git.m6w6.name Git - m6w6/seekat/blob - lib/API/Call/Cache.php

   1 <?php
   2
   3 namespace seekat\API\Call;
   4
   5 use http\Client\Request;
   6 use http\Client\Response;
   7 use seekat\API\Call\Cache\Control;
   8 use seekat\API\Call\Cache\Service;
   9 use seekat\API\Call\Cache\Service\Hollow;
  10
  11
  12 class Cache
  13 {
  14         /**
  15          * @var Service
  16          */
  17         private $cache;
  18
  19         /**
  20          * @param Service $cache
  21          */
  22         public function __construct(Service $cache = null) {
  23                 $this->cache = $cache ?? new Hollow;
  24         }
  25
  26         /**
  27          * Save call data
  28          * @param Request $request
  29          * @param Response $response
  30          * @return bool
  31          */
  32         public function save(Request $request, Response $response) : bool {
  33                 $ctl = new Control($request);
  34                 if (!$ctl->isValid()) {
  35                         return false;
  36                 }
  37
  38                 $time = time();
  39                 if ($time - 1 <= $response->getHeader("X-Cache-Time")) {
  40                         return true;
  41                 }
  42                 $response->setHeader("X-Cache-Time", $time);
  43
  44                 return $this->cache->store($ctl->getKey(), $response);
  45         }
  46
  47         /**
  48          * Attempt to load call data
  49          * @param Request $request
  50          * @param Response $response out param
  51          * @return bool
  52          */
  53         public function load(Request $request, Response &$response = null) : bool {
  54                 $ctl = new Control($request);
  55                 if (!$ctl->isValid()) {
  56                         return false;
  57                 }
  58
  59                 if (!$this->cache->fetch($ctl->getKey(), $response)) {
  60                         return false;
  61                 }
  62                 if ($ctl->isStale($response)) {
  63                         if (($lmod = $response->getHeader("Last-Modified"))) {
  64                                 $request->setOptions(["lastmodified" => strtotime($lmod)]);
  65                         }
  66                         if (($etag = $response->getHeader("ETag"))) {
  67                                 $request->setOptions(["etag" => $etag]);
  68                         }
  69                         return false;
  70                 }
  71                 return true;
  72         }
  73
  74 }