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<?php
/**
* Classes to create relation schema in Dia format.
*/
declare(strict_types=1);
namespace PhpMyAdmin\Plugins\Schema\Dia;
use PhpMyAdmin\Plugins\Schema\ExportRelationSchema;
use function in_array;
/**
* Dia Relation Schema Class
*
* Purpose of this class is to generate the Dia XML Document
* which is used for representing the database diagrams in Dia IDE
* This class uses Database Table and Reference Objects of Dia and with
* the combination of these objects actually helps in preparing Dia XML.
*
* Dia XML is generated by using XMLWriter php extension and this class
* inherits ExportRelationSchema class has common functionality added
* to this class
*
* @property Dia $diagram
*/
class DiaRelationSchema extends ExportRelationSchema
{
/** @var TableStatsDia[] */
private $tables = [];
/** @var RelationStatsDia[] Relations */
private $relations = [];
/** @var float */
private $topMargin = 2.8222000598907471;
/** @var float */
private $bottomMargin = 2.8222000598907471;
/** @var float */
private $leftMargin = 2.8222000598907471;
/** @var float */
private $rightMargin = 2.8222000598907471;
/** @var int */
public static $objectId = 0;
/**
* Upon instantiation This outputs the Dia XML document
* that user can download
*
* @see Dia
* @see TableStatsDia
* @see RelationStatsDia
*
* @param string $db database name
*/
public function __construct($db)
{
parent::__construct($db, new Dia());
$this->setShowColor(isset($_REQUEST['dia_show_color']));
$this->setShowKeys(isset($_REQUEST['dia_show_keys']));
$this->setOrientation((string) $_REQUEST['dia_orientation']);
$this->setPaper((string) $_REQUEST['dia_paper']);
$this->diagram->startDiaDoc(
$this->paper,
$this->topMargin,
$this->bottomMargin,
$this->leftMargin,
$this->rightMargin,
$this->orientation
);
$alltables = $this->getTablesFromRequest();
foreach ($alltables as $table) {
if (isset($this->tables[$table])) {
continue;
}
$this->tables[$table] = new TableStatsDia(
$this->diagram,
$this->db,
$table,
$this->pageNumber,
$this->showKeys,
$this->offline
);
}
$seen_a_relation = false;
foreach ($alltables as $one_table) {
$exist_rel = $this->relation->getForeigners($this->db, $one_table, '', 'both');
if (! $exist_rel) {
continue;
}
$seen_a_relation = true;
foreach ($exist_rel as $master_field => $rel) {
// put the foreign table on the schema only if selected by the user
// (do not use array_search() because we would have to do a === false and this is not PHP3 compatible)
if ($master_field !== 'foreign_keys_data') {
if (in_array($rel['foreign_table'], $alltables)) {
$this->addRelation(
$one_table,
$master_field,
$rel['foreign_table'],
$rel['foreign_field'],
$this->showKeys
);
}
continue;
}
foreach ($rel as $one_key) {
if (! in_array($one_key['ref_table_name'], $alltables)) {
continue;
}
foreach ($one_key['index_list'] as $index => $one_field) {
$this->addRelation(
$one_table,
$one_field,
$one_key['ref_table_name'],
$one_key['ref_index_list'][$index],
$this->showKeys
);
}
}
}
}
$this->drawTables();
if ($seen_a_relation) {
$this->drawRelations();
}
$this->diagram->endDiaDoc();
}
/**
* @return array{fileName: non-empty-string, fileData: string}
*/
public function getExportInfo(): array
{
return ['fileName' => $this->getFileName('.dia'), 'fileData' => $this->diagram->getOutputData()];
}
/**
* Defines relation objects
*
* @see TableStatsDia::__construct(),RelationStatsDia::__construct()
*
* @param string $masterTable The master table name
* @param string $masterField The relation field in the master table
* @param string $foreignTable The foreign table name
* @param string $foreignField The relation field in the foreign table
* @param bool $showKeys Whether to display ONLY keys or not
*/
private function addRelation(
$masterTable,
$masterField,
$foreignTable,
$foreignField,
$showKeys
): void {
if (! isset($this->tables[$masterTable])) {
$this->tables[$masterTable] = new TableStatsDia(
$this->diagram,
$this->db,
$masterTable,
$this->pageNumber,
$showKeys
);
}
if (! isset($this->tables[$foreignTable])) {
$this->tables[$foreignTable] = new TableStatsDia(
$this->diagram,
$this->db,
$foreignTable,
$this->pageNumber,
$showKeys
);
}
$this->relations[] = new RelationStatsDia(
$this->diagram,
$this->tables[$masterTable],
$masterField,
$this->tables[$foreignTable],
$foreignField
);
}
/**
* Draws relation references
*
* connects master table's master field to
* foreign table's foreign field using Dia object
* type Database - Reference
*
* @see RelationStatsDia::relationDraw()
*/
private function drawRelations(): void
{
foreach ($this->relations as $relation) {
$relation->relationDraw($this->showColor);
}
}
/**
* Draws tables
*
* Tables are generated using Dia object type Database - Table
* primary fields are underlined and bold in tables
*
* @see TableStatsDia::tableDraw()
*/
private function drawTables(): void
{
foreach ($this->tables as $table) {
$table->tableDraw($this->showColor);
}
}
}
|
