qds/app/Services/StickerPdfService.php

<?php

namespace App\Services;

use App\Models\StickerDetail;
use App\Models\StickerStructureDetail;
use TCPDF;
use Illuminate\Http\Response;


class StickerPdfService
{
    public function generate(string $stickerId, array $elements)
    {

        $structure = StickerStructureDetail::where('sticker_id', $stickerId)
            ->first();

        $stickerId = $structure->sticker_id;

        $elements = StickerDetail::where('sticker_structure_detail_id', $stickerId)->get();

        $width  = (float) $structure->sticker_width;
        $height = (float) $structure->sticker_height;

        $pdf = new TCPDF('P', 'mm', [$width, $height], true, 'UTF-8', false);

        // $pdf->SetMargins(
        //     (float) $structure->sticker_lmargin,
        //     (float) $structure->sticker_tmargin,
        //     (float) $structure->sticker_rmargin,
        // );

        // //$pdf->SetAutoPageBreak(false, (float) $structure->sticker_bmargin);
        // $pdf->SetAutoPageBreak(false, (float) $structure->sticker_bmargin);

        $pdf->setPrintHeader(false);
        $pdf->setPrintFooter(false);
        // $pdf->setCellPaddings(0, 0, 0, 0);
        $pdf->setCellMargins(5, 5, 5, 5);

        // Set margins
        $pdf->SetMargins(5, 5, 5); // left, top, right
        // $pdf->SetAutoPageBreak(false, 0); // bottom = 0

        $pdf->SetMargins(
            (float) $structure->sticker_lmargin,
            (float) $structure->sticker_tmargin,
            (float) $structure->sticker_rmargin,
            (float) $structure->sticker_bmargin,
        );

        //$pdf->SetAutoPageBreak(false, (float) $structure->sticker_bmargin);
        //$pdf->SetAutoPageBreak(false, (float) $structure->sticker_bmargin);


        //dd($pdf->getMargins());

        $pdf->AddPage();

        $pdf->SetFont('helvetica', 'B', 10); // font, style, size in points

        // // 📍 ADD TEXT: 3mm from left, 10mm from top
        // $pdf->Text(3, 10, 'Sticker ID: ' . $stickerId);

        // // Optional: add more text
        // $pdf->SetFont('helvetica', '', 8);
        // $pdf->Text(45, 45, 'Batch: X1');
        // $pdf->Text(3, 20, '✓ Valid');


        foreach ($elements as $row) {

            switch ($row->design_element_type) {

                case 'Text':
                    $pdf->SetFont(
                        $row->string_font ?? 'helvetica',
                        '',
                        (int) ($row->string_size ?? 10)
                    );
                    $pdf->SetTextColor(...$this->hexToRgb($row->element_colour ?? '#000000'));
                    $pdf->Text(
                        (float) ($row->string_x_value ?? 0),
                        (float) ($row->string_y_value ?? 0),
                        $row->string_value ?? ''
                    );
                    break;

                case 'QR':
                    $pdf->write2DBarcode(
                        $row->qr_value ?? '',
                        'QRCODE,H',
                        (float) ($row->qr_x_value ?? 0),
                        (float) ($row->qr_y_value ?? 0),
                        (float) ($row->qr_size ?? 10),
                        (float) ($row->qr_size ?? 10)
                    );
                    break;

                case 'Image':
                    if (empty($row->image_path)) {
                        break;
                    }

                    $imagePath = storage_path('app/public/' . ltrim($row->image_path, '/'));

                    // Optional: check if file actually exists (avoid TCPDF crash)
                    if (!file_exists($imagePath)) {
                        // Log or skip — or use a placeholder
                        break;
                    }

                    $pdf->Image(
                        $imagePath,
                        (float) ($row->image_x ?? 0),
                        (float) ($row->image_y ?? 0),
                        (float) ($row->image_width ?? 0),
                        (float) ($row->image_height ?? 0)
                    );
                    break;
                case 'Shape':
                    if ($row->shape_name == 'Line') {
                        $pdf->SetLineWidth((float) ($row->shape_pen_size ?? 0.3));

                        if (isset($row->element_colour)) {
                            $rgb = $this->hexToRgb($row->element_colour);
                            $pdf->SetDrawColor($rgb[0], $rgb[1], $rgb[2]);
                        } else {
                            $pdf->SetDrawColor(0, 0, 0);
                        }

                        $pdf->Line(
                            (float) $row->shape_x1_value,
                            (float) $row->shape_y1_value,
                            (float) $row->shape_x2_value,
                            (float) $row->shape_y2_value
                        );
                    } elseif ($row->shape_name == 'Rectangle') {
                        $pdf->SetLineWidth((float) ($row->shape_pen_size ?? 0.3));

                        if (isset($row->element_colour)) {
                            $rgb = $this->hexToRgb($row->element_colour);
                            $pdf->SetDrawColor($rgb[0], $rgb[1], $rgb[2]);
                        } else {
                            $pdf->SetDrawColor(0, 0, 0);
                        }

                        $x1 = (float) $row->shape_x1_value;
                        $y1 = (float) $row->shape_y1_value;
                        $x2 = (float) $row->shape_x2_value;
                        $y2 = (float) $row->shape_y2_value;

                        $x = min($x1, $x2);
                        $y = min($y1, $y2);
                        $width  = abs($x2 - $x1);
                        $height = abs($y2 - $y1);

                        $pdf->Rect($x, $y, $width, $height, 'D');
                    }
                    break;
            }
        }

        //return $pdf->Output('sticker.pdf', 'S');
         $pdfContent = $pdf->Output('sticker.pdf', 'S');
         return (new Response($pdfContent, 200))
        ->header('Content-Type', 'application/pdf')
        ->header('Content-Disposition', 'inline; filename="sticker.pdf"');
    }

    private function hexToRgb($hex)
    {
        $hex = ltrim($hex, '#');
        return [
            hexdec(substr($hex, 0, 2)),
            hexdec(substr($hex, 2, 2)),
            hexdec(substr($hex, 4, 2)),
        ];
    }
}