Parser for discord permission int returned by the API, and an implementation of their Snowflake IDs.

PermissionParser.php

<?php

namespace Ollieread\Discord\Support;

/**
 * Class PermissionCalculator
 *
 * @package Ollieread\Discord\Support
 */
class PermissionParser
{
    /**
     * @var array
     */
    protected static $permissions = [
        'CREATE_INSTANT_INVITE' => 0x00000001,
        'KICK_MEMBERS'          => 0x00000002,
        'BAN_MEMBERS'           => 0x00000004,
        'ADMINISTRATOR'         => 0x00000008,
        'MANAGE_CHANNELS'       => 0x00000010,
        'MANAGE_GUILD'          => 0x00000020,
        'ADD_REACTIONS'         => 0x00000040,
        'VIEW_AUDIT_LOG'        => 0x00000080,
        'VIEW_CHANNEL'          => 0x00000400,
        'SEND_MESSAGES'         => 0x00000800,
        'SEND_TTS_MESSAGES'     => 0x00001000,
        'MANAGE_MESSAGES'       => 0x00002000,
        'EMBED_LINKS'           => 0x00004000,
        'ATTACH_FILES'          => 0x00008000,
        'READ_MESSAGE_HISTORY'  => 0x00010000,
        'MENTION_EVERYONE'      => 0x00020000,
        'USE_EXTERNAL_EMOJIS'   => 0x00040000,
        'CONNECT'               => 0x00100000,
        'SPEAK'                 => 0x00200000,
        'MUTE_MEMBERS'          => 0x00400000,
        'DEAFEN_MEMBERS'        => 0x00800000,
        'MOVE_MEMBERS'          => 0x01000000,
        'USE_VAD'               => 0x02000000,
        'CHANGE_NICKNAME'       => 0x04000000,
        'MANAGE_NICKNAMES'      => 0x08000000,
        'MANAGE_ROLES'          => 0x10000000,
        'MANAGE_WEBHOOKS'       => 0x20000000,
        'MANAGE_EMOJIS'         => 0x40000000,
    ];

    /**
     * Parse a permission int to an array of useable permissions.
     *
     * @param int $permissions
     *
     * @return array
     */
    public static function toArray(int $permissions): array
    {
        $parsedPermissions = [];

        foreach (self::$permissions as $permission => $value) {
            $parsedPermissions[$permission] = (bool)($permissions & $value);
        }

        return $parsedPermissions;
    }

    /**
     * Parse a permission array to an int for sending over the API.
     *
     * @param array $permissions
     *
     * @return int
     */
    public static function toInt(array $permissions): int
    {
        $parsedPermissions = 0;

        foreach ($permissions as $permission => $presence) {
            $permission = strtoupper($permission);

            if ($presence && array_key_exists($permission, self::$permissions)) {
                $parsedPermissions |= self::$permissions[$permission];
            }
        }

        return $parsedPermissions;
    }

    /**
     * Check whether a given permission exists.
     *
     * @param string $permission
     *
     * @return bool
     */
    public static function exists(string $permission): bool
    {
        return array_key_exists(strtoupper($permission), self::$permissions);
    }
}

Snowflake.php

<?php

namespace Ollieread\Discord\Support;

class Snowflake
{
    /**
     * @var string
     */
    protected $id;

    /**
     * @var int
     */
    protected $timestamp;

    /**
     * @var int
     */
    protected $workerId;

    /**
     * @var int
     */
    protected $processId;

    /**
     * @var int
     */
    protected $increment;

    public function __construct(string $id)
    {
        $this->id        = $id;
        $this->timestamp = ($this->id >> 22) + 1420070400000;
        $this->workerId  = ($this->id & 0x3E0000) >> 17;
        $this->processId = ($this->id & 0x1F000) >> 12;
        $this->increment = $this->id & 0xFFF;
    }

    /**
     * @return string
     */
    public function getId(): string
    {
        return $this->id;
    }

    /**
     * @return int
     */
    public function getTimestamp(): int
    {
        return $this->timestamp;
    }

    /**
     * @return int
     */
    public function getWorkerId(): int
    {
        return $this->workerId;
    }

    /**
     * @return int
     */
    public function getProcessId(): int
    {
        return $this->processId;
    }

    /**
     * @return int
     */
    public function getIncrement(): int
    {
        return $this->increment;
    }

    public function __toString()
    {
        return $this->id;
    }
}