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grades.js
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grades.js
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const fs = require('fs')
// /add
const addGrade = (id, name, subject, grade, comment) => {
const grades = loadGrade()
const duplicateID = grades.filter((gradeData) => {
return gradeData.id === id
})
console.log(duplicateID)
if (duplicateID.length === 0) {
grades.push({
id: id,
name: name,
subject: subject,
grade: grade,
comment: comment
})
saveGrades(grades)
console.log('Saved Successfully')
}
else {
console.log('Error Duplicate ID')
}
}
// /load
const loadGrade =() =>{
try{
const dataBuffer = fs.readFileSync('grades.json').toString()
return JSON.parse(dataBuffer)
}
catch(e){
return []
}
}
// /save
const saveGrades =(grades) =>{
const information = JSON.stringify(grades) // [{"title":'aaa',"body":'aasd'},{"title":'titl2',"body":'body2'}]
fs.writeFileSync('grades.json',information)
}
// /remove
const removeGrade = (id) =>{
const grades = loadGrade()
const gradesToKeep = grades.filter((gradeData)=>{
return gradeData.id !== id
})
saveGrades(gradesToKeep)
console.log('Removed')
}
// /read
const readGrade = (id) => {
var grades = loadGrade()
const gradesToView = grades.find((gradesData) => {
return gradesData.id === id
})
if (gradesToView) {
console.log('Id: ' + gradesToView.id)
console.log('Name: ' + gradesToView.name+' || '+'Subject: ' + gradesToView.subject+' || '+'Grade: ' + gradesToView.grade)
if (gradesToView.comment){
console.log('Comments: ' + gradesToView.comment)
}else {
console.log('Comment: No Comments')
}
console.log('------------------------------------')
console.log(' ')
} else {
console.log('Not found ..Try Again?!')
}
}
// /list
const listGrade = () =>{
const grades = loadGrade()
grades.forEach((gradeData)=>{
console.log(gradeData.id+' || '+'The name of student is '+gradeData.name+' || '+'The grade is '+gradeData.grade)
console.log('------------------------------------')
console.log(' ')
})
}
// /for app.js
module.exports = {
addGrade,
removeGrade,
readGrade,
listGrade
}