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<?php |
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namespace Backpack\CRUD\app\Library\Database; |
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use Illuminate\Support\Facades\DB; |
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use Illuminate\Support\LazyCollection; |
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final class DatabaseSchema |
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{ |
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private static $schema; |
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/** |
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* Return the schema for the table. |
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* |
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* @param string $connection |
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* @param string $table |
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*/ |
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public static function getForTable(string $connection, string $table) |
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{ |
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self::generateDatabaseSchema($connection, $table); |
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return self::$schema[$connection][$table] ?? null; |
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} |
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/** |
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* Generates and store the database schema. |
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* |
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* @param string $connection |
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* @param string $table |
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* @return void |
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*/ |
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private static function generateDatabaseSchema(string $connection, string $table) |
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{ |
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if (! isset(self::$schema[$connection]) || !isset(self::$schema[$connection][$table])) { |
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self::$schema[$connection] = self::mapTables($connection); |
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} |
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} |
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/** |
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* Map the tables from raw db values into an usable array. |
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* |
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* @param string $connection |
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* @return array |
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*/ |
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private static function mapTables(string $connection) |
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{ |
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return LazyCollection::make(self::getCreateSchema($connection)->getTables())->mapWithKeys(function ($table, $key) use ($connection) { |
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$tableName = is_array($table) ? $table['name'] : $table->getName(); |
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if(self::$schema[$connection][$tableName] ?? false) { |
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return [$tableName => self::$schema[$connection][$tableName]]; |
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} |
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if (is_array($table)) { |
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$table = new Table(self::mapTableColumns($connection, $tableName)); |
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} |
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return [$tableName => $table]; |
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})->toArray(); |
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} |
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private static function getIndexColumnNames($connection, $table) |
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{ |
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$schemaManager = self::getSchemaManager($connection); |
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$indexes = method_exists($schemaManager, 'listTableIndexes') ? $schemaManager->listTableIndexes($table) : $schemaManager->getIndexes($table); |
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$indexes = array_map(function ($index) { |
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return is_array($index) ? $index['columns'] : $index->getColumns(); |
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}, $indexes); |
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$indexes = \Illuminate\Support\Arr::flatten($indexes); |
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return array_unique($indexes); |
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} |
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private static function mapTableColumns($connection, $table) |
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{ |
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$indexedColumns = self::getIndexColumnNames($connection, $table); |
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return LazyCollection::make(self::getSchemaManager($connection)->getColumns($table))->mapWithKeys(function ($column, $key) use ($indexedColumns) { |
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$column['index'] = array_key_exists($column['name'], $indexedColumns) ? true : false; |
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return [$column['name'] => $column]; |
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})->toArray(); |
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} |
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private static function getCreateSchema(string $connection) |
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{ |
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$schemaManager = self::getSchemaManager($connection); |
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return method_exists($schemaManager, 'createSchema') ? $schemaManager->createSchema() : $schemaManager; |
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} |
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private static function getSchemaManager(string $connection) |
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{ |
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$connection = DB::connection($connection); |
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return method_exists($connection, 'getDoctrineSchemaManager') ? $connection->getDoctrineSchemaManager() : $connection->getSchemaBuilder(); |
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} |
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public function listTableColumnsNames(string $connection, string $table) |
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{ |
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$table = self::getForTable($connection, $table); |
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return array_keys($table->getColumns()); |
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} |
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public function listTableIndexes(string $connection, string $table) |
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{ |
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return self::getIndexColumnNames($connection, $table); |
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} |
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} |
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Laravel-Backpack /
CRUD
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