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# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
# vim: set filetype=python:
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.


@template
def keyfile(desc, default=None, help=None, callback=lambda x: x):
    help = help or (
        "Use the secret key contained in the given keyfile " "for %s requests" % desc
    )
    name = desc.lower().replace(" ", "-")
    no_key = callback("no-%s-key" % name)

    option("--with-%s-keyfile" % name, nargs=1, default=default, help=help)

    @depends("--with-%s-keyfile" % name)
    @checking("for the %s key" % desc, lambda x: x and x is not no_key)
    @imports(_from="__builtin__", _import="open")
    @imports(_from="__builtin__", _import="IOError")
    def keyfile(value):
        if value:
            try:
                with open(value[0]) as fh:
                    result = fh.read().strip()
                    if result:
                        return callback(result)
                    raise FatalCheckError("'%s' is empty." % value[0])
            except IOError as e:
                raise FatalCheckError("'%s': %s." % (value[0], e.strerror))
        return no_key

    return keyfile


@template
def simple_keyfile(desc, default=None):
    value = keyfile(desc, default=default)
    set_config("MOZ_%s_KEY" % desc.upper().replace(" ", "_"), value)


@template
def id_and_secret_keyfile(desc, default=None):
    def id_and_secret(value):
        if value.startswith("no-") and value.endswith("-key"):
            id = value[:-3] + "clientid"
            secret = value
        elif " " in value:
            id, secret = value.split(" ", 1)
        else:
            raise FatalCheckError("%s key file has an invalid format." % desc)
        return namespace(
            id=id,
            secret=secret,
        )

    content = keyfile(
        desc,
        help="Use the client id and secret key contained "
        "in the given keyfile for %s requests" % desc,
        default=default,
        callback=id_and_secret,
    )

    name = desc.upper().replace(" ", "_")
    set_config("MOZ_%s_CLIENTID" % name, content.id)
    set_config("MOZ_%s_KEY" % name, content.secret)