Quick access to useful timespans for reporting

mess.coffee

  selectors: ->     
    today = new Date()
    today.setMinutes(0)
    today.setHours(0)
    today.setSeconds(0)

    day   = 1000*60*60*24
    yesterday = today - day
    lastSunday = today - today.getDay() * day

    firstOfMonth = (date) ->
      date - day * new Date(date).getDate() + day

    beginningOfMonth = firstOfMonth(today)
    endOfMonth = firstOfMonth(beginningOfMonth + 31 * day) - day
    endOfLastMonth = beginningOfMonth - day
    beginningOfLastMonth = firstOfMonth(endOfLastMonth)

    return {
      "Yesterday": [yesterday, yesterday],
      "Last 7 days": [yesterday - 7 * day, yesterday]
      "This Week": [lastSunday, lastSunday + 7 * day]
      "Last Week": [lastSunday - 7 * day, lastSunday]
      "This Month": [beginningOfMonth, endOfMonth]
      "Last Month": [beginningOfLastMonth, endOfLastMonth]
    }