<?php

declare(strict_types = 1);

// {{{ License

// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social.  If not, see <http://www.gnu.org/licenses/>.

// }}}

namespace App\Entity;

use App\Core\DB;
use App\Core\Entity;
use Component\Notification\Entity\Attention;
use Component\Notification\Entity\Notification;
use DateTimeInterface;
use Functional as F;

/**
 * Entity for all activities we know about
 *
 * @category  DB
 * @package   GNUsocial
 *
 * @author    Hugo Sales <hugo@hsal.es>
 * @author    Diogo Peralta Cordeiro <@diogo.site>
 * @copyright 2020-2021 Free Software Foundation, Inc http://www.fsf.org
 * @license   https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
 */
class Activity extends Entity
{
    // {{{ Autocode
    // @codeCoverageIgnoreStart
    private int $id;
    private int $actor_id;
    private string $verb;
    private string $object_type;
    private int $object_id;
    private ?string $source = null;
    private \DateTimeInterface $created;

    public function setId(int $id): self
    {
        $this->id = $id;
        return $this;
    }

    public function getId(): int
    {
        return $this->id;
    }

    public function setActorId(int $actor_id): self
    {
        $this->actor_id = $actor_id;
        return $this;
    }

    public function getActorId(): int
    {
        return $this->actor_id;
    }

    public function setVerb(string $verb): self
    {
        $this->verb = \mb_substr($verb, 0, 32);
        return $this;
    }

    public function getVerb(): string
    {
        return $this->verb;
    }

    public function setObjectType(string $object_type): self
    {
        $this->object_type = \mb_substr($object_type, 0, 32);
        return $this;
    }

    public function getObjectType(): string
    {
        return $this->object_type;
    }

    public function setObjectId(int $object_id): self
    {
        $this->object_id = $object_id;
        return $this;
    }

    public function getObjectId(): int
    {
        return $this->object_id;
    }

    public function setSource(?string $source): self
    {
        $this->source = \is_null($source) ? null : \mb_substr($source, 0, 32);
        return $this;
    }

    public function getSource(): ?string
    {
        return $this->source;
    }

    public function setCreated(\DateTimeInterface $created): self
    {
        $this->created = $created;
        return $this;
    }

    public function getCreated(): \DateTimeInterface
    {
        return $this->created;
    }

    // @codeCoverageIgnoreEnd
    // }}} Autocode

    public function getActor(): Actor
    {
        return Actor::getById($this->getActorId());
    }

    public function getObject(): mixed
    {
        return DB::findOneBy($this->getObjectType(), ['id' => $this->getObjectId()]);
    }

    /**
     * Actors that should be informed about this object.
     *
     * @return array int[] of Actor's id
     */
    public function getAttentionTargetIds(): array
    {
        $answer = [];
        switch($this->getVerb()) {
            case 'undo':
                $answer = $this->getObject()->getAttentionTargetIds();
                break;
            case 'create':
                $object_attention = $this->getObject()->getAttentionTargetIds();
                foreach ($object_attention as $att) {
                    $answer[$att] = $att;
                }
                // no break
            default:
                $attention = DB::findBy(Attention::class, [
                    'object_type' => static::schemaName(),
                    'object_id' => $this->getId(),
                ]);
                foreach ($attention as $att) {
                    $answer[$att->getTargetId()] = $att->getTargetId();
                }
        }
        return $answer;
    }

    public static function getAllActivitiesByActor(Actor $actor): array
    {
        return DB::findBy(self::class, ['actor_id' => $actor->getId()], order_by: ['created' => 'DESC', 'id' => 'DESC']);
    }

    public static function schemaDef(): array
    {
        return [
            'name'   => 'activity',
            'fields' => [
                'id'          => ['type' => 'serial',   'not null' => true],
                'actor_id'    => ['type' => 'int',      'not null' => true, 'description' => 'foreign key to actor table'],
                'verb'        => ['type' => 'varchar',  'length' => 32,     'not null' => true, 'description' => 'internal activity verb, influenced by activity pub verbs'],
                'object_type' => ['type' => 'varchar',  'length' => 32,     'not null' => true, 'description' => 'the name of the table this object refers to'],
                'object_id'   => ['type' => 'int',      'not null' => true, 'description' => 'id in the referenced table'],
                'source'      => ['type' => 'varchar',  'length' => 32,     'description' => 'the source of this activity'],
                'created'     => ['type' => 'datetime', 'not null' => true, 'description' => 'date this record was created',  'default' => 'CURRENT_TIMESTAMP'],
            ],
            'primary key' => ['id'],
        ];
    }
}