Calendar POC

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  
  /*
  	Notes:
      - dst
      - internationalization
      - timezones
      - leap year
  */
  
  init() {
    this._super(...arguments);
    
    const today = new Date();
    const todayDayOfYear = this.getDayOfYear(today);
    const dayOfWeek = today.getDay();

    let startingDayOfYear = todayDayOfYear;
    if (dayOfWeek > 0) {
      startingDayOfYear = todayDayOfYear - dayOfWeek;
    }

    const days = [];
    for (let dayOfYear = startingDayOfYear; dayOfYear < startingDayOfYear + 35; dayOfYear++) {
      days.push({
        dayOfYear,
        date: this.dateFromDay(today.getYear(), dayOfYear),
        isToday: dayOfYear === todayDayOfYear
      });
    }
    
    this.set('days', days);
  },
  
  getDayOfYear(date) {
    var start = new Date(date.getFullYear(), 0, 0);
    var diff = (date - start) + ((start.getTimezoneOffset() - date.getTimezoneOffset()) * 60 * 1000);
    var oneDay = 1000 * 60 * 60 * 24;
    var day = Math.floor(diff / oneDay);
    return day;
  },

  dateFromDay(year, day){
    var date = new Date(year, 0); // initialize a date in `year-01-01`
    return new Date(date.setDate(day)); // add the number of days
  }
});

my-calendar.calendar-day.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  
  tagName: 'li',
  
  classNameBindings: [ 'isToday', 'isLastMonth', 'isNextMonth' ],
  
  dayOfMonth: Ember.computed('model.date', function () {
  	return this.get('model.date').getDate();
  }),
  
  isToday: Ember.computed.reads('model.isToday'),
  
  isLastMonth: Ember.computed('model.date', function () {
  	return this.get('model.date').getMonth() < new Date().getMonth();
  }),
  
  isNextMonth: Ember.computed('model.date', function () {
  	return this.get('model.date').getMonth() > new Date().getMonth();
  })
  
});

my-calendar.calendar-day.template.hbs

{{dayOfMonth}}

my-calendar.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  tagName: 'ol',
  classNames: 'day-grid'
});

my-calendar.template.hbs

{{#each model as |day|}}
	{{my-calendar/calendar-day model=day}}
{{/each}}

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

ol {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  grid-gap: 1em;
  margin: 0 auto;
  max-width: 64em;
  padding: 0;
}

li {
  display: flex;
  align-items: center;
  justify-content: center;
  list-style: none;
  margin-left: 0;
  font-size: calc(16px + (21 - 16) * ((100vw - 300px) / (1600 - 300)));
}

ol.day-grid li {
  background-color: #fff;
  border: 1px solid #eaeaea;
  height: 12vw;
  max-height: 125px;
}

ol.day-grid li.is-last-month,
ol.day-grid li.is-next-month {
  color: lightgray
}

ol.day-grid li.is-today {
  background-color: lightgray
}

@media all and (max-width: 800px) {
  ul {
    grid-gap: .25em;
  }
}

templates.application.hbs

{{my-calendar model=days}}

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": true,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}