1 files changed, 96 insertions, 0 deletions
diff --git a/classes/backends/SchemaDb.php b/classes/backends/SchemaDb.php
new file mode 100644
index 0000000..db9ca30
--- /dev/null
+++ b/classes/backends/SchemaDb.php
@@ -0,0 +1,96 @@
+<?php
+
+/**
+ * SchemaDb class with standard database procedures and
+ * configuration.
+ */
+class SchemaDb {
+  /**
+   * Return the required database config.
+   *
+   * @return
+   *   Array with required config.
+   */
+  static function required() {
+    $schema = array(
+      'db'             => array(
+        'name'         => 'dbname',
+      ),
+      'fields'         => array(
+      ),
+    );
+
+    return $schema;
+  }
+
+  /**
+   * Return the optional database config.
+   *
+   * @return
+   *   Array with optional config.
+   */  
+  public function optional() {
+    $schema   = array(
+      'db'             => array(
+        'charset'      => 'charset',
+      ),
+    );
+
+    return $schema;
+  }
+
+  /**
+   * Return an example database schema.
+   *
+   * @see IsisDb::example()
+   */    
+  public function example() {
+    $required = SchemaDb::required();
+    $optional = SchemaDb::optional();
+    $schema   = array(
+      'db'             => array(
+        'charset'      => 'charset',
+      ),
+      'fields'         => array(
+        1              => array(
+          'name'       => 'field_name',
+          'size'       => 1000,
+          'format'     => 'numeric',
+          'repeat'     => TRUE,
+          'subfields'  => array(
+            'a'        => 'test',
+            'b'        => 'test2',
+          ),
+        ),
+      ),
+    );
+
+    return array_merge_recursive($required, $optional, $schema);
+  }
+
+  /**
+   * Recursively check for required fields in a database schema.
+   *
+   * @see IsisDb::check()
+   */
+  static function check($schema, $section = NULL) {
+    if ($section === NULL) {
+      $section = SchemaDb::required();
+    }
+
+    foreach ($section as $key => $value) {
+      if (!isset($schema[$key])) {
+        throw new Exception('Undefined required parameter '. $key .' on database configuration.');
+        return FALSE;
+      }
+
+      if (is_array($value)) {
+        if (SchemaDb::check($schema[$key], $section[$key]) == FALSE) {
+          return FALSE;
+        }
+      }
+    }
+
+    return $schema;
+  }
+}