X-Git-Url: http://source.bookstackapp.com/bookstack/blobdiff_plain/8b550991a4dbcd7a05e08e8f600b5444d5f4004d..refs/pull/2334/head:/app/Entities/BookChild.php

diff --git a/app/Entities/BookChild.php b/app/Entities/BookChild.php
index c76baf29a..6eac4375d 100644
--- a/app/Entities/BookChild.php
+++ b/app/Entities/BookChild.php
@@ -1,14 +1,31 @@
 <?php namespace BookStack\Entities;
 
+use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
 /**
  * Class BookChild
  * @property int $book_id
+ * @property int $priority
+ * @property Book $book
+ * @method Builder whereSlugs(string $bookSlug, string $childSlug)
  */
 class BookChild extends Entity
 {
 
+    /**
+     * Scope a query to find items where the the child has the given childSlug
+     * where its parent has the bookSlug.
+     */
+    public function scopeWhereSlugs(Builder $query, string $bookSlug, string $childSlug)
+    {
+        return $query->with('book')
+            ->whereHas('book', function (Builder $query) use ($bookSlug) {
+                $query->where('slug', '=', $bookSlug);
+            })
+            ->where('slug', '=', $childSlug);
+    }
+
     /**
      * Get the book this page sits in.
      * @return BelongsTo
@@ -18,4 +35,26 @@ class BookChild extends Entity
         return $this->belongsTo(Book::class);
     }
 
-}
\ No newline at end of file
+    /**
+     * Change the book that this entity belongs to.
+     */
+    public function changeBook(int $newBookId): Entity
+    {
+        $this->book_id = $newBookId;
+        $this->refreshSlug();
+        $this->save();
+        $this->refresh();
+
+        // Update related activity
+        $this->activity()->update(['book_id' => $newBookId]);
+
+        // Update all child pages if a chapter
+        if ($this instanceof Chapter) {
+            foreach ($this->pages as $page) {
+                $page->changeBook($newBookId);
+            }
+        }
+
+        return $this;
+    }
+}