<?php
/**
 * @file
 * Installation and upgrade code for Zavod supplier.
 */

/**
 * Implements hook_schema().
 */
function zavod_supplier_schema() {
  $schema = array();

  $schema['zavod_suppliers'] = array(
    'description' => 'Stock suppliers for Zavod.',
    'fields' => array(
      'supplier_id' => array(
        'description' => 'The primary identifier for a supplier.',
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'title' => array(
        'description' => 'The title of this supplier, always treated as non-markup plain text.',
        'type' => 'text',
        'not null' => TRUE,
      ),
    ),
    'primary key' => array('supplier_id'),
  );

  $schema['zavod_supply_orders'] = array(
    'description' => 'Supply orders for Zavod.',
    'fields' => array(
      'order_id' => array(
        'description' => 'The primary identifier for a supply order.',
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'supplier_id' => array(
        'description' => '{zavod_suppliers}.supplier_id of the supplier that the order is made to.',
        'type' => 'int',
        'not null' => TRUE,
        'unsigned' => TRUE,
      ),
      'title' => array(
        'description' => 'The title of this order, always treated as non-markup plain text.',
        'type' => 'text',
        'not null' => TRUE,
      ),
    ),
    'foreign keys' => array(
      'zavod_suppliers' => array(
        'table' => 'zavod_suppliers',
        'columns' => array('supplier_id' => 'supplier_id'),
      ),
    ),
    'primary key' => array('order_id'),
  );

  return $schema;
}

/**
 * Implements hook_install().
 */
function zavod_supplier_install() {
  // Make real foreign keys.
  db_query('
    ALTER TABLE {zavod_supply_orders}
    ADD CONSTRAINT {zavod_suppliers}
    FOREIGN KEY (supplier_id) REFERENCES {zavod_suppliers} (supplier_id)
  ');
}

/**
 * Implements hook_uninstall().
 */
function zavod_supplier_uninstall() {
  // Make real foreign keys.
  db_query('
    ALTER TABLE {zavod_supply_orders}
    DROP CONSTRAINT IF EXISTS {zavod_suppliers}
  ');
}