kailin/app/Http/Controllers/Admin/Poster.php

<?php namespace App\Http\Controllers\Admin;

use App\Facades\Servers\WechatMini\Mini;
use App\Models\City;
use App\Models\WeiBan\Tags as WeiBanTags;
use Illuminate\Support\Facades\DB;
use Intervention\Image\Facades\Image;

/**
 * 拉新活动
 *
 * @author    刘相欣
 *
 */
class Poster extends Auth{
	
	protected function _initialize(){
		parent::_initialize();
		$this->assign('breadcrumb1','海报');
		$this->assign('breadcrumb2','生成海报');
	}

	/**
	 * 列表页
	 * 
	 * */
    public function index(){
		// 加载模板
		return 					$this->fetch();
    }

	/**
	 * 获取小程序链接
	 * 
	 */
	private function getUrlLink($id){
		// 结果数据
        $link                  = cache('admin:recruitment:active:urllink:'.$id);
        // 不存在数据
        if ( is_null($link) ) {
            // 从数据库获取数据
            $link              = Mini::getUrlLink('pages/recruitment/index','id='.$id);
            // 存起来
            cache(['admin:recruitment:active:urllink:'.$id=>$link],$link ? now()->addDays(28) : now()->addMinutes(3));
        }
        // 返回结果
        return                  $link;
	}

	/**
	 * 获取小程序海报
	 * 
	 */
	public function get_poster(){
        // 接收参数
        $id								= request('id',0);
        $url							= request('url',0);
        $position						= request('position',0);
        $thumb						    = request('thumb',0);
        $size						    = request('size',0);
        if( !$thumb ) 				    return json_send(['code'=>'error','msg'=>'请上传海报图片']);
        // 获取分享海报图片
        $result 						= $this->getShareImage('id='.$id,$thumb,$url,$position,$size);
        $this->assign('image',$result);
        $this->assign('crumbs','海报');
		// 加载模板
		return 							$this->fetch();
	}

	/**
	 * 获取分享海报图片
	 * @param  int $scene  场景值
	 * 
	 */
	private function getShareImage($scene,$thumb,$url,$position,$size){
		// 尝试执行
		try {
			// 加载图片
			$image							= Image::make(public_path('uploads/').$thumb);
			// 生成小程序二维码
			$qrcode							= Mini::getUnlimit($scene,['page'=>$url,'width'=>$size,'is_hyaline'=>true]);
			// 错误提示
			if( isset($qrcode['error']) )	return $qrcode;
            if ($size < 280){
                // 加载图片 压缩
                $qrcode							= Image::make($qrcode)->resize($size,$size);
            }else{
                // 加载图片
                $qrcode							= Image::make($qrcode);
            }

			// 插入图片
            switch ($position) {
                case 1:
                    $image->insert($qrcode,'top-left',0,0);
                    break;
                case 2:
                    $image->insert($qrcode,'top-center',0,0);
                    break;
                case 3:
                    $image->insert($qrcode,'top-right',0,0);
                    break;
                case 4:
                    $image->insert($qrcode,'center-left',0,0);
                    break;
                case 5:
                    $image->insert($qrcode,'center-center',0,0);
                    break;
                case 6:
                    $image->insert($qrcode,'center-right',0,0);
                    break;
                case 7:
                    $image->insert($qrcode,'bottom-left',0,0);
                    break;
                case 8:
                    $image->insert($qrcode,'bottom-center',0,0);
                    break;
                case 9:
                    $image->insert($qrcode,'bottom-right',0,0);
                    break;
            }
			// 转码成字符串
			$image							= $image->encode('jpg', 90)->__toString();
			// 转base64
			$base64							= 'data:image/jpg;base64,' . base64_encode($image);
			// 返回结果
			return							$base64;
		} catch (\Throwable $th) {
			// 错误提示
			return 							['error'=>$th->getMessage()];
		}
	}


}