wekan/client/components/cards/cardDate.js

// Edit start & due dates
Template.dateBadge.helpers({
  canModifyCard() {
    return Meteor.user() && Meteor.user().isBoardMember() && !Meteor.user().isCommentOnly();
  },
});

// editCardStartDatePopup
(class extends DatePicker {
  onCreated() {
    super.onCreated();
    this.data().startAt && this.date.set(moment(this.data().startAt));
  }

  _storeDate(date) {
    this.card.setStart(date);
  }

  _deleteDate() {
    this.card.unsetStart();
  }
}).register('editCardStartDatePopup');

// editCardDueDatePopup
(class extends DatePicker {
  onCreated() {
    super.onCreated();
    this.data().dueAt && this.date.set(moment(this.data().dueAt));
  }

  onRendered() {
    super.onRendered();
    if (moment.isDate(this.card.startAt)) {
      this.$('.js-datepicker').datepicker('setStartDate', this.card.startAt);
    }
  }

  _storeDate(date) {
    this.card.setDue(date);
  }

  _deleteDate() {
    this.card.unsetDue();
  }
}).register('editCardDueDatePopup');


// Display start & due dates
const CardDate = BlazeComponent.extendComponent({
  template() {
    return 'dateBadge';
  },

  onCreated() {
    const self = this;
    self.date = ReactiveVar();
    self.now = ReactiveVar(moment());
    window.setInterval(() => {
      self.now.set(moment());
    }, 60000);
  },

  showDate() {
    // this will start working once mquandalle:moment
    // is updated to at least moment.js 2.10.5
    // until then, the date is displayed in the "L" format
    return this.date.get().calendar(null, {
      sameElse: 'llll',
    });
  },

  showISODate() {
    return this.date.get().toISOString();
  },
});

class CardStartDate extends CardDate {
  onCreated() {
    super.onCreated();
    const self = this;
    self.autorun(() => {
      self.date.set(moment(self.data().startAt));
    });
  }

  classes() {
    if (this.date.get().isBefore(this.now.get(), 'minute') &&
        this.now.get().isBefore(this.data().dueAt)) {
      return 'current';
    }
    return '';
  }

  showTitle() {
    return `${TAPi18n.__('card-start-on')} ${this.date.get().format('LLLL')}`;
  }

  events() {
    return super.events().concat({
      'click .js-edit-date': Popup.open('editCardStartDate'),
    });
  }
}
CardStartDate.register('cardStartDate');

class CardDueDate extends CardDate {
  onCreated() {
    super.onCreated();
    const self = this;
    self.autorun(() => {
      self.date.set(moment(self.data().dueAt));
    });
  }

  classes() {
    if (this.now.get().diff(this.date.get(), 'days') >= 2)
      return 'long-overdue';
    else if (this.now.get().diff(this.date.get(), 'minute') >= 0)
      return 'due';
    else if (this.now.get().diff(this.date.get(), 'days') >= -1)
      return 'almost-due';
    return '';
  }

  showTitle() {
    return `${TAPi18n.__('card-due-on')} ${this.date.get().format('LLLL')}`;
  }

  events() {
    return super.events().concat({
      'click .js-edit-date': Popup.open('editCardDueDate'),
    });
  }
}
CardDueDate.register('cardDueDate');

(class extends CardStartDate {
  showDate() {
    return this.date.get().format('l');
  }
}).register('minicardStartDate');

(class extends CardDueDate {
  showDate() {
    return this.date.get().format('l');
  }
}).register('minicardDueDate');