From f9c56d7cb1d1a3fe881e7ba8cbd00bb42d7b91cb Mon Sep 17 00:00:00 2001
From: Alejandro Celaya <alejandro@alejandrocelaya.com>
Date: Mon, 3 Jul 2017 13:43:46 +0200
Subject: [PATCH] Added process to import previous configuration when updating
 shlink

---
 .../Install/AbstractInstallCommand.php        | 39 ++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/module/CLI/src/Command/Install/AbstractInstallCommand.php b/module/CLI/src/Command/Install/AbstractInstallCommand.php
index 5c271231..f6341627 100644
--- a/module/CLI/src/Command/Install/AbstractInstallCommand.php
+++ b/module/CLI/src/Command/Install/AbstractInstallCommand.php
@@ -11,6 +11,7 @@ use Symfony\Component\Console\Helper\QuestionHelper;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Question\ChoiceQuestion;
+use Symfony\Component\Console\Question\ConfirmationQuestion;
 use Symfony\Component\Console\Question\Question;
 use Zend\Config\Writer\WriterInterface;
 
@@ -24,6 +25,7 @@ abstract class AbstractInstallCommand extends Command
         'SQLite' => 'pdo_sqlite',
     ];
     const SUPPORTED_LANGUAGES = ['en', 'es'];
+    const GENERATED_CONFIG_PATH = 'config/params/generated_config.php';
 
     /**
      * @var InputInterface
@@ -86,9 +88,15 @@ abstract class AbstractInstallCommand extends Command
                     ' <error>Failed!</error> You will have to manually delete the data/cache/app_config.php file to get'
                     . ' new config applied.'
                 );
+                return;
             }
         }
 
+        // If running update command, ask the user to import previous config
+        if ($this->isUpdate()) {
+            $this->importConfig();
+        }
+
         // Ask for custom config params
         $params['DATABASE'] = $this->askDatabase();
         $params['URL_SHORTENER'] = $this->askUrlShortener();
@@ -97,7 +105,7 @@ abstract class AbstractInstallCommand extends Command
 
         // Generate config params files
         $config = $this->buildAppConfig($params);
-        $this->configWriter->toFile('config/params/generated_config.php', $config, false);
+        $this->configWriter->toFile(self::GENERATED_CONFIG_PATH, $config, false);
         $output->writeln(['<info>Custom configuration properly generated!</info>', '']);
 
         // If current command is not update, generate database
@@ -124,6 +132,35 @@ abstract class AbstractInstallCommand extends Command
         }
     }
 
+    protected function importConfig()
+    {
+        // Ask the user if he/she wants to import an older configuration
+        $importConfig = $this->questionHelper->ask($this->input, $this->output, new ConfirmationQuestion(
+            '<question>Do you want to import previous configuration? (Y/n):</question> '
+        ));
+        if (! $importConfig) {
+            return;
+        }
+
+        // Ask the user for the older shlink path
+        $keepAsking = true;
+        do {
+            $installationPath = $this->ask('Previous shlink installation path from which to import config');
+            $configFile = $installationPath . '/' . self::GENERATED_CONFIG_PATH;
+            $configExists = file_exists($configFile);
+
+            if (! $configExists) {
+                $keepAsking = $this->questionHelper->ask($this->input, $this->output, new ConfirmationQuestion(
+                    'Provided path does not seem to be a valid shlink root path. '
+                    . '<question>Do you want to try another path? (Y/n):</question> '
+                ));
+            }
+        } while (! $configExists && $keepAsking);
+
+        // Read the config file
+        $previousConfig = include $configFile;
+    }
+
     protected function askDatabase()
     {
         $params = [];