<?php

namespace App\Models;

use App\Models\Concerns\NotificationContext;
use App\Models\Concerns\Reportable;
use Illuminate\Database\Eloquent\Model;

/**
 * A data table object (referencing changesets and rows)
 */
class Table extends Model
{
    use Reportable;

    protected static function boot()
    {
        parent::boot();

        static::deleting(function(Table $self) {
            // update refcounts
            $self->revisions()->decrement('refs');
        });
    }

    /** Owning user */
    public function owner()
    {
        return $this->belongsTo(User::class, 'owner_id');
    }

    /** Fork precursor */
    public function parentTable()
    {
        return $this->belongsTo(Table::class, 'ancestor_id');
    }

    /** Fork descendants */
    public function forks()
    {
        return $this->hasMany(Table::class, 'ancestor_id');
    }

    /** All related revisions (this may include merged revisions) */
    public function revisions()
    {
        return $this->belongsToMany(Revision::class, 'table_revision_pivot');
    }

    /** Active revision */
    public function activeRevision()
    {
        return $this->hasOne(Revision::class, 'revision_id');
    }

    /** Proposals submitted to this table */
    public function proposals()
    {
        return $this->hasMany(Proposal::class);
    }

    /** User-submitted comments */
    public function comments()
    {
        return $this->hasMany(TableComment::class);
    }

    /** Users favouriting this table */
    public function favouritingUsers()
    {
        return $this->belongsToMany(User::class, 'table_favourites');
    }

    /** Users to notify about comments */
    public function discussionFollowers()
    {
        return $this->belongsToMany(User::class, 'discussion_follows');
    }
}