asdf.js

const fs = require('fs');
//We are creating functions so that we can call them in one line for seperate objects and functions to use
var fetchNotes = () => {
    try {
    var notesString = fs.readFileSync('notes-data.json');
    return JSON.parse(notesString);
    } catch (e) {
        return [];// This happens when try is an error so there is now smth to catch.
    }
};

var saveNotes = (notes) => {
    fs.writeFileSync('notes-data.json', JSON.stringify(notes));//(file name, string)
};

var addNote = (title, body) => {
    var notes = fetchNotes();
    var note = {
        title,
        body
    };
    var duplicateNotes = notes.filter((note) => note.title===title);

    if (duplicateNotes.length === 0) {
    notes.push(note);
    saveNotes(notes);
    return note;
    }
};

var getAll = () => {
    return fetchNotes();
};

var getNote = (title) => {
    var notes = fetchNotes();
    var filteredNotes = notes.filter((note) => note.title === title);
    return filteredNotes[0];
};

var removeNote = (title) => {
    var notes = fetchNotes();
    var filteredNotes = notes.filter((note) => note.title !== title);
    saveNotes(filteredNotes);

    return notes.length !== filteredNotes.length;
};

var logNote = (note) => {
    console.log('---');
    console.log(`Title: ${note.title}`);
    console.log(`Body: ${note.body}`);
};

module.exports = {
    addNote: addNote,
    getAll: getAll,
    getNote: getNote,
    removeNote: removeNote,
    logNote: logNote,
};
// module.exports.addNote = () => {
//     console.log('addNote');
//     return 'New note';
    
// };
// //Method one of writing this down
// module.exports.add = function add(a, b) {
//         return a+b;
// };

// //Method two of writing the above
// /*
// module.exports.add = (a, b) => {return a+b;};
// */