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- <?php
- namespace app\common\service\qrcode;
- use Grafika\Color;
- use Grafika\Grafika;
- class Goods extends Base
- {
- /* @var \app\common\model\Goods $goods 商品信息 */
- private $goods;
- /* @var int $user_id 用户id */
- private $user_id;
- /* @var int $goodsType 商品类型:10商城商品 20拼团商品 */
- private $goodsType;
- /* @var array $pages 小程序码链接 */
- private $pages = [
- 10 => 'pages/goods/index',
- 20 => 'pages/sharing/goods/index'
- ];
- /**
- * 构造方法
- * Goods constructor.
- * @param $goods
- * @param $user
- * @param int $goodsType
- */
- public function __construct($goods, $user, $goodsType = 10)
- {
- parent::__construct();
- // 商品信息
- $this->goods = $goods;
- // 当前用户id
- $this->user_id = $user ? $user['user_id'] : 0;
- // 商品类型:10商城商品 20拼团商品
- $this->goodsType = $goodsType;
- }
- /**
- * @return mixed
- * @throws \app\common\exception\BaseException
- * @throws \think\exception\DbException
- * @throws \Exception
- */
- public function getImage()
- {
- // 判断海报图文件存在则直接返回url
- if (file_exists($this->getPosterPath())) {
- return $this->getPosterUrl();
- }
- // 小程序id
- $wxappId = $this->goods['wxapp_id'];
- // 商品海报背景图
- $backdrop = __DIR__ . '/resource/goods_bg.png';
- // 下载商品首图
- $goodsUrl = $this->saveTempImage($wxappId, $this->goods['image'][0]['file_path'], 'goods');
- // 小程序码参数
- $scene = "gid:{$this->goods['goods_id']},uid:" . ($this->user_id ?: '');
- // 下载小程序码
- $qrcode = $this->saveQrcode($wxappId, $scene, $this->pages[$this->goodsType]);
- // 拼接海报图
- return $this->savePoster($backdrop, $goodsUrl, $qrcode);
- }
- /**
- * 拼接海报图
- * @param $backdrop
- * @param $goodsUrl
- * @param $qrcode
- * @return string
- * @throws \Exception
- */
- private function savePoster($backdrop, $goodsUrl, $qrcode)
- {
- // 实例化图像编辑器
- $editor = Grafika::createEditor(['Gd']);
- // 字体文件路径
- $fontPath = Grafika::fontsDir() . '/' . 'st-heiti-light.ttc';
- // 打开海报背景图
- $editor->open($backdropImage, $backdrop);
- // 打开商品图片
- $editor->open($goodsImage, $goodsUrl);
- // 重设商品图片宽高
- $editor->resizeExact($goodsImage, 690, 690);
- // 商品图片添加到背景图
- $editor->blend($backdropImage, $goodsImage, 'normal', 1.0, 'top-left', 30, 30);
- // 商品名称处理换行
- $fontSize = 30;
- $goodsName = $this->wrapText($fontSize, 0, $fontPath, $this->goods['goods_name'], 680, 2);
- // 写入商品名称
- $editor->text($backdropImage, $goodsName, $fontSize, 30, 750, new Color('#333333'), $fontPath);
- // 写入商品价格
- $priceType = [10 => 'goods_price', 20 => 'sharing_price'];
- $editor->text($backdropImage, $this->goods['sku'][0][$priceType[$this->goodsType]], 38, 62, 964, new Color('#ff4444'));
- // 打开小程序码
- $editor->open($qrcodeImage, $qrcode);
- // 重设小程序码宽高
- $editor->resizeExact($qrcodeImage, 140, 140);
- // 小程序码添加到背景图
- $editor->blend($backdropImage, $qrcodeImage, 'normal', 1.0, 'top-left', 570, 914);
- // 保存图片
- $editor->save($backdropImage, $this->getPosterPath());
- return $this->getPosterUrl();
- }
- /**
- * 处理文字超出长度自动换行
- * @param integer $fontsize 字体大小
- * @param integer $angle 角度
- * @param string $fontface 字体名称
- * @param string $string 字符串
- * @param integer $width 预设宽度
- * @param null $max_line 最多行数
- * @return string
- */
- private function wrapText($fontsize, $angle, $fontface, $string, $width, $max_line = null)
- {
- // 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
- $content = "";
- // 将字符串拆分成一个个单字 保存到数组 letter 中
- $letter = [];
- for ($i = 0; $i < mb_strlen($string, 'UTF-8'); $i++) {
- $letter[] = mb_substr($string, $i, 1, 'UTF-8');
- }
- $line_count = 0;
- foreach ($letter as $l) {
- $testbox = imagettfbbox($fontsize, $angle, $fontface, $content . ' ' . $l);
- // 判断拼接后的字符串是否超过预设的宽度
- if (($testbox[2] > $width) && ($content !== "")) {
- $line_count++;
- if ($max_line && $line_count >= $max_line) {
- $content = mb_substr($content, 0, -1, 'UTF-8') . "...";
- break;
- }
- $content .= "\n";
- }
- $content .= $l;
- }
- return $content;
- }
- /**
- * 海报图文件路径
- * @return string
- */
- private function getPosterPath()
- {
- // 保存路径
- $tempPath = WEB_PATH . 'temp' . '/' . $this->goods['wxapp_id'] . '/';
- !is_dir($tempPath) && mkdir($tempPath, 0755, true);
- return $tempPath . $this->getPosterName();
- }
- /**
- * 海报图文件名称
- * @return string
- */
- private function getPosterName()
- {
- return 'goods_' . md5("{$this->user_id}_{$this->goodsType}_{$this->goods['goods_id']}") . '.png';
- }
- /**
- * 海报图url
- * @return string
- */
- private function getPosterUrl()
- {
- return \base_url() . 'temp/' . $this->goods['wxapp_id'] . '/' . $this->getPosterName() . '?t=' . time();
- }
- }
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