<?php

// Permission that allows to access the content architecture.
define('GRAPHMIND_FUTURES_WHEEL__PERM__ACCESS_FUTURES_WHEEL', 'access futures wheel');


/**
 * Implementation of hook_perm().
 * @return array
 */
function graphmind_futures_wheel_perm() {
  return array(
    GRAPHMIND_FUTURES_WHEEL__PERM__ACCESS_FUTURES_WHEEL,
  );
}


/**
 * Implementation of hook_graphmind_flashvars_alter().
 *
 * @param array &$flashvars
 * @param int $nid
 */
function graphmind_futures_wheel_graphmind_flashvars_alter(&$flashvars, $nid) {
  if (graphmind_futures_wheel_is_node_futures_wheel($nid)) {
    $flashvars['workflow'] = 'futures_wheel';
  }
}


/**
 * Implementation of hook_form_FORM_ID_alter().
 * Add futures wheel plugin settings to the node form.
 *
 * @param array $form
 * @param array $form_status
 */
function graphmind_futures_wheel_form_graphmind_node_form_alter(&$form, &$form_state) {
  $futures_wheel_plugin_is_default = graphmind_futures_wheel_is_node_futures_wheel($form['nid']['#value']);
  if ($futures_wheel_plugin_is_default === NULL) {
    $futures_wheel_plugin_is_default = variable_get('graphmind_futures_wheel_plugin_is_default', 0);
  }
  $form['graphmind']['graphmind_futures_wheel'] = array(
    '#type' => 'checkbox',
    '#title' => t('Futures wheel'),
    '#description' => t('Use futures wheel to visualize the map.'),
    '#default_value' => $futures_wheel_plugin_is_default,
  );
}


/**
 * Implementation of hook_nodeapi().
 */
function graphmind_futures_wheel_nodeapi(&$node, $op, $a3 = NULL, $a4 = NULL) {
	switch ($op) {
		case 'insert' :
			if ($node->graphmind_futures_wheel == 1) {
				graphmind_futures_wheel_add_node($node->nid);
			}
			break;
		case 'update':
      if (isset($node->graphmind_futures_wheel)) {
        if ($node->graphmind_futures_wheel == 1) {
          graphmind_futures_wheel_add_node($node->nid);
        } else {
          graphmind_futures_wheel_remove_node($node->nid);
        }
      }
			break;
	}
}


/**
 * Check if the node uses the Futures wheel plugin.
 *
 * @param integer $nid
 * @return
 */
function graphmind_futures_wheel_is_node_futures_wheel($nid) {
  if (!$nid) return NULL;

  $res = db_fetch_object(db_query('SELECT COUNT(nid) AS count FROM {graphmind_futures_wheel} WHERE nid = %d;', $nid));

  return (int)$res->count >= 1;
}


/**
 * Add the node to the DB - indicates that it uses the plugin.
 *
 * @param integer $nid
 * @return
 */
function graphmind_futures_wheel_add_node($nid) {
  if (!$nid) return NULL;

  if (graphmind_futures_wheel_is_node_futures_wheel($nid)) {
    return FALSE;
  }

  db_query('INSERT INTO {graphmind_futures_wheel} (nid) VALUES (%d);', $nid);
  return TRUE;
}


/**
 * Remove node from DB - node doesn't use the plugin.
 *
 * @param integer $nid
 * @return
 */
function graphmind_futures_wheel_remove_node($nid) {
  if (!$nid) return NULL;

  if (!graphmind_futures_wheel_is_node_futures_wheel($nid)) {
    return FALSE;
  }

  db_query('DELETE FROM {graphmind_futures_wheel} WHERE nid = %d;', $nid);
  return TRUE;
}


/**
 * Implementation of hook_form_FORM_ID_alter().
 * Add settings to the node type form.
 *
 * @param array $form
 * @param array $form_status
 */
function graphmind_futures_wheel_form_node_type_form_alter($form, $form_status) {
  if ($form['#node_type']->type == 'graphmind') {
    $form['graphmind_futures_wheel'] = array(
      '#type' => 'fieldset',
      '#title' => t('Graphmind - futures wheel settings'),
      '#collapsible' => TRUE,
      '#collapsed' => TRUE,
      'graphmind_futures_wheel_plugin_is_default' => array(
        '#type' => 'checkbox',
        '#title' => t('Futures wheel as a default display'),
        '#description' => t('Select for making the Futures wheel plugin the default display.'),
        '#default_value' => variable_get('graphmind_futures_wheel_plugin_is_default', 0),
      ),
    );
    $form['#submit'][] = 'graphmind_futures_wheel_node_type_form_submit';
  }
}


/**
 * Submit callback for the node type form.
 *
 * @param array $form
 * @param array $form_status
 */
function graphmind_futures_wheel_node_type_form_submit($form, $form_status) {
  variable_set('graphmind_futures_wheel_plugin_is_default', $form_status['values']['graphmind_futures_wheel_plugin_is_default']);
}