CS4530 Spring 2022 Async Activity.ts

//Solution for way 1. This approach will enforce that students and their grades are created in order of appearance in the grades array:
export async function importGrades(gradesToImport: ImportTranscript[]): Promise<Transcript[]> {
  const insertedIDs = [];
  for (const student of gradesToImport) {
    const newStudent = await client.addStudent(student.studentName);
    insertedIDs.push(newStudent.studentID);
    for (const courseGrade of student.grades) {
      await client.addGrade(newStudent.studentID, courseGrade.course, courseGrade.grade);
    }
  }
  const transcripts = [];
  for (const studentID of insertedIDs) {
    transcripts.push(await client.getTranscript(studentID));
  }
  return transcripts;
}
//Solution for way 2: This enforces that each students’ grades appear in order of appearance in their grades array, but students might be created out of order
async function importGradesWay2(grades: ImportTranscript[]) {
  const insertedIDs = [];
  const promises = grades.map(async (student) => {
    const newStudent = await client.addStudent(student.studentName);
    insertedIDs.push(newStudent.studentID);
    for (const courseGrade of student.grades) {
      await client.addGrade(newStudent.studentID, courseGrade.course, courseGrade.grade);
    }
  });

  await Promise.all(promises);
  const transcripts = [];
  for(const studentID of insertedIDs){
    transcripts.push(await client.getTranscript(studentID));
  }
  return transcripts;
}
//Solution for way 3:  Does not enforce ordering of classes or grades. However, it’s the fastest.
async function importGradesWay3(grades: ImportTranscript[]) {
  const insertedIDs = [];
  const promises = grades.map(async (student) => {
    const newStudent = await client.addStudent(student.studentName);
    insertedIDs.push(newStudent.studentID);
    await Promise.all(student.grades.map(courseGrade => client.addGrade(newStudent.studentID, courseGrade.course, courseGrade.grade)));
  });

  await Promise.all(promises);
  const transcripts = [];
  for(const studentID of insertedIDs){
    transcripts.push(await client.getTranscript(studentID));
  }
  return transcripts;
}