Validate that columns referenced by converters are defined

Author: guvra

src/Database/Metadata/MetadataInterface.php

@@ -4,6 +4,7 @@
 
 namespace Smile\GdprDump\Database\Metadata;
 
+use RuntimeException;
 use Smile\GdprDump\Database\Metadata\Definition\Constraint\ForeignKey;
 
 interface MetadataInterface
@@ -15,6 +16,13 @@ interface MetadataInterface
      */
     public function getTableNames(): array;
 
+    /**
+     * Get the columns of the specified table.
+     *
+     * @throws RuntimeException
+     */
+    public function getColumnNames(string $tableName): array;
+
     /**
      * Get all foreign keys.
      * Each array element is an array that contains the foreign keys of a table.

src/Database/Metadata/MysqlMetadata.php

@@ -5,12 +5,14 @@
 namespace Smile\GdprDump\Database\Metadata;
 
 use Doctrine\DBAL\Connection;
+use RuntimeException;
 use Smile\GdprDump\Database\Metadata\Definition\Constraint\ForeignKey;
 
 class MysqlMetadata implements MetadataInterface
 {
     private string $schema;
     private ?array $tableNames = null;
+    private ?array $columnNames = null;
     private ?array $foreignKeys = null;
 
     public function __construct(private Connection $connection)
@@ -38,6 +40,31 @@ public function getTableNames(): array
         return $this->tableNames;
     }
 
+    /**
+     * @inheritdoc
+     */
+    public function getColumnNames(string $tableName): array
+    {
+        if ($this->columnNames === null) {
+            $query = 'SELECT TABLE_NAME, COLUMN_NAME '
+                . 'FROM INFORMATION_SCHEMA.COLUMNS '
+                . 'WHERE TABLE_SCHEMA=?'
+                . 'ORDER BY COLUMN_NAME ASC';
+
+            $statement = $this->connection->prepare($query);
+            $result = $statement->executeQuery([$this->schema]);
+
+            $this->columnNames = [];
+
+            while ($row = $result->fetchAssociative()) {
+                $this->columnNames[$row['TABLE_NAME']][] = $row['COLUMN_NAME'];
+            }
+        }
+
+        return $this->columnNames[$tableName]
+            ?? throw new RuntimeException(sprintf('The table "%s" is not defined.', $tableName));
+    }
+
     /**
      * @inheritdoc
      */

src/Dumper/Config/ConfigProcessor.php

@@ -6,6 +6,7 @@
 
 use Smile\GdprDump\Config\ConfigInterface;
 use Smile\GdprDump\Database\Metadata\MetadataInterface;
+use Smile\GdprDump\Dumper\Config\Validation\ValidationException;
 
 class ConfigProcessor
 {
@@ -47,7 +48,8 @@ private function processTableLists(ConfigInterface $config): void
     }
 
     /**
-     * Remove tables that don't exist from the "tables" parameter.
+     * Remove tables that don't exist from the "tables" parameter,
+     * and raise an exception if the remaining tables have converters that reference invalid columns.
      */
     private function processTablesData(ConfigInterface $config): void
     {
@@ -86,6 +88,10 @@ private function resolveTablesData(array $tablesData): array
             $matches = $this->findTablesByName((string) $tableName);
 
             foreach ($matches as $match) {
+                // Throw an exception if a converter refers to a column that does not exist
+                $this->validateTableColumns($tableName, $tableData);
+
+                // Merge table configuration
                 if (!array_key_exists($match, $resolved)) {
                     $resolved[$match] = [];
                 }
@@ -118,4 +124,25 @@ private function findTablesByName(string $pattern): array
 
         return $matches;
     }
+
+    /**
+     * Raise an exception if the table data contains a converter that references an undefined column.
+     */
+    private function validateTableColumns(string $tableName, array $tableData): void
+    {
+        if (!array_key_exists('converters', $tableData) || empty($tableData['converters'])) {
+            return;
+        }
+
+        $columns = $this->metadata->getColumnNames($tableName);
+
+        foreach ($tableData['converters'] as $columnName => $converterData) {
+            $disabled = $converterData['disabled'] ?? false;
+
+            if (!$disabled && !in_array($columnName, $columns)) {
+                $message = 'The table "%s" uses a converter on an undefined column "%s".';
+                throw new ValidationException(sprintf($message, $tableName, $columnName));
+            }
+        }
+    }
 }

tests/functional/Database/Metadata/MysqlMetadataTest.php

@@ -4,6 +4,7 @@
 
 namespace Smile\GdprDump\Tests\Functional\Database\Metadata;
 
+use RuntimeException;
 use Smile\GdprDump\Database\Metadata\MetadataInterface;
 use Smile\GdprDump\Database\Metadata\MysqlMetadata;
 use Smile\GdprDump\Tests\Functional\TestCase;
@@ -19,6 +20,24 @@ public function testTableNames(): void
         $this->assertEqualsCanonicalizing(['stores', 'customers', 'addresses', 'config'], $metadata->getTableNames());
     }
 
+    /**
+     * Test the "getColumnNames" method.
+     */
+    public function testColumnNames(): void
+    {
+        $columns = $this->getMetadata()->getColumnNames('stores');
+        $this->assertEqualsCanonicalizing(['code', 'store_id', 'parent_store_id'], $columns);
+    }
+
+    /**
+     * Assert that an exception is thrown when fetching the columns of an undefined table.
+     */
+    public function testErrorOnInvalidTableName(): void
+    {
+        $this->expectException(RuntimeException::class);
+        $this->getMetadata()->getColumnNames('undefined');
+    }
+
     /**
      * Test the "getForeignKeys" method.
      */