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Split DBStructure & View to avoid DB-calls and dependencies for basic operations

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- new "Definition" classes vor DB and Views
- new "Writer" classes to create SQL definitions for DB and Views
- DBStructure & View are responsible to execute DB-querys
This commit is contained in:
Philipp Holzer 2022-07-12 23:21:16 +02:00
commit a910fd8864
Signed by: nupplaPhil
GPG key ID: 24A7501396EB5432
30 changed files with 898 additions and 608 deletions
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132
src/Database/View.php
View file

@ -21,60 +21,11 @@
namespace Friendica\Database;
use Exception;
use Friendica\Core\Hook;
use Friendica\DI;
use Friendica\Util\Writer\ViewDefinitionSqlWriter;
class View
{
/**
* view definition loaded from static/dbview.config.php
*
* @var array
*/
private static $definition = [];
/**
* Loads the database structure definition from the static/dbview.config.php file.
* On first pass, defines DB_UPDATE_VERSION constant.
*
* @see static/dbview.config.php
* @param string $basePath The base path of this application
* @param boolean $with_addons_structure Whether to tack on addons additional tables
* @return array
* @throws Exception
*/
public static function definition(string $basePath = '', bool $with_addons_structure = true): array
{
if (!self::$definition) {
if (empty($basePath)) {
$basePath = DI::app()->getBasePath();
}
$filename = $basePath . '/static/dbview.config.php';
if (!is_readable($filename)) {
throw new Exception('Missing database view config file static/dbview.config.php');
}
$definition = require $filename;
if (!$definition) {
throw new Exception('Corrupted database view config file static/dbview.config.php');
}
self::$definition = $definition;
} else {
$definition = self::$definition;
}
if ($with_addons_structure) {
Hook::callAll('dbview_definition', $definition);
}
return $definition;
}
/**
* Creates a view
*
@ -85,94 +36,29 @@ class View
public static function create(bool $verbose, bool $action)
{
// Delete previously used views that aren't used anymore
foreach(['post-view', 'post-thread-view'] as $view) {
foreach (['post-view', 'post-thread-view'] as $view) {
if (self::isView($view)) {
$sql = sprintf("DROP VIEW IF EXISTS `%s`", DBA::escape($view));
if (!empty($sql) && $verbose) {
echo $sql . ";\n";
}
if (!empty($sql) && $action) {
DBA::e($sql);
}
}
}
$definition = self::definition();
$definition = DI::viewDefinition()->getAll();
foreach ($definition as $name => $structure) {
self::createView($name, $structure, $verbose, $action);
}
}
/**
* Prints view structure
*
* @param string $basePath Base path
* @return void
*/
public static function printStructure(string $basePath)
{
$database = self::definition($basePath, false);
foreach ($database as $name => $structure) {
echo "--\n";
echo "-- VIEW $name\n";
echo "--\n";
self::createView($name, $structure, true, false);
echo "\n";
}
}
/**
* Creates view
*
* @param string $name Name of view
* @param array $structure Structure of view
* @param bool $verbose Whether to show SQL statements
* @param bool $action Whether to execute SQL statements
* @return bool Whether execution went fine
*/
private static function createView(string $name, array $structure, bool $verbose, bool $action): bool
{
$r = true;
$sql_rows = [];
foreach ($structure['fields'] as $fieldname => $origin) {
if (is_string($origin)) {
$sql_rows[] = $origin . " AS `" . DBA::escape($fieldname) . "`";
} elseif (is_array($origin) && (sizeof($origin) == 2)) {
$sql_rows[] = "`" . DBA::escape($origin[0]) . "`.`" . DBA::escape($origin[1]) . "` AS `" . DBA::escape($fieldname) . "`";
if (self::isView($name)) {
DBA::e(sprintf("DROP VIEW IF EXISTS `%s`", DBA::escape($name)));
} elseif (self::isTable($name)) {
DBA::e(sprintf("DROP TABLE IF EXISTS `%s`", DBA::escape($name)));
}
DBA::e(ViewDefinitionSqlWriter::createView($name, $structure));
}
if (self::isView($name)) {
$sql = sprintf("DROP VIEW IF EXISTS `%s`", DBA::escape($name));
} elseif (self::isTable($name)) {
$sql = sprintf("DROP TABLE IF EXISTS `%s`", DBA::escape($name));
}
if (!empty($sql) && $verbose) {
echo $sql . ";\n";
}
if (!empty($sql) && $action) {
DBA::e($sql);
}
$sql = sprintf("CREATE VIEW `%s` AS SELECT \n\t", DBA::escape($name)) .
implode(",\n\t", $sql_rows) . "\n\t" . $structure['query'];
if ($verbose) {
echo $sql . ";\n";
}
if ($action) {
$r = DBA::e($sql);
}
return $r;
}
/**