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Add weather data with db cache (issue #4)

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Skylar Ittner 2016-09-27 01:55:12 -06:00
parent d57141f447
commit 28bec21d7f
3 changed files with 37 additions and 0 deletions
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<?php
require 'required.php';
require 'onlyloggedin.php';
// Validate input
if (is_empty($VARS['lat']) || is_empty($VARS['long'])) {
sendError("Missing information.", true);
}
if (!preg_match('/-?[0-9]{1,3}\.[0-9]{2,}/', $VARS['lat'])) {
sendError("Latitude (lat) is in the wrong format.", true);
}
if (!preg_match('/-?[0-9]{1,3}\.[0-9]{2,}/', $VARS['long'])) {
sendError("Longitude (long) is in the wrong format.", true);
}
// Round to 2 digits (approx. 1.1km)
$lat = number_format((float) $VARS['lat'], 2, '.', '');
$long = number_format((float) $VARS['long'], 2, '.', '');
// Delete old records
$database->delete('weathercache', ["date[<]" => date('Y-m-d H:i:s', strtotime('-1 hour'))]);
// If we don't get a cache hit, request from the API
if (!$database->has('weathercache', ["AND" => ["latitude" => $lat, "longitude" => $long]])) {
$weather = json_decode(file_get_contents("https://api.darksky.net/forecast/" . DARKSKY_APIKEY . "/$lat,$long"), TRUE);
$currentjson = json_encode($weather['currently']);
$database->insert('weathercache', ["latitude" => $lat, "longitude" => $long, "#date" => "NOW()", "currentjson" => $currentjson]);
}
// Build output array
$output = ["status" => "OK", "currently" => []];
// Get the cached record and put it in the output array
$output['currently'] = json_decode($database->select('weathercache', 'currentjson', ["AND" => ["latitude" => $lat, "longitude" => $long]])[0], TRUE);
// Re-encode the data to JSON and send to client
echo json_encode($output);