course.js

var cheerio = require("cheerio");
var Net = require("./net.js");
class Course {
  constructor(classId, courseid, user) {
    this.user = user;
    this.courseid = courseid;
    this.clazzId = classId;
  }
  async getChapters() {
    let data = [];

    let raw = await this.user.net.rawGet(
      `mycourse/studentstudycourselist?courseId=${this.courseid}&clazzid=${this.clazzId}`
    );

    let $ = cheerio.load(raw);
    let chaps = $(".cells");
    for (let i = 0; i < chaps.length; i++) {
      let chap = chaps.eq(i);

      let chaptitle = chap
        .find(".titlewords")
        .text()
        .replace(new RegExp("\t", "g"), "")
        .replace(new RegExp(" ", "g"), "")
        .replace(new RegExp("\n", "g"), " ");

      let subchaps = chap.find(".ncells");
      let chapid = chap.find("h3").attr("id");

      //console.log(chapid,chaptitle);
      let obj = {
        id: chapid,
        title: chaptitle,
        courseid: this.courseid,
        subchaps: [],
      };
      data.push(obj);
      for (let j = 0; j < subchaps.length; j++) {
        let subchap = subchaps.eq(j);
        let subtitle = subchap
          .find("a")
          .eq(0)
          .text()
          .replace(new RegExp("\t", "g"), "")
          .replace(new RegExp(" ", "g"), "")
          .replace(new RegExp("\n", "g"), " ");
        let idraw = subchap.find("h4").attr("id");
        if (!idraw) continue;

        let subid = idraw.replace("cur", "");
        let obj2 = {
          id: subid,
          title: subtitle,
          courseid: this.courseid,
          subchaps: [],
        };
        obj.subchaps.push(obj2);

        let subsubchaps = subchap.find(".ncells");

        for (let k = 0; k < subsubchaps.length; k++) {
          let subsubchap = subsubchaps.eq(k);
          let subsubtitle = subsubchap
            .find("a")
            .eq(0)
            .text()
            .replace(new RegExp("\t", "g"), "")
            .replace(new RegExp(" ", "g"), "")
            .replace(new RegExp("\n", "g"), " ");
          let subsubid = subsubchap.find("h5").attr("id").replace("cur", "");

          obj2.subchaps.push({
            id: subsubid,
            courseid: this.courseid,
            title: subsubtitle,
          });
        }

        //	console.log(subid,subtitle);
      }
    }

    //console.log(chaps);
    return data;
  }
  async getJobs(chapid) {
    //获取所有任务点

    //一个章节会有好几张卡片,遍历一遍

    let getCardVideos = async (num) => {
      let card = await this.user.net.rawGet(
        `knowledge/cards?clazzid=${this.clazzId}&courseid=${this.courseid}&knowledgeid=${chapid}&num=${num}`
      );
      //console.log(card,`knowledge/cards?clazzid=${this.clazzId}&courseid=${this.courseid}&knowledgeid=${chapid}`);
      let loc1 = card.indexOf("   mArg = ");
      let loc2 = card.indexOf(";\n}catch(e){");
      let raw = card.slice(loc1 + 10, loc2);
      try {
        let jobs = JSON.parse(raw);
        let def = jobs.defaults;
        //console.log(def);
        let videos = [];
        for (let i in jobs.attachments) {
          if (jobs.attachments[i].type == "video") {
            let o = jobs.attachments[i];
            o.chapid = chapid;
            o.ruri = def.reportUrl.replace("https://mooc1-1.chaoxing.com/", "");

            videos.push(o);
          } else videos.push(jobs.attachments[i]);
        }
        return videos;
      } catch (e) {
        throw "End of cards";
      }
    };

    let vds = [];
    let count = 0;
    do {
      let vd = [];
      try {
        vd = await getCardVideos(count);
      } catch (e) {
        break; //到达最终卡片
      }
      vds = vds.concat(vd);

      count++;
    } while (true);
    //console.log(`总共${count}页`);
    return vds;
  }
}

module.exports = Course;