<?php
/**
 * Pterodactyl - Panel
 * Copyright (c) 2015 - 2017 Dane Everitt <dane@daneeveritt.com>.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

namespace Pterodactyl\Models;

use Hash;
use Google2FA;
use Illuminate\Auth\Authenticatable;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Notifications\Notifiable;
use Pterodactyl\Exceptions\DisplayException;
use Illuminate\Auth\Passwords\CanResetPassword;
use Illuminate\Foundation\Auth\Access\Authorizable;
use Illuminate\Contracts\Auth\Authenticatable as AuthenticatableContract;
use Illuminate\Contracts\Auth\Access\Authorizable as AuthorizableContract;
use Illuminate\Contracts\Auth\CanResetPassword as CanResetPasswordContract;
use Pterodactyl\Notifications\SendPasswordReset as ResetPasswordNotification;

class User extends Model implements AuthenticatableContract, AuthorizableContract, CanResetPasswordContract
{
    use Authenticatable, Authorizable, CanResetPassword, Notifiable;

    /**
     * The rules for user passwords.
     *
     * @var string
     */
    const PASSWORD_RULES = 'regex:((?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{8,})';

    /**
     * The regex rules for usernames.
     *
     * @var string
     */
    const USERNAME_RULES = 'regex:/^([\w\d\.\-]{1,255})$/';

    /**
     * The table associated with the model.
     *
     * @var string
     */
    protected $table = 'users';

    /**
     * A list of mass-assignable variables.
     *
     * @var [type]
     */
    protected $fillable = ['username', 'email', 'name_first', 'name_last', 'password', 'language', 'use_totp', 'totp_secret', 'gravatar', 'root_admin'];

     /**
      * Cast values to correct type.
      *
      * @var array
      */
     protected $casts = [
         'root_admin' => 'integer',
         'use_totp' => 'integer',
         'gravatar' => 'integer',
     ];

    /**
     * The attributes excluded from the model's JSON form.
     *
     * @var array
     */
    protected $hidden = ['password', 'remember_token', 'totp_secret'];

    /**
     * Enables or disables TOTP on an account if the token is valid.
     *
     * @param int $token The token that we want to verify.
     * @return bool
     */
    public function toggleTotp($token)
    {
        if (! Google2FA::verifyKey($this->totp_secret, $token, 1)) {
            return false;
        }

        $this->use_totp = ! $this->use_totp;
        $this->save();

        return true;
    }

    /**
     * Set a user password to a new value assuming it meets the following requirements:
     *      - 8 or more characters in length
     *      - at least one uppercase character
     *      - at least one lowercase character
     *      - at least one number.
     *
     * @param string $password The raw password to set the account password to.
     * @param string $regex The regex to use when validating the password. Defaults to '((?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{8,})'.
     * @return void
     */
    public function setPassword($password, $regex = '((?=.*\d)(?=.*[a-z])(?=.*[A-Z]).{8,})')
    {
        if (! preg_match($regex, $password)) {
            throw new DisplayException('The password passed did not meet the minimum password requirements.');
        }

        $this->password = Hash::make($password);
        $this->save();
    }

    /**
     * Send the password reset notification.
     *
     * @param  string  $token
     * @return void
     */
    public function sendPasswordResetNotification($token)
    {
        $this->notify(new ResetPasswordNotification($token));
    }

    /**
     * Return true or false depending on wether the user is root admin or not.
     *
     * @return bool the user is root admin
     */
    public function isRootAdmin()
    {
        return $this->root_admin === 1;
    }

    /**
     * Returns the user's daemon secret for a given server.
     * @param  Server $server \Pterodactyl\Models\Server
     * @return null|string
     */
    public function daemonToken(Server $server)
    {
        if ($this->id === $server->owner_id || $this->isRootAdmin()) {
            return $server->daemonSecret;
        }

        $subuser = Subuser::where('server_id', $server->id)->where('user_id', $this->id)->first();

        if (is_null($subuser)) {
            return null;
        }

        return $subuser->daemonSecret;
    }

    /**
     * Returns an array of all servers a user is able to access.
     * Note: does not account for user admin status.
     *
     * @return array
     */
    public function serverAccessArray()
    {
        $union = Subuser::select('server_id')->where('user_id', $this->id);

        return Server::select('id')->where('owner_id', $this->id)->union($union)->pluck('id')->all();
    }

    /**
     * Returns an array of all servers a user is able to access.
     * Note: does not account for user admin status.
     *
     * @return Collection
     */
    public function serverAccessCollection($paginate = null)
    {
        $query = Server::with('service', 'node');
        if (! $this->isRootAdmin()) {
            $query->whereIn('id', $this->serverAccessArray());
        }

        return (is_numeric($paginate)) ? $query->paginate($paginate) : $query->get();
    }

    /**
     * Returns all permissions that a user has.
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function permissions()
    {
        return $this->hasMany(Permission::class);
    }

    /**
     * Returns all servers that a user owns.
     *
     * @return \Illuminate\Database\Eloquent\Relations\HasMany
     */
    public function servers()
    {
        return $this->hasMany(Server::class, 'owner_id');
    }
}