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<?php
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namespace App\Http\Controllers;
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use App\ArtefactUser;
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use App\User;
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use Illuminate\Http\Request;
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use App\Metadata;
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use App\Artefact;
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use Illuminate\Support\Facades\Auth;
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class DetailsController extends Controller
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{
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    const ORDER_COLUMN = 'page';
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    public function __construct()
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    {
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        $this->middleware('auth');
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    }
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    /**
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     * Display a listing of the resource.
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     *
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     * @return \Illuminate\Http\Response
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     */
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    public function index()
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    {
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        $data = array(
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            'title' => 'Welcome to the MERLOT page',
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        );
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        //return view('index', compact('title'));
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        return view('index') -> with($data);
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    }
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    /**
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     * Display the specified resource.
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     *
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     * @param  int  $id
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     * @return \Illuminate\Contracts\View\Factory|\Illuminate\View\View
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     */
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    public function show($id)
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    {
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        if (is_null(Artefact::find($id)))
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        {
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            return view('detail.index', ['metadata' => []]);
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        }
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        $metadata = Artefact::find($id)->metadata()->orderBy(self::ORDER_COLUMN)->get();
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        foreach($metadata as $item)
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        {
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            $item['favourite'] = is_null(User::find(Auth::id())->likesMetadata()->find($item->id)) ? false : true;
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        }
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        return view('detail.index', ['metadata' => $metadata]);
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    }
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    /**
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     * Likes metadata given by its id.
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     *
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     * @param $id int id of metadata
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     * @return \Illuminate\Http\RedirectResponse
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     */
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    public function like($id)
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    {
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        $user = User::find(Auth::id());
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        $metadata = Metadata::find($id);
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        $user->likesMetadata()->attach($metadata);
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        return back()->withInput();
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    }
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    /**
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     * Unlikes metadata given by its id.
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     *
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     * @param $id int id of metadata
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     * @return \Illuminate\Http\RedirectResponse
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     */
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    public function unlike($id)
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    {
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        $user = User::find(Auth::id());
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        $metadata = Metadata::find($id);
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        $user->likesMetadata()->detach($metadata);
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        return back()->withInput();
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    }
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}
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