235 lines
8.3 KiB
PHP
235 lines
8.3 KiB
PHP
<?php
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namespace app\support;
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class ReportPdfGenerator
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{
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public function generate(array $payload): string
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{
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$heroImage = $this->normalizeHeroImage($payload['hero_image'] ?? null);
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$content = $this->buildContentStream($payload, $heroImage);
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$resources = '<< /Font << /F1 5 0 R >>';
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if ($heroImage) {
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$resources .= ' /XObject << /Im1 7 0 R >>';
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}
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$resources .= ' >>';
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$objects = [
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1 => '<< /Type /Catalog /Pages 2 0 R >>',
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2 => '<< /Type /Pages /Kids [3 0 R] /Count 1 >>',
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3 => sprintf('<< /Type /Page /Parent 2 0 R /MediaBox [0 0 595 842] /Resources %s /Contents 4 0 R >>', $resources),
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4 => sprintf("<< /Length %d >>\nstream\n%s\nendstream", strlen($content), $content),
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5 => '<< /Type /Font /Subtype /Type0 /BaseFont /STSong-Light /Encoding /UniGB-UCS2-H /DescendantFonts [6 0 R] >>',
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6 => '<< /Type /Font /Subtype /CIDFontType0 /BaseFont /STSong-Light /CIDSystemInfo << /Registry (Adobe) /Ordering (GB1) /Supplement 4 >> /DW 1000 >>',
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];
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if ($heroImage) {
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$objects[7] = sprintf(
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"<< /Type /XObject /Subtype /Image /Width %d /Height %d /ColorSpace /DeviceRGB /BitsPerComponent 8 /Filter /DCTDecode /Length %d >>\nstream\n%s\nendstream",
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$heroImage['width'],
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$heroImage['height'],
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strlen($heroImage['data']),
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$heroImage['data']
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);
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}
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return $this->renderPdf($objects);
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}
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private function buildContentStream(array $payload, ?array $heroImage): string
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{
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$title = $this->normalizeText((string)($payload['report_title'] ?? '鉴定报告'));
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$serviceProviderText = $this->normalizeText((string)($payload['service_provider_text'] ?? '-'));
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$institutionName = $this->normalizeText((string)($payload['institution_name'] ?? '-'));
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$reportNo = $this->normalizeText((string)($payload['report_no'] ?? '-'));
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$publishTime = $this->normalizeText((string)($payload['publish_time'] ?? '-'));
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$productName = $this->normalizeText((string)($payload['product_name'] ?? '-'));
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$verifyInfo = $this->normalizeText((string)($payload['verify_info'] ?? '-'));
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$riskNotice = $this->normalizeText((string)($payload['risk_notice_text'] ?? '-'));
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$productItems = is_array($payload['product_items'] ?? null) ? $payload['product_items'] : [];
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$heroImageLabels = is_array($payload['hero_image_labels'] ?? null) ? $payload['hero_image_labels'] : [];
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$blocks = [];
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$y = 790;
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$blocks[] = $this->textBlock($title, 52, $y, 20);
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$y -= 32;
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$blocks[] = $this->textBlock('正式报告凭证，请以报告页防伪查询结果为准。', 52, $y, 10);
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$y -= 30;
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foreach ([
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sprintf('报告编号：%s', $reportNo),
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sprintf('检测机构：%s', $institutionName),
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sprintf('出具时间：%s', $publishTime),
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sprintf('服务类型：%s', $serviceProviderText),
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] as $line) {
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$blocks[] = $this->textBlock($line, 52, $y, 12);
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$y -= 22;
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}
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if ($heroImage) {
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$maxWidth = 230;
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$maxHeight = 150;
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$scale = min($maxWidth / $heroImage['width'], $maxHeight / $heroImage['height'], 1);
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$drawWidth = (int)round($heroImage['width'] * $scale);
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$drawHeight = (int)round($heroImage['height'] * $scale);
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$y -= $drawHeight + 6;
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$blocks[] = $this->imageBlock('Im1', 52, $y, $drawWidth, $drawHeight);
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$y -= 24;
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} elseif ($heroImageLabels) {
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foreach ($this->wrapText('鉴定图片：' . implode('、', array_slice($heroImageLabels, 0, 3)), 34) as $line) {
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$blocks[] = $this->textBlock($line, 52, $y, 11);
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$y -= 18;
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}
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$y -= 8;
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}
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$y -= 8;
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$blocks[] = $this->textBlock('产品信息', 52, $y, 15);
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$y -= 24;
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$blocks[] = $this->textBlock(sprintf('产品名称：%s', $productName), 52, $y, 12);
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$y -= 22;
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foreach ($productItems as $item) {
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if (!is_array($item)) {
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continue;
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}
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$label = $this->normalizeText((string)($item['label'] ?? ''));
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if ($label === '') {
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continue;
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}
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$value = $this->normalizeText((string)($item['value'] ?? '-'));
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$remark = $this->normalizeText((string)($item['remark'] ?? ''));
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foreach ($this->wrapText(sprintf('%s：%s', $label, $value !== '' ? $value : '-'), 34) as $line) {
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$blocks[] = $this->textBlock($line, 52, $y, 11);
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$y -= 18;
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}
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if ($remark !== '') {
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foreach ($this->wrapText('说明：' . $remark, 34) as $line) {
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$blocks[] = $this->textBlock($line, 72, $y, 10);
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$y -= 16;
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}
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}
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$y -= 2;
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}
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$y -= 6;
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$blocks[] = $this->textBlock(sprintf('验真信息：%s', $verifyInfo), 52, $y, 11);
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$y -= 22;
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$y -= 8;
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foreach ($this->wrapText('风险说明：' . $riskNotice, 30) as $line) {
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$blocks[] = $this->textBlock($line, 52, $y, 10);
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$y -= 17;
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}
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if ($y > 48) {
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$blocks[] = $this->textBlock('安心检验鉴定平台', 52, 42, 9);
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}
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return implode("\n", array_filter($blocks));
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}
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private function normalizeHeroImage(mixed $image): ?array
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{
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if (!is_array($image)) {
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return null;
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}
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$data = (string)($image['data'] ?? '');
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$width = (int)($image['width'] ?? 0);
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$height = (int)($image['height'] ?? 0);
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if ($data === '' || $width <= 0 || $height <= 0) {
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return null;
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}
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return [
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'data' => $data,
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'width' => $width,
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'height' => $height,
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];
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}
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private function wrapText(string $text, int $maxUnits): array
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{
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$normalized = $this->normalizeText($text);
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if ($normalized === '') {
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return ['-'];
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}
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$chars = preg_split('//u', $normalized, -1, PREG_SPLIT_NO_EMPTY) ?: [];
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$lines = [];
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$current = '';
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$width = 0.0;
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foreach ($chars as $char) {
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$charWidth = strlen($char) === 1 && ord($char) < 128 ? 0.5 : 1.0;
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if ($current !== '' && $width + $charWidth > $maxUnits) {
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$lines[] = $current;
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$current = '';
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$width = 0.0;
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}
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$current .= $char;
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$width += $charWidth;
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}
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if ($current !== '') {
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$lines[] = $current;
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}
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return $lines ?: ['-'];
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}
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private function textBlock(string $text, int $x, int $y, int $fontSize): string
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{
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if ($text === '') {
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return '';
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}
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return sprintf(
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"BT\n/F1 %d Tf\n1 0 0 1 %d %d Tm\n<%s> Tj\nET",
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$fontSize,
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$x,
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$y,
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strtoupper(bin2hex(mb_convert_encoding($text, 'UCS-2BE', 'UTF-8')))
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);
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}
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private function imageBlock(string $name, int $x, int $y, int $width, int $height): string
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{
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return sprintf("q\n%d 0 0 %d %d %d cm\n/%s Do\nQ", $width, $height, $x, $y, $name);
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}
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private function normalizeText(string $text): string
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{
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$text = trim(str_replace(["\r\n", "\r", "\n", "\t"], [' ', ' ', ' ', ' '], $text));
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return preg_replace('/\s+/u', ' ', $text) ?: '';
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}
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private function renderPdf(array $objects): string
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{
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$pdf = "%PDF-1.4\n%\xE2\xE3\xCF\xD3\n";
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$offsets = [];
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foreach ($objects as $id => $body) {
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$offsets[$id] = strlen($pdf);
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$pdf .= sprintf("%d 0 obj\n%s\nendobj\n", $id, $body);
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}
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$xrefPosition = strlen($pdf);
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$pdf .= sprintf("xref\n0 %d\n", count($objects) + 1);
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$pdf .= "0000000000 65535 f \n";
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foreach ($objects as $id => $_body) {
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$pdf .= sprintf("%010d 00000 n \n", $offsets[$id]);
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}
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$pdf .= sprintf(
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"trailer\n<< /Size %d /Root 1 0 R >>\nstartxref\n%d\n%%%%EOF",
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count($objects) + 1,
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$xrefPosition
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);
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return $pdf;
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}
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}
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