mirror of
https://github.com/danog/MadelineProto.git
synced 2024-11-27 06:34:41 +01:00
387 lines
15 KiB
PHP
387 lines
15 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* This file is part of MadelineProto.
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* MadelineProto is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
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* MadelineProto is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU Affero General Public License for more details.
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* You should have received a copy of the GNU General Public License along with MadelineProto.
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* If not, see <http://www.gnu.org/licenses/>.
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*
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* @author Daniil Gentili <daniil@daniil.it>
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* @copyright 2016-2023 Daniil Gentili <daniil@daniil.it>
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* @license https://opensource.org/licenses/AGPL-3.0 AGPLv3
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* @link https://docs.madelineproto.xyz MadelineProto documentation
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*/
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namespace danog\MadelineProto\TL;
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use danog\MadelineProto\Settings\TLSchema;
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/**
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* @internal
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*/
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final class Builder
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{
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/**
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* TL instance.
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*/
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private TL $TL;
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private readonly array $byType;
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private readonly array $idByPredicate;
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private readonly array $typeByPredicate;
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private array $needConstructors = [];
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private array $needVector = [];
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private const RECURSIVE_TYPES = [
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'InputPeer',
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'RichText',
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'PageBlock',
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];
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private $output;
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public function __construct(
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TLSchema $settings,
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/**
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* Output file.
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*/
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string $output,
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/**
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* Output namespace.
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*/
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private string $namespace,
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) {
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$this->output = fopen($output, 'w');
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$this->TL = new TL();
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$this->TL->init($settings);
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$byType = [];
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$idByPredicate = ['vector' => var_export(hex2bin('1cb5c415'), true)];
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foreach ($this->TL->getConstructors()->by_id as $id => $constructor) {
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$byType[$constructor['type']][$id]= $constructor;
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$idByPredicate[$constructor['predicate']] = var_export($id, true);
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$typeByPredicate[$constructor['predicate']] = $constructor['type'];
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}
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$this->byType = $byType;
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$this->idByPredicate = $idByPredicate;
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$this->typeByPredicate = $typeByPredicate;
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}
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private static function escapeConstructorName(array $constructor): string
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{
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return str_replace(['.', ' '], '___', $constructor['predicate']).(isset($constructor['layer']) ?'_'.$constructor['layer'] : '');
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}
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private static function escapeTypeName(string $name): string
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{
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return str_replace(['.', ' '], '___', $name);
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}
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private array $methodsCalled = [];
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private array $methodsCreated = [];
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private function methodCall(string $method): string {
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$this->methodsCalled[$method] = true;
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return $this->methodsCreated[$method]
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? "\$this->$method(\$stream)"
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: "self::$method(\$stream)";
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}
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private function buildParam(array $param): string
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{
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['type' => $type] = $param;
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if (isset($param['subtype'])) {
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$this->needVector[$param['subtype']] = true;
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$type = "array_of_{$param['subtype']}";
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}
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if (($param['name'] ?? null) === 'random_bytes') {
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$type = $param['name'];
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}
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return match ($type) {
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'#' => "unpack('V', stream_get_contents(\$stream, 4))[1]",
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'int' => "unpack('l', stream_get_contents(\$stream, 4))[1]",
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'long' => "unpack('q', stream_get_contents(\$stream, 8))[1]",
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'double' => "unpack('d', stream_get_contents(\$stream, 8))[1]",
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'Bool' => 'match (stream_get_contents($stream, 4)) {'.
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$this->idByPredicate['boolTrue'].' => true,'.
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$this->idByPredicate['boolFalse'].' => false, default => '.$this->methodCall('err').' }',
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'strlong' => 'stream_get_contents($stream, 8)',
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'int128' => 'stream_get_contents($stream, 16)',
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'int256' => 'stream_get_contents($stream, 32)',
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'int512' => 'stream_get_contents($stream, 64)',
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'string', 'bytes', 'waveform', 'random_bytes' =>
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$this->methodCall("deserialize_$type"),
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default => \in_array($type, self::RECURSIVE_TYPES, true) || isset($param['subtype'])
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? $this->methodCall("deserialize_type_{$this->escapeTypeName($type)}")
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: $this->buildTypes($this->byType[$type], $type)
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};
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}
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private function buildConstructorShort(string $predicate, array $params = []): string
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{
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if ($predicate === 'dataJSON') {
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return 'json_decode('.$this->buildParam(['type' => 'string']).', true, 512, \\JSON_THROW_ON_ERROR)';
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}
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if ($predicate === 'jsonNull') {
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return 'null';
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}
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$superBare = $this->typeByPredicate[$predicate] === 'JSONValue'
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|| $this->typeByPredicate[$predicate] === 'Peer';
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$result = '';
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if (!$superBare) {
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$result .= "[\n";
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$result .= "'_' => '$predicate',\n";
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}
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foreach ($params as $param) {
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$name = $param['name'];
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if ($predicate === 'photoStrippedSize'
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&& $name === 'bytes'
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) {
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$code = $this->buildParam(['type' => 'string']);
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$code = "new Types\\Bytes(Tools::inflateStripped($code))";
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$name = 'inflated';
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} else {
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$code = $this->buildParam($param);
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}
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if ($superBare) {
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$result .= $code;
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} else {
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$result .= var_export($name, true)." => $code,\n";
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}
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}
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if (!$superBare) {
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$result .= ']';
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}
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if ($predicate === 'peerChat') {
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$result = "-$result";
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} elseif ($predicate === 'peerChannel') {
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$result = "-1000000000000 - $result";
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}
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return $result;
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}
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private function buildConstructor(string $predicate, array $params, array $flags): string
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{
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if (!$flags) {
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return "return {$this->buildConstructorShort($predicate, $params)};";
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}
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$result = "\$tmp = ['_' => '$predicate'];\n";
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$flagNames = [];
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foreach ($flags as ['flag' => $flag]) {
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$flagNames[$flag] = true;
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}
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foreach ($params as $param) {
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$name = $param['name'];
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if (!isset($param['pow'])) {
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$code = $this->buildParam($param);
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if (isset($flagNames[$name])) {
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$result .= "\$$name = $code;\n";
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} else {
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$result .= "\$tmp['$name'] = $code;\n";
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}
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continue;
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}
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$flag = "(\${$param['flag']} & {$param['pow']}) !== 0";
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if ($param['type'] === 'true') {
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$result .= "\$tmp['$name'] = $flag;\n";
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continue;
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}
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$code = $this->buildParam($param);
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$result .= "if ($flag) \$tmp['$name'] = $code;\n";
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}
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return "$result\nreturn \$tmp;";
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}
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private function buildTypes(array $constructors, ?string $type = null): string
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{
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$typeMethod = $type ? "_type_".self::escapeTypeName($type) : '';
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$result = "match (stream_get_contents(\$stream, 4)) {\n";
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foreach ($constructors as $id => $constructor) {
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[
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'predicate' => $name,
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'flags' => $flags,
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'params' => $params
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] = $constructor;
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if ($name === 'gzip_packed') {
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continue;
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}
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if ($name === 'jsonObjectValue') {
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continue;
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}
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$nameEscaped = self::escapeConstructorName($constructor);
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if (!$flags) {
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$params = $this->buildConstructorShort($name, $params);
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$result .= var_export($id, true)." => $params,\n";
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} else {
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$this->needConstructors[$name] = true;
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$result .= var_export($id, true)." => ".$this->methodCall("deserialize_$nameEscaped").",\n";
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}
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}
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$result .= $this->idByPredicate['gzip_packed']." => ".$this->methodCall("deserialize$typeMethod", 'self::gzdecode($stream)').",\n";
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$result .= "default => self::err(\$stream)\n";
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return $result."}\n";
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}
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private function buildVector(string $type, string $body): void
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{
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$this->m("deserialize_type_array_of_{$this->escapeTypeName($type)}", '
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$stream = match(stream_get_contents(\$stream, 4)) {
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'.$this->idByPredicate['vector'].' => $stream,
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'.$this->idByPredicate['gzip_packed'].' => self::gzdecode_vector($stream)
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};
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$result = [];
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for ($x = unpack("V", stream_get_contents($stream, 4))[1]; $x > 0; --$x) {
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$result []= '.$body.'
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}
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return $result;
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', 'array', static: $type === 'JSONValue');
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}
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private function w(string $data): void {
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fwrite($this->output, $data);
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}
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public function m(string $methodName, string $body, string $returnType = 'mixed', bool $public = false, bool $static = true): void {
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$this->methodsCreated[$methodName] = $static;
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$public = $public ? 'public' : 'private';
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$static = $static ? 'static' : '';
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$this->w(" $public $static function $methodName(mixed \$stream): $returnType {\n{$body}\n }\n");
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}
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public function build(): void
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{
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$this->w("<?php namespace {$this->namespace};\n/** @internal Autogenerated using tools/TL/Builder.php */\nfinal class TLParser {\n");
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$this->m('err', '
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fseek($stream, -4, SEEK_CUR);
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throw new AssertionError("Unexpected ID ".bin2hex(fread($stream, 4)));
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', 'never');
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$this->m("gzdecode", "
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\$res = fopen('php://memory', 'rw+b');
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fwrite(\$res, gzdecode(self::deserialize_string(\$stream)));
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rewind(\$res);
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return \$res;
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");
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$this->m('gzdecode_vector', "
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\$res = fopen('php://memory', 'rw+b');
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fwrite(\$res, gzdecode(self::deserialize_string(\$stream)));
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rewind(\$res);
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return match (stream_get_contents(\$stream, 4)) {
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{$this->idByPredicate['vector']} => \$stream,
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default => self::err(\$stream)
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};
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");
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$block_str = '
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$l = \ord(stream_get_contents($stream, 1));
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if ($l > 254) {
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throw new Exception(Lang::$current_lang["length_too_big"]);
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}
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if ($l === 254) {
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$l = unpack("V", stream_get_contents($stream, 3).\chr(0))[1];
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$x = stream_get_contents($stream, $l);
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$resto = (-$l) % 4;
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$resto = $resto < 0 ? $resto + 4 : $resto;
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if ($resto > 0) {
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stream_get_contents($stream, $resto);
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}
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} else {
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$x = $l ? stream_get_contents($stream, $l) : "";
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$resto = (-$l+1) % 4;
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$resto = $resto < 0 ? $resto + 4 : $resto;
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if ($resto > 0) {
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stream_get_contents($stream, $resto);
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}
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}'."\n";
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$this->m("deserialize_bytes", "
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$block_str
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return new Types\Bytes(\$x);
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");
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$this->m("deserialize_string", "
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$block_str
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return \$x;
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");
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$this->m("deserialize_waveform", "
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$block_str
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return TL::extractWaveform(\$x);
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");
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$this->m('deserialize_random_bytes', '
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$l = \ord(stream_get_contents($stream, 1));
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if ($l > 254) {
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throw new Exception(Lang::$current_lang["length_too_big"]);
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}
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if ($l === 254) {
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$l = unpack("V", stream_get_contents($stream, 3).\chr(0))[1];
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if ($l < 15) {
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throw new SecurityException("Random_bytes is too small!");
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}
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} else {
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if ($l < 15) {
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throw new SecurityException("Random_bytes is too small!");
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}
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$l += 1;
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}
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$resto = (-$l) % 4;
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$resto = $resto < 0 ? $resto + 4 : $resto;
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if ($resto > 0) {
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$l += $resto;
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}
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stream_get_contents($stream, $l);
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', 'void');
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$this->m('deserialize_type_array_of_JSONObjectValue', '
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$stream = match(stream_get_contents($stream, 4)) {
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'.$this->idByPredicate["vector"].' => $stream,
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'.$this->idByPredicate["gzip_packed"].' => self::gzdecode_vector($stream)
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};
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$result = [];
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for ($x = unpack("V", stream_get_contents($stream, 4))[1]; $x > 0; --$x) {
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$result['.$this->buildParam(['type' => 'string']).'] = '.$this->buildParam(['type' => 'JSONValue']).';
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}
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return $result;
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', 'array');
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$initial_constructors = array_filter(
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$this->TL->getConstructors()->by_id,
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fn (array $arr) => $arr['type'] === 'Update'
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|| $arr['predicate'] === 'rpc_result'
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|| !$arr['encrypted']
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);
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$this->m("deserialize", "return {$this->buildTypes($initial_constructors)};", 'mixed', true, static: false);
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foreach ($this->TL->getConstructors()->by_id as $id => $constructor) {
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['predicate' => $name, 'flags' => $flags, 'params' => $params, 'type' => $type] = $constructor;
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if ($name === 'jsonObjectValue') {
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continue;
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}
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if ($name === 'dataJSON') {
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continue;
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}
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if ($type === 'JSONValue') {
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continue;
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}
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if ($name === 'gzip_packed') {
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continue;
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}
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$nameEscaped = self::escapeConstructorName($constructor);
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$this->m("deserialize_$nameEscaped", $this->buildConstructor($name, $params, $flags));
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}
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foreach ($this->byType as $type => $constructors) {
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if ($type === 'JSONObjectValue') {
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continue;
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}
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$this->m(
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"deserialize_type_{$this->escapeTypeName($type)}",
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"return {$this->buildTypes($constructors, $type)};",
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static: $type === 'JSONValue'
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);
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if (isset($this->needVector[$type])) {
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$this->buildVector($type, $this->buildTypes($constructors, "array_of_$type"));
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}
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}
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foreach (['int', 'long', 'double', 'strlong'] as $type) {
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$this->buildVector($type, $this->buildParam(['type' => $type]));
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}
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$this->w("}\n");
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}
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}
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