Synnefo » ./kamaki

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

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# 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,

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

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

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

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# POSSIBILITY OF SUCH DAMAGE.

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# 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.

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:

        suffix = unicode(arg)

        try:

            while suffix[0] == '/':

                suffix = suffix[1:]

        except IndexError:

            continue

        if len(path) > 0 and path[-1] == '/':

            path += suffix

        else:

            path += '/' + suffix

    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 += '=%s' % params[name] if params[name] else result

        dlmtr = '&'

    return result

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

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

    ret = ''

    slist = sorted(alist)

    for item in slist:

        if 0 == slist.index(item):

            ret = unicode(item)

        else:

            ret += seperator + unicode(item)

    return ret

def dict2file(d, f, depth=0):

    for k, v in d.items():

        f.write('%s%s: ' % ('\t' * depth, k))

        if type(v) is dict:

            f.write('\n')

            dict2file(v, f, depth + 1)

        elif type(v) is list:

            f.write('\n')

            list2file(v, f, depth + 1)

        else:

            f.write(' %s\n' % unicode(v))

def list2file(l, f, depth=1):

    for item in l:

        if type(item) is dict:

            dict2file(item, f, depth + 1)

        elif type(item) is list:

            list2file(item, f, depth + 1)

        else:

            f.write('%s%s\n' % ('\t' * depth, unicode(item)))