/*global define, console, $, RAMP */
//the "use strict" forces the ECMA Script 5 interpretation of the code
/**
* QuickZoom submodule
*
* @module RAMP
* @submodule QuickZoom
* @main QuickZoom
*/
/**
* The QuickZoom class handles zooming in the map based on province, city, or postal code.
* These zoom in services rely on web services which return extent values based the user-entered province, city, or postal code
*
* @class QuickZoom
* @uses dojo/_base/declare
* @uses dojo/_base/array
* @uses dojo/_base/lang
* @uses dojo/dom
* @uses dojo/dom-construct
* @uses dijit/form/Form
* @uses dijit/form/TextBox
* @uses dijit/form/Select
* @uses dijit/form/Button
* @uses esri/geometry/Extent
* @uses esri/tasks/QueryTask
* @uses esri/tasks/query
* @uses GlobalStorage
* @uses Map
* @uses Util
*/
define([
/* Dojo */
"dojo/_base/declare", "dojo/_base/array", "dojo/_base/lang", "dojo/dom", "dojo/dom-construct", "dijit/form/Form",
"dijit/form/TextBox", "dijit/form/Select", "dijit/form/Button",
/* Esri */
"esri/geometry/Extent", "esri/tasks/QueryTask", "esri/tasks/query",
/* Ramp */
"ramp/globalStorage", "ramp/map",
/* Util */
"utils/util"],
function (
/* Dojo */
declare, dojoArray, dojoLang, dom, domConstruct, Form, TextBox, Select, Button,
Extent, QueryTask, Query,
/* Ramp */
GlobalStorage, RampMap,
/* Util */
UtilMisc) {
"use strict";
return declare(null, {
/*
* Defines the UI controls for the province, city, and postal code selections
* @method constructor
* @constructor
*
*/
constructor: function () {
this.config = RAMP.config;
this.form = new Form({
style: "overflow:hidden; clear:none;"
});
var className = "quickZoom"; // used for CSS styling
this.provinceSelect = new Select({
id: "quickZoomProvince",
class: className,
options: []
});
this.citySelect = new Select({
id: "quickZoomCity",
class: className,
options: []
});
this.postalCodeTextbox = new TextBox({
id: "quickZoomPostalCode",
class: className,
style: "width : 30%"
});
this.button = new Button({
label: "Find",
id: "quickZoomButton",
class: className
});
var that = this; // for local access to "this"
function _addNode(domNode) {
that.form.domNode.appendChild(domNode);
}
function _addLabel(text) {
var node = domConstruct.create("label", {
class: className,
innerHTML: text
});
_addNode(node);
return node;
}
_addLabel("Choose province:");
_addNode(this.provinceSelect.domNode);
_addLabel("City:");
_addNode(this.citySelect.domNode);
_addLabel("or enter postal code (e.g. A1A):");
_addNode(this.postalCodeTextbox.domNode);
_addNode(this.button.domNode);
this.errorText = _addLabel("");
},
_setError: function (errorMsg) {
console.log(errorMsg);
$(this.errorText).text(errorMsg);
},
/*
* This adds the search tools to the UI and populates the UI controls: Province dropdown, city drop down, postal code text box
*
* @method init
* @param {Object} where A DOM object where the dropdowns will be placed
* @constructor
*/
init: function (where) {
var provinceSelect = this.provinceSelect,
citySelect = this.citySelect,
config = this.config,
that = this; // for local access to "this"
/**
* Change the extent of the map based on the extent data
* retrieved from the given url
*
* @method changeExtent
* @private
* @param {String} url
* @param {Object} query
*/
function changeExtent(url, query) {
query.returnGeometry = true;
var queryTask = new QueryTask(url);
queryTask.execute(query,
function (featureSet) {
if (featureSet.features.isEmpty()) {
that._setError("invalid query");
return;
}
var extent = featureSet.features[0].geometry.getExtent();
if (RampMap.getMaxExtent().contains(extent)) {
RampMap.getMap().setExtent(extent);
that._setError("");
} else {
that._setError("beyond max extent");
}
},
function (error) {
console.log("Could not load extent from service");
console.log(error);
});
}
/**
* Populate the given dropdown with data from the given url.
*
* @method populateDropDown
* @param {String} url the url to the service containing the data to populate the dropdown
* @param {DObject} select the dojo Select object to populate
* @param {Object} query to execute
* @param {Function} mapFunc the function to convert each element in the retrieved data to a label that can be added to the dropdown menu
*/
function populateDropDown(url, select, query, mapFunc) {
// Clear the dropdown
select.removeOption(select.getOptions());
var queryTask = new QueryTask(url);
queryTask.execute(query,
function (featureSet) {
// Populate the dropdown from a list retrieved
// from service
select.addOption(dojoArray.map(featureSet.features, mapFunc));
},
function (error) {
console.log("Could not populate dropdown");
console.log(error);
});
}
// Populate the province dropdown from a list retrieved
// from service
provinceSelect.loadDropDown(function () {
var provinceConfig = config.quickzoom.province,
query = new Query();
query.where = "OBJECTID>0";
query.outFields = [provinceConfig.shortName, provinceConfig.name];
populateDropDown(provinceConfig.url, provinceSelect, query,
function (feature) {
var shortName = feature.attributes[provinceConfig.shortName];
return {
label: feature.attributes[provinceConfig.name],
value: shortName,
selected: shortName === provinceConfig.selectedProv
};
});
});
/**
* Populates the city dropdown menu with the cities in the
* selected province.
*
* @method populateCityDropDown
* @private
* @param {String} prov
*/
function populateCityDropDown(prov) {
var cityConfig = config.quickzoom.city,
query = new Query();
query.where = UtilMisc.getWhereClause(cityConfig.province, prov);
query.outFields = [cityConfig.name, cityConfig.id];
populateDropDown(cityConfig.url, citySelect, query,
function (feature) {
return {
label: feature.attributes[cityConfig.name],
value: feature.attributes[cityConfig.id],
selected: false
};
});
}
citySelect.loadDropDown(function () {
// Populate with the cities of the default province first
populateCityDropDown(config.quickzoom.province.selectedProv);
});
provinceSelect.on("change", function () {
// Change the extent, then populate the city with the cities in the province
var provConfig = config.quickzoom.province,
prov = provinceSelect.get("value"),
query = new Query();
query.where = UtilMisc.getWhereClause(provConfig.shortName, prov);
changeExtent(provConfig.url, query);
populateCityDropDown(prov);
});
citySelect.on("change", function () {
var cityConfig = config.quickzoom.city,
city = citySelect.get("value"),
query = new Query();
query.where = UtilMisc.getWhereClause(cityConfig.id, city);
changeExtent(cityConfig.url, query);
});
/**
* Returns true if the given postal code is valid, false otherwise.
*
* @method validatePostalCode
* @private
* @param {String} fsa fsa
*/
function validatePostalCode(fsa) {
//Perform case insensitive matching
var regexp = /[abcdefghijklmnopqrstuvwxyz]\d[abcdefghijklmnopqrstuvwxyz]/i;
//Remove space from the input FSA
fsa = dojoLang.trim(fsa);
//Detect if the user has entered the postal code in correct format
if (fsa) {
var result = fsa.match(regexp);
return (result && result.length === 1);
}
return false;
}
this.button.on("click", dojoLang.hitch(this, function () {
var postalCode = this.postalCodeTextbox.get("value");
if (validatePostalCode(postalCode)) {
var postalConfig = config.quickzoom.postalCode,
query = new Query();
query.where = UtilMisc.getWhereClause(postalConfig.id, postalCode);
changeExtent(postalConfig.url, query);
} else {
console.log("invalid postal code!");
that._setError("invalid postal code");
}
}));
var whereNode = dom.byId(where);
domConstruct.place(this.form.domNode, whereNode, "replace");
}
});
});
Reusable Accessible Mapping Platform