TEAMModelOS/TEAMModelOS/ClientApp/src/utils/js-fn.js

import store from '@/store'
import {
    app
} from '@/boot-app.js'
import _tools from "./public.js"
import _editorTools from "./editorTools.js"
/*
 * 根据某个属性进行分组
 */
function groupBy(array, key) {
    const groups = {}
    array.forEach(function (item) {
        const group = JSON.stringify(item[key])
        groups[group] = groups[group] || []
        groups[group].push(item)
    })
    return Object.keys(groups).map(function (group) {
        return groups[group]
    })
}
/*
 * 判断两个对象是否相等
 */
function isObjEqual(o1, o2) {
    var props1 = Object.keys(o1)
    var props2 = Object.keys(o2)
    if (props1.length != props2.length) {
        return false
    }
    for (var i = 0, max = props1.length; i < max; i++) {
        var propName = props1[i]
        if (o1[propName] !== o2[propName]) {
            return false
        }
    }
    return true
}
/*
 * 获取对象在对象数组的index
 */
function getIndex(_arr, _obj) {
    var len = _arr.length
    for (let i = 0; i < len; i++) {
        if (isObjEqual(_arr[i], _obj)) {
            return parseInt(i)
        }
    }
    return -1
}
/*
 * 产生某个范围的随机数
 */
function getBtwRandom(start, end) {
    return Math.floor(Math.random() * (end - start)) + start
}

/*
 *根据图片链接压缩图片得到缩略图 
 * @params url: 文件url
 */
function compressImgByUrl(url, name, quality) {
    return new Promise((r, j) => {
        try {
            let img = new Image()
            img.setAttribute('crossOrigin', 'Anonymous')
            img.src = url
            img.onload = function () {
                let canvas = document.createElement('canvas')
                canvas.width = 200
                canvas.height = 200 * img.height / img.width
                let ctx = canvas.getContext('2d')
                ctx.drawImage(img, 0, 0, img.width, img.height, 0, 0, canvas.width, canvas.height)
                let newImgData = canvas.toDataURL('image/png', quality)
                //let resultFile = dataURLtoFile(newImgData, name)
                //r(resultFile)
                r(newImgData)
            }
            img.onerror = function (e) {
                console.error('图片Error', e)
                j('Format Error')
            }
        }
        catch (err) {
            j(err)
        }
    })
}
/*
 *根据视频链接创建封面图
 * @params url: 文件url
 */
function createVideoPoster(url, name, quality) {
    return new Promise(
        (r, j) => {
            try {
                let video = document.createElement('video')
                video.setAttribute('crossOrigin', 'Anonymous')
                video.setAttribute('width', '300')
                video.setAttribute('controls', 'controls')
                video.setAttribute('crossOrigin', 'Anonymous')
                video.setAttribute('src', url)
                video.currentTime = 1
                console.log(url)
                video.addEventListener('loadeddata', () => {
                    let canvas = document.createElement('canvas')
                    canvas.width = 300
                    canvas.height = 300 * video.videoHeight / video.videoWidth
                    let ctx = canvas.getContext('2d')
                    ctx.drawImage(video, 0, 0, video.videoWidth, video.videoHeight, 0, 0, canvas.width, canvas.height)
                    let newVideoData = canvas.toDataURL('image/png', quality)
                    //let resultFile = dataURLtoFile(newVideoData, name)
                    r(newVideoData)
                })
                video.addEventListener('error', (e) => {
                    console.error(e)
                    j('Format Error')
                })
            }
            catch (err) {
                j(err)
            }
        }
    )
}

/*
 *dataUrl转文件 
 */
function dataURLtoFile(dataurl, filename) {
    console.log(...arguments);
    let arr = dataurl.split(',')
    let mime = arr[0].match(/:(.*?);/)[1]
    let bstr = atob(arr[1])
    let n = bstr.length
    let u8arr = new Uint8Array(n)
    while (n--) {
        u8arr[n] = bstr.charCodeAt(n)
    }
    return new File([u8arr], filename, { type: mime })
}
/*
 *文件转dataUrl
 */
function fileToURL(file) {
    return new Promise((r, j) => {
        try {
            var reader = new FileReader()
            reader.onloadend = function (e) {
                r(e.target.result)
            }
            reader.readAsDataURL(file)
        } catch (e) {
            j(e)
        }
    })

}

/*
 * 函数防抖
 */
function debounce(func, delay) {
    return function () {
        window.clearTimeout(window.timeout)
        window.timeout = setTimeout(() => {
            clearTimeout(window.timeout)
            func.apply(this, arguments)
        }, delay)
    }
}

/*
 * 函数节流
 */
function throttle(func, delay) {
    let run = true
    return function () {
        if (!run) {
            return  // 如果开关关闭了，那就直接不执行下边的代码
        }
        run = false // 持续触发的话，run一直是false，就会停在上边的判断那里
        setTimeout(() => {
            func.apply(this, arguments)
            run = true // 定时器到时间之后，会把开关打开，我们的函数就会被执行
        }, delay)
    }
}
//转换bytes
function formatBytes(bytes) {
    bytes = bytes || 0
    return bytes / 1024 < 1024 ? (bytes / 1024).toFixed(1) + 'KB' : bytes / 1024 / 1024 < 1024 ? (bytes / 1024 / 1024).toFixed(1) + 'M' : (bytes / 1024 / 1024 / 1024).toFixed(1) + 'G'
}
//生成uuid
function uuid() {
    function S4() {
        return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1)
    }
    return (S4() + S4() + '-' + S4() + '-' + S4() + '-' + S4() + '-' + S4() + S4() + S4())
}
// 获取某个字符在字符串中第num次出现的index
function findChartIndex(str, cha, num) {
    var x = str.indexOf(cha);
    for (var i = 0; i < num; i++) {
        x = str.indexOf(cha, x + 1);
    }
    return x;
}
function timeFormat(timestamp) {
    timestamp = timestamp < 10000000000 ? timestamp * 1000 : timestamp
    let date = new Date(timestamp)
    let Y = date.getFullYear()
    let M = date.getMonth()
    let D = date.getDate()
    let H = date.getHours()
    let MIN = date.getMinutes()
    return `${Y}/${M < 9 ? '0' + (M + 1) : M + 1}/${D} ${H < 10 ? '0' + H : H}:${MIN < 10 ? '00' : MIN}`
}
function dateFormat(timestamp) {
    if (timestamp <= 0) return ''
    timestamp = timestamp < 10000000000 ? timestamp * 1000 : timestamp
    let date = new Date(timestamp)
    let Y = date.getFullYear()
    let M = date.getMonth()
    let D = date.getDate()
    return `${Y}/${M < 9 ? '0' + (M + 1) : M + 1}/${D}`
}

/**
 * 根据学年获取年级名称
 * @param year 学年
 */
function getGradeNameByYear(year) {
    if (year && year > 0) {
        let curPeriod = store.state.user?.curPeriod
        if (curPeriod) {
            let date = new Date()
            let curYear = date.getFullYear()
            let month = date.getMonth() + 1
            let start = curPeriod.semesters.find(item => {
                return item.start == 1
            })
            // 根据入学月份确定当前年级和学级的关系
            if (start && month < start.month) {
                curYear--
            }
            let res = curPeriod.grades[curYear - year]
            if (curYear - year >= curPeriod.grades.length) {
                return app.$t('schoolBaseInfo.graduated')
            }
            return res ? res : app.$t('schoolBaseInfo.untimed')
        } else {
            return '--'
        }
    } else {
        return '--'
    }
}

/**
 * 根据学年获取年级信息
 * @param year 学年
 * @param periodId 学段id（非必填）
 */
function getGradeInfoByYear(year, periodId) {
    if (year && year > 0) {
        let curPeriod
        if (periodId) {
            curPeriod = store.state.user?.schoolProfile?.school_base?.period?.find(item => item.id == periodId)
        } else {
            curPeriod = store.state.user?.curPeriod
        }
        if (curPeriod) {
            let date = new Date()
            let curYear = date.getFullYear()
            let month = date.getMonth() + 1
            let start = curPeriod.semesters.find(item => {
                return item.start == 1
            })
            // 根据入学月份确定当前年级和学级的关系
            if (start && month < start.month) {
                curYear--
            }
            let res = curPeriod.grades[curYear - year]
            let gradeName
            if (curYear - year >= curPeriod.grades.length) {
                gradeName = app.$t('schoolBaseInfo.graduated')
            }
            gradeName = res ? res : app.$t('schoolBaseInfo.untimed')
            return {
                id: curYear - year,
                name: gradeName
            }
        } else {
            return undefined
        }
    } else {
        return undefined
    }
}

/**
 * 根据班级学年年级名称
 * @param data 学校基础数据 schoolProfile.school_base
 * @param curPd 当前学段id
 * @param grade 年级index
 */
function getYearByGrade(grade) {
    let date = new Date()
    let curYear = date.getFullYear()
    let month = date.getMonth() + 1
    grade = parseInt(grade)
    let curPeriod = store.state.user?.curPeriod
    if (grade > -1 && curPeriod) {
        let start = curPeriod.semesters.find(item => {
            return item.start == 1
        })
        // 根据入学月份确定当前年级和学级的关系
        if (start && month < start.month) {
            curYear--
        }
        return curYear - grade
    } else {
        return curYear
    }
}
/**
 * 根据教师绑定的学科id获取学科和学段名称
 * @param ids 学科ids
 * @returns 
 * [
 *  {
 *      periodId:'ddd'
 *      periodName:'小学',
 *      subjectId:'wwww',
 *      subjectName:'语文'
 *  }
 * ]
 */
function getTeacherSubjects(ids) {
    let schoolPeriod = store.state.user?.schoolProfile?.school_base?.period
    if (ids && ids.length && schoolPeriod) {
        let data = []
        ids.forEach(sid => {
            for (let i = 0; i < schoolPeriod.length; i++) {
                let subjectInfo = schoolPeriod[i].subjects.find(subject => subject.id === sid)
                if (subjectInfo) {
                    data.push({
                        periodId: schoolPeriod[i].id,
                        periodName: schoolPeriod[i].name,
                        subjectId: subjectInfo.id,
                        subjectName: subjectInfo.name
                    })
                    break
                }
            }
        })
        return data
    } else {
        return []
    }

}
//根据域名判断菜单是否显示
function checkJinNiu() {
    let host = window.location.host
    return host == 'jinniu.teammodel.cn'
}
//根据域名判断菜单是否显示
function checkTrain() {
    let host = window.location.host
    return host == 'scyx.teammodel.cn'
}
/**
 * 统一处理学生作答数据
 * @param {string} fullUrl ans.json完成路径含授权
 * @param {string} richPrefix 富文本前缀（到stuId）
 * @param {string} sas 授权(不需要“？”)
 */
function handleStudentAnswer(fullUrl, richPrefix, sas) {
    return new Promise(async (r, j) => {
        try {
            let ansStr = await _tools.getFile(fullUrl)
            if (ansStr) {
                let ans = JSON.parse(ansStr)
                ans.forEach((item, index) => {
                    // 数据异常
                    if (!item) {
                        ans[index] = [app.$t('learnActivity.score.ansErr')]
                    }
                    // 未作答
                    else if (!item.length) {
                        ans[index] = [app.$t('learnActivity.score.noStuAns')]
                    }
                    // 处理富文本中多媒体
                    else {
                        item.forEach((as, ai) => {
                            item[ai] = _editorTools.getMideaFullPath(as, richPrefix + '/', '?' + sas)
                        })
                        ans[index] = item
                    }
                })
                r(ans)
            } else {
                r([])
            }
        } catch (e) {
            r([])
        }
    })
}
function getBlobInfo(scope) {
    console.log(store)
    let blobProfile
    if (scope == 'school') {
        blobProfile = store.state.user.schoolProfile
    } else if (scope == 'private') {
        blobProfile = store.state.user.userProfile
    }
    if (blobProfile) {
        let blobUrl = blobProfile.blob_uri
        let blobName = blobUrl.substring(blobUrl.lastIndexOf('/') + 1)
        let blobHost = blobUrl.substring(0, blobUrl.lastIndexOf('/'))
        let blobSas = blobProfile.blob_sas
        return {
            blobUrl, blobName, blobHost, blobSas
        }
    } else {
        return {}
    }
}

function setLocalLang() {
    // 自动根据浏览器系统语言设置语言(优先判断本地设置的语言，如果有则使用本地设置的语言，如果没有则使用浏览器系统语言)
    const curLang = localStorage.getItem('cloudSetting') ? JSON.parse(localStorage.getItem('cloudSetting')).curLang : null
    const navLang = curLang || navigator.language.toLowerCase()
    const localLang = (navLang === 'zh' || navLang === 'zh-tw' || navLang === 'zh-cn' || navLang === 'zh-hk') ? navLang : false
    let lang = localLang || 'en-us'
    localStorage.setItem('local', lang)
    return lang
}

export default {
    groupBy,
    isObjEqual,
    getIndex,
    getBtwRandom,
    compressImgByUrl,
    createVideoPoster,
    dataURLtoFile,
    fileToURL,
    debounce,
    throttle,
    formatBytes,
    uuid,
    findChartIndex,
    getGradeNameByYear,
    getGradeInfoByYear,
    getYearByGrade,
    dateFormat,
    timeFormat,
    getTeacherSubjects,
    checkJinNiu,
    checkTrain,
    handleStudentAnswer,
    getBlobInfo,
    setLocalLang
}