/**
* @param bool $sort = true
* @return array
*/
public function getCreateStatements($sort = true)
{
if (!$sort || $this->createsSorted) {
return $this->changes['createTables'];
}
$resolved = [];
$dependencyMap = [];
$pending = [];
//resolve simple tables (no dependencies)
foreach ($this->changes['createTables'] as $query) {
$table = new Table($query);
$tableName = $table->getName();
$depends = $table->getDependencies();
if (!$depends) {
$resolved[$tableName] = $query;
} elseif ($this->dependenciesMet($resolved, $depends)) {
$resolved[$tableName] = $query;
} else {
$dependencyMap[$tableName] = $depends;
$pending[$tableName] = ['query' => $query, 'parsed' => $table];
}
}
//keep checking pending alters until we can't resolve any more queries
$afterCount = count($resolved);
do {
$preCount = $afterCount;
foreach ($dependencyMap as $name => $depends) {
if ($this->dependenciesMet($resolved, $depends)) {
$resolved[$name] = $pending[$name]['query'];
unset($pending[$name]);
} else {
//remove dependencies that might not be in create list here
$clean = [];
foreach ($depends as $name) {
if (isset($resolved[$name]) || isset($pending[$name])) {
$clean[] = $name;
}
}
//rework map
$dependencyMap[$name] = $clean;
}
}
$afterCount = count($resolved);
} while ($preCount != $afterCount);
$this->changes['createTables'] = $this->addMarkedCreates($pending, $resolved);
$this->createsSorted = true;
return $this->changes['createTables'];
}
