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<?php /** * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html / namespace Cdb; /* * @internal For use by bin/cdb only. / final class Cli { /* @var int $exitCode / private $exitCode = 0; /* @var resource $out / private $out; /* @var string $self / private $self; /* @var string $filepath / private $filepath; /* @var string $action / private $action; /* @var string[] $params / private $params; /* * @param resource $out An open output handle for fwrite() * @param string[] $argv / public function __construct( $out, array $argv ) { $this->out = $out; $this->self = $argv[0] ?? './bin/cdb'; $this->filepath = $argv[1] ?? ''; $this->action = $argv[2] ?? ''; $this->params = array_slice( $argv, 3 ); } /* Main method. / public function run() { try { switch ( $this->action ) { case 'get': $this->runGet(); break; case 'list': $this->runList(); break; case 'match': $this->runMatch(); break; default: $this->exitCode = 1; $this->help(); break; } } catch ( \Throwable $e ) { $this->exitCode = 1; $this->output( $e ); } } private function runGet(): void { if ( count( $this->params ) !== 1 ) { $this->error( "The 'get' action requires one parameter." ); return; } $key = $this->params[0]; $dbr = Reader::open( $this->filepath ); $value = $dbr->get( $key ); if ( $value == false ) { $this->error( "Key '$key' not found." ); return; } $this->output( $value ); } private function runList(): void { if ( count( $this->params ) > 1 ) { $this->error( "The 'list' action accepts only one parameter." ); return; } $max = (int)( $this->params[0] ?? '100' ); $dbr = Reader::open( $this->filepath ); $key = $dbr->firstkey(); $count = 0; while ( $key !== false && $count < $max ) { $this->output( $key ); $count++; $key = $dbr->nextkey(); } if ( $count === $max && $key !== false ) { $this->output( "\n(more keys exist…)" ); } } private function runMatch(): void { if ( count( $this->params ) !== 1 ) { $this->error( "The 'match' action requires one parameter." ); return; } $pattern = $this->params[0]; if ( preg_match( $pattern, '' ) === false ) { $this->error( 'Invalid regular expression pattern.' ); return; } $dbr = Reader::open( $this->filepath ); $key = $dbr->firstkey(); while ( $key !== false ) { if ( preg_match( $pattern, $key ) ) { $this->output( $key ); } $key = $dbr->nextkey(); } } private function help(): void { $this->output( <<<TEXT usage: {$this->self} <file> [<action>=list] [<parameters...>] actions: get <key> Get the value for a given key. list [<max>=100] List all keys in the file match <pattern> List keys matching a regular expression. The pattern must include delimiters (e.g. / or #). TEXT ); } private function error( string $text ): void { $this->exitCode = 1; $this->output( "\nerror: $text\n------\n" ); $this->help(); } private function output( string $text ): void { fwrite( $this->out, $text . "\n" ); } /* * Get exit status code for the process. * * @return int */ public function getExitCode(): int { return $this->exitCode; } }

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