/**
* @ngdoc service
* @name Attr2Options
* @description
* Converts tag attributes to options used by google api v3 objects, map, marker, polygon, circle, etc.
*/
/*jshint -W030*/
ngMap.service('Attr2Options', ['$parse', 'NavigatorGeolocation', 'GeoCoder', function($parse, NavigatorGeolocation, GeoCoder) {
var SPECIAL_CHARS_REGEXP = /([\:\-\_]+(.))/g;
var MOZ_HACK_REGEXP = /^moz([A-Z])/;
var orgAttributes = function(el) {
(el.length > 0) && (el = el[0]);
var orgAttributes = {};
for (var i=0; i<el.attributes.length; i++) {
var attr = el.attributes[i];
orgAttributes[attr.name] = attr.value;
}
return orgAttributes;
}
var camelCase = function(name) {
return name.
replace(SPECIAL_CHARS_REGEXP, function(_, separator, letter, offset) {
return offset ? letter.toUpperCase() : letter;
}).
replace(MOZ_HACK_REGEXP, 'Moz$1');
}
var JSONize = function(str) {
try { // if parsable already, return as it is
JSON.parse(str);
return str;
} catch(e) { // if not parsable, change little
return str
// wrap keys without quote with valid double quote
.replace(/([\$\w]+)\s*:/g, function(_, $1){return '"'+$1+'":'})
// replacing single quote wrapped ones to double quote
.replace(/'([^']+)'/g, function(_, $1){return '"'+$1+'"'})
}
}
var toOptionValue = function(input, options) {
var output, key=options.key, scope=options.scope;
try { // 1. Number?
var num = Number(input);
if (isNaN(num)) {
throw "Not a number";
} else {
output = num;
}
} catch(err) {
try { // 2.JSON?
if (input.match(/^[\+\-]?[0-9\.]+,[ ]*\ ?[\+\-]?[0-9\.]+$/)) { // i.e "-1.0, 89.89"
input = "["+input+"]";
}
output = JSON.parse(JSONize(input));
if (output instanceof Array) {
var t1stEl = output[0];
if (t1stEl.constructor == Object) { // [{a:1}] : not lat/lng ones
} else if (t1stEl.constructor == Array) { // [[1,2],[3,4]]
output = output.map(function(el) {
return new google.maps.LatLng(el[0], el[1]);
});
} else if(!isNaN(parseFloat(t1stEl)) && isFinite(t1stEl)) {
return new google.maps.LatLng(output[0], output[1]);
}
}
} catch(err2) {
// 3. Object Expression. i.e. LatLng(80,-49)
if (input.match(/^[A-Z][a-zA-Z0-9]+\(.*\)$/)) {
try {
var exp = "new google.maps."+input;
output = eval(exp); // TODO, still eval
} catch(e) {
output = input;
}
// 4. Object Expression. i.e. MayTypeId.HYBRID
} else if (input.match(/^([A-Z][a-zA-Z0-9]+)\.([A-Z]+)$/)) {
try {
var matches = input.match(/^([A-Z][a-zA-Z0-9]+)\.([A-Z]+)$/);
output = google.maps[matches[1]][matches[2]];
} catch(e) {
output = input;
}
// 5. Object Expression. i.e. HYBRID
} else if (input.match(/^[A-Z]+$/)) {
try {
var capitalizedKey = key.charAt(0).toUpperCase() + key.slice(1);
if (key.match(/temperatureUnit|windSpeedUnit|labelColor/)) {
capitalizedKey = capitalizedKey.replace(/s$/,"");
output = google.maps.weather[capitalizedKey][input];
} else {
output = google.maps[capitalizedKey][input];
}
} catch(e) {
output = input;
}
} else {
output = input;
}
} // catch(err2)
} // catch(err)
return output;
};
var setDelayedGeoLocation = function(object, method, param, options) {
options = options || {};
var centered = object.centered || options.centered;
var errorFunc = function() {
console.log('error occurred while', object, method, param, options);
var fallbackLocation = options.fallbackLocation || new google.maps.LatLng(0,0);
object[method](fallbackLocation);
};
if (!param || param.match(/^current/i)) { // sensored position
NavigatorGeolocation.getCurrentPosition().then(
function(position) { // success
var lat = position.coords.latitude;
var lng = position.coords.longitude;
var latLng = new google.maps.LatLng(lat,lng);
object[method](latLng);
if (centered) {
object.map.setCenter(latLng);
}
options.callback && options.callback.apply(object);
},
errorFunc
);
} else { //assuming it is address
GeoCoder.geocode({address: param}).then(
function(results) { // success
object[method](results[0].geometry.location);
if (centered) {
object.map.setCenter(results[0].geometry.location);
}
},
errorFunc
);
}
};
var getAttrsToObserve = function(attrs) {
var attrsToObserve = [];
if (attrs["ng-repeat"] || attrs.ngRepeat) { // if element is created by ng-repeat, don't observe any
} else {
for (var attrName in attrs) {
var attrValue = attrs[attrName];
if (attrValue && attrValue.match(/\{\{.*\}\}/)) { // if attr value is {{..}}
console.log('setting attribute to observe', attrName, camelCase(attrName), attrValue);
attrsToObserve.push(camelCase(attrName));
}
}
}
return attrsToObserve;
};
var observeAttrSetObj = function(orgAttrs, attrs, obj) {
var attrsToObserve = getAttrsToObserve(orgAttrs);
if (Object.keys(attrsToObserve).length) {
console.log(obj, "attributes to observe", attrsToObserve);
}
for (var i=0; i<attrsToObserve.length; i++) {
observeAndSet(attrs, attrsToObserve[i], obj);
}
}
var observeAndSet = function(attrs, attrName, object) {
attrs.$observe(attrName, function(val) {
if (val) {
console.log('observing ', object, attrName, val);
var setMethod = camelCase('set-'+attrName);
var optionValue = toOptionValue(val, {key: attrName});
console.log('setting ', object, attrName, 'with value', optionValue);
if (object[setMethod]) { //if set method does exist
/* if an location is being observed */
if (attrName.match(/center|position/) &&
typeof optionValue == 'string') {
setDelayedGeoLocation(object, setMethod, optionValue);
} else {
object[setMethod](optionValue);
}
}
}
});
};
return {
/**
* filters attributes by skipping angularjs methods $.. $$..
* @memberof Attr2Options
* @param {Hash} attrs tag attributes
* @returns {Hash} filterd attributes
*/
filter: function(attrs) {
var options = {};
for(var key in attrs) {
if (key.match(/^\$/) || key.match(/^ng[A-Z]/)) {
} else {
options[key] = attrs[key];
}
}
return options;
},
/**
* converts attributes hash to Google Maps API v3 options
* ```
* . converts numbers to number
* . converts class-like string to google maps instance
* i.e. `LatLng(1,1)` to `new google.maps.LatLng(1,1)`
* . converts constant-like string to google maps constant
* i.e. `MapTypeId.HYBRID` to `google.maps.MapTypeId.HYBRID`
* i.e. `HYBRID"` to `google.maps.MapTypeId.HYBRID`
* ```
* @memberof Attr2Options
* @param {Hash} attrs tag attributes
* @param {scope} scope angularjs scope
* @returns {Hash} options converted attributess
*/
getOptions: function(attrs, scope) {
var options = {};
for(var key in attrs) {
if (attrs[key]) {
if (key.match(/^on[A-Z]/)) { //skip events, i.e. on-click
continue;
} else if (key.match(/ControlOptions$/)) { // skip controlOptions
continue;
} else {
options[key] = toOptionValue(attrs[key], {scope:scope, key: key});
}
} // if (attrs[key])
} // for(var key in attrs)
return options;
},
/**
* converts attributes hash to scope-specific event function
* @memberof Attr2Options
* @param {scope} scope angularjs scope
* @param {Hash} attrs tag attributes
* @returns {Hash} events converted events
*/
getEvents: function(scope, attrs) {
var events = {};
var toLowercaseFunc = function($1){
return "_"+$1.toLowerCase();
};
var eventFunc = function(attrValue) {
var matches = attrValue.match(/([^\(]+)\(([^\)]*)\)/);
var funcName = matches[1];
var argsStr = matches[2].replace(/event[ ,]*/,''); //remove string 'event'
var args = scope.$eval("["+argsStr+"]");
return function(event) {
function index(obj,i) {return obj[i]}
f = funcName.split('.').reduce(index, scope)
f.apply(this, [event].concat(args));
scope.$apply();
}
}
for(var key in attrs) {
if (attrs[key]) {
if (!key.match(/^on[A-Z]/)) { //skip if not events
continue;
}
//get event name as underscored. i.e. zoom_changed
var eventName = key.replace(/^on/,'');
eventName = eventName.charAt(0).toLowerCase() + eventName.slice(1);
eventName = eventName.replace(/([A-Z])/g, toLowercaseFunc);
var attrValue = attrs[key];
events[eventName] = new eventFunc(attrValue);
}
}
return events;
},
/**
* control means map controls, i.e streetview, pan, etc, not a general control
* @memberof Attr2Options
* @param {Hash} filtered filtered tag attributes
* @returns {Hash} Google Map options
*/
getControlOptions: function(filtered) {
var controlOptions = {};
if (typeof filtered != 'object')
return false;
for (var attr in filtered) {
if (filtered[attr]) {
if (!attr.match(/(.*)ControlOptions$/)) {
continue; // if not controlOptions, skip it
}
//change invalid json to valid one, i.e. {foo:1} to {"foo": 1}
var orgValue = filtered[attr];
var newValue = orgValue.replace(/'/g, '"');
newValue = newValue.replace(/([^"]+)|("[^"]+")/g, function($0, $1, $2) {
if ($1) {
return $1.replace(/([a-zA-Z0-9]+?):/g, '"$1":');
} else {
return $2;
}
});
try {
var options = JSON.parse(newValue);
for (var key in options) { //assign the right values
if (options[key]) {
var value = options[key];
if (typeof value === 'string') {
value = value.toUpperCase();
} else if (key === "mapTypeIds") {
value = value.map( function(str) {
if (str.match(/^[A-Z]+$/)) { // if constant
return google.maps.MapTypeId[str.toUpperCase()];
} else { // else, custom map-type
return str;
}
});
}
if (key === "style") {
var str = attr.charAt(0).toUpperCase() + attr.slice(1);
var objName = str.replace(/Options$/,'')+"Style";
options[key] = google.maps[objName][value];
} else if (key === "position") {
options[key] = google.maps.ControlPosition[value];
} else {
options[key] = value;
}
}
}
controlOptions[attr] = options;
} catch (e) {
console.error('invald option for', attr, newValue, e, e.stack);
}
}
} // for
return controlOptions;
}, // function
toOptionValue: toOptionValue,
camelCase: camelCase,
setDelayedGeoLocation: setDelayedGeoLocation,
getAttrsToObserve: getAttrsToObserve,
observeAndSet: observeAndSet,
observeAttrSetObj: observeAttrSetObj,
orgAttributes: orgAttributes
}; // return
}]);