cache server endpoint URLs

[shpub.git] / src / shpub / Config / Endpoints.php

diff --git a/src/shpub/Config/Endpoints.php b/src/shpub/Config/Endpoints.php
index c029b95c55c6a52af4b4e9687ca6331e87e6cf9e..62e7c4905ecd2698c572cc0bac605635747af726 100644 (file)
--- a/src/shpub/Config/Endpoints.php
+++ b/src/shpub/Config/Endpoints.php
@@ -37,5 +37,98 @@ class Config_Endpoints
             || $this->token === null
             || $this->micropub === null;
     }
+
+    public function discover($server)
+    {
+        //TODO: discovery via link headers
+        $sx = simplexml_load_file($server);
+        if ($sx === false) {
+            Log::err('Error loading URL: ' . $server);
+            exit(1);
+        }
+        $sx->registerXPathNamespace('h', 'http://www.w3.org/1999/xhtml');
+
+        $auths = $sx->xpath(
+            '/h:html/h:head/h:link[@rel="authorization_endpoint" and @href]'
+        );
+        if (!count($auths)) {
+            Log::err('No authorization endpoint found');
+            exit(1);
+        }
+        $this->authorization = (string) $auths[0]['href'];
+
+        $tokens = $sx->xpath(
+            '/h:html/h:head/h:link[@rel="token_endpoint" and @href]'
+        );
+        if (!count($tokens)) {
+            Log::err('No token endpoint found');
+            exit(1);
+        }
+        $this->token = (string) $tokens[0]['href'];
+
+        $mps = $sx->xpath(
+            '/h:html/h:head/h:link[@rel="micropub" and @href]'
+        );
+        if (!count($mps)) {
+            Log::err('No micropub endpoint found');
+            exit(1);
+        }
+        $this->micropub = (string) $mps[0]['href'];
+    }
+
+    public function load($server)
+    {
+        $file = $this->getCacheFilePath($server, false);
+        if ($file === false || !file_exists($file)) {
+            return false;
+        }
+        $data = parse_ini_file($file);
+        foreach ($data as $prop => $val) {
+            if (!property_exists($this, $prop)) {
+                Log::err('Invalid cache config key "' . $prop . '"');
+                exit(1);
+            }
+            $this->$prop = $val;
+        }
+        return true;
+    }
+
+    public function save($server)
+    {
+        $file = $this->getCacheFilePath($server, true);
+        if ($file === false) {
+            return false;
+        }
+
+        file_put_contents(
+            $file,
+            'micropub=' . $this->micropub . "\n"
+            . 'media=' . $this->media . "\n"
+            . 'token=' . $this->token . "\n"
+             . 'authorization=' . $this->authorization . "\n"
+        );
+    }
+
+    public function getCacheFilePath($server, $create = false)
+    {
+        if (isset($_SERVER['XDG_CACHE_HOME'])
+            && $_SERVER['XDG_CACHE_HOME'] != ''
+        ) {
+            $cacheBaseDir = $_SERVER['XDG_CACHE_HOME'];
+        } else {
+            if (!isset($_SERVER['HOME']) || $_SERVER['HOME'] == '') {
+                Log::err('Cannot determine home directory');
+                return false;
+            }
+            $cacheBaseDir = $_SERVER['HOME'] . '/.cache';
+        }
+
+        $cacheDir = $cacheBaseDir . '/shpub';
+        if (!is_dir($cacheDir) && $create) {
+            mkdir($cacheDir, 0700, true);
+        }
+        $file = $cacheDir . '/' . urlencode($server) . '.ini';
+        return $file;
+    }
 }
 ?>