Merge pull request #3 from luckymarmot/paw-2.3.3

Adapt to use the new import API

HARImporter.coffee

@@ -1,14 +1,60 @@
 HARImporter = ->
-  @importString = (context, stringToImport) ->
-    har = JSON.parse(stringToImport)
+
+  @canImport = (context, items) ->
+    a = 0
+    b = 0
+    for item in items
+      a += @_canImportItem(context, item)
+      b += 1
+    return if b > 0 then a/b else 0
+
+  @_canImportItem = (context, item) ->
+    try
+      har = JSON.parse(item.content)
+    catch error
+      return 0
+    if not (har and har.log and har.log.entries)
+      return 0
+    if har.log.entries.length > 0 and not har.log.entries[0].request
+      return 0
+    if har.log.version == '1.2'
+      return 1
+    return 0.9
+
+  @import = (context, items, options) ->
+    order = options?.order or null
+    parent = options?.parent or null
+    for item in items
+      @_importStringToGroup(context, item.content, {
+        parent: parent,
+        order: order,
+        groupName: item.file?.name or 'HAR file'
+      })
+      order += 1
+    return true
+
+  @importString = (context, str) ->
+    return @_importStringToGroup(context, str)
+
+  @_importStringToGroup = (context, str, options={}) ->
+    try
+      har = JSON.parse(str)
+    catch e
+      throw new Error('Invalid JSON for HAR import')
 
     # If the HAR was not valid JSON
     unless har or har.log or har.log.entries
       # To report an error, just throw a JavaScript Error
       throw new Error('Invalid input format (see https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/HAR/Overview.html)')
 
     # Create a request group
-    group = context.createRequestGroup('HAR import')
+    group = context.createRequestGroup(options.groupName or 'HAR file')
+
+    # Set parent and order of group
+    if options.parent
+      options.parent.appendChild(group)
+    if options.order and options.order >= 0
+      group.order = options.order
 
     for entry in har.log.entries
       # Create a request