<?php

/**
 * @file
 * Helper logic.
 */

/**
 * Implements hook_node_presave().
 */
function scanner_with_fc_tests_node_presave($node) {
  if (isset($node->devel_generate['word'], $node->field_stuff[LANGUAGE_NONE])) {
    foreach ($node->field_stuff[LANGUAGE_NONE] as $key => &$field) {
      $fc = field_collection_item_load($field['value']);
      if (mt_rand(0, 5) == 5) {
        foreach ($fc->field_text[LANGUAGE_NONE] as $fc_key => &$fc_field) {
          // This field is a single string with a max length of 255. So, the
          // easiest way to replace a single word in the string is to split it
          // into an array, pick an array element at random to replace, and
          // then recombine the string.
          $bits = explode(' ', $fc_field['value']);
          $pos = mt_rand(0, count($bits) - 1);
          $bits[$pos] = $node->devel_generate['word'];
          $fc_field['value'] = substr(implode(' ', $bits), 0, 255);
        }
      }
      else {
        foreach ($fc->field_text[LANGUAGE_NONE] as $fc_key => &$fc_field) {
          $fc_field['value'] = str_replace($node->devel_generate['word'], '', $fc_field['value']);
        }
      }

      // Don't update the host entity.
      $fc->save(TRUE);
    }
  }
}