<?php
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namespace app\common\service\qrcode;
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use Grafika\Color;
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use Grafika\Grafika;
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use Endroid\QrCode\QrCode;
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class ProductService extends Base
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{
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// 商品信息
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private $product;
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// 用户id
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private $user_id;
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// 商品类型：10商城商品 20拼团商品
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private $productType;
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// 来源，微信小程序，公众号
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private $source;
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// 小程序码链接
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private $pages = [
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10 => 'pages/product/detail/detail'
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];
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/**
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* 构造方法
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*/
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public function __construct($product, $user,$source, $productType = 10)
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{
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parent::__construct();
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// 商品信息
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$this->product = $product;
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// 当前用户id
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$this->user_id = $user ? $user['user_id'] : 0;
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// 商品类型：10商城商品
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$this->productType = $productType;
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//来源
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$this->source = $source;
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}
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/**
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* @return mixed
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*/
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public function getImage()
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{
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// 判断海报图文件存在则直接返回url
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if (file_exists($this->getPosterPath())) {
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return $this->getPosterUrl();
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}
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// 小程序id
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$appId = $this->product['app_id'];
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// 商品海报背景图
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$backdrop = __DIR__ . '/resource/product_bg.png';
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// 下载商品首图
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$productUrl = $this->saveTempImage($appId, $this->product['image'][0]['file_path'], 'product');
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$qrcode = null;
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if($this->source == 'wx'){
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// 小程序码参数
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$scene = "gid:{$this->product['product_id']},uid:" . ($this->user_id ?: '');
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// 下载小程序码
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$qrcode = $this->saveQrcode($appId, $scene, $this->pages[$this->productType]);
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}else if($this->source == 'mp' || $this->source == 'h5'){
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$scene = "gid:{$this->product['product_id']},uid:" . ($this->user_id ?: '');
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$qrcode = new QrCode(base_url().'h5/pages/product/detail/detail?product_id='.$this->product['product_id'].'&app_id='.$appId.'&referee_id='.$this->user_id ?: '');
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$qrcode = $this->saveMpQrcode($qrcode, $appId, $scene, 'image_mp');
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}
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// 拼接海报图
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return $this->savePoster($backdrop, $productUrl, $qrcode);
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}
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/**
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* 拼接海报图
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*/
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private function savePoster($backdrop, $productUrl, $qrcode)
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{
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// 实例化图像编辑器
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$editor = Grafika::createEditor(['Gd']);
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// 字体文件路径
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$fontPath = Grafika::fontsDir() . '/' . 'st-heiti-light.ttc';
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// 打开海报背景图
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$editor->open($backdropImage, $backdrop);
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// 打开商品图片
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$editor->open($productImage, $productUrl);
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// 重设商品图片宽高
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$editor->resizeExact($productImage, 690, 690);
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// 商品图片添加到背景图
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$editor->blend($backdropImage, $productImage, 'normal', 1.0, 'top-left', 30, 30);
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// 商品名称处理换行
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$fontSize = 30;
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$productName = $this->wrapText($fontSize, 0, $fontPath, $this->product['product_name'], 680, 2);
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// 写入商品名称
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$editor->text($backdropImage, $productName, $fontSize, 30, 750, new Color('#333333'), $fontPath);
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// 写入商品价格
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$priceType = [10 => 'product_price'];
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$editor->text($backdropImage, $this->product['sku'][0][$priceType[$this->productType]], 38, 62, 964, new Color('#ff4444'));
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// 打开小程序码
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$editor->open($qrcodeImage, $qrcode);
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// 重设小程序码宽高
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$editor->resizeExact($qrcodeImage, 140, 140);
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// 小程序码添加到背景图
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$editor->blend($backdropImage, $qrcodeImage, 'normal', 1.0, 'top-left', 570, 914);
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// 保存图片
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$editor->save($backdropImage, $this->getPosterPath());
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return $this->getPosterUrl();
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}
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/**
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* 处理文字超出长度自动换行
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*/
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private function wrapText($fontsize, $angle, $fontface, $string, $width, $max_line = null)
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{
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// 这几个变量分别是 字体大小, 角度, 字体名称, 字符串, 预设宽度
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$content = "";
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// 将字符串拆分成一个个单字 保存到数组 letter 中
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$letter = [];
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for ($i = 0; $i < mb_strlen($string, 'UTF-8'); $i++) {
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$letter[] = mb_substr($string, $i, 1, 'UTF-8');
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}
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$line_count = 0;
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foreach ($letter as $l) {
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$testbox = imagettfbbox($fontsize, $angle, $fontface, $content . ' ' . $l);
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// 判断拼接后的字符串是否超过预设的宽度
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if (($testbox[2] > $width) && ($content !== "")) {
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$line_count++;
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if ($max_line && $line_count >= $max_line) {
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$content = mb_substr($content, 0, -1, 'UTF-8') . "...";
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break;
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}
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$content .= "\n";
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}
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$content .= $l;
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}
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return $content;
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}
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/**
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* 海报图文件路径
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*/
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private function getPosterPath()
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{
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// 保存路径
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$tempPath = root_path('public') . 'temp' . '/' . $this->product['app_id'] . '/' . $this->source. '/';
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!is_dir($tempPath) && mkdir($tempPath, 0755, true);
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return $tempPath . $this->getPosterName();
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}
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/**
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* 海报图文件名称
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*/
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private function getPosterName()
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{
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return 'product_' . md5("{$this->user_id}_{$this->productType}_{$this->product['product_id']}") . '.png';
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}
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/**
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* 海报图url
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*/
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private function getPosterUrl()
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{
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return \base_url() . 'temp/' . $this->product['app_id'] . '/' .$this->source . '/' . $this->getPosterName() . '?t=' . time();
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}
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}
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