tuancontact8/index.js

Contact Manager

#!/usr/bin/env node
//console.log('Hello, world!');
//var co = require('co');
//var prompt = require('co-prompt');
//var prompt = require('prompt');
const yargs = require("yargs");
const fs = require("fs");
//const readline = require('readline');
const readlineSync = require('readline-sync');

var argv = yargs.argv;
var command = argv._[0];


//read data from  "note-data.json"
var fetchNotes = () => {
    try{
        var notes = fs.readFileSync("note-data.json");
        return JSON.parse(notes);
    } catch(e){
        return [];
    }
}
//save file
var saveNotes = (arr) => {
    fs.writeFileSync("note-data.json", JSON.stringify(arr));
}

//read data file conten profle
var profiles;   
// add, list, read , remove, update
    if(command == "add"){
        console.log("Tuan");
        
        // profiles = fetchNotes();
        // var firstName = readlineSync.question('? Enter first name... ');
        // var lastName = readlineSync.question('? Enter last name... ');
        // var phoneNumber = readlineSync.question('? Enter phone number... ');
        // var email = readlineSync.question('? Enter email address... ');
        // /*Creat id */
        // var crypto = require("crypto");
        // var id = crypto.randomBytes(12).toString('hex');
        // /*Creat opject save a profile*/
        // var profile = {id, firstName, lastName, phoneNumber, email};
        // profiles.push(profile);
        // saveNotes(profiles);
        // console.log("New contact added"); 
    }else if(command == "list"){
        profiles = fetchNotes();
        console.log(profiles);
    }else if(command == "read"){
        profiles = fetchNotes();
        var flag = false;
        const findName = readlineSync.question('? Enter name need to find... ');
        for( i = 0; i< profiles.length; i++ ){
            if(profiles[i].firstName == findName ){
                flag = true;
                console.log("\n **********\n\n ",profiles[i], "\n");
            }
        }
        if(flag == false){console.log("Name does not exist!");}
    }else if(command == "remove"){
        profiles = fetchNotes();
        var flag1 = false;
        const findID = readlineSync.question('? Enter ID need to delete... ');
        for( i = 0; i< profiles.length; i++ ){
            if(profiles[i].id == findID ){
                flag1 = true;
                profiles.splice(i, 1);
                saveNotes(profiles);
                console.log("Delete successfully.");
                break;
            } 
        }
        if(flag1 == false){ console.log("ID does not exist!")}
    }else if(command == "update"){
        profiles = fetchNotes();
        var flag2 = false;
        var id;
        const findID1 = readlineSync.question('? Enter ID need to update... ');
        for( i = 0; i< profiles.length; i++ ){
            if(profiles[i].id == findID1 ){
                flag2 = true;
                console.log("Object need to update:\n  ",profiles[i]);
                profiles.splice(i, 1);
                console.log("\n ==============>");
                break;
            } 
        }
        if(flag2 == false){
            console.log("ID does not exist!");
        }else{
            id = findID1;
            var firstName = readlineSync.question('? Enter first name update... ');
            var lastName = readlineSync.question('? Enter last name update... ');
            var phoneNumber = readlineSync.question('? Enter phone number update... ');
            var email = readlineSync.question('? Enter email address update... ');
            var profile = {id, firstName, lastName, phoneNumber,email};
            profiles.push(profile);
            saveNotes(profiles);
            console.log("Update successful.");
        }
    }else {
        console.log("Invalid command, please try again!");
    }



//save file
// var saveNotes = (arr) => {
//     fs.writeFileSync("note-data.json", JSON.stringify(notes));
// }