public function extractArtifactDateFields(Tracker_Artifact $artifact, Tracker_Artifact_Changeset $last_changeset, array &$properties)
{
$tracker = $artifact->getTracker();
$custom_date_fields = $this->form_element_factory->getUsedCustomDateFields($tracker);
foreach ($custom_date_fields as $date_field) {
$last_changeset_value = $last_changeset->getValue($date_field);
if ($last_changeset->getValue($date_field) && $last_changeset_value) {
$properties[$date_field->getName()] = date('c', $last_changeset_value->getTimestamp());
}
}
$core_date_fields = $this->form_element_factory->getCoreDateFields($tracker);
foreach ($core_date_fields as $date_field) {
if ($date_field instanceof Tracker_FormElement_Field_SubmittedOn) {
$properties[$date_field->getName()] = date('c', $artifact->getSubmittedOn());
} elseif ($date_field instanceof Tracker_FormElement_Field_LastUpdateDate) {
$properties[$date_field->getName()] = date('c', $artifact->getLastUpdateDate());
}
}
$last_modified = $artifact->getLastUpdateDate();
if ($last_modified === -1) {
$last_modified = $artifact->getSubmittedOn();
}
$properties[self::LAST_UPDATE_PROPERTY] = date('c', $last_modified);
}
private function isUpdatingLatestVersion(Tracker_Artifact $artifact)
{
$valid_unmodified = true;
$valid_match = true;
if (isset($_SERVER['HTTP_IF_UNMODIFIED_SINCE'])) {
$client_version = strtotime($_SERVER['HTTP_IF_UNMODIFIED_SINCE']);
$last_version = $artifact->getLastUpdateDate();
$valid_unmodified = $last_version == $client_version;
}
if (isset($_SERVER['HTTP_IF_MATCH'])) {
$client_version = $_SERVER['HTTP_IF_MATCH'];
$last_version = $artifact->getVersionIdentifier();
$valid_match = $last_version == $client_version;
}
return $valid_unmodified && $valid_match;
}