626 lines
20 KiB
PHP
626 lines
20 KiB
PHP
<?php
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namespace nulib\db;
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use nulib\cl;
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use nulib\db\cache\cache;
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use nulib\php\func;
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use nulib\ValueException;
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use Traversable;
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/**
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* Class CapacitorStorage: objet permettant d'accumuler des données pour les
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* réutiliser plus tard
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*/
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abstract class CapacitorStorage {
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abstract function db(): IDatabase;
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/** @var CapacitorChannel[] */
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protected $channels;
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function addChannel(CapacitorChannel $channel): CapacitorChannel {
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$this->_create($channel);
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$this->channels[$channel->getName()] = $channel;
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return $channel;
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}
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protected function getChannel(?string $name): CapacitorChannel {
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CapacitorChannel::verifix_name($name);
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$channel = $this->channels[$name] ?? null;
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if ($channel === null) {
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$channel = $this->addChannel(new CapacitorChannel($name));
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}
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return $channel;
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}
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/** DOIT être défini dans les classes dérivées */
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const PRIMARY_KEY_DEFINITION = null;
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const COLUMN_DEFINITIONS = [
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"item__" => CapacitorChannel::SERIAL_DEFINITION,
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"item__sum_" => CapacitorChannel::SUM_DEFINITION,
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"created_" => "datetime",
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"modified_" => "datetime",
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];
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protected function ColumnDefinitions(CapacitorChannel $channel): array {
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$definitions = [];
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if ($channel->getPrimaryKeys() === null) {
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$definitions[] = static::PRIMARY_KEY_DEFINITION;
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}
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$definitions[] = $channel->getColumnDefinitions();
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$definitions[] = static::COLUMN_DEFINITIONS;
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# forcer les définitions sans clé à la fin (sqlite requière par exemple que
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# primary key (columns) soit à la fin)
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$tmp = cl::merge(...$definitions);
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$definitions = [];
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$constraints = [];
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$index = 0;
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foreach ($tmp as $col => $def) {
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if ($col === $index) {
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$index++;
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$constraints[] = $def;
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} else {
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$definitions[$col] = $def;
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}
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}
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return cl::merge($definitions, $constraints);
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}
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/** sérialiser les valeurs qui doivent l'être dans $values */
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protected function serialize(CapacitorChannel $channel, ?array $values): ?array {
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if ($values === null) return null;
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$cols = $this->ColumnDefinitions($channel);
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$index = 0;
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$row = [];
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foreach (array_keys($cols) as $col) {
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$key = $col;
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if ($key === $index) {
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$index++;
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} elseif ($channel->isSerialCol($key)) {
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[$serialCol, $sumCol] = $channel->getSumCols($key);
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if (array_key_exists($key, $values)) {
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$sum = $channel->getSum($key, $values[$key]);
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$row[$serialCol] = $sum[$serialCol];
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if (array_key_exists($sumCol, $cols)) {
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$row[$sumCol] = $sum[$sumCol];
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}
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}
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} elseif (array_key_exists($key, $values)) {
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$row[$col] = $values[$key];
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}
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}
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return $row;
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}
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/** désérialiser les valeurs qui doivent l'être dans $values */
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protected function unserialize(CapacitorChannel $channel, ?array $row): ?array {
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if ($row === null) return null;
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$cols = $this->ColumnDefinitions($channel);
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$index = 0;
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$values = [];
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foreach (array_keys($cols) as $col) {
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$key = $col;
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if ($key === $index) {
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$index++;
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} elseif (!array_key_exists($col, $row)) {
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} elseif ($channel->isSerialCol($key)) {
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$value = $row[$col];
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if ($value !== null) $value = $channel->unserialize($value);
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$values[$key] = $value;
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} else {
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$values[$key] = $row[$col];
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}
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}
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return $values;
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}
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function getPrimaryKeys(CapacitorChannel $channel): array {
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$primaryKeys = $channel->getPrimaryKeys();
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if ($primaryKeys === null) $primaryKeys = ["id_"];
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return $primaryKeys;
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}
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function getRowIds(CapacitorChannel $channel, ?array $row, ?array &$primaryKeys=null): ?array {
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$primaryKeys = $this->getPrimaryKeys($channel);
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$rowIds = cl::select($row, $primaryKeys);
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if (cl::all_n($rowIds)) return null;
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else return $rowIds;
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}
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protected function _createSql(CapacitorChannel $channel): array {
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$cols = $this->ColumnDefinitions($channel);
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return [
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"create table if not exists",
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"table" => $channel->getTableName(),
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"cols" => $cols,
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];
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}
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protected static function format_sql(CapacitorChannel $channel, string $sql): string {
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$class = get_class($channel);
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return <<<EOT
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-- -*- coding: utf-8 mode: sql -*- vim:sw=4:sts=4:et:ai:si:sta:fenc=utf-8
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-- autogénéré à partir de $class
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$sql;
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EOT;
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}
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abstract function _getCreateSql(CapacitorChannel $channel): string;
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/** obtenir la requête SQL utilisée pour créer la table */
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function getCreateSql(?string $channel): string {
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return $this->_getCreateSql($this->getChannel($channel));
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}
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protected function _afterCreate(CapacitorChannel $channel): void {
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}
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protected function _create(CapacitorChannel $channel): void {
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$channel->ensureSetup();
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if (!$channel->isCreated()) {
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$this->db->exec($this->_createSql($channel));
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$this->_afterCreate($channel);
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$channel->setCreated();
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}
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}
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/** tester si le canal spécifié existe */
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abstract function _exists(CapacitorChannel $channel): bool;
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function exists(?string $channel): bool {
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return $this->_exists($this->getChannel($channel));
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}
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/** s'assurer que le canal spécifié existe */
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function _ensureExists(CapacitorChannel $channel): void {
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$this->_create($channel);
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}
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function ensureExists(?string $channel): void {
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$this->_ensureExists($this->getChannel($channel));
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}
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protected function _beforeReset(CapacitorChannel $channel): void {
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}
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/** supprimer le canal spécifié */
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function _reset(CapacitorChannel $channel, bool $recreate=false): void {
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$this->_beforeReset($channel);
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$this->db->exec([
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"drop table if exists",
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$channel->getTableName(),
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]);
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$channel->setCreated(false);
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if ($recreate) $this->_ensureExists($channel);
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}
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function reset(?string $channel, bool $recreate=false): void {
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$this->_reset($this->getChannel($channel), $recreate);
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}
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/**
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* charger une valeur dans le canal
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*
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* Après avoir calculé les valeurs des clés supplémentaires
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* avec {@link CapacitorChannel::getItemValues()}, l'une des deux fonctions
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* {@link CapacitorChannel::onCreate()} ou {@link CapacitorChannel::onUpdate()}
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* est appelée en fonction du type d'opération: création ou mise à jour
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*
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* Ensuite, si $func !== null, la fonction est appelée avec la signature de
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* {@link CapacitorChannel::onCreate()} ou {@link CapacitorChannel::onUpdate()}
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* en fonction du type d'opération: création ou mise à jour
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*
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* Dans les deux cas, si la fonction retourne un tableau, il est utilisé pour
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* modifier les valeurs insérées/mises à jour. De plus, $values obtient la
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* valeur finale des données insérées/mises à jour
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*
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* Si $args est renseigné, il est ajouté aux arguments utilisés pour appeler
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* les méthodes {@link CapacitorChannel::getItemValues()},
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* {@link CapacitorChannel::onCreate()} et/ou
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* {@link CapacitorChannel::onUpdate()}
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*
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* @return int 1 si l'objet a été chargé ou mis à jour, 0 s'il existait
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* déjà à l'identique dans le canal
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*/
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function _charge(CapacitorChannel $channel, $item, $func, ?array $args, ?array &$values=null): int {
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$this->_create($channel);
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$tableName = $channel->getTableName();
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$db = $this->db();
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$args ??= [];
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$values = func::call([$channel, "getItemValues"], $item, ...$args);
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if ($values === [false]) return 0;
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$row = cl::merge(
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$channel->getSum("item", $item),
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$this->serialize($channel, $values));
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$prow = null;
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$rowIds = $this->getRowIds($channel, $row, $primaryKeys);
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if ($rowIds !== null) {
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# modification
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$prow = $db->one([
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"select",
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"from" => $tableName,
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"where" => $rowIds,
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]);
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}
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$now = date("Y-m-d H:i:s");
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$insert = null;
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if ($prow === null) {
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# création
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$row = cl::merge($row, [
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"created_" => $now,
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"modified_" => $now,
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]);
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$insert = true;
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$initFunc = func::with([$channel, "onCreate"], $args);
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$values = $this->unserialize($channel, $row);
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$pvalues = null;
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} else {
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# modification
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# intégrer autant que possible les valeurs de prow dans row, de façon que
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# l'utilisateur puisse voir clairement ce qui a été modifié
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if ($channel->_wasSumModified("item", $row, $prow)) {
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$insert = false;
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$row = cl::merge($prow, $row, [
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"modified_" => $now,
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]);
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} else {
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$row = cl::merge($prow, $row);
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}
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$initFunc = func::with([$channel, "onUpdate"], $args);
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$values = $this->unserialize($channel, $row);
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$pvalues = $this->unserialize($channel, $prow);
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}
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$updates = $initFunc->prependArgs([$item, $values, $pvalues])->invoke();
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if ($updates === [false]) return 0;
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if (is_array($updates) && $updates) {
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if ($insert === null) $insert = false;
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if (!array_key_exists("modified_", $updates)) {
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$updates["modified_"] = $now;
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}
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$values = cl::merge($values, $updates);
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$row = cl::merge($row, $this->serialize($channel, $updates));
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}
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if ($func !== null) {
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$updates = func::with($func)
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->prependArgs([$item, $values, $pvalues])
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->bind($channel, true)
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->invoke();
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if ($updates === [false]) return 0;
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if (is_array($updates) && $updates) {
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if ($insert === null) $insert = false;
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if (!array_key_exists("modified_", $updates)) {
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$updates["modified_"] = $now;
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}
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$values = cl::merge($values, $updates);
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$row = cl::merge($row, $this->serialize($channel, $updates));
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}
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}
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# aucune modification
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if ($insert === null) return 0;
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# si on est déjà dans une transaction, désactiver la gestion des transactions
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$manageTransactions = $channel->isManageTransactions() && !$db->inTransaction();
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if ($manageTransactions) {
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$commited = false;
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$db->beginTransaction();
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}
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$nbModified = 0;
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try {
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if ($insert) {
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$id = $db->exec([
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"insert",
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"into" => $tableName,
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"values" => $row,
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]);
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if (count($primaryKeys) == 1 && $rowIds === null) {
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# mettre à jour avec l'id généré
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$values[$primaryKeys[0]] = $id;
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}
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$nbModified = 1;
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} else {
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# calculer ce qui a changé pour ne mettre à jour que le nécessaire
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$updates = [];
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foreach ($row as $col => $value) {
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if (array_key_exists($col, $rowIds)) {
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# ne jamais mettre à jour la clé primaire
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continue;
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}
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$pvalue = $prow[$col] ?? null;
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if ($value !== ($pvalue)) {
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$updates[$col] = $value;
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}
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}
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if (count($updates) == 1 && array_key_first($updates) == "modified_") {
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# si l'unique modification porte sur la date de modification, alors
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# la ligne n'est pas modifiée. ce cas se présente quand on altère la
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# valeur de $item
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$updates = null;
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}
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if ($updates) {
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$db->exec([
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"update",
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"table" => $tableName,
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"values" => $updates,
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"where" => $rowIds,
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]);
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$nbModified = 1;
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}
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}
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if ($manageTransactions) {
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$db->commit();
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$commited = true;
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}
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return $nbModified;
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} finally {
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if ($manageTransactions && !$commited) $db->rollback();
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}
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}
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function charge(?string $channel, $item, $func=null, ?array $args=null, ?array &$values=null): int {
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return $this->_charge($this->getChannel($channel), $item, $func, $args, $values);
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}
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/** décharger les données du canal spécifié */
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function _discharge(CapacitorChannel $channel, bool $reset=true): Traversable {
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$this->_create($channel);
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$rows = $this->db()->all([
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"select item__",
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"from" => $channel->getTableName(),
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]);
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foreach ($rows as $row) {
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yield unserialize($row['item__']);
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}
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if ($reset) $this->_reset($channel);
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}
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function discharge(?string $channel, bool $reset=true): Traversable {
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return $this->_discharge($this->getChannel($channel), $reset);
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}
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protected function _convertValue2row(CapacitorChannel $channel, array $filter, array $cols): array {
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$index = 0;
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$fixed = [];
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foreach ($filter as $key => $value) {
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if ($key === $index) {
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$index++;
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if (is_array($value)) {
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$value = $this->_convertValue2row($channel, $value, $cols);
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}
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$fixed[] = $value;
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} else {
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$col = "${key}__";
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if (array_key_exists($col, $cols)) {
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# colonne sérialisée
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$fixed[$col] = $channel->serialize($value);
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} else {
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$fixed[$key] = $value;
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}
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}
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}
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return $fixed;
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}
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protected function verifixFilter(CapacitorChannel $channel, &$filter): void {
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if ($filter !== null && !is_array($filter)) {
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$primaryKeys = $this->getPrimaryKeys($channel);
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$id = $filter;
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$channel->verifixId($id);
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$filter = [$primaryKeys[0] => $id];
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}
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$cols = $this->ColumnDefinitions($channel);
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if ($filter !== null) {
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$filter = $this->_convertValue2row($channel, $filter, $cols);
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}
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}
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/** indiquer le nombre d'éléments du canal spécifié */
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function _count(CapacitorChannel $channel, $filter): int {
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$this->_create($channel);
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$this->verifixFilter($channel, $filter);
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return $this->db()->get([
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"select count(*)",
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"from" => $channel->getTableName(),
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"where" => $filter,
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]);
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}
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function count(?string $channel, $filter=null): int {
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return $this->_count($this->getChannel($channel), $filter);
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}
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/**
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* obtenir la ligne correspondant au filtre sur le canal spécifié
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*
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* si $filter n'est pas un tableau, il est transformé en ["id_" => $filter]
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*/
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function _one(CapacitorChannel $channel, $filter, ?array $mergeQuery=null): ?array {
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if ($filter === null) throw ValueException::null("filter");
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$this->_create($channel);
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$this->verifixFilter($channel, $filter);
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$row = $this->db()->one(cl::merge([
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"select",
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"from" => $channel->getTableName(),
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"where" => $filter,
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], $mergeQuery));
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return $this->unserialize($channel, $row);
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}
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function one(?string $channel, $filter, ?array $mergeQuery=null): ?array {
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return $this->_one($this->getChannel($channel), $filter, $mergeQuery);
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}
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private function _allCached(string $id, CapacitorChannel $channel, $filter, ?array $mergeQuery=null): Traversable {
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$this->_create($channel);
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$this->verifixFilter($channel, $filter);
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$rows = $this->db()->all(cl::merge([
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"select",
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"from" => $channel->getTableName(),
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"where" => $filter,
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], $mergeQuery), null, $this->getPrimaryKeys($channel));
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if ($channel->isUseCache()) {
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$cacheIds = [$id, get_class($channel)];
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cache::get()->resetCached($cacheIds);
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$rows = cache::new(null, $cacheIds, function() use ($rows) {
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yield from $rows;
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});
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}
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foreach ($rows as $key => $row) {
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yield $key => $this->unserialize($channel, $row);
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}
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}
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/**
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* obtenir les lignes correspondant au filtre sur le canal spécifié
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*
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* si $filter n'est pas un tableau, il est transformé en ["id_" => $filter]
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*/
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function _all(CapacitorChannel $channel, $filter, ?array $mergeQuery=null): Traversable {
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return $this->_allCached("all", $channel, $filter, $mergeQuery);
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}
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function all(?string $channel, $filter, $mergeQuery=null): Traversable {
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return $this->_all($this->getChannel($channel), $filter, $mergeQuery);
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}
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/**
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* appeler une fonction pour chaque élément du canal spécifié.
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*
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* $filter permet de filtrer parmi les élements chargés
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*
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* $func est appelé avec la signature de {@link CapacitorChannel::onEach()}
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* si la fonction retourne un tableau, il est utilisé pour mettre à jour la
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* ligne
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*
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* @param int $nbUpdated reçoit le nombre de lignes mises à jour
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* @return int le nombre de lignes parcourues
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|
*/
|
|
function _each(CapacitorChannel $channel, $filter, $func, ?array $args, ?array $mergeQuery=null, ?int &$nbUpdated=null): int {
|
|
$this->_create($channel);
|
|
if ($func === null) $func = CapacitorChannel::onEach;
|
|
$onEach = func::with($func)->bind($channel, true);
|
|
$db = $this->db();
|
|
# si on est déjà dans une transaction, désactiver la gestion des transactions
|
|
$manageTransactions = $channel->isManageTransactions() && !$db->inTransaction();
|
|
if ($manageTransactions) {
|
|
$commited = false;
|
|
$db->beginTransaction();
|
|
$commitThreshold = $channel->getEachCommitThreshold();
|
|
}
|
|
$count = 0;
|
|
$nbUpdated = 0;
|
|
$tableName = $channel->getTableName();
|
|
try {
|
|
$args ??= [];
|
|
$all = $this->_allCached("each", $channel, $filter, $mergeQuery);
|
|
foreach ($all as $values) {
|
|
$rowIds = $this->getRowIds($channel, $values);
|
|
$updates = $onEach->invoke([$values["item"], $values, ...$args]);
|
|
if (is_array($updates) && $updates) {
|
|
if (!array_key_exists("modified_", $updates)) {
|
|
$updates["modified_"] = date("Y-m-d H:i:s");
|
|
}
|
|
$nbUpdated += $db->exec([
|
|
"update",
|
|
"table" => $tableName,
|
|
"values" => $this->serialize($channel, $updates),
|
|
"where" => $rowIds,
|
|
]);
|
|
if ($manageTransactions && $commitThreshold !== null) {
|
|
$commitThreshold--;
|
|
if ($commitThreshold <= 0) {
|
|
$db->commit();
|
|
$db->beginTransaction();
|
|
$commitThreshold = $channel->getEachCommitThreshold();
|
|
}
|
|
}
|
|
}
|
|
$count++;
|
|
}
|
|
if ($manageTransactions) {
|
|
$db->commit();
|
|
$commited = true;
|
|
}
|
|
return $count;
|
|
} finally {
|
|
if ($manageTransactions && !$commited) $db->rollback();
|
|
}
|
|
}
|
|
|
|
function each(?string $channel, $filter, $func=null, ?array $args=null, ?array $mergeQuery=null, ?int &$nbUpdated=null): int {
|
|
return $this->_each($this->getChannel($channel), $filter, $func, $args, $mergeQuery, $nbUpdated);
|
|
}
|
|
|
|
/**
|
|
* supprimer tous les éléments correspondant au filtre et pour lesquels la
|
|
* fonction retourne une valeur vraie si elle est spécifiée
|
|
*
|
|
* $filter permet de filtrer parmi les élements chargés
|
|
*
|
|
* $func est appelé avec la signature de {@link CapacitorChannel::onDelete()}
|
|
* si la fonction retourne un tableau, il est utilisé pour mettre à jour la
|
|
* ligne
|
|
*
|
|
* @return int le nombre de lignes parcourues
|
|
*/
|
|
function _delete(CapacitorChannel $channel, $filter, $func, ?array $args): int {
|
|
$this->_create($channel);
|
|
if ($func === null) $func = CapacitorChannel::onDelete;
|
|
$onEach = func::with($func)->bind($channel, true);
|
|
$db = $this->db();
|
|
# si on est déjà dans une transaction, désactiver la gestion des transactions
|
|
$manageTransactions = $channel->isManageTransactions() && !$db->inTransaction();
|
|
if ($manageTransactions) {
|
|
$commited = false;
|
|
$db->beginTransaction();
|
|
$commitThreshold = $channel->getEachCommitThreshold();
|
|
}
|
|
$count = 0;
|
|
$tableName = $channel->getTableName();
|
|
try {
|
|
$args ??= [];
|
|
$all = $this->_allCached("delete", $channel, $filter);
|
|
foreach ($all as $values) {
|
|
$rowIds = $this->getRowIds($channel, $values);
|
|
$delete = boolval($onEach->invoke([$values["item"], $values, ...$args]));
|
|
if ($delete) {
|
|
$db->exec([
|
|
"delete",
|
|
"from" => $tableName,
|
|
"where" => $rowIds,
|
|
]);
|
|
if ($manageTransactions && $commitThreshold !== null) {
|
|
$commitThreshold--;
|
|
if ($commitThreshold <= 0) {
|
|
$db->commit();
|
|
$db->beginTransaction();
|
|
$commitThreshold = $channel->getEachCommitThreshold();
|
|
}
|
|
}
|
|
}
|
|
$count++;
|
|
}
|
|
if ($manageTransactions) {
|
|
$db->commit();
|
|
$commited = true;
|
|
}
|
|
return $count;
|
|
} finally {
|
|
if ($manageTransactions && !$commited) $db->rollback();
|
|
}
|
|
}
|
|
|
|
function delete(?string $channel, $filter, $func=null, ?array $args=null): int {
|
|
return $this->_delete($this->getChannel($channel), $filter, $func, $args);
|
|
}
|
|
|
|
abstract function close(): void;
|
|
}
|