model.js

'use strict';

function Init() {
  // Get current week's Monday.

  this.startingWeek = (function startingWeek() {
    const date = new Date();

    // If it's Sunday, start from the Sunday before

    if (date.getDay() === 0) {
      date.setDate(date.getDate() - 7);
    }

    // then set the date to Monday

    date.setDate((date.getDate() - date.getDay()) + 1);
    return date;
  }());

  this.days = {};

  this.addDay = function addDay(date) {
    this.days[date] = [];
  };

  /* Each studyBlock object contains a key, value representation of
     topic and state, where state is either "todo", for non completed
     study blocks, or "done" for completed study blocks. */

  this.addStudyBlock = function addStudyBlock(date, topic) {
    if (!Object.prototype.hasOwnProperty.call(this, topic)) {
      return false;
    }
    const studyBlock = {};
    studyBlock[String(topic)] = 'todo';
    this.days[date].push(studyBlock);
    return true;
  };

  // We only refer to the index as each day is an Array of studyBlock objects.
  this.checkStudyBlock = function checkStudyBlock(date, studyBlockIndex) {
    const topic = Object.keys(this.days[date][studyBlockIndex])[0];
    this.days[date][studyBlockIndex][topic] = 'done';
  };

  this.removeStudyBlock = function removeStudyBlock(date, studyBlock) {
    return this.days[date].splice(studyBlock, 1);
  };

  this.topics = {};

  this.addTopic = function addTopic(topic) {
    if (Object.prototype.hasOwnProperty.call(this.topics, topic)) {
      return false;
    }
    this.topics[topic] = {
      'goals': [],
      'sources': {},
      'comments': {},
      'blockscount': 0,
    };
    return true;
  };

  this.removeTopic = function removeTopic(topic) {
    if (this.topics[topic]) {
      return delete this.topics[topic];
    }
    return false;
  };

  // to do: swap even non consecutive topics.

  this.swapStudyBlocks = function swapStudyBlocks(date, studyBlockIndex, direction) {
    let dir = direction;
    const dateArray = this.days[date];
    if (dateArray.length === 1) {
      return date;
    }

    if (dir === 'up' && studyBlockIndex !== 0) {
      dir = parseInt(studyBlockIndex, 10) - 1;
    } else {
      dir = parseInt(studyBlockIndex, 10) + 1;
    }

    return dateArray.splice(dir, 1, dateArray.splice(studyBlockIndex, 1, dateArray[dir])[0]);
  };

  this.addGoal = function addGoal(topic, goalText) {
    this.topics[topic].goals.push({
      'description': goalText,
      'completed': false,
    });
  };

  this.addSource = function addSource(topic, source, link) {
    if (!Object.prototype.hasOwnProperty.call(this, topic)) {
      return false;
    }
    this.topics[topic].sources[source] = link;
    return true;
  };

  this.removeSource = function removeSource(topic, source) {
    delete this.topics[topic].sources[source];
  };

  this.addCount = function addCount(topic) {
    this.topics[topic].blockscount += 1;
  };

  this.addComment = function addComment(topic, title, comment) {
    if (!Object.prototype.hasOwnProperty.call(this, topic)) {
      return false;
    }
    this.topics[topic].comments[title] = comment;
    return true;
  };

  this.removeComment = function removeComment(topic, title) {
    delete this.topics[topic].comments[title];
  };
}