/**
* Initialise the import reader and locate the column indexes.
*
* @return bool false is a failed import
*/
public function init() {
if ($this->csvreader == null) {
$this->csvreader = new csv_import_reader($this->importid, 'assignfeedback_offline');
}
$this->csvreader->init();
$columns = $this->csvreader->get_columns();
$strgrade = get_string('grade');
$strid = get_string('recordid', 'assign');
$strmodified = get_string('lastmodifiedgrade', 'assign');
foreach ($this->assignment->get_feedback_plugins() as $plugin) {
if ($plugin->is_enabled() && $plugin->is_visible()) {
foreach ($plugin->get_editor_fields() as $field => $description) {
$this->feedbackcolumnindexes[$description] = array('plugin'=>$plugin,
'field'=>$field,
'description'=>$description);
}
}
}
if ($columns) {
foreach ($columns as $index => $column) {
if (isset($this->feedbackcolumnindexes[$column])) {
$this->feedbackcolumnindexes[$column]['index'] = $index;
}
if ($column == $strgrade) {
$this->gradeindex = $index;
}
if ($column == $strid) {
$this->idindex = $index;
}
if ($column == $strmodified) {
$this->modifiedindex = $index;
}
}
}
if ($this->idindex < 0 || $this->gradeindex < 0 || $this->modifiedindex < 0) {
return false;
}
$groupmode = groups_get_activity_groupmode($this->assignment->get_course_module());
// All users.
$groupid = 0;
$groupname = '';
if ($groupmode) {
$groupid = groups_get_activity_group($this->assignment->get_course_module(), true);
$groupname = groups_get_group_name($groupid).'-';
}
$this->validusers = $this->assignment->list_participants($groupid, false);
return true;
}
