All files / lib/md write.js

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'use strict';
const stream = require('stream');
const todo = require('../todo');
 
/*
 * PUBLIC API
 */
 
class Writer extends stream.Readable {
  constructor(object) {
    super('utf8');
    if (!(object instanceof todo.Project)) {
      throw new TypeError('Expecting object of type todo.Project');
    }
 
    this._object = object;
    this._state = 0;
    this._listCount = 0;
    this._itemCount = 0;
    this._currentList = null;
  }
 
  _read() {
    if (this._state === 0) {
      this.push(serializeParagraph(this._object.title, this._object.desc) + '\n');
      ++this._state;
      return;
    }
 
    Iif (this._state === -1) {
      this.push(null);
      return;
    }
 
    switch (this._state) {
      case 1:
        this._sendParagraph();
        break;
 
      case 2:
        this._sendList();
        break;
 
      default:
        this.emit('error', new Error('Internal error'));
        break;
    }
  }
 
  _sendParagraph() {
    if (this._listCount >= this._object.length) {
      this._state = -1;
      this.push(null);
      return;
    }
 
    this._currentList = this._object.getList(this._listCount++);
    this._itemCount = 0;
    this.push('#' + serializeParagraph(this._currentList.title, this._currentList.desc));
    ++this._state;
  }
 
  _sendList() {
    Iif (this._currentList === null) {
      this.emit('error', new TypeError('Internal error'));
      return;
    }
 
    if (this._itemCount >= this._currentList.length) {
      this.push('\n');
      --this._state;
      return;
    }
 
    this.push(serializeListItem(this._currentList.getItem(this._itemCount++)));
  }
}
 
/*
 * PRIVATE FUNCTIONS
 */
function serializeParagraph(title, desc) {
  Eif (desc.length !== 0) {
    return '# ' + title + '\n' + desc + '\n';
  }
  return '# ' + title + '\n';
}
 
function serializeListItem(item) {
  const status = item.done ? 'X' : ' ';
  return '  - [' + status + '] ' + item.value + '\n';
}
 
/*
 * MODULE EXPORTS
 */
module.exports = Writer;