dev-chiefworks
389 lines
12 KiB
PHP
389 lines
12 KiB
PHP
<?php
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class GooglePlacesClient
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{
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public function get($url)
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{
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$curl = curl_init();
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$options = array(
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CURLOPT_URL => $url,
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CURLOPT_HEADER => false,
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CURLOPT_SSL_VERIFYPEER => true,
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CURLOPT_RETURNTRANSFER => true,
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);
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curl_setopt_array($curl, $options);
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$response = curl_exec($curl);
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if ($error = curl_error($curl))
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{
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throw new \Exception('CURL Error: ' . $error);
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}
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curl_close($curl);
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return $response;
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}
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}
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class GooglePlaces
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{
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public $client = '';
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public $sleep = 3;
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private $key = '';
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private $base_url = 'https://maps.googleapis.com/maps/api/place';
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private $method = null;
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private $response = null;
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public $keyword = null;
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public $language = 'en';
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public $location = null;
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public $output = 'json';
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public $name = null;
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public $pagetoken = null;
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public $radius = null;
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public $rankby = 'prominence';
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public $sensor = false;
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public $types = null;
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public $placeid = null;
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public $reference = null;
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public $opennow = null;
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public $input = null;
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public $subradius = null;
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public $getmax = true;
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private $grid = null;
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private $exceptions = array(
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'base_url', 'client', 'exceptions', 'getmax', 'grid', 'method',
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'output', 'pagetoken', 'response', 'sleep', 'subradius',
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);
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public function __construct($key, $client = false)
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{
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$this->key = $key;
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$this->client = $client ? $client : new GooglePlacesClient();
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}
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function __set($variable, $value)
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{
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// Compensates for mixed variable naming
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$variable = str_replace('_', '', strtolower($variable));
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$this->$variable = $value;
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}
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public function __call($method, $arguments)
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{
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$this->output = strtolower($this->output);
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if (!in_array($this->output, array('json', 'xml')))
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{
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throw new \Exception('Invalid output, please specify either "json" or "xml".');
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}
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$method = $this->method = strtolower($method);
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$url = implode('/', array($this->base_url, $method, $this->output));
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$parameters = array();
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$parameters = $this->parameterBuilder($parameters);
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$parameters = $this->methodChecker($parameters, $method);
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if (!empty($this->subradius))
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{
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return $this->subdivide($url, $parameters);
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}
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if ($this->pagetoken !== null)
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{
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$parameters['pagetoken'] = $this->pagetoken;
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}
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$result = $this->queryGoogle($url, $parameters);
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return $result;
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}
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/**
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* Loops through all of our variables to make a parameter list
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*/
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private function parameterBuilder($parameters)
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{
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foreach (get_object_vars($this) as $variable => $value)
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{
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// Except these variables
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if (!in_array($variable, $this->exceptions))
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{
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// Assuming it's not null
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if ($value !== null)
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{
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// Converts boolean to string
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if (is_bool($value))
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{
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$value = $value ? 'true' : 'false';
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}
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switch ($variable)
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{
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// Allows LatLng to be passed as an array
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case 'location':
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if (is_array($value))
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{
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// Just in case it's an associative array
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$value = array_values($value);
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$value = $value[0] . ',' . $value[1];
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}
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break;
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// Checks that it's a value rank by value
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case 'rankby':
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$value = strtolower($value);
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if (!in_array($value, array('prominence', 'distance')))
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{
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throw new \Exception('Invalid rank by value, please specify either "prominence" or "distance".');
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}
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break;
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// Allows types to be passed as an array
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case 'types':
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if (is_array($value))
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{
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$value = implode('|', $value);
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}
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break;
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}
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$parameters[$variable] = $value;
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}
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}
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}
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return $parameters;
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}
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/**
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* takes the parameters and method to throw exceptions or modify parameters as needed
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* @todo Method to sanity check passed types
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*/
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private function methodChecker($parameters, $method)
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{
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if (!isset($parameters['pagetoken']))
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{
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switch ($method)
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{
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case 'nearbysearch':
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if (!isset($parameters['location']))
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{
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throw new \Exception('You must specify a location before calling nearbysearch().');
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}
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elseif (isset($parameters['rankby']))
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{
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switch ($parameters['rankby'])
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{
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case 'distance':
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if (!isset($parameters['keyword'])
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&& !isset($parameters['name'])
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&& !isset($parameters['types']))
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{
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throw new \Exception('You much specify at least one of the following: "keyword", "name", "types".');
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}
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if (isset($parameters['radius']))
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{
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unset($this->radius, $parameters['radius']);
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}
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break;
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case 'prominence':
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if (!isset($parameters['radius']))
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{
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throw new \Exception('You must specify a radius.');
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}
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break;
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}
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}
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break;
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case 'radarsearch':
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if (!isset($parameters['location']))
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{
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throw new \Exception('You must specify a location before calling radarsearch().');
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}
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elseif (!isset($parameters['radius']))
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{
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throw new \Exception('You must specify a radius.');
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}
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elseif (empty($parameters['keyword'])
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&& empty($parameters['name'])
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&& empty($parameters['types']))
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{
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throw new \Exception('You much specify at least one of the following: "keyword", "name", "types".');
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}
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if (isset($parameters['rankby']))
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{
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unset($this->rankby, $parameters['rankby']);
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}
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break;
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case 'details':
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if (!(isset($parameters['reference'])
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^ isset($parameters['placeid'])))
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{
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throw new \Exception('You must specify either a "placeid" or a "reference" (but not both) before calling details().');
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}
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if (isset($parameters['rankby']))
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{
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unset($this->rankby, $parameters['rankby']);
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}
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break;
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case 'autocomplete':
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/*if (!isset($parameters['location']))
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{
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throw new \Exception('You must specify a location before calling autocomplete().');
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}
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elseif (!isset($parameters['radius']))
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{
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throw new \Exception('You must specify a radius.');
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}
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else*/if (empty($parameters['input']))
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{
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throw new \Exception('You much specify the user entered input string.');
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}
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break;
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}
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}
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return $parameters;
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}
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/**
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* Submits request via curl, sets the response, then returns the response
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*/
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private function queryGoogle($url, $parameters)
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{
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if ($this->pagetoken !== null)
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{
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$parameters['pagetoken'] = $this->pagetoken;
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sleep($this->sleep);
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}
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// Couldn't seem to get http_build_query() to work right so...
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$querystring = '';
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foreach ($parameters as $variable => $value)
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{
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if ($querystring != '')
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{
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$querystring .= '&';
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}
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$querystring .= $variable . '=' . urlencode($value);
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}
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$response = $this->client->get($url . '?' . $querystring);
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if ($this->output == 'json')
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{
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$response = json_decode($response, true);
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if ($response === null)
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{
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throw new \Exception('The returned JSON was malformed or nonexistent.');
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}
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}
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else
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{
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throw new \Exception('XML is terrible, don\'t use it, ever.');
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}
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$this->response = $response;
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return $this->response;
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}
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/**
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* Returns the longitude equal to a given distance (meters) at a given latitude
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*/
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public function meters2lng($meters, $latitude)
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{
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return $meters / (cos(deg2rad($latitude)) * 40075160 / 360);
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}
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/**
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* Returns the latitude equal to a given distance (meters)
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*/
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public function meters2lat($meters)
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{
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return $meters / (40075160 / 360);
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}
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/**
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* Returns the aggregated responses for a subdivided search
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*/
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private function subdivide($url, $parameters)
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{
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if ($this->subradius < 200)
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{
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throw new \Exception('Subradius should be at least 200 meters.');
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}
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$quotient = $parameters['radius'] / $this->subradius;
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if ($parameters['radius'] % $this->subradius || $quotient % 2)
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{
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throw new \Exception('Subradius should divide evenly into radius.');
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}
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$center = explode(',', $parameters['location']);
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$centerlat = $center[0];
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$centerlng = $center[1];
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$count = $quotient;
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$lati = $this->meters2lat($this->subradius * 2);
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$this->grid['results'] = array();
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for ($i = $count / 2 * -1; $i <= $count / 2; $i++)
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{
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$lat = $centerlat + $i * $lati;
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$lngi = $this->meters2lng($this->subradius * 2, $lat);
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for ($j = $count / 2 * -1; $j <= $count / 2; $j++)
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{
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$lng = $centerlng + $j * $lngi;
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$loc = $lat . ',' . $lng;
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$parameters['location'] = $loc;
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$parameters['radius'] = $this->subradius;
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$pagetoken = true;
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while ($pagetoken)
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{
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$this->queryGoogle($url, $parameters);
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$this->grid[$i][$j] = $this->response;
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$this->grid['results'] = array_merge(
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$this->grid['results'],
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$this->response['results']
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);
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if (isset($this->response['next_page_token']))
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{
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$this->pagetoken = $this->response['next_page_token'];
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}
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else
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{
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$this->pagetoken = null;
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$pagetoken = false;
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}
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}
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}
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}
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return $this->grid;
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}
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}
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