Synnefo

from synnefo.webproject.management.util import pprint_table

from synnefo.webproject.management.util import format_bool, format_date

from synnefo.management.common import (format_vm_state, get_vm,

from synnefo.management.common import check_backend_credentials

from synnefo.webproject.management.util import pprint_table

from synnefo.webproject.management.util import parse_bool

from synnefo.management.common import (get_backend, check_backend_credentials)

            backend.drained = parse_bool(options['drained'], strict=True)

            backend.offline = parse_bool(options['offline'], strict=True)

from synnefo.webproject.management.util import pprint_table

from synnefo.webproject.management.util import pprint_table

import sys

from synnefo.webproject.management import util

# Use backported unittest functionality if Python < 2.7

try:

    import unittest2 as unittest

except ImportError:

    if sys.version_info < (2, 7):

        raise Exception("The unittest2 package is required for Python < 2.7")

    import unittest

class ParseFiltersTestCase(unittest.TestCase):

    def test_parse_empty(self):

        res = util.parse_filters("")

        self.assertEqual(res, ({}, {}))

    def test_parse_one(self):

        res = util.parse_filters("x=2")

        self.assertEqual(res, ({"x": "2"}, {}))

        res = util.parse_filters("x!=2")

        self.assertEqual(res, ({}, {"x": "2"}))

    def test_parse_many(self):

        res = util.parse_filters("x=2,x>=3,y!=4,z<3")

        filters = {"x": "2", "x__gte": "3", "z__lt": "3"}

        excludes = {"y": "4"}

        self.assertEqual(res, (filters, excludes))

# 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

from django.utils.timesince import timesince, timeuntil

from synnefo.util.text import uenc, udec

def parse_bool(value, strict=True):

    """Convert a string to boolen value.

    If string is True, then ValueError will be raised, if the string can not be

    converted to boolean. Otherwise the string will be returned as is.

    """

    if value.lower() in ("yes", "true", "t", "1"):

        return True

    if value.lower() in ("no", "false", "f", "0"):

        return False

    if strict:

        raise ValueError("Can convert '%s' to boolean value")

    else:

        return value

def format_bool(b):

    """Convert a boolean value to YES or NO."""

    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 parse_filters(filter_by):

    """Parse a string into lookup parameters for QuerySet.filter(**kwargs).

    This functions converts a string of comma-separated key 'cond' val triples

    to two dictionaries, containing lookup parameters to be used for filter

    and exclude functions of QuerySet.

    e.g. filter_by="foo>=2, baz!=4" -> ({"foo__gte": "2"}, {"baz": "4"})

    """

    filter_dict = {}

    exclude_dict = {}

    filter_list = filter_by.split(",")

    def map_field_type(query):

        if "!=" in query:

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

            exclude_dict[key] = parse_bool(val, strict=False)

            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] = parse_bool(val, strict=False)

                return

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

    return (filter_dict, exclude_dict)

def pprint_table(out, table, headers=None, separator=None):

    """Print a pretty, aligned string representation of table.

    Works by finding out the max width of each column and padding to data

    to this value.

    """

    assert(isinstance(table, (list, tuple))), "Invalid table type"

    sep = separator if separator else "  "

    if headers:

        assert(isinstance(headers, (list, tuple))), "Invalid headers type"

        table.insert(0, headers)

    def strignify(obj):

        if isinstance(obj, (unicode, str)):

            return udec(obj)

        else:

            return str(obj)

    table = [map(strignify, row) for row in table]

    # Find out the max width of each column

    widths = [max(map(len, col)) for col in zip(*table)]

    t_length = sum(widths) + len(sep) * (len(widths) - 1)

    if headers:

        # pretty print the headers

        line = sep.join(uenc(v.rjust(w)) for v, w in zip(headers, widths))

        out.write(line + "\n")

        out.write("-" * t_length + "\n")

        # remove headers

        table = table[1:]

    # print the rest table

    for row in table:

        line = sep.join(uenc(v.rjust(w)) for v, w in zip(row, widths))

        out.write(line + "\n")