prevention/package_A/page/upload/index.js

// package_A/page/upload/index.js
const crypto = require('crypto-js')
import {Base64} from 'js-base64'
import {getOssAuth} from '../../../api/upload.js'
import {confirmOrder} from '../../../api/task.js'
Page({

    /**
     * 页面的初始数据
     */
    data: {
        type: 'upload',
        form: {},
        carNumberList: [],
        healthCodeList: [],
        formRules: {
            carNumberList: {
                validator: function (value) {
                    return value.length!=0;
                },
                warning: false
            },
            healthCodeList: {
                validator: function (value) {
                  return value.length!=0;
                },
                warning: false
            }
        }
    },

    onLoad(e) {
        if(e.data) {
            let data = JSON.parse(e.data)
            let carNumberList = [data.carUrl]
            let list = data.registerFlowmanVoList || []
            let arr = []
            if(list.length > 0) {
                list.forEach(item=> {
                    if(item.imageUrl) {
                        arr.push(item.imageUrl)
                    }
                })
            }
            let healthCodeList = arr
            this.setData({type: 'detail', carNumberList, healthCodeList})
        }
        if(this.data.type === 'upload') {
            this.getOssAuthForm()
        }
    },
   
    // 图片预览
    previewImage(e) {
        let type = e.currentTarget.dataset.type
        let str = type + 'List'
        wx.previewImage({
          urls: this.data[str],
        })
    },
    validate(name) {
        let formRules = this.data.formRules;
        let validator = formRules[name].validator
        let result
        result = validator ? !validator(this.data[name]) : false
        formRules[name].warning = result
        this.setData({formRules})
        return result
    },
    // 表单验证
    validateForm() {
        return new Promise((resolve, reject) => {
            try {
            let formRules = this.data.formRules;
            let result = false;
            for (let key in formRules) {
                let temp = this.validate(key)
                if (temp) {
                result = temp
                }
            }
            resolve(!result)
            } catch (e) {
            reject(e)
            }
        })
    },
    /* 获取图片上传鉴权 */
    getOssAuthForm() {
        let that = this
        getOssAuth().then((res)=> {
            let client = {
                region: 'oss-cn-shanghai',
                secure: true,
                accessKeyId: res.accessKeyId,
                accessKeySecret: res.accessKeySecret,
                securityToken: res.securityToken,
                bucket: 'ta-tech-image'
            }
            // 计算签名
            function computeSignature(accessKeySecret, canonicalString) {
                return crypto.enc.Base64.stringify(crypto.HmacSHA1(canonicalString, accessKeySecret));
            }
            const date = new Date();
            date.setHours(date.getHours() + 1);
            const policyText = {
                expiration: date.toISOString(), // 设置policy过期时间。
                conditions: [
                    // 限制上传大小。
                    ["content-length-range", 0, 1024 * 1024 * 1024],
                ],
            };
            // 获取签名
            const policy = Base64.encode(JSON.stringify(policyText)) // policy必须为base64的string。
            const signature = computeSignature(client.accessKeySecret, policy)
            let ossForm = that.data.ossForm
            ossForm = {
                OSSAccessKeyId: client.accessKeyId,
                signature,
                policy,
                SecurityToken: client.securityToken 
            }
            that.setData({ossForm})
        }).catch(e=> {
            console.log(e);
        })
    
    },
    /* 上传图片 */
    uploadImages(e){
        let type = e.currentTarget.dataset.type
        let limit = e.currentTarget.dataset.limit
        wx.chooseImage({
          count: limit - this.data[type + 'List'].length, // 最多可以选择的图片张数，默认9
          mediaType: ['image'], // 图片
          sizeType: ['compressed'], // original 原图，compressed 压缩图，默认二者都有
          sourceType: ['album', 'camera'], // album 从相册选图，camera 使用相机，默认二者都有
          success:(res) =>{
              // success
              let str = type+'List'
              let imageList = this.data[str].concat(res.tempFilePaths);
              if(type === 'carNumber') {
                  this.setData({carNumberList: imageList})
              } else {
                this.setData({healthCodeList: imageList})
              }
              this.validate(type+'List')
          },
          fail: (e) => {
              console.log('取消选择');
          }
        })
    },
    // 删除图片
    deleteImage(e) {
        let type = e.currentTarget.dataset.type
        let index = this.getCurrentData(e);
        let list = this.data[type+"List"]
        list.splice(index, 1)
        let str = type + 'List'
        if(type === 'carNumber') {
            this.setData({carNumberList: list})
        } else {
          this.setData({healthCodeList: list})
        }
        this.validate(str)
    },
    getCurrentData(e) {
        return e.currentTarget.dataset.current;
    },
    /* 取消 */
    returnLastPage() {
        this.setData({
            form: {}
        })
        wx.navigateBack({
          delta: 1,
        })
    },
    /* 表单上传 */
    submit(){
        this.validateForm().then(res => {
            if(res) {
                let carNumberList = this.data.carNumberList
                let healthCodeList = this.data.healthCodeList
                let imageList = carNumberList.concat(healthCodeList)
                let ossForm = this.data.ossForm
                let temp = []
                if (imageList.length > 0) {
                    wx.showLoading({title:"上传中",mask:true})
                    temp = imageList.map(item => {
                        // 设置文件上传路径
                        const randomString = Math.random().toString(36).slice(2)
                        const timestamp = new Date().getTime()
                        const key = `imagedir/${randomString}_${timestamp}.png`
                        // 上传图片
                        return new Promise((resolve, reject)=> {
                            wx.uploadFile({
                                url: 'https://ta-tech-image.oss-cn-shanghai.aliyuncs.com',
                                filePath: item,
                                name: 'file',
                                formData: {
                                    key,
                                    OSSAccessKeyId: ossForm.OSSAccessKeyId,
                                    signature: ossForm.signature,
                                    policy: ossForm.policy,
                                    'x-oss-security-token': ossForm.SecurityToken 
                                },
                                success: (res)=> {
                                    if(res.statusCode === 204) {
                                        // 上传成功，将图片路径resolve出去
                                        resolve(key)
                                    } 
                                },
                                fail: (e)=> {
                                    wx.showToast({
                                        title: '图片上传失败',
                                    })
                                }
                            })
                        })
                    })
                    Promise.all(temp).then((res)=> {
                        let form = this.data.form;
                        form.carUrl = res[0]
                        res.shift()
                        form.flowManUrlList = res
                        // 登记
                        confirmOrder(form).then(res => {
                            if (res?.code === 0) {
                                wx.reLaunch({
                                    url: '/pages/task/task',
                                })
                            }
                        }).catch(e=> {
                            console.log(e);
                        }).finally(()=>{
                            wx.hideLoading();
                        })
                          
        
                    }).catch((e)=> {
                        wx.hideLoading()
                    })
                }
            }
        })
    
        
    }
    

})