<?php

// {{{ 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\Cache;
use App\Core\DB\DB;
use App\Core\Entity;
use App\Core\Event;
use App\Core\VisibilityScope;
use DateTimeInterface;

/**
 * Entity for notices
 *
 * @category  DB
 * @package   GNUsocial
 *
 * @author    Hugo Sales <hugo@hsal.es>
 * @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 Note extends Entity
{
    // {{{ Autocode
    private int $id;
    private int $gsactor_id;
    private ?string $content;
    private ?string $rendered;
    private ?int $reply_to;
    private ?bool $is_local;
    private ?string $source;
    private ?int $conversation;
    private ?int $repeat_of;
    private int $scope = 1;
    private DateTimeInterface $created;
    private DateTimeInterface $modified;

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

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

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

    public function getGSActorId(): int
    {
        return $this->gsactor_id;
    }

    public function setContent(?string $content): self
    {
        $this->content = $content;
        return $this;
    }

    public function getContent(): ?string
    {
        return $this->content;
    }

    public function setRendered(?string $rendered): self
    {
        $this->rendered = $rendered;
        return $this;
    }

    public function getRendered(): ?string
    {
        return $this->rendered;
    }

    public function setReplyTo(?int $reply_to): self
    {
        $this->reply_to = $reply_to;
        return $this;
    }

    public function getReplyTo(): ?int
    {
        return $this->reply_to;
    }

    public function setIsLocal(?bool $is_local): self
    {
        $this->is_local = $is_local;
        return $this;
    }

    public function getIsLocal(): ?bool
    {
        return $this->is_local;
    }

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

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

    public function setConversation(?int $conversation): self
    {
        $this->conversation = $conversation;
        return $this;
    }

    public function getConversation(): ?int
    {
        return $this->conversation;
    }

    public function setRepeatOf(?int $repeat_of): self
    {
        $this->repeat_of = $repeat_of;
        return $this;
    }

    public function getRepeatOf(): ?int
    {
        return $this->repeat_of;
    }

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

    public function getScope(): int
    {
        return $this->scope;
    }

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

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

    public function setModified(DateTimeInterface $modified): self
    {
        $this->modified = $modified;
        return $this;
    }

    public function getModified(): DateTimeInterface
    {
        return $this->modified;
    }

    // }}} Autocode

    public function getActorNickname()
    {
        return GSActor::getNicknameFromId($this->gsactor_id);
    }

    public function getAvatarUrl()
    {
        $url = null;
        Event::handle('GetAvatarUrl', [$this->getActorNickname(), &$url]);
        return $url;
    }
    public static function getAllNotes(int $noteScope): array
    {
        return DB::sql('select * from note n ' .
            'where n.reply_to is null and (n.scope & :notescope) <> 0 ' .
            'order by n.created DESC',
            ['n'         => 'App\Entity\Note'],
            ['notescope' => $noteScope]
        );
    }

    public function getAttachments(): array
    {
        return Cache::get('note-attachments-' . $this->id, function () {
            return DB::dql(
                    'select att from App\Entity\Attachment att ' .
                    'join App\Entity\AttachmentToNote atn with atn.attachment_id = att.id ' .
                    'where atn.note_id = :note_id',
                    ['note_id' => $this->id]
                );
        });
    }

    public function getReplies(): array
    {
        return Cache::getList('note-replies-' . $this->id, function () {
            return DB::dql('select n from App\Entity\Note n where n.reply_to = :id', ['id' => $this->id]);
        });
    }

    public function getReplyToNickname(): ?string
    {
        if (!empty($this->reply_to)) {
            return Cache::get('note-reply-to-' . $this->id, function () {
                return DB::dql('select g from App\Entity\Note n join ' .
                                   'App\Entity\GSActor g with n.gsactor_id = g.id where n.reply_to = :reply',
                                   ['reply' => $this->reply_to])[0]->getNickname();
            });
        }
        return null;
    }

    /**
     * Whether this note is visible to the given actor
     *
     * @param mixed $a
     */
    public function isVisibleTo(/* GSActor|LocalUser */ $a): bool
    {
        $scope = VisibilityScope::create($this->scope);
        return $scope->public
            || ($scope->follower
                && null != DB::find('follow', ['follower' => $a->getId(), 'followed' => $this->gsactor_id]))
            || ($scope->addressee
                && null != DB::find('notification', ['activity_id' => $this->id, 'gsactor_id' => $a->getId()]))
            || ($scope->group
                && [] != DB::sql('select m.gsactor_id from group_member m ' .
                                   'inner join group_inbox i on m.group_id = i.group_id ' .
                                   'inner join note n on i.activity_id = n.id where n.id = :id',
                                   [], ['id' => $this->id]));
    }

    public static function schemaDef(): array
    {
        return [
            'name'   => 'note',
            'fields' => [
                'id'           => ['type' => 'serial',    'not null' => true],
                'gsactor_id'   => ['type' => 'int',       'foreign key' => true, 'target' => 'GSActor.id', 'multiplicity' => 'one to one', 'not null' => true, 'description' => 'who made the note'],
                'content'      => ['type' => 'text',      'description' => 'note content'],
                'rendered'     => ['type' => 'text',      'description' => 'rendered note content, so we can keep the microtags (if not local)'],
                'reply_to'     => ['type' => 'int',       'foreign key' => true, 'target' => 'Note.id', 'multiplicity' => 'one to one', 'description' => 'note replied to, null if root of a conversation'],
                'is_local'     => ['type' => 'bool',      'description' => 'was this note generated by a local actor'],
                'source'       => ['type' => 'varchar',   'foreign key' => true, 'length' => 32, 'target' => 'NoteSource.code', 'multiplicity' => 'many to one', 'description' => 'fkey to source of note, like "web", "im", or "clientname"'],
                'conversation' => ['type' => 'int',       'foreign key' => true, 'target' => 'Conversation.id', 'multiplicity' => 'one to one', 'description' => 'the local conversation id'],
                'repeat_of'    => ['type' => 'int',       'foreign key' => true, 'target' => 'Note.id', 'multiplicity' => 'one to one', 'description' => 'note this is a repeat of'],
                'scope'        => ['type' => 'int',       'not null' => true, 'default' => VisibilityScope::PUBLIC, 'description' => 'bit map for distribution scope; 0 = everywhere; 1 = this server only; 2 = addressees; 4 = groups; 8 = followers; 16 = messages; null = default'],
                'created'      => ['type' => 'datetime',  'not null' => true, 'default' => 'CURRENT_TIMESTAMP', 'description' => 'date this record was created'],
                'modified'     => ['type' => 'timestamp', 'not null' => true, 'default' => 'CURRENT_TIMESTAMP', 'description' => 'date this record was modified'],
            ],
            'primary key' => ['id'],
            'indexes'     => [
                'note_created_id_is_local_idx'      => ['created', 'is_local'],
                'note_gsactor_created_idx'          => ['gsactor_id', 'created'],
                'note_is_local_created_gsactor_idx' => ['is_local', 'created', 'gsactor_id'],
                'note_repeat_of_created_idx'        => ['repeat_of', 'created'],
                'note_conversation_created_idx'     => ['conversation', 'created'],
                'note_reply_to_idx'                 => ['reply_to'],
            ],
            'fulltext indexes' => ['notice_fulltext_idx' => ['content']],
        ];
    }
}