Synnefo » ./kamaki

# Copyright 2011-2012 GRNET S.A. All rights reserved.

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# 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.

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# 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

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def matches(val1, val2, exactMath=True):

    """Case Insenstive match"""

    if exactMath:

        return True if val1.lower() == val2.lower() else False

    else:

        return True if val1.lower().startswith(val2.lower()) else False

def filter_out(d, prefix, exactMatch = False):

    """@return a dict that contains the entries of d that are NOT prefixed with prefic

    """

    ret = {}

    for key, val in d.items():

        if not matches(key, prefix, exactMath = exactMatch):

            ret[key] = val

    return ret

def filter_in(d, prefix, exactMatch = False):

    """@return a dict that contains only the entries of d that are prefixed with prefix

    """

    ret = {}

    for key, val in d.items():

        if matches(key, prefix, exactMath = exactMatch):

            ret[key] = val

    return ret

def prefix_keys(d, prefix):

    """@return a sallow copy of d with all its keys prefixed with prefix

    """

    ret = {}

    for key, val in d.items():

        ret[prefix+key] = val

    return ret

def path4url(*args):

    """@return a string with all args in the form /arg1/arg2/...

       @param args must be strings

    """

    path = ''

    for arg in args:

        path = path + '/' + unicode(arg)

    return path

def params4url(params):

    """@return a string with all params in the form ?key1=val1&key2=val2&...

            e.g. input

                {'key1':'val1', 'key2':None, 'key3':'val3'}

            will return

                ?key1=val1&key2&key3=val3

       @param should be a dict.

            Use params['somekey']=None for params that will apear without 

            a value at the final string

    """

    assert(type(params) is dict)

    result = ''

    dlmtr = '?'

    for name in params:

        result = result + dlmtr + name

        result = result + '=' + unicode(params[name]) if params[name] is not None else result

        dlmtr = '&'

    return result

def list2str(alist, seperator=','):

    """@return a string of comma seperated elements of the list"""

    ret = ''

    for item in sorted(alist):

        if 0 == alist.index(item):

            ret = unicode(item)

        else:

            ret += seperator+unicode(item)

    return ret