uniProject/components/zhuapaiConfirm/useCamera.js

const errorMessage = {
	ms1: '请使用微信、Chrome、Firefox或Safari浏览器，如果浏览器没有问题，请联系管理员',
	ms2: '请使用微信、Chrome、Firefox或Safari',
	ms3: 'navigator对象无媒体属性', // 错误提示同ms2
	ms4: '未找到摄像头，请确认摄像头是否正常以及当前摄像头是否被禁用',
	ms5: '检测到当前摄像头已被占用，请关闭摄像头后重新尝试',
	ms6: '摄像头硬件无法满足使用要求，请更换摄像头后重新尝试',
	ms7: '请开启浏览器摄像头权限',
	ms8: '未获取摄像头数据，请检测摄像头是否正常',
	ms9: '当前浏览器不支持，请更换浏览器后尝试',
	ms10: '当前Android系统版本低于9！请更新操作系统',
	ms11: '当前IOS系统版本低于14.3！请更新操作系统',
	ms12: '推荐使用safari浏览器或微信，使用其他浏览器可能会在考试过程中出现摄像头问题，影响考试结果，导致重考，不建议使用其他浏览器。',
	ms13: '推荐使用火狐浏览器、谷歌浏览器或微信，使用其他浏览器可能会在考试过程中出现摄像头问题，影响考试结果，导致重考，不建议使用其他浏览器',
};

export {
	errorMessage
};


function checkPlatform2() {
	const ua = navigator.userAgent.toLowerCase();
	// 安卓系统
	if (/android/i.test(navigator.userAgent)) {
		let test = /android\s([\w.]+)/;
		let match = test.exec(ua);
		let version = match[1].split('.')[0];
		if (version < 9) {
			Toast.fail(errorMessage.ms10);
			return {
				data: false,
				waitCode: false
			};
		}
		// 判断 浏览器 Android
		if (!checkAndroidForBrowser()) {
			// 提示信息
			Toast.fail({
				message: errorMessage.ms13,
				duration: 5000
			});
			return {
				data: true,
				waitCode: true
			};
		}
		return {
			data: true,
			waitCode: false
		};
	}
	// ios 系统
	if (/(iphone | ipad | ipod | iOS)/i.test(navigator.userAgent)) {
		let test = /os\s([\w]+)/;
		let match = test.exec(ua);
		let vs = match[1].split('_');
		let version = '';

		if (vs.length > 2) {
			version = `${vs[0]}.${vs[1]}`;
		} else if (vs.length == 2) {
			version = `${vs[0]}.${vs[1]}`;
		} else {
			version = `${vs[0]}.0`;
		}

		if (version < 14.3) {
			Toast.fail(errorMessage.ms11);
			return {
				data: false,
				waitCode: false
			};
		}

		// 判断浏览器兼容 判断 ios 浏览器提示信息
		// 判断 浏览器 Android
		if (!checkIosForBrowser()) {
			// 提示信息
			Toast.fail({
				message: errorMessage.ms12,
				duration: 5000
			});
			return {
				data: true,
				waitCode: true
			};
		}

		return {
			data: true,
			waitCode: false
		};
	}
}

function checkIosForBrowser() {
	let u = navigator.userAgent;
	let result = false;
	let curname = getBrowser();
	// 如果是 苹果
	if (curname === 'safari') {
		result = true;
	}
	// 如果是 微信
	if (u.indexOf('MicroMessenger') > -1) {
		result = true;
	}
	return result;
}

function checkAndroidForBrowser() {
	let curname = getBrowser();
	let result = false;
	// 如果是 谷歌
	if (curname === 'chrome') {
		result = true;
	}
	if (curname === 'firefox') {
		result = true;
	}
	// 如果是 微信
	if (curname === 'wechat') {
		result = true;
	}
	return result;
}

function getBrowser() {
	var u = navigator.userAgent;

	var bws = [{
		name: 'sgssapp',
		it: /sogousearch/i.test(u),
	}, {
		name: 'wechat',
		it: /MicroMessenger/i.test(u),
	}, {
		name: 'weibo',
		it: !!u.match(/Weibo/i),
	}, {
		name: 'uc',
		it: !!u.match(/UCBrowser/i) || u.indexOf(' UBrowser') > -1,
	}, {
		name: 'sogou',
		it: u.indexOf('MetaSr') > -1 || u.indexOf('Sogou') > -1,
	}, {
		name: 'xiaomi',
		it: u.indexOf('MiuiBrowser') > -1,
	}, {
		name: 'baidu',
		it: u.indexOf('Baidu') > -1 || u.indexOf('BIDUBrowser') > -1,
	}, {
		name: '360',
		it: u.indexOf('360EE') > -1 || u.indexOf('360SE') > -1,
	}, {
		name: '2345',
		it: u.indexOf('2345Explorer') > -1,
	}, {
		name: 'edge',
		it: u.indexOf('Edge') > -1,
	}, {
		name: 'ie11',
		it: u.indexOf('Trident') > -1 && u.indexOf('rv:11.0') > -1,
	}, {
		name: 'ie',
		it: u.indexOf('compatible') > -1 && u.indexOf('MSIE') > -1,
	}, {
		name: 'firefox',
		it: u.indexOf('Firefox') > -1,
	}, {
		name: 'safari',
		it: u.indexOf('Safari') > -1 && u.indexOf('Chrome') === -1 && u.indexOf('(KHTML, like Gecko) Version') >
			-1 && u.indexOf('MQQBrowser') === -1 && u.indexOf('FingerBrowser') === -1,
	}, {
		name: 'qqbrowser',
		it: u.indexOf('MQQBrowser') > -1 && u.indexOf(' QQ') === -1,
	}, {
		name: 'qq',
		it: u.indexOf('QQ') > -1,
	}, {
		name: 'chrome',
		it: u.indexOf('(KHTML, like Gecko) Chrome') > -1 && u.indexOf('MiuiBrowser') === -1 && u.indexOf(
			'UCBrowser') === -1 && u.indexOf('HarmonyOS') === -1 && u.indexOf('HuaweiBrowser') === -1,
	}, {
		name: 'opera',
		it: u.indexOf('Opera') > -1 || u.indexOf('OPR') > -1,
	}, {
		name: 'wechat',
		it: /MicroMessenger/i.test(u)
	}, ];

	for (var i = 0; i < bws.length; i++) {
		if (bws[i].it) {
			return bws[i].name;
		}
	}

	return 'other';
}

export function errorFunComplete(e) {
	const name = e.name;
	if (name === 'NotFoundError' || name === 'DevicesNotFoundError') {
		Toast.fail(errorMessage.ms4);
	}
	if (name === 'NotReadableError' || name === 'TrackStartError') {
		Toast.fail(errorMessage.ms5);
	} else if (name === 'OverconstrainedError' || name === 'ConstraintNotSatisfiedError') {
		Toast.fail(errorMessage.ms6);
	} else if (name === 'NotAllowedError' || name === 'PermissionDeniedError') {
		Toast.fail(errorMessage.ms7);
	} else if (name === 'TypeError' || name === 'TypeError') {
		Toast.fail(errorMessage.ms8);
	} else {
		Toast.fail(errorMessage.ms9);
	}
}

let constraints = {
	audio: false,
	video: {
		width: 480,
		height: 320,
		sourceId: 'default',
		deviceId: 'default',
		transform: 'rotate(180deg)',
		facingMode: {
			// exact: 'user'
		},
	},
};

// 校验权限
export function check(success, error, backFun) {

	if (!navigator) {
		Toast.fail({
			message: errorMessage.ms1,
			duration: 5000
		});
		// 当前浏览器版本 无媒体对象
		backFun && backFun();
		return false;
	}

	const resoutData = checkPlatform2();
	const timeD = resoutData.waitCode ? 5000 : 0;
	if (!resoutData.data) {
		backFun && backFun();
		return false;
	}

	setTimeout(() => {
		if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
			//最新的标准API 返回promise
			navigator.mediaDevices.getUserMedia(constraints).then(success).catch(error);
		} else if (navigator.webkitGetUserMedia) {
			//webkit核心浏览器
			navigator.webkitGetUserMedia(constraints, success, error);

		} else if (navigator.mozGetUserMedia) {
			//firfox浏览器
			navigator.mozGetUserMedia(constraints, success, error);

		} else if (navigator.getUserMedia) {
			//旧版API
			navigator.getUserMedia(constraints, success, error);
		} else {
			Toast.fail(errorMessage.ms2);
			backFun && backFun();
		}
	}, timeD);
	// 没有媒体对象
	// Toast.fail(errorMessage.ms2);
	// 1. ios 14.3版本一下
	// 2. 当前浏览器非完整版
}

// 抓拍确认
export function check2(success, error) {


	if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
		//最新的标准API 返回promise
		navigator.mediaDevices.getUserMedia(constraints).then(success).catch(error);
	} else if (navigator.webkitGetUserMedia) {
		//webkit核心浏览器
		navigator.webkitGetUserMedia(constraints, success, error);

	} else if (navigator.mozGetUserMedia) {
		//firfox浏览器
		navigator.mozGetUserMedia(constraints, success, error);
	} else if (navigator.getUserMedia) {
		//旧版API
		navigator.getUserMedia(constraints, success, error);
	}
}

import {
	ref,
	nextTick
} from "vue"
import {useZhuapaiStore} from "@/store/zhuapai.js"
import {getFileUpload} from "@/api/kaoshi.js"

// H5 播放抓拍功能
export function useH5Camera({
	elVideoId,
	elCanvasId,
	onVideoSuccess, // 成功播放回调
	onVideoError, // 失败回调
	zhuapaiHttp, // 抓拍接口将base64 上传
	operId
}) {

	const zhuapaiStore = useZhuapaiStore();


	const videoRef = ref('');
	videoRef.value = document.querySelector(`${elVideoId} .uni-video-video`);

	function videoSuccessFun(MediaStream) {
		// 赋值流
		videoRef.value.srcObject = MediaStream;
		// 设置video监听 为了确实获取视频播放判断有视频数据流
		addVideoListener();
		// 播放video 执行播放操作
		playVideo();
	}

	function addVideoListener() {
		videoRef && videoRef.value.addEventListener('play', onVideoPlay);
	}

	function removeVideoListener() {
		videoRef && videoRef.value.removeEventListener('play', onVideoPlay);
	}

	function playVideo() {
		if (videoRef.value) {
			videoRef.value.play();
		}
	}

	function onVideoPlay() {
		onVideoSuccess && onVideoSuccess();
	}

	function videoErrorFun(e) {
		console.log('错误', e)
		removeVideoListener();
		onVideoError && onVideoError(e)
	}

	// 主动开启
	function startH5Camera() {
		check2(videoSuccessFun, videoErrorFun);
	}

	// 主动关闭
	function stopH5Camera() {
		// 重置虚拟流
		const stream = videoRef && videoRef.value.srcObject;
		if (!stream) {
			return;
		}

		const tracks = stream.getTracks();
		tracks.forEach(function(track) {
			track.stop();
		});
		// 销毁视频资源
		videoRef.value.srcObject = null;
		// 移除监听
		removeVideoListener && removeVideoListener();
	}

	function handlePaiZhao() {
		try {
			const streamActive = videoRef.value.srcObject.active;
			// 判断视频流 是否运行
			if (!streamActive) {
				onVideoError && onVideoError(new Error('摄像头抓拍异常'))
				return;
			}
		} catch (e) {
			onVideoError && onVideoError(new Error('摄像头抓拍异常'))
			return;
		}

		try {
			if (zhuapaiStore.status == 0) {
				// status 为 如果抓拍过程中 应用进入后台 传递固定图片 0为正常 1为进入后台
				let canvas = document.querySelector(`${elCanvasId} .uni-canvas-canvas`);
				let context = canvas.getContext('2d');
				context.drawImage(videoRef.value, 0, 0, videoRef.value.clientWidth, videoRef.value.clientHeight);
				const ImageFile = context.canvas.toDataURL('image/png');
				getSnapShotImage(ImageFile);
			} else {
				 const ImageFile = getBase64Image()
				getSnapShotImage(ImageFile);
			}
		} catch (err) {
			console.error('源 ：绘图失败', err);
		}
	}

	function getBase64Image() {
		var canvas = document.createElement("canvas");
		var ctx = canvas.getContext("2d");
		canvas.width = 480;
		canvas.height = 320;
		ctx.drawImage(document.querySelector('#gdImg'), 0, 0, 480, 320);
		let image = new Image();
		image.src = canvas.toDataURL('image/png', 1)
		setTimeout(res => {
			ctx.clearRect(0, 0, 480, 320)
		}, 500)
		return image.src
	}

	function getSnapShotImage(data) {
		console.log('base64', data)
		const imgData = data.split(';base64,');
		if (!imgData.length) {
			console.error('【源 ：拍照数据异常，未找到图片二进制数据分割节点： `;base64,`】');
			return;
		}
		const opt = {
			data: imgData[1],
			prefix: 'kaoshi/zhuapai',
			suffix: 'png',
			
		};

		console.log('optoptopt', opt)
		
		getFileUpload(opt).then(res => {
			const dOption = {
				operId,
				url: res.data
			}
			zhuapaiHttp && zhuapaiHttp(dOption)
				.then(res => {
					console.log('【源 ： 获取抓拍数据】');
				})
				.catch(err => {
					console.error('源 ：抓拍接口异常', err);
					uni.showToast({
						icon: 'none',
						title: '抓拍图片异常!'
					})
					uni.redirectTo({
						url: "/pages/client/Kaoshi/list"
					})
				});
		}).catch(err => {
			uni.showToast({
				icon: 'none',
				title: '抓拍图片异常!'
			})
			uni.redirectTo({
				url: "/pages/client/Kaoshi/list"
			})
		})
		
		
	}

	return {
		startH5Camera,
		stopH5Camera,
		handlePaiZhao
	}
}