notes.js

const fs = require('fs')
const chalk = require('chalk')

const addNote = (title, body) => {
    const notes = loadNotes()
    const duplicateNote = notes.find((note) => note.title === title)

    if (!duplicateNote) {
        notes.push({
            title: title,
            body: body
        })
        saveNotes(notes)
        console.log(chalk.green.inverse('New note added!'))
    } else {
        console.log(chalk.red.inverse('Note title taken!'))
    }
}

const removeNote=function (title) {
    const notes = loadNotes()
    console.log(title)
    const notesToKeep=notes.filter(function(note){
        return note.title !== title
    })
    if(notes.length > notesToKeep.length){
        saveNotes(notesToKeep)
        console.log(chalk.green.inverse('Note Removed!'))
    }else{
        console.log(chalk.red.inverse('No Note Found!'))
    }

}

// const listNotes = () => {
//     const notes = loadNotes()

//     console.log(chalk.inverse('Your notes'))

//     notes.forEach((note) => {
//         console.log(note.title)
//     })
// }

// const readNote = (title) => {
//     const notes = loadNotes()
//     const note = notes.find((note) => note.title === title)

//     if (note) {
//         console.log(chalk.inverse(note.title))
//         console.log(note.body)
//     } else {
//         console.log(chalk.red.inverse('Note not found!'))
//     }
// }


const listNote =() => {
    const notes = loadNotes()
    console.log(chalk.inverse("Your Notes are :"))
    notes.forEach(note => console.log(note.title))
}

const readNote=(title) => {
    const notes = loadNotes()
    const note = notes.find(note => (note.title === title))
    if(note){
        console.log(chalk.green.inverse(note.body))
    }else{
        console.log(chalk.red.inverse("note not found"))
    }
}

const saveNotes = (notes) => {
    const dataJSON = JSON.stringify(notes)
    fs.writeFileSync('notes.json', dataJSON)
}

const loadNotes = () => {
    // const dataBuffer=fs.readFileSync('notes.json')
    // const dataJSON=dataBuffer.toString()
    // return JSON.parse(dataJSON)

    try {
        const dataBuffer = fs.readFileSync('notes.json')
        const dataJSON = dataBuffer.toString()
        return JSON.parse(dataJSON)
    } catch (e) {
        return []
    }
}



module.exports = {
    addNote: addNote,
    removeNote: removeNote,
    listNote: listNote,
    readNote: readNote
}