/**
* Re-orders the object based on it's current state and new position
*
* @internal
*
* @param fActiveRecord $object The fActiveRecord instance
* @param array &$values The current values
* @param array &$old_values The old values
* @param array &$related_records Any records related to this record
* @param array &$cache The cache array for the record
* @return void
*/
public static function reorder($object, &$values, &$old_values, &$related_records, &$cache)
{
$class = get_class($object);
$table = fORM::tablize($class);
$column = self::$ordering_columns[$class]['column'];
$other_columns = self::$ordering_columns[$class]['other_columns'];
$current_value = $values[$column];
if (!$object->exists()) {
$old_value = fActiveRecord::retrieveOld($old_values, $column);
} else {
$old_value = fORMDatabase::retrieve()->translatedQuery("SELECT " . $column . " FROM " . $table . " WHERE " . fORMDatabase::createPrimaryKeyWhereClause($table, $table, $values, $old_values))->fetchScalar();
}
// Figure out the range we are dealing with
$sql = "SELECT max(" . $column . ") FROM " . $table;
if ($other_columns) {
$sql .= " WHERE " . self::createOtherFieldsWhereClause($table, $other_columns, $values);
}
$current_max_value = (int) fORMDatabase::retrieve()->translatedQuery($sql)->fetchScalar();
$new_max_value = $current_max_value;
if ($new_set = self::isInNewSet($column, $other_columns, $values, $old_values)) {
$new_max_value = $current_max_value + 1;
}
$changed = FALSE;
// If a blank value was set, correct it to the old value (if there
// was one), or a new value at the end of the set
if ($current_value === '' || $current_value === NULL) {
if ($old_value) {
$current_value = $old_value;
} else {
$current_value = $new_max_value;
}
$changed = TRUE;
}
// When we move an object into a new set and the value didn't change then move it to the end of the new set
if ($new_set && $object->exists() && ($old_value === NULL || $old_value == $current_value)) {
$current_value = $new_max_value;
$changed = TRUE;
}
// If the value is too high, then set it to the last value
if ($current_value > $new_max_value) {
$current_value = $new_max_value;
$changed = TRUE;
}
if ($changed) {
fActiveRecord::assign($values, $old_values, $column, $current_value);
}
// If the value didn't change, we can exit
$value_didnt_change = $old_value && $current_value == $old_value || !$old_value;
if (!$new_set && $value_didnt_change) {
return;
}
// If we are entering a new record at the end of the set we don't need to shuffle anything either
if (!$object->exists() && $new_set && $current_value == $new_max_value) {
return;
}
// If the object already exists in the database, grab the ordering value
// right now in case some other object reordered it since it was loaded
if ($object->exists()) {
$sql = "SELECT " . $column . " FROM " . $table . " WHERE ";
$sql .= fORMDatabase::createPrimaryKeyWhereClause($table, $table, $values, $old_values);
$db_value = (int) fORMDatabase::retrieve()->translatedQuery($sql)->fetchScalar();
}
// We only need to move things in the new set around if we are inserting into the middle
// of a new set, or if we are moving around in the current set
if (!$new_set || $new_set && $current_value != $new_max_value) {
$shift_down = $new_max_value + 10;
// If we are moving into the middle of a new set we just push everything up one value
if ($new_set) {
$shift_up = $new_max_value + 11;
$down_condition = $column . " >= " . $current_value;
// If we are moving a value down in a set, we push values in the difference zone up one
} elseif ($current_value < $db_value) {
$shift_up = $new_max_value + 11;
$down_condition = $column . " < " . $db_value . " AND " . $column . " >= " . $current_value;
// If we are moving a value up in a set, we push values in the difference zone down one
} else {
$shift_up = $new_max_value + 9;
$down_condition = $column . " > " . $db_value . " AND " . $column . " <= " . $current_value;
}
// To prevent issues with the unique constraint, we move everything below 0
$sql = "UPDATE " . $table . " SET " . $column . " = " . $column . " - " . $shift_down;
$sql .= " WHERE " . $down_condition;
if ($other_columns) {
$sql .= " AND " . self::createOtherFieldsWhereClause($table, $other_columns, $values);
}
fORMDatabase::retrieve()->translatedQuery($sql);
if ($object->exists()) {
// Put the actual record we are changing in limbo to be updated when the actual update happens
$sql = "UPDATE " . $table . " SET " . $column . " = 0";
$sql .= " WHERE " . $column . " = " . $db_value;
if ($other_columns) {
$sql .= " AND " . self::createOldOtherFieldsWhereClause($table, $other_columns, $values, $old_values);
}
fORMDatabase::retrieve()->translatedQuery($sql);
}
// Anything below zero needs to be moved back up into its new position
$sql = "UPDATE " . $table . " SET " . $column . " = " . $column . " + " . $shift_up;
$sql .= " WHERE " . $column . " < 0";
if ($other_columns) {
$sql .= " AND " . self::createOtherFieldsWhereClause($table, $other_columns, $values);
}
fORMDatabase::retrieve()->translatedQuery($sql);
}
// If there was an old set, we need to close the gap
if ($object->exists() && $new_set) {
$sql = "SELECT max(" . $column . ") FROM " . $table . " WHERE ";
$sql .= self::createOldOtherFieldsWhereClause($table, $other_columns, $values, $old_values);
$old_set_max = (int) fORMDatabase::retrieve()->translatedQuery($sql)->fetchScalar();
// We only need to close the gap if the record was not at the end
if ($db_value < $old_set_max) {
$shift_down = $old_set_max + 10;
$shift_up = $old_set_max + 9;
// To prevent issues with the unique constraint, we move everything below 0 and then back up above
$sql = "UPDATE " . $table . " SET " . $column . ' = ' . $column . ' - ' . $shift_down . " WHERE ";
$sql .= self::createOldOtherFieldsWhereClause($table, $other_columns, $values, $old_values);
$sql .= " AND " . $column . " > " . $db_value;
fORMDatabase::retrieve()->translatedQuery($sql);
if ($current_value == $new_max_value) {
// Put the actual record we are changing in limbo to be updated when the actual update happens
$sql = "UPDATE " . $table . " SET " . $column . " = 0";
$sql .= " WHERE " . $column . " = " . $db_value;
if ($other_columns) {
$sql .= " AND " . self::createOldOtherFieldsWhereClause($table, $other_columns, $values, $old_values);
}
fORMDatabase::retrieve()->translatedQuery($sql);
}
$sql = "UPDATE " . $table . " SET " . $column . ' = ' . $column . ' + ' . $shift_up . " WHERE ";
$sql .= self::createOldOtherFieldsWhereClause($table, $other_columns, $values, $old_values);
$sql .= " AND " . $column . " < 0";
fORMDatabase::retrieve()->translatedQuery($sql);
}
}
}
/**
* Loads a record from the database
*
* @throws fNotFoundException When the record could not be found in the database
*
* @return fActiveRecord The record object, to allow for method chaining
*/
public function load()
{
$class = get_class($this);
if (fORM::getActiveRecordMethod($class, 'load')) {
return $this->__call('load', array());
}
try {
$table = fORM::tablize($class);
$sql = 'SELECT * FROM ' . $table . ' WHERE ' . fORMDatabase::createPrimaryKeyWhereClause($table, $table, $this->values, $this->old_values);
$result = fORMDatabase::retrieve()->translatedQuery($sql);
$result->tossIfNoRows();
} catch (fExpectedException $e) {
throw new fNotFoundException('The %s requested could not be found', fORM::getRecordName($class));
}
$this->loadFromResult($result, TRUE);
return $this;
}
