Started working on chapters

app/Repos/ChapterRepo.php

@@ -0,0 +1,65 @@
+<?php namespace Oxbow\Repos;
+
+
+use Illuminate\Support\Str;
+use Oxbow\Chapter;
+
+class ChapterRepo
+{
+
+    protected $chapter;
+
+    /**
+     * ChapterRepo constructor.
+     * @param $chapter
+     */
+    public function __construct(Chapter $chapter)
+    {
+        $this->chapter = $chapter;
+    }
+
+    public function getById($id)
+    {
+        return $this->chapter->findOrFail($id);
+    }
+
+    public function getAll()
+    {
+        return $this->chapter->all();
+    }
+
+    public function getBySlug($slug, $bookId)
+    {
+        return $this->chapter->where('slug', '=', $slug)->where('book_id', '=', $bookId)->first();
+    }
+
+    public function newFromInput($input)
+    {
+        return $this->chapter->fill($input);
+    }
+
+    public function destroyById($id)
+    {
+        $page = $this->getById($id);
+        $page->delete();
+    }
+
+    public function doesSlugExist($slug, $bookId, $currentId = false)
+    {
+        $query = $this->chapter->where('slug', '=', $slug)->where('book_id', '=', $bookId);
+        if($currentId) {
+            $query = $query->where('id', '!=', $currentId);
+        }
+        return $query->count() > 0;
+    }
+
+    public function findSuitableSlug($name, $bookId)
+    {
+        $slug = Str::slug($name);
+        while($this->doesSlugExist($slug, $bookId)) {
+            $slug .= '-' . substr(md5(rand(1, 500)), 0, 3);
+        }
+        return $slug;
+    }
+
+}