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Store locator data source
/**
* @extends storeLocator.StaticDataFeed
* @constructor
*/
function MedicareDataSource() {
$.extend(this, new storeLocator.StaticDataFeed);
var that = this;
$.get('medicare.csv', function(data) {
that.setStores(that.parse_(data));
});
}
/**
* @const
* @type {!storeLocator.FeatureSet}
* @private
*/
MedicareDataSource.prototype.FEATURES_ = new storeLocator.FeatureSet(
new storeLocator.Feature('Wheelchair-YES', 'Wheelchair access'),
new storeLocator.Feature('Audio-YES', 'Audio')
);
/**
* @return {!storeLocator.FeatureSet}
*/
MedicareDataSource.prototype.getFeatures = function() {
return this.FEATURES_;
};
/**
* @private
* @param {string} csv
* @return {!Array.<!storeLocator.Store>}
*/
MedicareDataSource.prototype.parse_ = function(csv) {
var stores = [];
var rows = csv.split('\n');
var headings = this.parseRow_(rows[0]);
for (var i = 1, row; row = rows[i]; i++) {
row = this.toObject_(headings, this.parseRow_(row));
var features = new storeLocator.FeatureSet;
features.add(this.FEATURES_.getById('Wheelchair-' + row.Wheelchair));
features.add(this.FEATURES_.getById('Audio-' + row.Audio));
var position = new google.maps.LatLng(row.Ycoord, row.Xcoord);
var shop = this.join_([row.Shp_num_an, row.Shp_centre], ', ');
var locality = this.join_([row.Locality, row.Postcode], ', ');
var store = new storeLocator.Store(row.uuid, position, features, {
title: row.Fcilty_nam,
address: this.join_([shop, row.Street_add, locality], '<br>'),
hours: row.Hrs_of_bus
});
stores.push(store);
}
return stores;
};
/**
* Joins elements of an array that are non-empty and non-null.
* @private
* @param {!Array} arr array of elements to join.
* @param {string} sep the separator.
* @return {string}
*/
MedicareDataSource.prototype.join_ = function(arr, sep) {
var parts = [];
for (var i = 0, ii = arr.length; i < ii; i++) {
arr[i] && parts.push(arr[i]);
}
return parts.join(sep);
};
/**
* Very rudimentary CSV parsing - we know how this particular CSV is formatted.
* IMPORTANT: Don't use this for general CSV parsing!
* @private
* @param {string} row
* @return {Array.<string>}
*/
MedicareDataSource.prototype.parseRow_ = function(row) {
// Strip leading quote.
if (row.charAt(0) == '"') {
row = row.substring(1);
}
// Strip trailing quote. There seems to be a character between the last quote
// and the line ending, hence 2 instead of 1.
if (row.charAt(row.length - 2) == '"') {
row = row.substring(0, row.length - 2);
}
row = row.split('","');
return row;
};
/**
* Creates an object mapping headings to row elements.
* @private
* @param {Array.<string>} headings
* @param {Array.<string>} row
* @return {Object}
*/
MedicareDataSource.prototype.toObject_ = function(headings, row) {
var result = {};
for (var i = 0, ii = row.length; i < ii; i++) {
result[headings[i]] = row[i];
}
return result;
};
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