<?php
/*
Set GOOGLE_API_KEY and set it in constants.

Google Geocoding API
http://code.google.com/apis/maps/documentation/geocoding/

GOOGLE RESPONSE CODES


200: Successful request (at least one placemark was returned).
400: Bad request (the server was unable to understand the request).
500: Server error (an unknown internal error occurred).
601: Missing query. This means the q parameter was not specified (or was an empty string).
602: Unknown address. This means that the request was performed but no placemarks were found.
603: Unavailable address. The given address could not be returned due to legal or contractual reasons.
610: An invalid Google Maps API key was specified.
620: Too many queries have been performed using the given API key.

STATUS CODES

    * "OK" indicates that no errors occurred; the address was successfully parsed and at least one geocode was returned.
    * "ZERO_RESULTS" indicates that the geocode was successful but returned no results. This may occur if the geocode was passed a non-existent address or a latlng in a remote location.
    * "OVER_QUERY_LIMIT" indicates that you are over your quota.
    * "REQUEST_DENIED" indicates that your request was denied, generally because of lack of a sensor parameter.
    * "INVALID_REQUEST" generally indicates that the query (address or latlng) is missing.
*/


function geocodeAddress($theAddress){
	$address = urlencode($theAddress);
	 
	//If you want an extended data set, change the output to "xml" instead of csv
	$url = "https://maps.googleapis.com/maps/api/geocode/json?address=" . $address . "&key=" . GOOGLE_API_KEY;
	
	//Set up a CURL request, telling it not to spit back headers, and to throw out a user agent.
	$ch = curl_init();
	 
	curl_setopt($ch, CURLOPT_URL, $url);
	curl_setopt($ch, CURLOPT_HEADER,0); //Change this to a 1 to return headers
	curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER["HTTP_USER_AGENT"]);
	curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
	$data = curl_exec($ch);
	curl_close($ch);	
	
	$json = json_decode($data);
	$status = $json->status;

	if ($status === "OK"){
		$theLat = $json->results[0]->geometry->location->lat;
		$theLng = $json->results[0]->geometry->location->lng;
		
		//Only works for US locations right now	
		foreach ($json->results[0]->address_components as $address) {
			//Get state
			if ($address->types[0] == "locality") {
				$city = $address->short_name;
			}else if ($address->types[0] == "administrative_area_level_1") {		
				$state = $address->short_name;
			//Get country	
			}else if ($address->types[0] == "country") {	
				$country = $address->short_name;
			}else if ($address->types[0] == "postal_code") {	
				$postal = $address->short_name;
			}	
		}		
		//Clear invalid states/countries (US ONLY FOR NOW)
		if ($country != "US" || !ValidationUtils::isValidUSState($state)){
			$country = "";
			$state = "";
			$postal = "";
			$status = "NON_US";
		}		
	}	
	
	/*
	echo $theLat . "<br />";
	echo $theLng . "<br />";
	echo $status . "<br />";	
	echo $country . "<br />";
	echo $state . "<br />";	
	*/
	
	@$obj->lat = $theLat;
	$obj->long = $theLng;	
	$obj->status = $status;	
	$obj->country = $country;	
	$obj->state = $state;	
	$obj->city = $city;	
	$obj->postal = $postal;
	
	return $obj;
}
?>