Application Completed

app.js

@@ -0,0 +1,47 @@
+const fs=require('fs');
+const _ = require('lodash');
+const yargs = require('yargs');
+
+const notes = require('./notes.js');
+
+var argv = yargs.argv;
+var command = argv._[0];
+
+
+// console.log('Process', process.argv);
+// console.log('Yargs', argv);
+
+if(command == 'add'){
+    var note = notes.addNote(argv.title, argv.body);
+    if(note){
+        console.log('Note Created');
+        notes.logNote(note);
+    }else{
+        console.log("Note title taken");
+    }
+}else if(command === 'list'){
+    var allNotes = notes.getAll();
+    console.log(`Printing ${allNotes.length} note(s)`);
+    allNotes.forEach(note => notes.logNote(note));
+}else if(command === 'read'){
+    var note = notes.getNote(argv.title);
+    if(note){
+        console.log('Note Found');
+        notes.logNote(note);
+    }else{
+        console.log("Note Not Found");
+    }
+}else if(command === 'remove'){
+    var removed = notes.removeNote(argv.title);
+    if(removed){
+        console.log('Removed Note');
+        console.log('--');
+        console.log(`Title: ${argv.title}`);
+        console.log(`Body: ${argv.body}`);
+    }else{
+        console.log('Note Not Found');
+    }
+
+}else{
+    console.log('Command not recognised');
+}

notes-data.json

@@ -0,0 +1 @@
+[{"title":"Secret1","body":"Note 1"},{"title":"Secret2","body":"Note 2"},{"title":"Secret3","body":"Note 2"}]

notes.js

@@ -0,0 +1,70 @@
+const fs = require('fs');
+
+var fetchNotes = () => {
+    try{
+        var notesString = fs.readFileSync('notes-data.json');
+        return JSON.parse(notesString);
+    }catch(e){
+        return [];
+    }   
+}
+
+var saveNote = (notes) => {
+    fs.writeFileSync('notes-data.json',JSON.stringify(notes));
+}
+
+var addNote = (title, body) => {
+    notes = [];
+    note = {
+        title,
+        body
+    }
+
+    notes = fetchNotes();
+
+    var duplicateNotes = notes.filter((note) => note.title === title);
+
+    if(duplicateNotes.length === 0){
+    notes.push(note);
+    saveNote(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);
+
+    saveNote(filteredNotes);
+
+    return notes.length !== filteredNotes.length;
+
+}
+
+    var logNote = (note) => {
+        debugger;
+        console.log('--');
+        console.log(`Title: ${note.title}`);
+        console.log(`Body: ${note.body}`);
+    }
+
+module.exports = {
+    addNote,
+    getAll,
+    getNote,
+    removeNote,
+    logNote
+}