Responsiveness, scrolling in link-wrapper

1 files changed, 66 insertions, 0 deletions

diff --git a/hp_assets/lib/ajax_get_image.php b/hp_assets/lib/ajax_get_image.php
new file mode 100644
index 0000000..7910619
--- /dev/null
+++ b/hp_assets/lib/ajax_get_image.php
@@ -0,0 +1,66 @@
+<?php
+
+	// AJAX call to fetch a new background image
+
+  // http://stackoverflow.com/a/24707821 => use instead of file_get_contents for external URL's
+  function curl_get_contents($url, $headers = null) {
+    $ch = curl_init();
+
+    curl_setopt($ch, CURLOPT_HEADER, 0);
+    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+    curl_setopt($ch, CURLOPT_URL, $url);
+
+    // Include potential headers with request
+    if (!empty($headers)) {
+      curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
+    }
+
+    $data = curl_exec($ch);
+    curl_close($ch);
+
+    return $data;
+  }
+
+  // Traverse a JSON object given a string selector
+  function traverse_json($json, $selector) {
+    $regex = "\[\'?([{}a-z0-9_]+)\'?\]";
+    preg_match_all('/' . $regex . '/i', $selector, $matches);
+
+    // Go through each regex match and traverse the JSON object given the keys
+    $obj = $json;
+    foreach ($matches[1] as $i => $match) {
+      if ($match == '{random}' && is_array($obj)) {
+        // Let's fetch a random index of the array
+        $rand = rand(0, count($obj));
+        $obj  = $obj[$rand];
+      } else {
+        // Keep traversing the object
+        $obj = $obj[$match];
+      }
+    }
+
+    return $obj;
+  }
+
+	$config = json_decode(file_get_contents(dirname(__FILE__) . "/../../config.json"), true);
+
+  if (!empty($config['custom_url'])) {
+    // We're fetching from a custom URL
+    $json      = json_decode(curl_get_contents($config['custom_url'], $config['custom_url_headers']), true);
+    $image_url = traverse_json($json, $config['custom_url_selector']);
+
+    echo json_encode(array('success' => 1, 'url' => $image_url));
+  } else if (!empty($config['unsplash_client_id'])) {
+    // We're fetching from Unsplash's API
+  	$url             = "https://api.unsplash.com/photos/random?per_page=1&client_id=" . $config['unsplash_client_id'];
+  	$json            = json_decode(curl_get_contents($url), true);
+  	$image_url       = $json['urls']['regular'];
+  	$image_user_name = $json['user']['name'];
+  	$image_user_url  = $json['user']['links']['html'];
+
+  	echo json_encode(array('success' => 1, 'url' => $image_url, 'image_user_name' => $image_user_name, 'image_user_url' => $image_user_url));
+  }
+
+	die();
+
+?>
\ No newline at end of file