[ NodeJs ] Json File Crud ( yargs )

README.md

run yargs file

node App.js add --title="List Item" --body="Sweater, pants, Jeans"

node App.js remove --title="List Item"

node App.js list

node dubugger

Run Command

node inspect App.js add --title="Clothes" --body="Sweater, pants"

hit in chrome

chrome://inspect

App.js

const yargs = require('yargs')
const notes = require('./notes.js')

// Customize yargs version
yargs.version('1.1.0')

// Create add command
yargs.command({
    command: 'add',
    describe: 'Add a new note',
    builder: {
        title: {
            describe: 'Note title',
            demandOption: true,
            type: 'string'
        },
        body: {
            describe: 'Note body',
            demandOption: true,
            type: 'string'
        }
    },
    handler: function (argv) {
        notes.addNote(argv.title, argv.body)
    }
})

// Create remove command
yargs.command({
    command: 'remove',
    describe: 'Remove a note',
    builder: {
        title: {
            describe: 'Note title',
            demandOption: true,
            type: 'string'
        }
    },
    handler: function (argv) {
        notes.removeNote(argv.title)
    }
})

// Create list command
yargs.command({
    command: 'list',
    describe: 'List your notes',
    handler: function () {
        notes.listNotes()
    }
})

// Create read command
yargs.command({
    command: 'read',
    describe: 'Read a note',
    builder: {
        title: {
            describe: 'Note title',
            demandOption: true,
            type: 'string'
        }
    },
    handler(argv) {
        notes.readNotes(argv.title)
    }
})

yargs.parse()
 

notes.js

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

const addNote = function (title, body) {
    const notes = loadNotes()
    const duplicateNotes = notes.filter(function (note) {
        return note.title === title
    })

    if (duplicateNotes.length === 0) {
        notes.push({
            title: title,
            body: body
        })
        saveNotes(notes)
        console.log('New note added!')
    } else {
        console.log('Note title taken!')
    }
}

const removeNote = function(title) {
    const notes = loadNotes()
    const notesToKeep = notes.filter(function(note) {
        return note.title !== title
    })
    if(notes.length > notesToKeep.length) {
        console.log(chalk.green.inverse("Not Removed"))
        saveNotes(notesToKeep)
    }
    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 readNotes = (title) => {
    const notes = loadNotes()
    const note = notes.find((nots) => nots.title === title)

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

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

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

module.exports = {
    addNote: addNote,
    removeNote: removeNote,
    listNotes: listNotes,
    readNotes: readNotes
}

notes.json

[
  { "title": "List Item", "body": "Sweater, pants, Jeans" },
  { "title": "List", "body": "Sweater, pants" },
  { "title": "List Item Found", "body": "Sweater, pants, Jeans" }
]

package.json

{
  "name": "abc",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "chalks": "^0.1.5",
    "yargs": "^15.3.1"
  }
}