FE_occupationlab_server/src/pages/course/courseManagement/preview.vue

<template>
    <!--  课程预览  -->
    <div>
        <el-card shadow="hover" class="m-b-20">
            <div class="flex-between">
                <el-page-header @back="goBack" :content="'课程预览'"></el-page-header>
            </div>
        </el-card>

        <el-card shadow="hover" class="m-b-20">
            <div class="flex p-40">
                <div class="cover" :class="{'is-word': showMask1}">
                    <img v-if="coverUrl" :src="coverUrl" alt="" width="100%" height="100%">
                    <template v-else-if="iframeSrc">
                        <iframe class="inner fileIframe" id="fileIframe" :src="iframeSrc" frameborder="0"></iframe>
                        <template v-if="showMask">
                            <div class="mask" style="width: 500px;height: 30px;top: 53px;right: 320px"></div>
                            <div class="mask" style="width: 175px;height: 30px;top: 53px;right: 5px"></div>
                        </template>
                        <template v-if="showMask1">
                            <div class="word-mask" style="height: 40px;"></div>
                            <div class="word-mask2" style="top: 55px;left: 28%;width: 44%;height: calc(100% - 80px);"></div>
                        </template>
                        <template v-if="showMask2">
                            <div class="excel-mask1" style="height: 48px;"></div>
                        </template>
                    </template>
                    <div class="pdf inner" v-else-if="pdfSrc">
                        <p class="arrow">
                            <span @click="changePdfPage(0)" class="turn el-icon-arrow-left" :class="{grey: currentPage==1}"></span>
                            {{ currentPage }} / {{ pageCount }}
                            <span @click="changePdfPage(1)" class="turn el-icon-arrow-right" :class="{grey: currentPage==pageCount}"></span>
                        </p>
                        <pdf
                            class="pdf-wrap"
                            :src="pdfSrc"
                            :page="currentPage"
                            @num-pages="pageCount=$event"
                            @page-loaded="currentPage=$event"
                            @loaded="loadPdfHandler">
                        </pdf>
                    </div>
                    <div class="inner" v-else-if="playAuth">
                        <div class="video_wid" id="player"></div>
                    </div>
                </div>
                <div class="catalog flex-1">
                    <div class="list">
                        <h4 class="title">{{ courseName }}</h4>
                        <div class="desc-wrap">
                            <div class="desc" :class="{active: desShrink}" v-html="description"></div>
                            <i class="arrow" :class="{active: desShrink}" v-if="description.length > 40">
                                <span>...</span>
                                <img src="@/assets/img/arrow-down.png" alt="" @click="desShrink = !desShrink">
                            </i>
                        </div>
                        <div class="chapters">
                            <template v-if="videoList.length">
                                <div class="chapter" v-for="(item,index) in videoList" :key="index">
                                    <div class="chapterName">{{ item.name }}</div>
                                    <div class="section" v-if="item.subsectionList.length">
                                        <div class="sectionName" v-for="(section,i) in item.subsectionList" :key="i" @click="preview(section)">{{ section.name }}</div>
                                    </div>
                                </div>
                            </template>
                        </div>
                    </div>
                </div>
            </div>
        </el-card>
    </div>
</template>

<script>
import util from "@/libs/util";
import { mapState } from "vuex";
import pdf from "vue-pdf";
import "quill/dist/quill.core.css";
import "quill/dist/quill.snow.css";
import "quill/dist/quill.bubble.css";

export default {
    name: "coursePreview",
    data() {
        return {
            id: this.$route.query.id,
            video: "http://liuwanr.oss-cn-shenzhen.aliyuncs.com/mp4/20200519/1589871025648.mp4",
            videoSrc: "",
            videoList: [],
            courseName: "",
            description: "",
            coverUrl: "",
            playAuth: "",
            player: null,
            previewImg: "",
            iframeSrc: "",
            isWord: false,
            isPPT: false,
            isExcel: false,
            showMask: false,
            showMask1: false,
            showMask2: false,
            closePosi: {
                top: "80px"
            },
            pdfVisible: false,
            pdfSrc: "",
            currentPage: 0, // pdf文件页码
            pageCount: 0, // pdf文件总页数
            fileType: "pdf", // 文件类型
            desShrink: false
        };
    },
    components: { pdf },
    mounted() {
        this.insertScript();
        this.getData();
        this.getChapter();
    },
    methods: {
        goBack() {
            this.$router.back();
        },
        async getData() {
            let res = await this.$get(`${this.api.getCourse}/${this.id}`);
            this.courseName = res.course.name;
            this.description = res.course.description;
            this.coverUrl = res.course.coverUrl;
        },
        async getChapter() {
            let res = await this.$get(`${this.api.queryChaptersAndSubsections}/${this.id}`);
            this.videoList = res.chapterList;
        },
        insertScript() {
            const linkTag = document.createElement("link");
            linkTag.rel = "stylesheet";
            linkTag.href = "https://g.alicdn.com/de/prismplayer/2.8.2/skins/default/aliplayer-min.css";
            document.body.appendChild(linkTag);

            const scriptTag = document.createElement("script");
            scriptTag.type = "text/javascript";
            scriptTag.src = "https://g.alicdn.com/de/prismplayer/2.8.2/aliplayer-min.js";
            document.body.appendChild(scriptTag);
        },
        transferType(ext) {
            if ("jpg,jpeg,png,gif,svg,psd".includes(ext)) return "图片";
            if ("mp4,3gp,mov,m4v,avi,dat,mkv,flv,vob,rmvb,rm,qlv".includes(ext)) return "视频";
            return ext;
        },
        preview(row) {
            this.player = null;
            this.playauth = "";
            this.coverUrl = "";
            this.pdfSrc = "";
            this.iframeSrc = "";
            if (this.transferType(row.fileType) == "视频") {
                this.$get(`${this.api.getPlayAuth}/${row.fileId}`).then(res => {
                    this.playAuth = res.playAuth;
                    this.$nextTick(() => {
                        if (this.player) {
                            this.player.replayByVidAndPlayAuth(row.fileId, this.playAuth);
                        } else {
                            this.player = new Aliplayer({
                                id: "player",
                                width: "100%",
                                autoplay: false,
                                vid: row.fileId,
                                playauth: this.playAuth,
                                encryptType: 1 //当播放私有加密流时需要设置。
                            });
                        }
                    });

                }).catch(res => {
                });
            } else if (this.transferType(row.fileType) == "图片") {
                this.coverUrl = row.fileUrl;
            } else if (row.fileType == "pdf") {
                this.pdfSrc = row.fileUrl;
                this.pdfVisible = true;
            } else {
                this.$get(`${this.api.getSubsection}/${row.id}`).then(res => {
                    if (row.fileType == "pptx") {
                        this.isPPT = true;
                        this.isWord = false;
                        this.isExcel = false;
                    } else if (row.fileType == "doc" || row.fileType == "docx") {
                        this.isPPT = false;
                        this.isWord = true;
                        this.isExcel = false;
                    } else if (row.fileType == "xls" || row.fileType == "xlsx") {
                        this.isExcel = true;
                        this.isPPT = false;
                        this.isWord = false;
                    } else {
                        this.isPPT = false;
                        this.isWord = false;
                        this.isExcel = false;
                    }
                    if (this.isPPT) {
                        this.showMask = true;
                    } else {
                        this.showMask = false;
                    }
                    if (this.isWord) {
                        this.showMask1 = true;
                    } else {
                        this.showMask1 = false;
                    }
                    if (this.isExcel) {
                        this.showMask2 = true;
                    } else {
                        this.showMask2 = false;
                    }
                    this.iframeSrc = res.previewUrl;
                })
                    .catch(err => {
                    });
            }
        },
        closePlayer() {
            this.playAuth = "";
            this.player.pause();
        },
        closeIframe() {
            this.iframeSrc = "";
            this.showMask = false;
            this.showMask1 = false;
        },
        closePdf() {
            this.pdfSrc = "";
            this.currentPage = 1;
        },
        changePdfPage(val) {
            if (val === 0 && this.currentPage > 1) {
                this.currentPage--;
            }
            if (val === 1 && this.currentPage < this.pageCount) {
                this.currentPage++;
            }
        },
        loadPdfHandler(e) {
            this.currentPage = 1;
        }
    }
};
</script>

<style lang="scss" scoped>
$height: 700px;
.video_wid, .cover {
    position: relative;
    width: 76%;
    max-width: 1400px;
    height: $height !important;
    border: 0;
}

.cover {
    img {
        border-radius: 8px;
    }

    &.is-word {
        overflow: hidden;
    }
}

.fileIframe {
    height: $height !important;
}

.video_wid, .inner {
    width: 100%;
    height: 100% !important;
    border: 0;
    overflow: auto;
}

.cover.is-word {
    .inner {
        height: calc(100% + 38px) !important;
        margin-top: -38px;
    }
}

.video_wid:focus {
    outline: none;
}

.catalog {
    margin-left: 40px;
}

.list {
    height: $height;
    overflow-y: auto;
    padding: 24px 16px;
    background: #fff;

    .title {
        margin-bottom: 8px;
        color: rgba(0, 0, 0, 0.85);
        font-size: 20px;
    }

    .desc-wrap {
        position: relative;

        .desc {
            font-size: 14px;
            color: rgba(0, 0, 0, 0.65);
            line-height: 22px;
            @include mul-ellipsis(2);

            &.active {
                display: block;
                overflow: visible;
            }
        }

        .arrow {
            position: absolute;
            bottom: 2px;
            right: 0;
            display: flex;
            justify-content: space-between;
            width: 46px;
            background-color: #fff;

            span {
                font-size: 14px;
                color: rgba(0, 0, 0, 0.65);
            }

            img {
                width: 16px;
                cursor: pointer;
            }

            &.active {
                span {
                    opacity: 0;
                }

                img {
                    transform: rotate(180deg);
                }
            }
        }
    }

    .chapters {
        margin-top: 16px;
        max-height: calc(100% - 53px);
        overflow: auto;
    }

    .chapter {
        margin-bottom: 20px;

        .chapterName {
            color: rgba(0, 0, 0, 0.85);
            font-size: 16px;
        }

        .section {
            padding: 5px 15px;
            margin-top: 8px;
            background: rgba(0, 0, 0, 0.02);

            .sectionName {
                margin: 10px 0;
                font-size: 14px;
                color: rgba(0, 0, 0, 0.65);
                cursor: pointer;
                @include ellipsis;
            }
        }
    }
}

.el-image-viewer__wrapper {
    transform: translateY(-10px);
    transition: transform .5s;

    &.active {
        transform: translateY(0)
    }
}

.el-image-viewer__close {
    z-index: 2000;
    top: 15px;
    right: 15px;

    &.doc-close {
        i {
            color: #000 !important;
        }
    }
}

.list::-webkit-scrollbar {
    width: 4px;
}

.list::-webkit-scrollbar-thumb {
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.06);
}

.mask {
    z-index: 9;
    position: absolute;
    background-color: rgb(57, 58, 61);
}

.word-mask {
    z-index: 9;
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    background-color: rgb(243, 242, 241);
}

.word-mask1 {
    z-index: 9;
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    background-color: #185abd;
}

.word-mask2 {
    z-index: 9;
    position: absolute;
    background-color: transparent;
}

.excel-mask1 {
    z-index: 9;
    position: absolute;
    top: 0;
    left: 20%;
    width: 60%;
    background-color: #107c41;
}

/deep/ .pdf-dia {
    border-radius: 0 !important;

    .el-dialog__header {
        display: none;
    }

    .el-dialog__body {
        padding: 0;
    }

    .el-dialog__headerbtn {
        top: 10px;

        .el-dialog__close {
            color: #fff;
            font-size: 16px;
        }
    }
}

.pdf {
    .arrow {
        padding: 10px 0;
        display: flex;
        justify-content: center;
        align-items: center;
        font-size: 16px;
        color: #fff;
        background-color: #333;

        .turn {
            margin: 0 10px;
            font-size: 18px;
            cursor: pointer;
        }
    }

    .pdf-wrap {
        width: 80%;
        margin: 0 auto;
    }
}
</style>