ConfiguredReadOnlyMode.php

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<?php
 
class ConfiguredReadOnlyMode {
    private $reason;
 
    private $reasonFile;
 
    public function __construct( $reason, $reasonFile = null ) {
        if ( $reason instanceof Config ) {
            // Before 1.34 we passed a whole Config object, which was overkill
            wfDeprecated( __METHOD__ . ' with Config passed to constructor', '1.34' );
            $reason = $reason->get( 'ReadOnly' );
            $reasonFile = $reason->get( 'ReadOnlyFile' );
        }
        $this->reason = $reason;
        $this->reasonFile = $reasonFile;
    }
 
    public function isReadOnly() {
        return $this->getReason() !== false;
    }
 
    public function getReason() {
        if ( $this->reason !== null ) {
            return $this->reason;
        }
        if ( $this->reasonFile === null ) {
            return false;
        }
        // Try the reason file
        if ( is_file( $this->reasonFile ) && filesize( $this->reasonFile ) > 0 ) {
            $this->reason = file_get_contents( $this->reasonFile );
        }
        // No need to try the reason file again
        $this->reasonFile = null;
        return $this->reason ?? false;
    }
 
    public function setReason( $msg ) {
        $this->reason = $msg;
    }
}