Synnefo

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from optparse import make_option

from django.core.management.base import BaseCommand, CommandError

from astakos.im.functions import (terminate, suspend, resume, check_expiration,

                                  approve_application, deny_application)

from synnefo.lib.db.transaction import commit_on_success_strict

class Command(BaseCommand):

    help = "Manage projects and applications"

    option_list = BaseCommand.option_list + (

        make_option('--approve',

                    dest='approve',

                    metavar='<application id>',

                    help="Approve a project application"),

        make_option('--deny',

                    dest='deny',

                    metavar='<application id>',

                    help="Deny a project application"),

        make_option('--terminate',

                    dest='terminate',

                    metavar='<project id>',

                    help="Terminate a project"),

        make_option('--suspend',

                    dest='suspend',

                    metavar='<project id>',

                    help="Suspend a project"),

        make_option('--unsuspend',

                    dest='resume',

                    metavar='<project id>',

                    help="Resume a suspended project"),

        make_option('--check-expired',

                    action='store_true',

                    dest='check_expired',

                    default=False,

                    help="Check projects for expiration"),

        make_option('--terminate-expired',

                    action='store_true',

                    dest='terminate_expired',

                    default=False,

                    help="Terminate all expired projects"),

        make_option('--message', '-m',

                    dest='message',

                    metavar='<msg>',

                    help=("Specify reason of action, "

                          "e.g. when denying a project")),

    )

    def handle(self, *args, **options):

        message = options['message']

        pid = options['terminate']

        if pid is not None:

            self.run_command(terminate, pid)

            return

        pid = options['resume']

        if pid is not None:

            self.run_command(resume, pid)

            return

        pid = options['suspend']

        if pid is not None:

            self.run_command(suspend, pid)

            return

        appid = options['approve']

        if appid is not None:

            self.run_command(approve_application, appid)

            return

        appid = options['deny']

        if appid is not None:

            self.run_command(deny_application, appid, message)

            return

        if options['check_expired']:

            self.expire(execute=False)

            return

        if options['terminate_expired']:

            self.expire(execute=True)

    def run_command(self, func, *args):

        @commit_on_success_strict()

        def inner():

            try:

                func(*args)

            except BaseException as e:

                raise CommandError(e)

        inner()

    def print_expired(self, projects, execute):

        length = len(projects)

        if length == 0:

            s = 'No expired projects.\n'

        elif length == 1:

            s = '1 expired project:\n'

        else:

            s = '%d expired projects:\n' % (length,)

        self.stdout.write(s)

        if length > 0:

            labels = ('Project', 'Name', 'Status', 'Expiration date')

            columns = (10, 30, 14, 30)

            line = ' '.join(l.rjust(w) for l, w in zip(labels, columns))

            self.stdout.write(line + '\n')

            sep = '-' * len(line)

            self.stdout.write(sep + '\n')

            for project in projects:

                line = ' '.join(f.rjust(w) for f, w in zip(project, columns))

                self.stdout.write(line + '\n')

            if execute:

                self.stdout.write('%d projects have been terminated.\n' % (

                    length,))

    @commit_on_success_strict()

    def expire(self, execute=False, ctx=None):

        try:

            projects = check_expiration(execute=execute)

            self.print_expired(projects, execute)

        except BaseException as e:

            if ctx:

                ctx.mark_rollback()

            raise CommandError(e)