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<?php
namespace Inlm\SchemaGenerator\Utils;
use CzProject\SqlSchema;
use Inlm\SchemaGenerator\DataType;
use Inlm\SchemaGenerator\DuplicatedException;
use Inlm\SchemaGenerator\MissingException;
class Generator
{
private $options;
private $schema;
private $tables = array();
private $columns = array();
private $indexes = array();
private $foreignKeys = array();
private $relationships = array();
private $hasManyTables = array();
public function __construct(array $options = array())
{
$this->options = $options;
$this->schema = new SqlSchema\Schema;
}
public function getSchema()
{
return $this->schema;
}
public function addRelationship($sourceTable, $sourceColumn, $targetTable)
{
if (isset($this->relationships[$sourceTable][$sourceColumn])) {
if ($this->relationships[$sourceTable][$sourceColumn] !== $targetTable) {
throw new DuplicatedException("Already exists relationship for column '$sourceTable'.'$sourceColumn'.");
}
}
$this->relationships[$sourceTable][$sourceColumn] = $targetTable;
return $this;
}
public function addHasManyTable($tableName, $sourceTable, $sourceColumn, $targetTable, $targetColumn)
{
if (isset($this->hasManyTables[$tableName])) {
$diff = $this->hasManyTables[$tableName]['sourceTable'] !== $sourceTable
|| $this->hasManyTables[$tableName]['sourceColumn'] !== $sourceColumn
|| $this->hasManyTables[$tableName]['targetTable'] !== $targetTable
|| $this->hasManyTables[$tableName]['targetColumn'] !== $targetColumn;
if ($diff && $inverseDiff) {
throw new DuplicatedException("HasManyTable already exists for different relation.");
}
}
$this->hasManyTables[$tableName] = array(
'sourceTable' => $sourceTable,
'sourceColumn' => $sourceColumn,
'targetTable' => $targetTable,
'targetColumn' => $targetColumn,
);
$this->addRelationship($tableName, $sourceColumn, $sourceTable);
$this->addRelationship($tableName, $targetColumn, $targetTable);
return $this;
}
public function createHasManyTables()
{
foreach ($this->hasManyTables as $hasManyTable => $data) {
if (!$this->hasTable($hasManyTable)) {
$table = $this->createTable($hasManyTable);
$this->addColumn($hasManyTable, $data['sourceColumn'], NULL, 'VIRTUAL');
$this->addColumn($hasManyTable, $data['targetColumn'], NULL, 'VIRTUAL');
$this->addPrimaryIndex($hasManyTable, array($data['sourceColumn'], $data['targetColumn']), 'VIRTUAL');
$this->addIndex($hasManyTable, $data['targetColumn'], 'VIRTUAL');
}
}
}
public function createRelationships()
{
foreach ($this->relationships as $sourceTable => $sourceColumns) {
foreach ($sourceColumns as $sourceColumn => $targetTable) {
if (!$this->hasTable($sourceTable)) {
throw new MissingException("Missing source table '$sourceTable' for relationship '$sourceTable'.'$sourceColumn' => '$targetTable'.");
}
if (!$this->hasTable($targetTable)) {
throw new MissingException("Missing target table '$targetTable' for relationship '$sourceTable'.'$sourceColumn' => '$targetTable'.");
}
if ($this->tables[$targetTable]['primaryColumn'] === NULL) {
throw new MissingException("Table '$targetTable' has no primary column.");
}
$targetColumn = $this->tables[$targetTable]['primaryColumn'];
$_sourceTable = $this->tables[$sourceTable]['table'];
$_sourceColumn = $_sourceTable->getColumn($sourceColumn);
$_targetTable = $this->tables[$targetTable]['table'];
$_targetColumn = $_targetTable->getColumn($targetColumn);
if ($_sourceColumn === NULL) {
throw new MissingException("Missing column '$sourceTable'.'$sourceColumn'.");
}
if ($_targetColumn === NULL) {
throw new MissingException("Missing column '$targetTable'.'$targetColumn'.");
}
$_sourceType = $_sourceColumn->getType();
$_targetType = $_targetColumn->getType();
if ($_sourceType !== NULL) {
throw new DuplicatedException("Column '$sourceTable'.'$sourceColumn' has already data type. Column is required in relationship '$sourceTable'.'$sourceColumn' => '$targetTable'.");
}
if ($_targetType === NULL) {
throw new MissingException("Column '$targetTable'.'$targetColumn' has no data type. Column is required in relationship '$sourceTable'.'$sourceColumn' => '$targetTable'.");
}
$_sourceColumn->setType($_targetColumn->getType());
$_sourceColumn->setParameters($_targetColumn->getParameters());
$_sourceColumn->setOptions($_targetColumn->getOptions());
$_sourceTable->addForeignKey(
$this->formatForeignKey($sourceTable, $sourceColumn),
$sourceColumn,
$targetTable,
$targetColumn
);
}
}
}
public function createTable($tableName, $primaryColumn = NULL)
{
if (!isset($this->tables[$tableName])) {
$table = $this->schema->addTable($tableName);
foreach ($this->options as $option => $optionValue) {
$table->setOption($option, $optionValue);
}
$this->tables[$tableName] = array(
'table' => $table,
'primaryColumn' => $primaryColumn,
);
}
return $this->tables[$tableName]['table'];
}
public function getTable($tableName)
{
if (!$this->hasTable($tableName)) {
throw new MissingException("Missing table '$tableName'.");
}
return $this->tables[$tableName]['table'];
}
public function hasTable($tableName)
{
return isset($this->tables[$tableName]);
}
public function getTablePrimaryColumn($tableName)
{
if (!$this->hasTable($tableName)) {
throw new MissingException("Missing table '$tableName'.");
}
return $this->tables[$tableName]['primaryColumn'];
}
public function isTablePrimaryColumn($tableName, $columnName)
{
if (!$this->hasTable($tableName)) {
throw new MissingException("Missing table '$tableName'.");
}
return $columnName !== NULL && $this->tables[$tableName]['primaryColumn'] === $columnName;
}
public function addColumn($tableName, $columnName, DataType $columnType = NULL, $sourceId = NULL)
{
if (isset($this->columns[$tableName][$columnName])) {
$origSource = $this->columns[$tableName][$columnName]['source'];
if ($origSource !== $sourceId) {
throw new DuplicatedException("Column '$columnName' for table '$tableName' already exists.");
}
$column = $this->columns[$tableName][$columnName]['column'];
if ($columnType) {
$column->setType($columnType->getType());
$column->setParameters($columnType->getParameters());
$column->setOptions($columnType->getOptions());
}
return $column;
}
$table = $this->getTable($tableName);
$column = $table->addColumn($columnName, NULL, array(), array());
if ($columnType) {
$column->setType($columnType->getType());
$column->setParameters($columnType->getParameters());
$column->setOptions($columnType->getOptions());
}
$this->columns[$tableName][$columnName] = array(
'source' => $sourceId,
'column' => $column,
);
return $column;
}
public function getColumnType($tableName, $columnName)
{
if (!isset($this->columns[$tableName][$columnName])) {
return NULL;
}
$column = $this->columns[$tableName][$columnName];
return new DataType(
$column->getType(),
$column->getParameters(),
$column->getOptions()
);
}
public function addIndex($tableName, $columns, $sourceId = NULL)
{
$this->addTableIndex($tableName, SqlSchema\Index::TYPE_INDEX, $columns, $sourceId);
return $this;
}
public function addUniqueIndex($tableName, $columns, $sourceId = NULL)
{
$this->addTableIndex($tableName, SqlSchema\Index::TYPE_UNIQUE, $columns, $sourceId);
return $this;
}
public function addPrimaryIndex($tableName, $columns, $sourceId = NULL)
{
$this->addTableIndex($tableName, SqlSchema\Index::TYPE_PRIMARY, $columns, $sourceId);
return $this;
}
public function hasPrimaryIndex($tableName)
{
return isset($this->indexes[$tableName][NULL]);
}
protected function addTableIndex($tableName, $type, $columns, $sourceId = NULL)
{
$indexName = $type !== SqlSchema\Index::TYPE_PRIMARY ? $this->formatIndexName($columns) : NULL;
if (isset($this->indexes[$tableName][$indexName])) {
$origSource = $this->indexes[$tableName][$indexName]['source'];
$origType = $this->indexes[$tableName][$indexName]['source']->getType();
if ($origType !== $type) {
throw new DuplicatedException("Type mismatch for index '$indexName' in table '$tableName'. Original type '$origType', new type '$type'.");
}
if ($origSource !== $sourceId) {
throw new DuplicatedException("Index '$indexName' for table '$tableName' already exists.");
}
return;
}
$table = $this->getTable($tableName);
$this->indexes[$tableName][$indexName] = array(
'source' => $sourceId,
'index' => $table->addIndex($indexName, $type, $columns),
);
}
protected function formatIndexName($columns)
{
if (!is_array($columns)) {
$columns = array($columns);
}
return implode('_', $columns);
}
protected function formatForeignKey($table, $columns)
{
if (!is_array($columns)) {
$columns = array($columns);
}
return $table . '_fk_' . implode('_', $columns);
}
}