1 files changed, 116 insertions, 0 deletions
diff --git a/platform/www/lib/plugins/config/core/Writer.php b/platform/www/lib/plugins/config/core/Writer.php
new file mode 100644
index 0000000..56de621
--- /dev/null
+++ b/platform/www/lib/plugins/config/core/Writer.php
@@ -0,0 +1,116 @@
+<?php
+
+namespace dokuwiki\plugin\config\core;
+use dokuwiki\plugin\config\core\Setting\Setting;
+
+/**
+ * Writes the settings to the correct local file
+ */
+class Writer {
+    /** @var string header info */
+    protected $header = 'Dokuwiki\'s Main Configuration File - Local Settings';
+
+    /** @var string the file where the config will be saved to */
+    protected $savefile;
+
+    /**
+     * Writer constructor.
+     */
+    public function __construct() {
+        global $config_cascade;
+        $this->savefile = end($config_cascade['main']['local']);
+    }
+
+    /**
+     * Save the given settings
+     *
+     * @param Setting[] $settings
+     * @throws \Exception
+     */
+    public function save($settings) {
+        global $conf;
+        if($this->isLocked()) throw new \Exception('no save');
+
+        // backup current file (remove any existing backup)
+        if(file_exists($this->savefile)) {
+            if(file_exists($this->savefile . '.bak.php')) @unlink($this->savefile . '.bak.php');
+            if(!io_rename($this->savefile, $this->savefile . '.bak.php')) throw new \Exception('no backup');
+        }
+
+        if(!$fh = @fopen($this->savefile, 'wb')) {
+            io_rename($this->savefile . '.bak.php', $this->savefile); // problem opening, restore the backup
+            throw new \Exception('no save');
+        }
+
+        $out = $this->getHeader();
+        foreach($settings as $setting) {
+            if($setting->shouldBeSaved()) {
+                $out .= $setting->out('conf', 'php');
+            }
+        }
+
+        fwrite($fh, $out);
+        fclose($fh);
+        if($conf['fperm']) chmod($this->savefile, $conf['fperm']);
+        $this->opcacheUpdate($this->savefile);
+    }
+
+    /**
+     * Update last modified time stamp of the config file
+     *
+     * Will invalidate all DokuWiki caches
+     *
+     * @throws \Exception when the config isn't writable
+     */
+    public function touch() {
+        if($this->isLocked()) throw new \Exception('no save');
+        @touch($this->savefile);
+        $this->opcacheUpdate($this->savefile);
+    }
+
+    /**
+     * Invalidate the opcache of the given file
+     *
+     * @todo this should probably be moved to core
+     * @param string $file
+     */
+    protected function opcacheUpdate($file) {
+        if(!function_exists('opcache_invalidate')) return;
+        opcache_invalidate($file);
+    }
+
+    /**
+     * Configuration is considered locked if there is no local settings filename
+     * or the directory its in is not writable or the file exists and is not writable
+     *
+     * @return bool true: locked, false: writable
+     */
+    public function isLocked() {
+        if(!$this->savefile) return true;
+        if(!is_writable(dirname($this->savefile))) return true;
+        if(file_exists($this->savefile) && !is_writable($this->savefile)) return true;
+        return false;
+    }
+
+    /**
+     * Returns the PHP intro header for the config file
+     *
+     * @return string
+     */
+    protected function getHeader() {
+        return join(
+            "\n",
+            array(
+                '<?php',
+                '/*',
+                ' * ' . $this->header,
+                ' * Auto-generated by config plugin',
+                ' * Run for user: ' . $_SERVER['REMOTE_USER'],
+                ' * Date: ' . date('r'),
+                ' */',
+                '',
+                ''
+            )
+        );
+    }
+}