diff core/modules/migrate_drupal/src/MigrationConfigurationTrait.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/modules/migrate_drupal/src/MigrationConfigurationTrait.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,170 @@
+<?php
+
+namespace Drupal\migrate_drupal;
+
+use Drupal\Core\Database\Connection;
+use Drupal\Core\Database\Database;
+use Drupal\migrate\Exception\RequirementsException;
+use Drupal\migrate\Plugin\RequirementsInterface;
+
+/**
+ * Configures the appropriate migrations for a given source Drupal database.
+ */
+trait MigrationConfigurationTrait {
+
+  /**
+   * Gets the database connection for the source Drupal database.
+   *
+   * @param array $database
+   *   Database array representing the source Drupal database.
+   *
+   * @return \Drupal\Core\Database\Connection
+   *   The database connection for the source Drupal database.
+   */
+  protected function getConnection(array $database) {
+    // Set up the connection.
+    Database::addConnectionInfo('upgrade', 'default', $database);
+    $connection = Database::getConnection('default', 'upgrade');
+    return $connection;
+  }
+
+  /**
+   * Gets the system data from the system table of the source Drupal database.
+   *
+   * @param \Drupal\Core\Database\Connection $connection
+   *   Database connection to the source Drupal database.
+   *
+   * @return array
+   *   The system data from the system table of the source Drupal database.
+   */
+  protected function getSystemData(Connection $connection) {
+    $system_data = [];
+    try {
+      $results = $connection->select('system', 's', [
+        'fetch' => \PDO::FETCH_ASSOC,
+      ])
+        ->fields('s')
+        ->execute();
+      foreach ($results as $result) {
+        $system_data[$result['type']][$result['name']] = $result;
+      }
+    }
+    catch (\Exception $e) {
+      // The table might not exist for example in tests.
+    }
+    return $system_data;
+  }
+
+  /**
+   * Creates the necessary state entries for SqlBase::getDatabase() to work.
+   *
+   * The state entities created here have to exist before migration plugin
+   * instances are created so that derivers such as
+   * \Drupal\taxonomy\Plugin\migrate\D6TermNodeDeriver can access the source
+   * database.
+   *
+   * @param array $database
+   *   The source database settings.
+   * @param string $drupal_version
+   *   The Drupal version.
+   *
+   * @see \Drupal\migrate\Plugin\migrate\source\SqlBase::getDatabase()
+   */
+  protected function createDatabaseStateSettings(array $database, $drupal_version) {
+    $database_state['key'] = 'upgrade';
+    $database_state['database'] = $database;
+    $database_state_key = 'migrate_drupal_' . $drupal_version;
+    \Drupal::state()->set($database_state_key, $database_state);
+    \Drupal::state()->set('migrate.fallback_state_key', $database_state_key);
+  }
+
+  /**
+   * Gets the migrations for import.
+   *
+   * @param string $database_state_key
+   *   The state key.
+   * @param int $drupal_version
+   *   The version of Drupal we're getting the migrations for.
+   *
+   * @return \Drupal\migrate\Plugin\MigrationInterface[]
+   *   The migrations for import.
+   */
+  protected function getMigrations($database_state_key, $drupal_version) {
+    $version_tag = 'Drupal ' . $drupal_version;
+    $plugin_manager = \Drupal::service('plugin.manager.migration');
+    /** @var \Drupal\migrate\Plugin\Migration[] $all_migrations */
+    $all_migrations = $plugin_manager->createInstancesByTag($version_tag);
+    $migrations = [];
+    foreach ($all_migrations as $migration) {
+      try {
+        // @todo https://drupal.org/node/2681867 We should be able to validate
+        //   the entire migration at this point.
+        $source_plugin = $migration->getSourcePlugin();
+        if ($source_plugin instanceof RequirementsInterface) {
+          $source_plugin->checkRequirements();
+        }
+        $destination_plugin = $migration->getDestinationPlugin();
+        if ($destination_plugin instanceof RequirementsInterface) {
+          $destination_plugin->checkRequirements();
+        }
+        $migrations[] = $migration;
+      }
+      catch (RequirementsException $e) {
+        // Migrations which are not applicable given the source and destination
+        // site configurations (e.g., what modules are enabled) will be silently
+        // ignored.
+      }
+    }
+
+    return $migrations;
+  }
+
+  /**
+   * Determines what version of Drupal the source database contains.
+   *
+   * @param \Drupal\Core\Database\Connection $connection
+   *   The database connection object.
+   *
+   * @return int|false
+   *   An integer representing the major branch of Drupal core (e.g. '6' for
+   *   Drupal 6.x), or FALSE if no valid version is matched.
+   */
+  protected function getLegacyDrupalVersion(Connection $connection) {
+    // Don't assume because a table of that name exists, that it has the columns
+    // we're querying. Catch exceptions and report that the source database is
+    // not Drupal.
+    // Drupal 5/6/7 can be detected by the schema_version in the system table.
+    if ($connection->schema()->tableExists('system')) {
+      try {
+        $version_string = $connection
+          ->query('SELECT schema_version FROM {system} WHERE name = :module', [':module' => 'system'])
+          ->fetchField();
+        if ($version_string && $version_string[0] == '1') {
+          if ((int) $version_string >= 1000) {
+            $version_string = '5';
+          }
+          else {
+            $version_string = FALSE;
+          }
+        }
+      }
+      catch (\PDOException $e) {
+        $version_string = FALSE;
+      }
+    }
+    // For Drupal 8 (and we're predicting beyond) the schema version is in the
+    // key_value store.
+    elseif ($connection->schema()->tableExists('key_value')) {
+      $result = $connection
+        ->query("SELECT value FROM {key_value} WHERE collection = :system_schema  and name = :module", [':system_schema' => 'system.schema', ':module' => 'system'])
+        ->fetchField();
+      $version_string = unserialize($result);
+    }
+    else {
+      $version_string = FALSE;
+    }
+
+    return $version_string ? substr($version_string, 0, 1) : FALSE;
+  }
+
+}