BookStack/app/PageRevision.php

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<?php namespace BookStack;
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class PageRevision extends Model
{
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protected $fillable = ['name', 'html', 'text', 'markdown', 'summary'];
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/**
* Get the user that created the page revision
* @return \Illuminate\Database\Eloquent\Relations\BelongsTo
*/
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public function createdBy()
{
return $this->belongsTo(User::class, 'created_by');
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}
/**
* Get the page this revision originates from.
* @return \Illuminate\Database\Eloquent\Relations\BelongsTo
*/
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public function page()
{
return $this->belongsTo(Page::class);
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}
/**
* Get the url for this revision.
* @param null|string $path
* @return string
*/
public function getUrl($path = null)
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{
$url = $this->page->getUrl() . '/revisions/' . $this->id;
if ($path) {
return $url . '/' . trim($path, '/');
}
return $url;
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}
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/**
* Get the previous revision for the same page if existing
* @return \BookStack\PageRevision|null
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*/
public function getPrevious()
{
if ($id = static::where('page_id', '=', $this->page_id)->where('id', '<', $this->id)->max('id')) {
return static::find($id);
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}
return null;
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}
/**
* Allows checking of the exact class, Used to check entity type.
* Included here to align with entities in similar use cases.
* (Yup, Bit of an awkward hack)
* @param $type
* @return bool
*/
public static function isA($type)
{
return $type === 'revision';
}
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}