MIF_E31220442/app/Http/Controllers/AlgoritmaController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Models\Alternatif;
use App\Models\Kriteria;
use App\Models\Penilaian;
use PDF;
use Carbon\Carbon;

class AlgoritmaController extends Controller
{
    public function __construct()
    {
        return $this->middleware('auth');
    }

    public function index()
    {
       
        $alternatif = Alternatif::with('penilaian.crips')->get();
        $kriteria = Kriteria::with('crips')->orderBy('nama_kriteria','ASC')->get();
        $penilaian = Penilaian::with('crips','alternatif')->get();
         if (count($penilaian) == 0) {
             return redirect(route('penilaian.index'))->with('empty','Data Kosong Silahkan Isi Terlbih Dahulu');
         }
        
        //mencari min max normalisasi
        foreach ($kriteria as $key => $value) {
            foreach ($penilaian as $key_1 => $value_1) {
                if ($value->id == $value_1->crips->kriteria_id)
                {
                    if ($value->attribut == 'Benefit') {
                        $minMax[$value->id][] = $value_1->crips->bobot;
                    }elseif ($value->attribut == 'Cost') {
                        $minMax[$value->id][] = $value_1->crips->bobot;
                    }
                }
            }
        }

        //Normalisasi
       
        foreach ($penilaian as $key_1 => $value_1) {
            foreach ($kriteria as $key => $value) {
                if ($value->id == $value_1->crips->kriteria_id) {
                    if ($value->attribut == 'Benefit') {
                        $normalisasi[$value_1->alternatif->nama_alternatif][$value->id] = $value_1->crips->bobot / max($minMax[$value->id]);
                    }elseif ($value->attribut == 'Cost') {
                        $normalisasi[$value_1->alternatif->nama_alternatif][$value->id] = min($minMax[$value->id]) / $value_1->crips->bobot;
                    }
                }
            }
        }


        // Perangkingan
        foreach ($normalisasi as $key => $value) {
            foreach ($kriteria as $key_1 => $value_1) {
                $rank[$key][] = $value[$value_1->id] * $value_1->bobot;
            }
        }
        

        $ranking = $normalisasi;
        foreach ($normalisasi as $key => $value) {
            $ranking[$key][] = array_sum($rank[$key]);
        }
   //     arsort($ranking);

        $sortedData = collect($ranking)->sortByDesc(function ($value) {
            return array_sum($value);
        })->toArray();
        
       // dd($sortedData);
        return view('admin.perhitungan.index', compact('alternatif','kriteria','normalisasi','sortedData'));
       
    }







    public function downloadPDF() {
        setlocale(LC_ALL, 'IND');
        $tanggal = Carbon::now()->formatLocalized('%A, %d %B %Y');
        $alternatif = Alternatif::with('penilaian.crips')->get();
        $kriteria = Kriteria::with('crips')->orderBy('nama_kriteria','ASC')->get();
        $penilaian = Penilaian::with('crips','alternatif')->get();


        if (count($penilaian) == 0) {
            return redirect(route('penilaian.index'));
        }
        //mencari min max normalisasi
        foreach ($kriteria as $key => $value) {
            foreach ($penilaian as $key_1 => $value_1) {
                if ($value->id == $value_1->crips->kriteria_id)
                {
                    if ($value->attribut == 'Benefit') {
                        $minMax[$value->id][] = $value_1->crips->bobot;
                    }elseif ($value->attribut == 'Cost') {
                        $minMax[$value->id][] = $value_1->crips->bobot;
                    }
                }
            }
        }

        //Normalisasi
       
        foreach ($penilaian as $key_1 => $value_1) {
            foreach ($kriteria as $key => $value) {
                if ($value->id == $value_1->crips->kriteria_id) {
                    if ($value->attribut == 'Benefit') {
                        $normalisasi[$value_1->alternatif->nama_alternatif][$value->id] = $value_1->crips->bobot / max($minMax[$value->id]);
                    }elseif ($value->attribut == 'Cost') {
                        $normalisasi[$value_1->alternatif->nama_alternatif][$value->id] = min($minMax[$value->id]) / $value_1->crips->bobot;
                    }
                }
            }
        }


        // Perangkingan
        foreach ($normalisasi as $key => $value) {
            foreach ($kriteria as $key_1 => $value_1) {
                $rank[$key][] = $value[$value_1->id] * $value_1->bobot;
            }
        }
        $ranking = $normalisasi;
        foreach ($normalisasi as $key => $value) {
            $ranking[$key][] = array_sum($rank[$key]);
        }
        
     //   arsort($ranking);

     $sortedData = collect($ranking)->sortByDesc(function ($value) {
        return array_sum($value);
    })->toArray();


        $pdf = PDF::loadView('admin.perhitungan.perhitungan-pdf',compact('alternatif','kriteria','normalisasi','sortedData','tanggal'));
        $pdf->setPaper('A3', 'potrait');
        return $pdf->stream('perhitungan.pdf');
    }
}