<?php
// $Id: ca_taxonomy.module,v 1.2 2009/04/17 01:42:20 mikeyp Exp $ 

/**
 * @file
 * Main module file for ca_taxonomy module.
 */


/**
 * Implementation of hook_ca_condition().
 */
function ca_taxonomy_ca_condition() {
  $conditions = array();
  $args = array(
    'order' => array(
      '#entity' => 'uc_order',
      '#title' => t('Order'),
    ),
  );

  $conditions['node_taxonomy_comparison'] = array(
    '#title' => t('Compare an order\'s taxonomy value'),
    '#description' => t('Returns TRUE if one of the order\'s products has the taxonomy term specified below.'),
    '#category' => t('Order: Product'),
    '#callback' => 'ca_taxonomy_condition_node_taxonomy_comparison',
    '#arguments' => $args,
  );

  return $conditions;
}

/**
 * Configuration form for the node_taxonomy condition.
 */
function ca_taxonomy_condition_node_taxonomy_comparison_form($form_state, $settings = array()) {
  $form = array();

  $form['term'] = array(
    '#type' => 'select',
    '#title' => t('Term'),
    '#options' => taxonomy_form_all(),
    '#description' => t('Select a term to compare to the node\'s terms. Keep in mind that the selected product node type must have the selected vocabulary enabled.'),
    '#default_value' => $settings['term'],
  );
  return $form;
}

/**
 * Verify if the current order has products/nodes which contain the requested
 * term.
 */
function ca_taxonomy_condition_node_taxonomy_comparison($order, $settings) {
  // Loop over the products.
  foreach ($order->products as $product) {
    // Loop over the terms.
    foreach ($product->taxonomy as $term) {
      // If the term matches, we're good to go.
      if ($term->tid == $settings['term']) {
        return TRUE;
      }
    }
  }
  // If we get this far then there's no match.
  return FALSE;
}