gistfile1.txt

// Coding exercise:

// Complete the function getLessonsByStatus.
// That function should return all lessons grouped by the progress status for the requested userId.
// There is a commented example of what the function might return.
// You will get data from the getLessons and getProgress function.
// There are commented examples of what each function might return on success.
// Please explain your logic as you write code.
// The code does not need to run, but should be logically sound.

// const { get } = require("axios");

// async function getLessons() {
//   const response = await get("/lessons");
//   return response.data;
//   // Returns [ { lessonId: 1, title: 'NM 101' }, { lessonId: 2, title: 'NM 102' } ]
// }

// async function getProgress(userId) {
//   const response = await get(`/progress?userId=${userId}`);
//   return response.data;
//   // Returns [ { lessonId: 1, userId: 1, status: 'completed' } ]
//   // status can be 'completed', 'failed', 'in progress'
//   // No progress returned for a lesson that was not started
// }

async function getLessonsByStatus(userId) {
  // That function should return all lessons grouped by the progress status for the requested userId.
  // Returns lesson categorized by status

  // const aggregatedLessons;
  // const lessons= await getLessons()
  // lessons.then(allLessons=>
  // aggregatedLessons=[...allLessons])
  // const progressObjects= await getProgress(userId)

  // progressObjects.then(progressArray =>{
  //    progressArray.map(obj=>{
  //     if(obj.lessonId)
  //    })
  // })

  const result = {
    completed: [],
    failed: [],
    inProgress: [],
    notStarted: [],
  };

  const aggregatedLessons = [
    { lessonId: 1, title: "NM 101" },
    { lessonId: 2, title: "NM 102" },
    { lessonId: 3, title: "NM 202" },
    { lessonId: 4, title: "NM 402" },
  ];

  const progressObjects = [
    { lessonId: 1, userId: 1, status: "completed" },
    { lessonId: 2, userId: 1, status: "failed" },
    { lessonId: 3, userId: 1, status: "failed" },
  ];

  // Example format {
  //   completed: [ { lessonId: 1, title: 'NM 101' } ],
  //   failed: [],
  //   inProgress: [],
  //   notStarted: [ { lessonId: 2, title: 'NM 102' } ]
  // }

  aggregatedLessons.forEach((lesson) => {
    const relevantProgress = progressObjects.find(
      (progress) => progress.lessonId === lesson.lessonId
    );
    if (relevantProgress) {
      result[relevantProgress.status].push(lesson);
    } else {
      result.notStarted.push(lesson);
    }
  });
  return JSON.stringify(result);
}

console.log(getLessonsByStatus(1));