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Post.php
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Post.php
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<?php
/*
* This file is part of Flarum.
*
* (c) Toby Zerner <toby.zerner@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Flarum\Core;
use DomainException;
use Flarum\Core\Post\RegisteredTypesScope;
use Flarum\Event\PostWasDeleted;
use Flarum\Database\AbstractModel;
use Flarum\Core\User;
use Flarum\Core\Support\Locked;
use Flarum\Core\Support\ScopeVisibilityTrait;
use Flarum\Core\Support\EventGeneratorTrait;
use Flarum\Core\Support\ValidateBeforeSaveTrait;
use Illuminate\Database\Eloquent\Builder;
/**
* @property int $id
* @property int $discussion_id
* @property int $number
* @property \Carbon\Carbon $time
* @property int|null $user_id
* @property string|null $type
* @property string|null $content
* @property \Carbon\Carbon|null $edit_time
* @property int|null $edit_user_id
* @property \Carbon\Carbon|null $hide_time
* @property int|null $hide_user_id
* @property \Flarum\Core\Discussion|null $discussion
* @property User|null $user
* @property User|null $editUser
* @property User|null $hideUser
*/
class Post extends AbstractModel
{
use EventGeneratorTrait;
use ScopeVisibilityTrait;
/**
* {@inheritdoc}
*/
protected $table = 'posts';
/**
* {@inheritdoc}
*/
protected $dates = ['time', 'edit_time', 'hide_time'];
/**
* A map of post types, as specified in the `type` column, to their
* classes.
*
* @var array
*/
protected static $models = [];
/**
* The type of post this is, to be stored in the posts table.
*
* Should be overwritten by subclasses with the value that is
* to be stored in the database, which will then be used for
* mapping the hydrated model instance to the proper subtype.
*
* @var string
*/
public static $type = '';
/**
* {@inheritdoc}
*/
public static function boot()
{
parent::boot();
// When a post is created, set its type according to the value of the
// subclass. Also give it an auto-incrementing number within the
// discussion.
static::creating(function (Post $post) {
$post->type = $post::$type;
$post->number = ++$post->discussion->number_index;
$post->discussion->save();
});
// Don't allow the first post in a discussion to be deleted, because
// it doesn't make sense. The discussion must be deleted instead.
static::deleting(function (Post $post) {
if ($post->number == 1) {
throw new DomainException('Cannot delete the first post of a discussion');
}
});
static::deleted(function (Post $post) {
$post->raise(new PostWasDeleted($post));
});
static::addGlobalScope(new RegisteredTypesScope);
}
/**
* Determine whether or not this post is visible to the given user.
*
* @param User $user
* @return boolean
*/
public function isVisibleTo(User $user)
{
$discussion = $this->discussion()->whereVisibleTo($user)->first();
if ($discussion) {
$this->setRelation('discussion', $discussion);
return (bool) $discussion->postsVisibleTo($user)->where('id', $this->id)->count();
}
return false;
}
/**
* Define the relationship with the post's discussion.
*
* @return \Illuminate\Database\Eloquent\Relations\BelongsTo
*/
public function discussion()
{
return $this->belongsTo('Flarum\Core\Discussion', 'discussion_id');
}
/**
* Define the relationship with the post's author.
*
* @return \Illuminate\Database\Eloquent\Relations\BelongsTo
*/
public function user()
{
return $this->belongsTo('Flarum\Core\User', 'user_id');
}
/**
* Define the relationship with the user who edited the post.
*
* @return \Illuminate\Database\Eloquent\Relations\BelongsTo
*/
public function editUser()
{
return $this->belongsTo('Flarum\Core\User', 'edit_user_id');
}
/**
* Define the relationship with the user who hid the post.
*
* @return \Illuminate\Database\Eloquent\Relations\BelongsTo
*/
public function hideUser()
{
return $this->belongsTo('Flarum\Core\User', 'hide_user_id');
}
/**
* Get all posts, regardless of their type, by removing the
* `RegisteredTypesScope` global scope constraints applied on this model.
*
* @param Builder $query
* @return Builder
*/
public function scopeAllTypes(Builder $query)
{
return $this->removeGlobalScopes($query);
}
/**
* Create a new model instance according to the post's type.
*
* @param array $attributes
* @param string|null $connection
* @return static|object
*/
public function newFromBuilder($attributes = [], $connection = null)
{
$attributes = (array) $attributes;
if (! empty($attributes['type'])
&& isset(static::$models[$attributes['type']])
&& class_exists($class = static::$models[$attributes['type']])
) {
/** @var Post $instance */
$instance = new $class;
$instance->exists = true;
$instance->setRawAttributes($attributes, true);
$instance->setConnection($connection ?: $this->connection);
return $instance;
}
return parent::newFromBuilder($attributes, $connection);
}
/**
* Get the type-to-model map.
*
* @return array
*/
public static function getModels()
{
return static::$models;
}
/**
* Set the model for the given post type.
*
* @param string $type The post type.
* @param string $model The class name of the model for that type.
* @return void
*/
public static function setModel($type, $model)
{
static::$models[$type] = $model;
}
}