From 8839ef7ad03dfe327ba5d54cf05260d59096edf1 Mon Sep 17 00:00:00 2001
From: Robin Wieschendorf <mail@robinwieschendorf.de>
Date: Mon, 19 Jun 2023 14:23:48 +0200
Subject: [PATCH] feat: add and use new ConfigBuilder

---
 src/Classes/Config.php        | 37 +-------------
 src/Classes/ConfigBuilder.php | 91 +++++++++++++++++++++++++++++++++++
 2 files changed, 93 insertions(+), 35 deletions(-)
 create mode 100644 src/Classes/ConfigBuilder.php

diff --git a/src/Classes/Config.php b/src/Classes/Config.php
index effb1575..3af4456b 100644
--- a/src/Classes/Config.php
+++ b/src/Classes/Config.php
@@ -74,41 +74,8 @@ public static function writeConfiguration(array $options): void
         $configOld = file_get_contents($configPath);
         $configNew = '';
 
-        foreach ($options as $key => $lineNewValue) {
-            $matches = [];
-
-            /**
-             * Look for line in config which matches:
-             * '$key' => 'foobar' (i. e.: 'username' => 'root')
-             *
-             * Look for $lineNewValue in found line and replace it:
-             * '$key' => 'foobar' becomes '$key' => '$lineNewValue'
-             */
-            $regex = '/(\'' . $key . '\')[ ]*=>[ ]*(\'.*\')/';
-
-            preg_match($regex, $configOld, $matches);
-
-            switch (count($matches)) {
-                case 3:
-                    $lineOld = $matches[0];
-                    $lineOldValue = $matches[2];
-                    $lineNewValue = '\'' . $lineNewValue . '\'';
-                    $lineNew = str_replace($lineOldValue, $lineNewValue, $lineOld);
-
-                    $configNew = str_replace($lineOld, $lineNew, $configOld);
-                    $configOld = $configNew;
-                    break;
-
-                case 0:
-                    /**
-                     * To do: add option if it doesn't exist
-                     * instead of showing an error.
-                     */
-                    $configNew = $configOld;
-                    throw new \RuntimeException('Cannot write option. Option "' . $key . '" does not not exist in ' . $configPath . '.');
-                    break;
-            }
-        }
+        $configBuilder = new ConfigBuilder();
+        $configNew = $configBuilder->update($configOld, $options);
 
         file_put_contents($configPath, $configNew);
 
diff --git a/src/Classes/ConfigBuilder.php b/src/Classes/ConfigBuilder.php
new file mode 100644
index 00000000..dbd765f9
--- /dev/null
+++ b/src/Classes/ConfigBuilder.php
@@ -0,0 +1,91 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of MMLC - ModifiedModuleLoaderClient.
+ *
+ * (c) Robin Wieschendorf <mail@robinwieschendorf.de>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace RobinTheHood\ModifiedModuleLoaderClient;
+
+class ConfigBuilder
+{
+    public function update(string $configString, array $options)
+    {
+        $newConfigString = $configString;
+        foreach ($options as $key => $value) {
+            $newConfigString = $this->updateOption($newConfigString, $key, $value);
+        }
+        return $newConfigString;
+    }
+
+    private function updateOption(string $configString, string $key, $value): string
+    {
+        if ($this->hasEntry($configString, $key)) {
+            return $this->replaceEntry($configString, $key, $value);
+        } else {
+            return $this->addEntry($configString, $key, $value);
+        }
+    }
+
+    private function replaceEntry(string $configString, string $key, $value): string
+    {
+        /**
+         * Look for line which matches:
+         * '$key' => 'foobar' (i. e.: 'username' => 'root')
+         */
+        $regex = "/^[ |\t]*'$key'\s*=>\s*'.*',*/m";
+        $newLine = "    '$key' => '$value',";
+        return preg_replace($regex, $newLine, $configString);
+    }
+
+    private function addEntry(string $configString, string $key, $value): string
+    {
+        $lastEntry = $this->getLastEntry($configString);
+        $newEntry = "    '$key' => '$value',";
+
+        $lastEntryAndNewEntry = $this->addCommaIfNeeded($lastEntry) . "\n" .  $newEntry;
+
+        return str_replace($lastEntry, $lastEntryAndNewEntry, $configString);
+    }
+
+    private function hasEntry(string $configString, string $key): bool
+    {
+        /**
+         * Look for line which matches:
+         * '$key' => 'foobar' (i. e.: 'username' => 'root')
+         */
+        $regex = "/^[ |\t]*'$key'\s*=>\s*'.*',*/m";
+        preg_match($regex, $configString, $matches);
+
+        if (count($matches) === 1) {
+            return true;
+        }
+
+        return false;
+    }
+
+    private function getLastEntry(string $configString): string
+    {
+        /**
+         * Look for line which matches:
+         * 'xxx' => 'xxx'
+         */
+        $regex = "/^[ |\t]*'.*'\s*=>\s*'.*',*/m";
+        preg_match_all($regex, $configString, $matches);
+        return end($matches[0]);
+    }
+
+    private function addCommaIfNeeded(string $string): string
+    {
+        if (substr($string, -1) !== ',') {
+            $string .= ',';
+        }
+        return $string;
+    }
+}