jotzio/jotz

var fs = require('fs');
var jsf = require('jsonfile');
var ipc = require('ipc');
var dialog = require('dialog');
var utils = require('../utils/global');
var _ = require('underscore');

var NotesAPI = (function() {

  // Private API
  var api = {
    findNote: function(filename, cb) {
      utils.getNotesDirData(function(noteFilenames) {
        if (noteFilenames.indexOf(filename) >= 0) {
          cb(true);
        } else {
          cb(false);
        }
      });
    },
    noteFilename: function(noteId) {
      return noteId + '.json';
    },
    writeNote: function(filename, noteData, note, cb) {
      var filePath = utils.getNotesDirPath() + filename;
      var time = Date.now();
      noteData.createdAt = noteData.createdAt || time;
      noteData.updatedAt = time;
      jsf.writeFile(filePath, noteData, function(err) {
        if(!err) {
          note.attributes.createdAt = noteData.createdAt;
          note.attributes.updatedAt = noteData.updatedAt;
        }
        cb(err, note);
      });
    },
    getNotesData: function(filenames, cb) {
      var notes = [], count = filenames.length - 1;
      var cbOneTime = _.after(count, cb);
      filenames.forEach(function(filename) {
        var filepath = utils.getNotesDirPath() + filename;
        api.getNoteData(notes, filepath, cbOneTime);
      });
    },
    getNoteData: function(notes, filepath, cbOneTime) {
      jsf.readFile(filepath, function(err, note) {
        if (note) {
          notes.push(note);
          cbOneTime(notes);
        }
      });
    },
    destroyNoteData: function(filename, cb) {
      var filepath = utils.getNotesDirPath() + filename;
      fs.unlink(filepath, cb);
    },
    savePrompt: function() {
      return {
        type: 'info',
        buttons: ['Save Changes', 'Discard Changes'],
        message: 'Would you like to save your recent changes before closing this note?'
      };
    }
  };

  // Public API
  return {
    saveNote: function(note, cb) {
      note.attributes._id = note.attributes._id || utils.createGuid();
      var filename = api.noteFilename(note.attributes._id);
      api.findNote(filename, function() {
        api.writeNote(filename, note.attributes, note, cb);
      });
    },
    destroyNote: function(noteId, cb) {
      var filename = api.noteFilename(noteId);
      api.destroyNoteData(filename, cb);
    },
    destroyNotes: function(noteIds) {
      noteIds.forEach(function(noteId) {
        this.destroyNote(noteId);
      });
    },
    fetchNotes: function(cb) {
      utils.getNotesDirData(function(filenames) {
        api.getNotesData(filenames, cb);
      });
    },
    shouldSave: function(cb) {
      var result = dialog.showMessageBox(api.savePrompt());
      cb(result);
    }
  };

})();

module.exports = NotesAPI;