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vendor/vlucas/phpdotenv/src/Regex/Regex.php

@@ -0,0 +1,122 @@
+<?php
+
+namespace Dotenv\Regex;
+
+use Dotenv\Result\Error;
+use Dotenv\Result\Result;
+use Dotenv\Result\Success;
+use PhpOption\Option;
+
+class Regex
+{
+    /**
+     * Perform a preg match, wrapping up the result.
+     *
+     * @param string $pattern
+     * @param string $subject
+     *
+     * @return \Dotenv\Result\Result<int,string>
+     */
+    public static function match($pattern, $subject)
+    {
+        return self::pregAndWrap(function ($subject) use ($pattern) {
+            return (int) @preg_match($pattern, $subject);
+        }, $subject);
+    }
+
+    /**
+     * Perform a preg replace, wrapping up the result.
+     *
+     * @param string   $pattern
+     * @param string   $replacement
+     * @param string   $subject
+     * @param int|null $limit
+     *
+     * @return \Dotenv\Result\Result<string,string>
+     */
+    public static function replace($pattern, $replacement, $subject, $limit = null)
+    {
+        return self::pregAndWrap(function ($subject) use ($pattern, $replacement, $limit) {
+            return (string) @preg_replace($pattern, $replacement, $subject, $limit === null ? -1 : $limit);
+        }, $subject);
+    }
+
+    /**
+     * Perform a preg replace callback, wrapping up the result.
+     *
+     * @param string   $pattern
+     * @param callable $callback
+     * @param string   $subject
+     * @param int|null $limit
+     *
+     * @return \Dotenv\Result\Result<string,string>
+     */
+    public static function replaceCallback($pattern, callable $callback, $subject, $limit = null)
+    {
+        return self::pregAndWrap(function ($subject) use ($pattern, $callback, $limit) {
+            return (string) @preg_replace_callback($pattern, $callback, $subject, $limit === null ? -1 : $limit);
+        }, $subject);
+    }
+
+    /**
+     * Perform a preg split, wrapping up the result.
+     *
+     * @param string $pattern
+     * @param string $subject
+     *
+     * @return \Dotenv\Result\Result<string[],string>
+     */
+    public static function split($pattern, $subject)
+    {
+        return self::pregAndWrap(function ($subject) use ($pattern) {
+            return (array) @preg_split($pattern, $subject);
+        }, $subject);
+    }
+
+    /**
+     * Perform a preg operation, wrapping up the result.
+     *
+     * @template V
+     *
+     * @param callable(string):V $operation
+     * @param string             $subject
+     *
+     * @return \Dotenv\Result\Result<V,string>
+     */
+    private static function pregAndWrap(callable $operation, $subject)
+    {
+        $result = $operation($subject);
+
+        if (($e = preg_last_error()) !== PREG_NO_ERROR) {
+            return Error::create(self::lookupError($e));
+        }
+
+        return Success::create($result);
+    }
+
+    /**
+     * Lookup the preg error code.
+     *
+     * @param int $code
+     *
+     * @return string
+     */
+    private static function lookupError($code)
+    {
+        return Option::fromValue(get_defined_constants(true))
+            ->filter(function (array $consts) {
+                return isset($consts['pcre']) && defined('ARRAY_FILTER_USE_KEY');
+            })
+            ->map(function (array $consts) {
+                return array_filter($consts['pcre'], function ($msg) {
+                    return substr($msg, -6) === '_ERROR';
+                }, ARRAY_FILTER_USE_KEY);
+            })
+            ->flatMap(function (array $errors) use ($code) {
+                return Option::fromValue(
+                    array_search($code, $errors, true)
+                );
+            })
+            ->getOrElse('PREG_ERROR');
+    }
+}