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- # time-interval.coffee

- ¶

  Copyright 2013 The Apache Software Foundation

  Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

      http:#www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

- ¶

  ## t5/core/time-interval

  Used with the Interval component to express the interval between two timestamps, or the dynamic difference between now and an end point in the past or future.

      define ["./dom", "./moment"],
      (dom, moment) ->

        ATTR = "data-timeinterval"

        DEFAULT_FORMAT = 'YYYY-MM-DDTHH:mm:ss.SSSZ'

        toMoment = (s) -> if s then (moment s, DEFAULT_FORMAT) else moment()

        updateElement = (el) ->
          start = toMoment el.attr "data-timeinterval-start"
          end = toMoment el.attr "data-timeinterval-end"
          plain = el.attr "data-timeinterval-plain"

          el.update end.from start, plain
          return

        updateDynamics = ->
          for el in dom.body.find "[#{ATTR}=dynamic]"
            updateElement el
          return

- ¶

  Update any dynamic intervals (the ones without a specific start date) about once a second

        setInterval updateDynamics, 1000

        dom.scanner "[#{ATTR}=true]", (el) ->

          updateElement el

          if (el.attr "data-timeinterval-start") and (el.attr "data-timeinterval-end")
            el.attr ATTR, null
          else
            el.attr ATTR, "dynamic"

          return

        return # no exports