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Editing: Metadata.php

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<?php

namespace MaxMind\Db\Reader;

/**
 * This class provides the metadata for the MaxMind DB file.
 *
 * @property int nodeCount This is an unsigned 32-bit integer indicating
 * the number of nodes in the search tree.
 * @property int recordSize This is an unsigned 16-bit integer. It
 * indicates the number of bits in a record in the search tree. Note that each
 * node consists of two records.
 * @property int ipVersion This is an unsigned 16-bit integer which is
 * always 4 or 6. It indicates whether the database contains IPv4 or IPv6
 * address data.
 * @property string databaseType This is a string that indicates the structure
 * of each data record associated with an IP address. The actual definition of
 * these structures is left up to the database creator.
 * @property array languages An array of strings, each of which is a language
 * code. A given record may contain data items that have been localized to
 * some or all of these languages. This may be undefined.
 * @property int binaryFormatMajorVersion This is an unsigned 16-bit
 * integer indicating the major version number for the database's binary
 * format.
 * @property int binaryFormatMinorVersion This is an unsigned 16-bit
 * integer indicating the minor version number for the database's binary format.
 * @property int buildEpoch This is an unsigned 64-bit integer that
 * contains the database build timestamp as a Unix epoch value.
 * @property array description This key will always point to a map
 * (associative array). The keys of that map will be language codes, and the
 * values will be a description in that language as a UTF-8 string. May be
 * undefined for some databases.
 */
class Metadata
{
    private $binaryFormatMajorVersion;
    private $binaryFormatMinorVersion;
    private $buildEpoch;
    private $databaseType;
    private $description;
    private $ipVersion;
    private $languages;
    private $nodeByteSize;
    private $nodeCount;
    private $recordSize;
    private $searchTreeSize;

public function __construct($metadata)
    {
        $this->binaryFormatMajorVersion =
            $metadata['binary_format_major_version'];
        $this->binaryFormatMinorVersion =
            $metadata['binary_format_minor_version'];
        $this->buildEpoch = $metadata['build_epoch'];
        $this->databaseType = $metadata['database_type'];
        $this->languages = $metadata['languages'];
        $this->description = $metadata['description'];
        $this->ipVersion = $metadata['ip_version'];
        $this->nodeCount = $metadata['node_count'];
        $this->recordSize = $metadata['record_size'];
        $this->nodeByteSize = $this->recordSize / 4;
        $this->searchTreeSize = $this->nodeCount * $this->nodeByteSize;
    }

public function __get($var)
    {
        return $this->$var;
    }
}

Editing: Metadata.php

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