Synnefo

# Copyright 2012, 2013 GRNET S.A. All rights reserved.

#

# Redistribution and use in source and binary forms, with or

# without modification, are permitted provided that the following

# conditions are met:

#

#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

#

#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

# POSSIBILITY OF SUCH DAMAGE.

#

# The views and conclusions contained in the software and

# documentation are those of the authors and should not be

# interpreted as representing official policies, either expressed

# or implied, of GRNET S.A.

from datetime import datetime

import uuid

from django.core.validators import validate_email

from django.utils.timesince import timesince, timeuntil

from django.contrib.auth.models import Permission

from django.contrib.contenttypes.models import ContentType

from django.core.exceptions import FieldError

from django.core.management import CommandError

from synnefo.util import units

from synnefo.lib.ordereddict import OrderedDict

from astakos.im.models import AstakosUser

from astakos.im.resources import get_resources

DEFAULT_CONTENT_TYPE = None

def get_user(email_or_id, **kwargs):

    try:

        if email_or_id.isdigit():

            return AstakosUser.objects.get(id=int(email_or_id))

        else:

            return AstakosUser.objects.get(email__iexact=email_or_id, **kwargs)

    except AstakosUser.DoesNotExist, AstakosUser.MultipleObjectsReturned:

        return None

def format_bool(b):

    return 'YES' if b else 'NO'

def format_date(d):

    if not d:

        return ''

    if d < datetime.now():

        return timesince(d) + ' ago'

    else:

        return 'in ' + timeuntil(d)

def format_dict(d, level=1, ident=22):

    iteritems = d.iteritems()

    if not isinstance(d, OrderedDict):

        iteritems = sorted(iteritems)

    l = ['%s: %s\n' % (k.rjust(level*ident), format(v, level+1))

         for k, v in iteritems]

    l.insert(0, '\n')

    return ''.join(l)

def format_set(s):

    return list(s)

def format(obj, level=1, ident=22):

    if isinstance(obj, bool):

        return format_bool(obj)

    elif isinstance(obj, datetime):

        return format_date(obj)

    elif isinstance(obj, dict):

        return format_dict(obj, level, ident)

    elif isinstance(obj, set):

        return format_set(obj)

    else:

        return obj

def get_astakosuser_content_type():

    try:

        return ContentType.objects.get(app_label='im',

                                       model='astakosuser')

    except:

        return DEFAULT_CONTENT_TYPE

def add_user_permission(user, pname):

    content_type = get_astakosuser_content_type()

    if user.has_perm(pname):

        return 0, None

    p, created = Permission.objects.get_or_create(codename=pname,

                                                  name=pname.capitalize(),

                                                  content_type=content_type)

    user.user_permissions.add(p)

    return 1, created

def add_group_permission(group, pname):

    content_type = get_astakosuser_content_type()

    if pname in [p.codename for p in group.permissions.all()]:

        return 0, None

    content_type = ContentType.objects.get(app_label='im',

                                           model='astakosuser')

    p, created = Permission.objects.get_or_create(codename=pname,

                                                  name=pname.capitalize(),

                                                  content_type=content_type)

    group.permissions.add(p)

    return 1, created

def remove_user_permission(user, pname):

    content_type = get_astakosuser_content_type()

    if user.has_perm(pname):

        return 0

    try:

        p = Permission.objects.get(codename=pname,

                                   content_type=content_type)

        user.user_permissions.remove(p)

        return 1

    except Permission.DoesNotExist:

        return -1

def remove_group_permission(group, pname):

    content_type = get_astakosuser_content_type()

    if pname not in [p.codename for p in group.permissions.all()]:

        return 0

    try:

        p = Permission.objects.get(codename=pname,

                                   content_type=content_type)

        group.permissions.remove(p)

        return 1

    except Permission.DoesNotExist:

        return -1

def shortened(s, limit, suffix=True):

    length = len(s)

    if length <= limit:

        return s

    else:

        display = limit - 2

        if suffix:

            return '..' + s[-display:]

        else:

            return s[:display] + '..'

# Copied from snf-cyclades-app/synnefo/management/common.py

# It could be moved to snf-common

def filter_results(objects, filter_by):

    filter_list = filter_by.split(",")

    filter_dict = {}

    exclude_dict = {}

    def map_field_type(query):

        def fix_bool(val):

            if val.lower() in ("yes", "true", "t"):

                return True

            if val.lower() in ("no", "false", "f"):

                return False

            return val

        if "!=" in query:

            key, val = query.split("!=")

            exclude_dict[key] = fix_bool(val)

            return

        OP_MAP = {

            ">=": "__gte",

            "=>": "__gte",

            ">":  "__gt",

            "<=": "__lte",

            "=<": "__lte",

            "<":  "__lt",

            "=":  "",

        }

        for op, new_op in OP_MAP.items():

            if op in query:

                key, val = query.split(op)

                filter_dict[key + new_op] = fix_bool(val)

                return

    map(lambda x: map_field_type(x), filter_list)

    try:

        objects = objects.filter(**filter_dict)

        return objects.exclude(**exclude_dict)

    except FieldError as e:

        raise CommandError(e)

    except Exception as e:

        raise CommandError("Can not filter results: %s" % e)

def is_uuid(s):

    if s is None:

        return False

    try:

        uuid.UUID(s)

    except ValueError:

        return False

    else:

        return True

def is_email(s):

    if s is None:

        return False

    try:

        validate_email(s)

    except:

        return False

    else:

        return True

style_options = ', '.join(units.STYLES)

def check_style(style):

    if style not in units.STYLES:

        m = "Invalid unit style. Valid ones are %s." % style_options

        raise CommandError(m)

class ResourceDict(object):

    _object = None

    @classmethod

    def get(cls):

        if cls._object is None:

            cls._object = get_resources()

        return cls._object

def show_resource_value(number, resource, style):

    resource_dict = ResourceDict.get()

    unit = resource_dict[resource]['unit']

    return units.show(number, unit, style)

def show_quotas(qh_quotas, astakos_initial, info=None, style=None):

    labels = ('source', 'resource', 'base quota', 'total quota', 'usage')

    if info is not None:

        labels = ('uuid', 'email') + labels

    print_data = []

    for holder, holder_quotas in qh_quotas.iteritems():

        h_initial = astakos_initial.get(holder)

        if info is not None:

            email = info.get(holder, "")

        for source, source_quotas in holder_quotas.iteritems():

            s_initial = h_initial.get(source) if h_initial else None

            for resource, values in source_quotas.iteritems():

                initial = s_initial.get(resource) if s_initial else None

                initial = show_resource_value(initial, resource, style)

                limit = show_resource_value(values['limit'], resource, style)

                usage = show_resource_value(values['usage'], resource, style)

                fields = (source, resource, initial, limit, usage)

                if info is not None:

                    fields = (holder, email) + fields

                print_data.append(fields)

    return print_data, labels