public static function getMap($current_class, $target_table, $relation = null, $join = false)
{
if (isset(SalamaData::$c[$relation])) {
# TABLE: (possible) belongsTo (foreignKey) relation via Table; FK JOIN
$target_table = $current_class;
$map = self::$belongsTo;
if (SalamaBuild::getRelation($relation, $target_table, 'ref')) {
list($fk, $pk) = SalamaBuild::getRelation($relation, $target_table, 'both');
}
# inverse belongsTo
if (empty($fk)) {
$map = self::$hasOne;
list($pk, $fk) = SalamaBuild::getRelation($target_table, $relation, 'both');
}
# check for hasMany under JOIN conditions
if ($join) {
if (isset(SalamaData::$rel[self::$hasMany][$target_table][$relation])) {
$relation = SalamaData::$rel[self::$hasMany][$target_table][$relation][0];
$map = self::$hasMany;
}
}
} else {
# hasOne/hasMany relation (fieldname)
if (isset(SalamaData::$c[$target_table][$relation])) {
$field = SalamaData::$c[$target_table][$relation];
# Table.column_name (key=>val settings)
if (isset($field[self::$belongsTo])) {
$map = self::$belongsTo;
} elseif (isset($field[self::$hasOne])) {
$map = self::$hasOne;
} elseif (isset($field[self::$hasMany])) {
$map = self::$hasMany;
}
if (isset($field['foreignkey'])) {
$fk = $field['foreignkey'];
} elseif (isset($field[self::$through])) {
# through (m:m)?
list($pk, $fk) = SalamaBuild::getRelation($field[self::$through], $target_table, 'both');
} else {
list($pk, $fk) = SalamaBuild::getRelation($current_class, $target_table, 'both');
}
} else {
# FK taken from Table we are obtaining data from; _rel[reference][target]
list($pk, $fk) = SalamaBuild::getRelation($current_class, $target_table, 'both');
}
}
return array('map' => isset($map) ? $map : null, 'foreignkey' => isset($fk) ? $fk : null, 'localkey' => isset($pk) ? $pk : null);
}
