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- # alert.coffee

- ¶

  Copyright 2012-2013 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/alert

  Support for the core/Alerts components.

      define ["./dom", "./console", "./messages", "./ajax", "underscore", "./bootstrap"],
        (dom, console, messages, ajax, _, {glyph}) ->

          severityToClass =
            info: "alert-info"
            success: "alert-success"
            warn: "alert-warning"
            error: "alert-danger"

          getURL = (container) -> container.attr "data-dismiss-url"

          removeAlert = (container, alert) ->
            alert.remove()

            if container.find(".alert").length is 0
              container.update null

          dismissAll = (container) ->

            alerts = container.find "[data-alert-id]"

            if alerts.length is 0
              container.update null
              return

            ajax (getURL container),
              success: -> container.update null

          dismissOne = (container, button) ->

            alert = button.parent()

            id = alert.attr "data-alert-id"

            unless id
              removeAlert container, alert
              return

            ajax (getURL container),
              data: { id }
              success: -> removeAlert container, alert

          setupUI = (outer) ->

            outer.update """
              <div data-container-type="inner"></div>
            """

            if (outer.attr "data-show-dismiss-all") is "true"
              outer.append """
               <div class="pull-right">
                  <button class="btn btn-xs btn-default" data-action="dismiss-all">
                    #{glyph "remove"}
                    #{messages "core-dismiss-label"}
                  </button>
                </div>
               """

            outer.on "click", "[data-action=dismiss-all]", ->
              dismissAll outer
              return false

            outer.on "click", "button.close", ->
              dismissOne outer, this
              return false

          findInnerContainer = ->
            outer = dom.body.findFirst "[data-container-type=alerts]"

            unless outer
              console.error "Unable to locate alert container element to present an alert."
              return null

- ¶

  Set up the inner content when needed

            unless outer.element.firstChild
              setupUI outer

            return outer?.findFirst "[data-container-type=inner]"

- ¶

  The `data` for the alert has a number of keys to control its behavior:

  - severity - used to determine the CSS class, may be “warn”, “error”, or “info” (the default)
  - message - message to display to as te alert’s body
  - markup - if true, then the message contains markup that should not be HTML escaped

          alert = (data) ->

            container = findInnerContainer()

            return unless container

- ¶

  Map from severity name to a CSS class; using alert-info if no severity, or unknown severity

            className = severityToClass[data.severity] or "alert-info"

            content = if data.markup then data.message else _.escape data.message

- ¶

  Note that `data-dismiss=alert` is purposely excluded

  - we want to handle closes w/ notifications to the server if not transient
  - we don’t want to rely on bootstrap.js, as that will drag jQuery into the application Also, the tag makes it easier to pull out just the content when doing tests, but we only add this add if the alert doesn’t have a message that contains markup (TAP5-1863)

            element = dom.create "div",
              "data-alert-id": data.id
              class: "alert alert-dismissable " + className
              if data.markup
                """
                  <button type="button" class="close">&times;</button>
                  #{content}
                  """
              else
                """
                  <button type="button" class="close">&times;</button>
                  <span>#{content}</span>
                  """

            container.append element

            if data['transient']
              outerContainer = container.findParent '[data-container-type=alerts]'
              _.delay removeAlert, exports.TRANSIENT_DURATION, outerContainer, element

          alert.TRANSIENT_DURATION = 5000

- ¶

  Export the alert function

          exports = alert