function opigno_scorm_extract_item_sequencing_objectives in Opigno 7

Extract the manifest SCO item sequencing objective.

This extracts sequencing objectives from an item. Objectives allow the system to know how to "grade" the SCORM object.

Parameters

array $item_manifest:

Return value

array

1 call to opigno_scorm_extract_item_sequencing_objectives()

_opigno_scorm_extract_manifest_scos_items in modules/scorm/includes/opigno_scorm.manifest.inc

Helper function to recursively extract the manifest SCO items.

File

modules/scorm/includes/opigno_scorm.manifest.inc, line 387

Manifest file extraction logic.

Code

function opigno_scorm_extract_item_sequencing_objectives($item_manifest) {
  $objectives = array();
  foreach ($item_manifest['children'] as $child) {
    if ($child['name'] == OPIGNO_SCORM_MANIFEST_OBJECTIVES) {
      foreach ($child['children'] as $child_objective) {
        if (!empty($child_objective['attrs'][OPIGNO_SCORM_MANIFEST_OBJECTIVE_ID_ATTR])) {
          $id = $child_objective['attrs'][OPIGNO_SCORM_MANIFEST_OBJECTIVE_ID_ATTR];
        }
        else {
          $id = uniqid();
        }
        if ($child_objective['name'] == OPIGNO_SCORM_MANIFEST_PRIMARY_OBJECTIVE) {

          // Note: boolean attributes are stored as a strings. PHP does not know
          // how to cast 'false' to FALSE. Use string comparisons to bypass
          // this limitation by PHP. See below.
          $satisfied_by_measure = FALSE;
          if (!empty($child_objective['attrs'][OPIGNO_SCORM_MANIFEST_OBJECTIVE_SATISFIED_BY_MEASURE_ATTR])) {
            $satisfied_by_measure = strtolower($child_objective['attrs'][OPIGNO_SCORM_MANIFEST_OBJECTIVE_SATISFIED_BY_MEASURE_ATTR]) === 'true';
          }
          $objective = array(
            'primary' => TRUE,
            'secondary' => FALSE,
            'id' => $id,
            'satisfied_by_measure' => $satisfied_by_measure,
          );
          foreach ($child_objective['children'] as $primary_obj_child) {
            if ($primary_obj_child['name'] == OPIGNO_SCORM_MANIFEST_MIN_NORMALIZED_MEASURE) {
              $objective['min_normalized_measure'] = $primary_obj_child['tagData'];
            }
            elseif ($primary_obj_child['name'] == OPIGNO_SCORM_MANIFEST_MAX_NORMALIZED_MEASURE) {
              $objective['max_normalized_measure'] = $primary_obj_child['tagData'];
            }
          }
          $objectives[] = $objective;
        }
        elseif ($child_objective['name'] == OPIGNO_SCORM_MANIFEST_OBJECTIVE) {
          $objectives[] = array(
            'primary' => FALSE,
            'secondary' => TRUE,
            'id' => $id,
          );
        }
      }
    }
  }
  return $objectives;
}