merci_line_item_handler_field_edit_quantity.inc in MERCI (Manage Equipment Reservations, Checkout and Inventory) 7.3

Field handler to present a form field to change quantity of a line item. It's a dummy handler, most part of the implementation is done via post render hook.

File

merci_line_item/includes/views/handlers/merci_line_item_handler_field_edit_quantity.inc

<?php

/**
 * @file
 * Field handler to present a form field to change quantity of a line item. It's
 * a dummy handler, most part of the implementation is done via post render
 * hook.
 */

/**
 * Field handler to present a field to change quantity of a line item.
 */
class merci_line_item_handler_field_edit_quantity extends views_handler_field {
  function construct() {
    parent::construct();
    $this->additional_fields['line_item_id'] = 'line_item_id';
    $this->additional_fields['quantity'] = 'quantity';

    // Set real_field in order to make it generate a field_alias.
    $this->real_field = 'quantity';
  }
  function render($values) {
    return '<!--form-item-' . $this->options['id'] . '--' . $this->view->row_index . '-->';
  }

  /**
   * Returns the form which replaces the placeholder from render().
   */
  function views_form(&$form, &$form_state) {

    // The view is empty, abort.
    if (empty($this->view->result)) {
      return;
    }
    $form[$this->options['id']] = array(
      '#tree' => TRUE,
    );

    // At this point, the query has already been run, so we can access the results
    // in order to get the base key value (for example, nid for nodes).
    foreach ($this->view->result as $row_id => $row) {
      $line_item_id = $this
        ->get_value($row, 'line_item_id');
      $quantity = $this
        ->get_value($row, 'quantity');
      $form[$this->options['id']][$row_id] = array(
        '#type' => 'textfield',
        '#datatype' => 'integer',
        '#default_value' => round($quantity),
        '#size' => 4,
        '#maxlength' => max(4, strlen($quantity)),
        '#line_item_id' => $line_item_id,
        '#attributes' => array(
          'title' => $this->options['label'],
        ),
      );
    }
  }
  function views_form_validate($form, &$form_state) {
    $field_name = $this->options['id'];
    foreach (element_children($form[$field_name]) as $row_id) {

      // Ensure the quantity is actually a numeric value.
      if (!is_numeric($form_state['values'][$field_name][$row_id]) || $form_state['values'][$field_name][$row_id] < 0) {
        form_set_error($field_name . '][' . $row_id, t('You must specify a positive number for the quantity'));
      }

      // If the custom data type attribute of the quantity element is integer,
      // ensure we only accept whole number values.
      if ($form[$field_name][$row_id]['#datatype'] == 'integer' && (int) $form_state['values'][$field_name][$row_id] != $form_state['values'][$field_name][$row_id]) {
        form_set_error($field_name . '][' . $row_id, t('You must specify a whole number for the quantity.'));
      }
    }
  }
  function views_form_submit($form, &$form_state) {
    $field_name = $this->options['id'];
    $deleted_line_items = array();
    $updated_line_items = array();
    foreach (element_children($form[$field_name]) as $row_id) {
      $line_item_id = $form[$field_name][$row_id]['#line_item_id'];

      // If the line item hasn't been deleted...
      if ($line_item = merci_line_item_load($line_item_id)) {
        $form_quantity = $form_state['values'][$field_name][$row_id];

        // If the quantity on the form is different...
        if ($form_quantity != $line_item->quantity) {

          // If the quantity specified is 0, flag the line item for deletion.
          if ($form_quantity == 0) {
            $deleted_line_items[] = $line_item_id;
          }
          else {

            // Otherwise queue the line item quantity update.
            $updated_line_items[$line_item_id] = $form_quantity;
          }
        }
      }
    }

    // Process the deletes first.
    foreach ($deleted_line_items as $line_item_id) {
      $order = commerce_order_load($form_state['order']->order_id);
      commerce_cart_order_product_line_item_delete($order, $line_item_id);
    }

    // Then process the quantity updates.
    foreach ($updated_line_items as $line_item_id => $quantity) {

      // Load the line item and update it.
      $line_item = merci_line_item_load($line_item_id);
      $line_item->quantity = $quantity;
      merci_line_item_save($line_item);
      entity_get_controller('merci_line_item')
        ->resetCache(array(
        $line_item->line_item_id,
      ));
    }
  }

}

Classes

Name	Description
merci_line_item_handler_field_edit_quantity	Field handler to present a field to change quantity of a line item.