##
# Copyright (c) 2010-2017 Apple Inc. All rights reserved.
#
# 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.
##

from contrib.performance._event_change import measure as _measure
from contrib.performance._event_create import makeAttendees


def measure(host, port, dtrace, attendeeCount, samples):
    attendees = makeAttendees(attendeeCount)

    def addAttendees(event, i):
        """
        Add C{i} new attendees to the given event.
        """
        # Find the last CREATED line
        created = event.rfind('CREATED')
        # Insert the attendees before it.
        return event[:created] + ''.join(attendees) + event[created:]

    return _measure(
        host, port, dtrace, 0, samples, "add-attendee",
        addAttendees, eventPerSample=True)
