66 lines
2.2 KiB
PHP
Executable File
66 lines
2.2 KiB
PHP
Executable File
<?php
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// AJAX call to fetch a new background image
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// http://stackoverflow.com/a/24707821 => use instead of file_get_contents for external URL's
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function curl_get_contents($url, $headers = null) {
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$ch = curl_init();
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curl_setopt($ch, CURLOPT_HEADER, 0);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
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curl_setopt($ch, CURLOPT_URL, $url);
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// Include potential headers with request
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if (!empty($headers)) {
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curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
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}
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$data = curl_exec($ch);
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curl_close($ch);
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return $data;
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}
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// Traverse a JSON object given a string selector
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function traverse_json($json, $selector) {
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$regex = "\[\'?([{}a-z0-9_]+)\'?\]";
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preg_match_all('/' . $regex . '/i', $selector, $matches);
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// Go through each regex match and traverse the JSON object given the keys
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$obj = $json;
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foreach ($matches[1] as $i => $match) {
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if ($match == '{random}' && is_array($obj)) {
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// Let's fetch a random index of the array
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$rand = rand(0, count($obj));
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$obj = $obj[$rand];
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} else {
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// Keep traversing the object
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$obj = $obj[$match];
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}
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}
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return $obj;
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}
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$config = json_decode(file_get_contents(dirname(__FILE__) . "/../../config.json"), true);
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if (!empty($config['custom_url'])) {
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// We're fetching from a custom URL
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$json = json_decode(curl_get_contents($config['custom_url'], $config['custom_url_headers']), true);
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$image_url = traverse_json($json, $config['custom_url_selector']);
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echo json_encode(array('success' => 1, 'url' => $image_url));
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} else if (!empty($config['unsplash_client_id'])) {
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// We're fetching from Unsplash's API
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$url = "https://api.unsplash.com/photos/random?per_page=1&client_id=" . $config['unsplash_client_id'];
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$json = json_decode(curl_get_contents($url), true);
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$image_url = $json['urls']['regular'];
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$image_user_name = $json['user']['name'];
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$image_user_url = $json['user']['links']['html'];
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echo json_encode(array('success' => 1, 'url' => $image_url, 'image_user_name' => $image_user_name, 'image_user_url' => $image_user_url));
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}
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die();
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?>
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