431 lines
11 KiB
PHP
431 lines
11 KiB
PHP
<?php
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namespace danog\MadelineProto\Db;
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use Amp\Loop;
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use Amp\Mysql\Pool;
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use Amp\Producer;
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use Amp\Promise;
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use Amp\Sql\ResultSet;
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use danog\MadelineProto\Logger;
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use function Amp\call;
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use function Amp\Promise\wait;
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class MysqlArray implements DbArray
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{
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use ArrayCacheTrait;
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private string $table;
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private array $settings;
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private Pool $db;
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private ?string $key = null;
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private $current;
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public function __serialize(): array
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{
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return [
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'table' => $this->table,
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'settings' => $this->settings
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];
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}
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public function __unserialize($data): void
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{
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foreach ($data as $property => $value) {
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$this->{$property} = $value;
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}
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try {
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$this->db = static::getDbConnection($this->settings);
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} catch (\Throwable $e) {
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Logger::log($e->getMessage(), Logger::ERROR);
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}
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}
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public static function getInstance(string $name, $value, string $tablePrefix, array $settings): DbType
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{
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$instance = new static();
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$instance->table = "{$tablePrefix}_{$name}";
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$instance->settings = $settings;
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$instance->db = static::getDbConnection($settings);
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$instance->ttl = $settings['cache_ttl'] ?? $instance->ttl;
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if ($value instanceof static) {
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if ($instance->table !== $value->table) {
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$instance->renameTable($value->table, $instance->table);
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}
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}
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$instance->prepareTable();
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Loop::defer(function() use($value, $instance){
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if (!empty($value) && !$value instanceof static) {
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Logger::log('Converting database.', Logger::ERROR);
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if ($value instanceof DbArray) {
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$value = $value->getArrayCopy();
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}
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$value = (array) $value;
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$counter = 0;
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$total = count($value);
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foreach ((array) $value as $key => $item) {
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$counter++;
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if ($counter % 100 === 0) {
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yield $instance->offsetSetAsync($key, $item);
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Logger::log("Converting database. $counter/$total", Logger::WARNING);
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} else {
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$instance->offsetSetAsync($key, $item);
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}
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}
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Logger::log('Converting database done.', Logger::ERROR);
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}
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});
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return $instance;
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}
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/**
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* Check if offset exists
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*
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* @link https://php.net/manual/en/arrayiterator.offsetexists.php
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*
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* @param string $index <p>
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* The offset being checked.
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* </p>
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*
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* @return bool true if the offset exists, otherwise false
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* @throws \Throwable
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*/
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public function offsetExists($index)
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{
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return $this->offsetGet($index) !== null;
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}
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/**
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* Get value for an offset
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*
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* @link https://php.net/manual/en/arrayiterator.offsetget.php
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*
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* @param string $index <p>
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* The offset to get the value from.
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* </p>
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*
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* @return mixed The value at offset <i>index</i>.
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* @throws \Throwable
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*/
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public function offsetGet($index)
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{
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return wait($this->offsetGetAsync($index));
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}
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public function offsetGetAsync(string $offset): Promise
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{
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return call(function() use($offset) {
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if ($cached = $this->getCache($offset)) {
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return $cached;
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}
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$row = yield $this->request(
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"SELECT `value` FROM {$this->table} WHERE `key` = :index LIMIT 1",
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['index' => $offset]
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);
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if ($value = $this->getValue($row)) {
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$this->setCache($offset, $value);
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}
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return $value;
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});
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}
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/**
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* Set value for an offset
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*
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* @link https://php.net/manual/en/arrayiterator.offsetset.php
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*
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* @param string $index <p>
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* The index to set for.
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* </p>
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* @param $value
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*
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* @return void
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* @throws \Throwable
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*/
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public function offsetSet($index, $value)
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{
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wait($this->offsetSetAsync($index, $value));
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}
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public function offsetSetAsync($index, $value): Promise
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{
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$this->setCache($index, $value);
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return $this->request("
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INSERT INTO `{$this->table}`
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SET `key` = :index, `value` = :value
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ON DUPLICATE KEY UPDATE `value` = :value
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",
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[
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'index' => $index,
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'value' => serialize($value),
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]
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);
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}
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/**
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* Unset value for an offset
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*
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* @link https://php.net/manual/en/arrayiterator.offsetunset.php
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*
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* @param string $index <p>
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* The offset to unset.
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* </p>
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*
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* @return void
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* @throws \Throwable
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*/
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public function offsetUnset($index)
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{
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$this->unsetCache($index);
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$this->syncRequest("
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DELETE FROM `{$this->table}`
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WHERE `key` = :index
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",
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['index' => $index]
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);
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}
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/**
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* Get array copy
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*
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* @link https://php.net/manual/en/arrayiterator.getarraycopy.php
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* @return array A copy of the array, or array of public properties
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* if ArrayIterator refers to an object.
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* @throws \Throwable
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*/
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public function getArrayCopy(): array
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{
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$rows = $this->syncRequest("SELECT `key`, `value` FROM {$this->table}");
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$result = [];
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foreach ($rows as $row) {
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$result[$row['key']] = unserialize($row['value']);
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}
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return $result;
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}
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public function getIterator(): Producer
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{
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return new Producer(function (callable $emit) {
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$request = yield $this->db->execute("SELECT `key`, `value` FROM {$this->table}");
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while (yield $request->advance()) {
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$row = $request->getCurrent();
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yield $emit($this->getValue($row));
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}
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});
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}
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/**
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* Count elements
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*
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* @link https://php.net/manual/en/arrayiterator.count.php
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* @return int The number of elements or public properties in the associated
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* array or object, respectively.
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* @throws \Throwable
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*/
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public function count(): int
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{
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$row = $this->syncRequest("SELECT count(`key`) as `count` FROM {$this->table}");
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return $row[0]['count'] ?? 0;
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}
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/**
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* Rewind array back to the start
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*
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* @link https://php.net/manual/en/arrayiterator.rewind.php
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* @return void
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* @throws \Throwable
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*/
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public function rewind()
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{
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$this->key = null;
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$this->key();
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$this->current = null;
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}
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/**
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* Return current array entry
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*
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* @link https://php.net/manual/en/arrayiterator.current.php
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* @return mixed The current array entry.
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* @throws \Throwable
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*/
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public function current()
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{
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return $this->current ?: $this->offsetGet($this->key());
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}
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private function getValue(array $row)
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{
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if ($row) {
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if (!empty($row[0]['value'])) {
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$row = reset($row);
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}
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return unserialize($row['value']);
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}
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return null;
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}
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/**
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* Return current array key
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*
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* @link https://php.net/manual/en/arrayiterator.key.php
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* @return string|float|int|bool|null The current array key.
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* @throws \Throwable
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*/
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public function key(): ?string
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{
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if ($this->key === null) {
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$row = $this->syncRequest(
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"SELECT `key` FROM {$this->table} ORDER BY `key` LIMIT 1"
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);
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$this->key = $row[0]['key'] ?? null;
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}
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return $this->key;
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}
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/**
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* Move to next entry
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*
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* @link https://php.net/manual/en/arrayiterator.next.php
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* @return void
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* @throws \Throwable
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*/
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public function next()
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{
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$row = $this->syncRequest(
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"SELECT `key`, `value` FROM {$this->table} WHERE `key` > :key ORDER BY `key` LIMIT 1",
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['key' => $this->key()]
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);
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$this->key = $row[0]['key'] ?? null;
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$this->current = $this->getValue($row);
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}
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/**
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* Check whether array contains more entries
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*
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* @link https://php.net/manual/en/arrayiterator.valid.php
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* @return bool
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* @throws \Throwable
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*/
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public function valid():bool
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{
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return $this->key !== null;
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}
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/**
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* Seek to position
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* @link https://php.net/manual/en/arrayiterator.seek.php
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* @param int $position <p>
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* The position to seek to.
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* </p>
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* @return void
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*/
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public function seek($position)
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{
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$row = $this->syncRequest(
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"SELECT `key` FROM {$this->table} ORDER BY `key` LIMIT 1 OFFSET :position",
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['offset' => $position]
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);
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$this->key = $row[0]['key'] ?? $this->key;
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}
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public static function getDbConnection(array $settings): Pool
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{
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return Mysql::getConnection(
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$settings['host'],
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$settings['port'],
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$settings['user'],
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$settings['password'],
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$settings['database'],
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);
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}
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/**
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* Create table for property
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*
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* @return array|null
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* @throws \Throwable
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*/
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private function prepareTable()
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{
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return $this->syncRequest("
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CREATE TABLE IF NOT EXISTS `{$this->table}`
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(
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`key` VARCHAR(255) NOT NULL,
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`value` MEDIUMBLOB NULL,
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`ts` TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
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PRIMARY KEY (`key`)
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)
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");
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}
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private function renameTable(string $from, string $to)
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{
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try {
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$this->syncRequest("
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ALTER TABLE {$from} RENAME TO {$to};
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");
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} catch (\Throwable $e) {
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Logger::log("Cant rename table {$from} to {$to}", Logger::WARNING);
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}
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}
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/**
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* Perform blocking request to db
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*
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* @param string $query
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* @param array $params
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*
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* @return array|null
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* @throws \Throwable
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*/
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private function syncRequest(string $query, array $params = []): array
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{
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return wait($this->request($query, $params));
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}
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/**
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* Perform blocking request to db
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*
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* @param string $query
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* @param array $params
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*
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* @return Promise
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* @throws \Throwable
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*/
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private function request(string $query, array $params = []): Promise
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{
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return call(function() use($query, $params) {
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if (empty($this->db)) {
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return [];
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}
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$request = yield $this->db->execute($query, $params);
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$result = [];
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if ($request instanceof ResultSet) {
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while (yield $request->advance()) {
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$result[] = $request->getCurrent();
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}
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}
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return $result;
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});
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}
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} |