#25: Updated the data migration framework to run all intermediate versions

app/DataMigration.php

@@ -4,5 +4,15 @@ namespace App;
 
 abstract class DataMigration
 {
+    /**
+     * Gets the version number this data migration applies to.
+     * @return string
+     */
+    abstract function getVersion();
+
+    /**
+     * Runs this data migration.
+     * @param string $currentVersion Current version being upgraded from.
+     */
     abstract function run($currentVersion);
 }

app/Http/Middleware/AppInstallation.php

@@ -2,7 +2,6 @@
 
 namespace App\Http\Middleware;
 
-use App\Configuration;
 use App\DataMigration;
 use App\Facade\UserConfig;
 use App\Helpers\MiscHelper;
@@ -99,16 +98,39 @@ class AppInstallation
             Artisan::call('migrate', ['--force' => true]);
             Artisan::call('db:seed', ['--force' => true]);
 
-            $className = sprintf('DataMigrationV%s', str_replace(['.', '-'], '_', $appVersionNumber));
-            if (class_exists($className))
+            // Run any data migrations relevant to the new version
+            $dataMigrationsFolder = join(DIRECTORY_SEPARATOR, [dirname(dirname(dirname(__DIR__))), 'database', 'data_migrations']);
+            $di = new \RecursiveDirectoryIterator($dataMigrationsFolder, \RecursiveDirectoryIterator::SKIP_DOTS);
+            $updateClasses = [];
+
+            // First load all data migration classes and examine the version number to decide if we need it or not
+            /** @var \SplFileInfo $fileInfo */
+            foreach ($di as $fileInfo)
             {
+                if (!$di->isFile() || $di->getExtension() != 'php')
+                {
+                    continue;
+                }
+
+                $className = substr($fileInfo->getFilename(), 0, strlen($fileInfo->getFilename()) - 4);
+
                 /** @var DataMigration $upgradeClass */
                 $upgradeClass = new $className;
+                if (version_compare($versionNumber->value, $upgradeClass->getVersion()) < 0)
+                {
+                    $updateClasses[] = $upgradeClass;
+                }
+            }
+
+            // Now run the migrations
+            foreach ($updateClasses as $upgradeClass)
+            {
                 $upgradeClass->run($versionNumber);
             }
-        }
 
-        $versionNumber->value = $appVersionNumber;
-        $versionNumber->save();
+            // Save the new version number
+            $versionNumber->value = $appVersionNumber;
+            $versionNumber->save();
+        }
     }
 }

config/app.php

@@ -2,7 +2,7 @@
 
 return [
     // Version number of Blue Twilight
-    'version' => '2.0.0-alpha.2',
+    'version' => '2.0.0-beta.1',
 
     /*
     |--------------------------------------------------------------------------

database/data_migrations/DataMigrationV2_0_0_alpha_1.php

@@ -5,6 +5,11 @@ use App\DataMigration;
 
 class DataMigrationV2_0_0_alpha_1 extends DataMigration
 {
+    public function getVersion()
+    {
+        return '2.0.0-alpha.1';
+    }
+
     public function run($currentVersion)
     {
         $this->storeAlbumUrlPaths();