cdb.php

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<?php
use \Cdb\Exception as CdbException;
use \Cdb\Reader as CdbReader;

require_once __DIR__ . '/commandLine.inc';

function cdbShowHelp( $command ) {
    $commandList = [
        'load' => 'load a cdb file for reading',
        'get' => 'get a value for a key',
        'exit' => 'exit cdb',
        'quit' => 'exit cdb',
        'help' => 'help about a command',
    ];
    if ( !$command ) {
        $command = 'fullhelp';
    }
    if ( $command === 'fullhelp' ) {
        $max_cmd_len = max( array_map( 'strlen', array_keys( $commandList ) ) );
        foreach ( $commandList as $cmd => $desc ) {
            printf( "%-{$max_cmd_len}s: %s\n", $cmd, $desc );
        }
    } elseif ( isset( $commandList[$command] ) ) {
        print "$command: $commandList[$command]\n";
    } else {
        print "$command: command does not exist or no help for it\n";
    }
}

do {
    $bad = false;
    $showhelp = false;
    $quit = false;
    static $fileHandle = false;

    $line = Maintenance::readconsole();
    if ( $line === false ) {
        exit;
    }

    $args = explode( ' ', $line, 2 );
    $command = array_shift( $args );

    // process command
    switch ( $command ) {
        case 'help':
            // show an help message
            cdbShowHelp( array_shift( $args ) );
            break;
        case 'load':
            if ( !isset( $args[0] ) ) {
                print "Need a filename there buddy\n";
                break;
            }
            $file = $args[0];
            print "Loading cdb file $file...";
            try {
                $fileHandle = CdbReader::open( $file );
            } catch ( CdbException $e ) {
            }

            if ( !$fileHandle ) {
                print "not a cdb file or unable to read it\n";
            } else {
                print "ok\n";
            }
            break;
        case 'get':
            if ( !$fileHandle ) {
                print "Need to load a cdb file first\n";
                break;
            }
            if ( !isset( $args[0] ) ) {
                print "Need to specify a key, Luke\n";
                break;
            }
            try {
                $res = $fileHandle->get( $args[0] );
            } catch ( CdbException $e ) {
                print "Unable to read key from file\n";
                break;
            }
            if ( $res === false ) {
                print "No such key/value pair\n";
            } elseif ( is_string( $res ) ) {
                print "$res\n";
            } else {
                var_dump( $res );
            }
            break;
        case 'quit':
        case 'exit':
            $quit = true;
            break;

        default:
            $bad = true;
    } // switch() end

    if ( $bad ) {
        if ( $command ) {
            print "Bad command\n";
        }
    } else {
        if ( function_exists( 'readline_add_history' ) ) {
            readline_add_history( $line );
        }
    }
} while ( !$quit );