From fb7e7ff1647ad65545ac2682ef9c1b12074b7226 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20P=C5=82odowski?= <michal.plodowski@gmail.com>
Date: Tue, 31 May 2016 13:50:41 +0200
Subject: [PATCH] Command for changing configuration to env syntax

---
 modules/system/ServiceProvider.php    |   1 +
 modules/system/console/OctoberEnv.php | 265 ++++++++++++++++++++++++++
 2 files changed, 266 insertions(+)
 create mode 100644 modules/system/console/OctoberEnv.php

diff --git a/modules/system/ServiceProvider.php b/modules/system/ServiceProvider.php
index d1afcfdbe..63040b869 100644
--- a/modules/system/ServiceProvider.php
+++ b/modules/system/ServiceProvider.php
@@ -219,6 +219,7 @@ class ServiceProvider extends ModuleServiceProvider
         $this->registerConsoleCommand('october.util', 'System\Console\OctoberUtil');
         $this->registerConsoleCommand('october.mirror', 'System\Console\OctoberMirror');
         $this->registerConsoleCommand('october.fresh', 'System\Console\OctoberFresh');
+        $this->registerConsoleCommand('october.env', 'System\Console\OctoberEnv');
         $this->registerConsoleCommand('october.install', 'System\Console\OctoberInstall');
 
         $this->registerConsoleCommand('plugin.install', 'System\Console\PluginInstall');
diff --git a/modules/system/console/OctoberEnv.php b/modules/system/console/OctoberEnv.php
new file mode 100644
index 000000000..1a29f37dd
--- /dev/null
+++ b/modules/system/console/OctoberEnv.php
@@ -0,0 +1,265 @@
+<?php namespace System\Console;
+
+use Illuminate\Console\Command;
+
+class OctoberEnv extends Command
+{
+
+    /**
+     * The console command name.
+     */
+    protected $name = 'october:env';
+
+    /**
+     * The console command description.
+     */
+    protected $description = 'Creates .env file with default configuration values.';
+
+    /**
+     * Create a new command instance.
+     */
+    public function __construct()
+    {
+        parent::__construct();
+    }
+
+    /**
+     * Execute the console command.
+     */
+    public function fire()
+    {
+        if (file_exists('.env')) {
+            return $this->error('.env file already exists.');
+        }
+
+        $this->overwriteConfig();
+
+        $this->info('.env configuration file has been created.');
+    }
+
+    /**
+     * Overwrite config file
+     */
+    private function overwriteConfig()
+    {
+        foreach ($this->config() as $file => $keys) {
+            $content = $this->configToEnv($file, $keys);
+
+            $this->writeToConfigFile($file, $content);
+        }
+    }
+
+    /**
+     * Replace config values with env() syntax
+     *
+     * @param $file
+     * @param $keys
+     * @return string
+     */
+    private function configToEnv($file, $keys)
+    {
+        $content = $this->readConfigFile($file);
+
+        foreach ($keys as $envKey => $configKey) {
+            $pattern = $this->buildPattern($configKey);
+            $callback = $this->buildCallback($file, $envKey, $configKey);
+
+            $content = preg_replace_callback($pattern, $callback, $content);
+        }
+
+        $this->writeToEnv("\n");
+
+        return $content;
+    }
+
+    /**
+     * @param $configKey
+     * @return string
+     */
+    private function buildPattern($configKey)
+    {
+        return "/['\"]" . $configKey . "['\"]" . "\s*=>\s*[^,\[]+,/";
+    }
+
+    /**
+     * @param $file
+     * @param $envKey
+     * @param $configKey
+     * @return \Closure
+     */
+    private function buildCallback($file, $envKey, $configKey)
+    {
+        return function ($matches) use ($envKey, $configKey, $file) {
+
+            $value = $this->envValue($file, $configKey);
+
+            if ( ! $this->envKeyExists($envKey)) {
+                $envLine = sprintf("%s=%s\n", $envKey, $this->stripQuotes($value));
+                $this->writeToEnv($envLine);
+            }
+
+            return $this->isEnv($matches[0]) ? $matches[0] : "'$configKey' => env('$envKey', {$value}),";
+        };
+    }
+
+    /**
+     * @param $config
+     * @param $configKey
+     * @return string
+     */
+    private function envValue($config, $configKey)
+    {
+        $value = config("$config.$configKey");
+
+        if ($config == 'database') {
+            $value = $this->databaseConfigValue($configKey);
+        }
+
+        return $this->normalize($value);
+    }
+
+    /**
+     * @param $configKey
+     * @return string
+     */
+    private function databaseConfigValue($configKey)
+    {
+        $defaultConnection = config('database.default');
+
+        return $configKey == 'default'
+            ? $defaultConnection
+            : config("database.connections.$defaultConnection.$configKey");
+    }
+
+    /**
+     * @param $value
+     * @return string
+     */
+    private function normalize($value)
+    {
+        if (is_string($value)) {
+            return "'$value'";
+        } elseif (is_bool($value)) {
+            return $value ? 'true' : 'false';
+        } elseif (is_null($value)) {
+            return 'null';
+        }
+
+        return $value;
+    }
+
+    /**
+     * Strip single and double quotes
+     *
+     * @param $string
+     * @return string
+     */
+    private function stripQuotes($string)
+    {
+        return strtr($string, ['"' => '', "'" => '']);
+    }
+
+    /**
+     * @param $matches
+     * @return bool
+     */
+    private function isEnv($matches)
+    {
+        return strpos($matches, 'env') !== false;
+    }
+
+    /**
+     * Write content to .env file
+     *
+     * @param $content
+     */
+    private function writeToEnv($content)
+    {
+        file_put_contents('.env', $content, FILE_APPEND);
+    }
+
+    /**
+     * @return string
+     */
+    private function readEnvFile()
+    {
+        return file_exists('.env') ? file_get_contents('.env') : '';
+    }
+
+    /**
+     * Write content to config file
+     *
+     * @param $file
+     * @param $content
+     */
+    private function writeToConfigFile($file, $content)
+    {
+        file_put_contents(config_path($file . '.php'), $content);
+    }
+
+    /**
+     * @param $file
+     * @return string
+     */
+    private function readConfigFile($file)
+    {
+        return file_get_contents(config_path($file . '.php'));
+    }
+
+    /**
+     * @param $key
+     * @return bool
+     */
+    private function envKeyExists($key)
+    {
+        return strpos($this->readEnvFile(), $key) !== false;
+    }
+
+    /**
+     * Configuration array for search and replace
+     *
+     * @return array
+     */
+    private function config()
+    {
+        return [
+            'app' => [
+                'APP_DEBUG' => 'debug',
+                'APP_URL' => 'url',
+                'APP_KEY' => 'key',
+            ],
+            'database' => [
+                'DB_CONNECTION' => 'default',
+                'DB_HOST' => 'host',
+                'DB_PORT' => 'port',
+                'DB_DATABASE' => 'database',
+                'DB_USERNAME' => 'username',
+                'DB_PASSWORD' => 'password',
+            ],
+            'cache' => [
+                'CACHE_DRIVER' => 'default',
+            ],
+            'session' => [
+                'SESSION_DRIVER' => 'driver',
+            ],
+            'queue' => [
+                'QUEUE_DRIVER' => 'default',
+            ],
+            'mail' => [
+                'MAIL_DRIVER' => 'driver',
+                'MAIL_HOST' => 'host',
+                'MAIL_PORT' => 'port',
+                'MAIL_USERNAME' => 'username',
+                'MAIL_PASSWORD' => 'password',
+                'MAIL_ENCRYPTION' => 'encryption',
+            ],
+            'cms' => [
+                'ROUTES_CACHE' => 'enableRoutesCache',
+                'ASSET_CACHE' => 'enableAssetCache',
+                'LINK_POLICY' => 'linkPolicy',
+                'ENABLE_CSRF' => 'enableCsrfProtection',
+            ],
+        ];
+    }
+
+}