layer.bindPopup(self.popupTemplate({ properties: feature.properties }));
},
});
}
function storeBooleanAttributeKeys(feature) {
var isHierarchical = new RegExp('\:');
function isBoolean (val) {
return val === 'yes' || val === 'no';
}
var keys = _.keys(feature.properties);
_.each(feature.properties, function(val, key) {
if (isHierarchical.exec(key)) {
key = key.split(':')[1];
}
if (!_.contains(self.hospitalAttributes, key) && isBoolean(val)) {
self.hospitalAttributes.push(key);
}
});
self.hospitalAttributes;
}
function onLocationFound(e) {
self.currentLocation = e.latlng;
var radius = e.accuracy / 2;
L.marker(e.latlng).addTo(map)
.bindPopup("You are within " + radius + " meters from this point").openPopup();
}
function onLocationError(e) {
alert(e.message);
}
});
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