GenerateFancyCaptchas.php

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<?php
if ( getenv( 'MW_INSTALL_PATH' ) ) {
    $IP = getenv( 'MW_INSTALL_PATH' );
} else {
    $IP = __DIR__ . '/../../..';
}
 
require_once "$IP/maintenance/Maintenance.php";
 
class GenerateFancyCaptchas extends Maintenance {
    public function __construct() {
        parent::__construct();
 
        // See captcha.py for argument usage
        $this->addOption( "wordlist", 'A list of words', true, true );
        $this->addOption( "font", "The font to use", true, true );
        $this->addOption( "font-size", "The font size ", false, true );
        $this->addOption( "blacklist", "A blacklist of words that should not be used", false, true );
        $this->addOption( "fill", "Fill the captcha container to N files", true, true );
        $this->addOption( "verbose", "Show debugging information" );
        $this->addOption(
            "oldcaptcha",
            "Whether to use captcha-old.py which doesn't have OCR fighting improvements"
        );
        $this->addOption( "delete", "Delete the old captches" );
        $this->addOption( "threads", "The number of threads to use to generate the images",
            false, true );
        $this->mDescription = "Generate new fancy captchas and move them into storage";
 
        $this->requireExtension( "FancyCaptcha" );
    }
 
    public function execute() {
        global $wgCaptchaSecret, $wgCaptchaDirectoryLevels;
 
        $totalTime = -microtime( true );
 
        $instance = ConfirmEditHooks::getInstance();
        if ( !( $instance instanceof FancyCaptcha ) ) {
            $this->error( "\$wgCaptchaClass is not FancyCaptcha.\n", 1 );
        }
        $backend = $instance->getBackend();
 
        $deleteOldCaptchas = $this->getOption( 'delete' );
 
        $countGen = (int)$this->getOption( 'fill' );
        if ( !$deleteOldCaptchas ) {
            $countAct = $instance->getCaptchaCount();
            $this->output( "Current number of captchas is $countAct.\n" );
            $countGen -= $countAct;
        }
 
        if ( $countGen <= 0 ) {
            $this->output( "No need to generate anymore captchas.\n" );
            return;
        }
 
        $tmpDir = wfTempDir() . '/mw-fancycaptcha-' . time() . '-' . wfRandomString( 6 );
        if ( !wfMkdirParents( $tmpDir ) ) {
            $this->error( "Could not create temp directory.\n", 1 );
        }
 
        $captchaScript = 'captcha.py';
 
        if ( $this->hasOption( 'oldcaptcha' ) ) {
            $captchaScript = 'captcha-old.py';
        }
 
        $cmd = sprintf( "python %s --key %s --output %s --count %s --dirs %s",
            wfEscapeShellArg( dirname( __DIR__ ) . '/' . $captchaScript ),
            wfEscapeShellArg( $wgCaptchaSecret ),
            wfEscapeShellArg( $tmpDir ),
            wfEscapeShellArg( $countGen ),
            wfEscapeShellArg( $wgCaptchaDirectoryLevels )
        );
        foreach (
            [ 'wordlist', 'font', 'font-size', 'blacklist', 'verbose', 'threads' ] as $par
        ) {
            if ( $this->hasOption( $par ) ) {
                $cmd .= " --$par " . wfEscapeShellArg( $this->getOption( $par ) );
            }
        }
 
        $this->output( "Generating $countGen new captchas.." );
        $retVal = 1;
        $captchaTime = -microtime( true );
        wfShellExec( $cmd, $retVal, [], [ 'time' => 0 ] );
        if ( $retVal != 0 ) {
            wfRecursiveRemoveDir( $tmpDir );
            $this->error( "Could not run generation script.\n", 1 );
        }
 
        $captchaTime += microtime( true );
        $this->output( " Done.\n" );
 
        $this->output(
            sprintf(
                "\nGenerated %d captchas in %.1f seconds\n",
                $countGen,
                $captchaTime
            )
        );
 
        $filesToDelete = [];
        if ( $deleteOldCaptchas ) {
            $this->output( "Getting a list of old captchas to delete..." );
            $path = $backend->getRootStoragePath() . '/captcha-render';
            foreach ( $backend->getFileList( [ 'dir' => $path ] ) as $file ) {
                $filesToDelete[] = [
                    'op' => 'delete',
                    'src' => $path . '/' . $file,
                ];
            }
            $this->output( " Done.\n" );
        }
 
        $this->output( "Copying the new captchas to storage..." );
 
        $storeTime = -microtime( true );
        $iter = new RecursiveIteratorIterator(
            new RecursiveDirectoryIterator(
                $tmpDir,
                FilesystemIterator::SKIP_DOTS
            ),
            RecursiveIteratorIterator::LEAVES_ONLY
        );
 
        $captchasGenerated = iterator_count( $iter );
        $filesToStore = [];
        foreach ( $iter as $fileInfo ) {
            if ( !$fileInfo->isFile() ) {
                continue;
            }
            list( $salt, $hash ) = $instance->hashFromImageName( $fileInfo->getBasename() );
            $dest = $instance->imagePath( $salt, $hash );
            $backend->prepare( [ 'dir' => dirname( $dest ) ] );
            $filesToStore[] = [
                'op' => 'store',
                'src' => $fileInfo->getPathname(),
                'dst' => $dest,
            ];
        }
 
        $ret = $backend->doQuickOperations( $filesToStore );
 
        $storeTime += microtime( true );
 
        $storeSucceeded = true;
        if ( $ret->isOK() ) {
            $this->output( " Done.\n" );
            $this->output(
                sprintf(
                    "\nCopied %d captchas to storage in %.1f seconds\n",
                    $ret->successCount,
                    $storeTime
                )
            );
            if ( !$ret->isGood() ) {
                $this->output(
                    "Non fatal errors:\n" .
                    Status::wrap( $ret )->getWikiText( null, null, 'en' ) .
                    "\n"
                );
            }
            if ( $ret->failCount ) {
                $storeSucceeded = false;
                $this->error( sprintf( "\nFailed to copy %d captchas\n", $ret->failCount ) );
            }
            if ( $ret->successCount + $ret->failCount !== $captchasGenerated ) {
                $storeSucceeded = false;
                $this->error(
                    sprintf( "Internal error: captchasGenerated: %d, successCount: %d, failCount: %d\n",
                        $captchasGenerated, $ret->successCount, $ret->failCount
                    )
                );
            }
        } else {
            $storeSucceeded = false;
            $this->output( "Errored.\n" );
            $this->error(
                Status::wrap( $ret )->getWikiText( null, null, 'en' ) .
                "\n"
            );
        }
 
        if ( $storeSucceeded && $deleteOldCaptchas ) {
            $numOriginalFiles = count( $filesToDelete );
            $this->output( "Deleting {$numOriginalFiles} old captchas...\n" );
            $deleteTime = -microtime( true );
            $ret = $backend->doQuickOperations( $filesToDelete );
 
            $deleteTime += microtime( true );
            if ( $ret->isOK() ) {
                $this->output( "Done.\n" );
                $this->output(
                    sprintf(
                        "\nDeleted %d old captchas in %.1f seconds\n",
                        $numOriginalFiles,
                        $deleteTime
                    )
                );
                if ( !$ret->isGood() ) {
                    $this->output(
                        "Non fatal errors:\n" .
                        Status::wrap( $ret )->getWikiText( null, null, 'en' ) .
                        "\n"
                    );
                }
            } else {
                $this->output( "Errored.\n" );
                $this->error(
                    Status::wrap( $ret )->getWikiText( null, null, 'en' ) .
                    "\n"
                );
            }
 
        }
        $this->output( "Removing temporary files..." );
        wfRecursiveRemoveDir( $tmpDir );
        $this->output( " Done.\n" );
 
        $totalTime += microtime( true );
        $this->output(
            sprintf(
                "\nWhole captchas generation process took %.1f seconds\n",
                $totalTime
            )
        );
    }
}
 
$maintClass = GenerateFancyCaptchas::class;
require_once RUN_MAINTENANCE_IF_MAIN;