Initial commit

content/lib/plugins/config/core/ConfigParser.php

@@ -0,0 +1,90 @@
+<?php
+
+namespace dokuwiki\plugin\config\core;
+
+/**
+ * A naive PHP file parser
+ *
+ * This parses our very simple config file in PHP format. We use this instead of simply including
+ * the file, because we want to keep expressions such as 24*60*60 as is.
+ *
+ * @author  Chris Smith <chris@jalakai.co.uk>
+ */
+class ConfigParser {
+    /** @var string variable to parse from the file */
+    protected $varname = 'conf';
+    /** @var string the key to mark sub arrays */
+    protected $keymarker = Configuration::KEYMARKER;
+
+    /**
+     * Parse the given PHP file into an array
+     *
+     * When the given files does not exist, this returns an empty array
+     *
+     * @param string $file
+     * @return array
+     */
+    public function parse($file) {
+        if(!file_exists($file)) return array();
+
+        $config = array();
+        $contents = @php_strip_whitespace($file);
+        $pattern = '/\$' . $this->varname . '\[[\'"]([^=]+)[\'"]\] ?= ?(.*?);(?=[^;]*(?:\$' . $this->varname . '|$))/s';
+        $matches = array();
+        preg_match_all($pattern, $contents, $matches, PREG_SET_ORDER);
+
+        for($i = 0; $i < count($matches); $i++) {
+            $value = $matches[$i][2];
+
+            // merge multi-dimensional array indices using the keymarker
+            $key = preg_replace('/.\]\[./', $this->keymarker, $matches[$i][1]);
+
+            // handle arrays
+            if(preg_match('/^array ?\((.*)\)/', $value, $match)) {
+                $arr = explode(',', $match[1]);
+
+                // remove quotes from quoted strings & unescape escaped data
+                $len = count($arr);
+                for($j = 0; $j < $len; $j++) {
+                    $arr[$j] = trim($arr[$j]);
+                    $arr[$j] = $this->readValue($arr[$j]);
+                }
+
+                $value = $arr;
+            } else {
+                $value = $this->readValue($value);
+            }
+
+            $config[$key] = $value;
+        }
+
+        return $config;
+    }
+
+    /**
+     * Convert php string into value
+     *
+     * @param string $value
+     * @return bool|string
+     */
+    protected function readValue($value) {
+        $removequotes_pattern = '/^(\'|")(.*)(?<!\\\\)\1$/s';
+        $unescape_pairs = array(
+            '\\\\' => '\\',
+            '\\\'' => '\'',
+            '\\"' => '"'
+        );
+
+        if($value == 'true') {
+            $value = true;
+        } elseif($value == 'false') {
+            $value = false;
+        } else {
+            // remove quotes from quoted strings & unescape escaped data
+            $value = preg_replace($removequotes_pattern, '$2', $value);
+            $value = strtr($value, $unescape_pairs);
+        }
+        return $value;
+    }
+
+}