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<?php |
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namespace Faxity\DI; |
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use Anax\Commons\ContainerInjectableInterface; |
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use Anax\Commons\ContainerInjectableTrait; |
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use Faxity\Fetch\Fetch; |
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/** |
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* DI module for weather forecasts |
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*/ |
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class Weather implements ContainerInjectableInterface |
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{ |
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use ContainerInjectableTrait; |
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/** The base URL of ipstack's api. */ |
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private const DARKSKY_URL = 'https://api.darksky.net'; |
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/** Regex to match a coordinate */ |
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private const COORDS_REGEX = '/^-?\d+(\.\d+)?, ?-?\d+(\.\d+)?$/'; |
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/** |
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* @var string $accessKey The ipstack access key. |
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* @var Fetch $http The http fetch client |
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*/ |
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private $accessKey; |
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private $http; |
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/** |
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* @param string $accessKey access key to ipstacks API |
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* @param Fetch|null $fetch Fetch client (optional) |
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*/ |
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public function __construct(string $accessKey, ?Fetch $fetch = null) |
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{ |
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$this->accessKey = $accessKey; |
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$this->http = $fetch ?? new Fetch(); |
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} |
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/** |
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* Formats temperature, removes prevents -0. |
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* @param float $temp Temperature in celcius |
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* |
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* @return string |
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*/ |
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private function formatTemp(float $temp) : string |
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{ |
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$temp = round($temp); |
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$temp = $temp == 0 ? 0 : $temp; |
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return "{$temp}°C"; |
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} |
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/** |
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* Formats an item from DarkSky API, only extracting the data we want. |
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* @param object $data Item holding the data |
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* @param \DateTimeZone $tz Timezone of the location |
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*/ |
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private function formatWeatherItem(object $data, \DateTimeZone $tz) : object |
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{ |
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$date = new \DateTime("@{$data->time}"); |
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$date->setTimezone($tz); |
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return (object) [ |
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"date" => $date->format("d M, Y"), |
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"summary" => $data->summary ?? "", |
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"icon" => $data->icon, |
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"minTemp" => $this->formatTemp($data->temperatureMin), |
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"maxTemp" => $this->formatTemp($data->temperatureMax), |
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]; |
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} |
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/** |
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* Fetches data from the DarkSky API and formats it. |
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* @param array $requests URLs to send requests to. |
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*/ |
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private function fetchForecast(array $requests) : array |
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{ |
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$bodies = $this->http->getMulti($requests); |
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// Merge the data of the requests |
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return array_reduce($bodies, function ($acc, $body) { |
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// If the exceeded its use, throw error |
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if (isset($body->code)) { |
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throw new \Exception($body->error); |
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} |
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$tz = new \DateTimeZone($body->timezone); |
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$data = $body->daily->data; |
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// Format each requests daily data |
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$items = array_map(function ($item) use ($tz) { |
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return $this->formatWeatherItem($item, $tz); |
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}, $data); |
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return array_merge($acc, $items); |
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}, []); |
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} |
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public function forecast(string $location, bool $pastMonth = false) : object |
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{ |
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if (preg_match(self::COORDS_REGEX, $location)) { |
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// Split and trim user input |
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$coords = array_map(function ($str) { |
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return floatval(trim($str)); |
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}, explode(",", $location)); |
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} else { |
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$coords = $this->di->ip->locate($location); |
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if (is_null($coords)) { |
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throw new \Exception("Positionen är inte en koordinat eller en ip-address."); |
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} |
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} |
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// Unpack coordinates to variables |
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list($lat, $long) = $coords; |
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$url = self::DARKSKY_URL . "/forecast/{$this->accessKey}/{$lat},{$long}"; |
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$params = (object) [ |
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"lang" => "sv", |
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"units" => "si", |
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"exclude" => "currently,minutely,hourly,flags", |
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]; |
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if ($pastMonth) { |
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$now = time(); |
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$requests = array_map(function ($n) use ($now, $url, $params) { |
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$timestamp = $now - ($n * 24 * 60 * 60); |
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return [ |
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"url" => $url . ",{$timestamp}", |
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"params" => $params, |
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]; |
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}, range(1, 30)); |
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$data = $this->fetchForecast($requests); |
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} else { |
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$data = $this->fetchForecast([ |
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[ "url" => $url, "params" => $params ], |
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]); |
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} |
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return (object) [ |
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"coords" => $coords, |
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"data" => $data, |
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]; |
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} |
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} |
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iFaxity /
dbwebb-ramverk1-module
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