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Shared_Functions.py
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Sun, Aug 25, 03:52

Shared_Functions.py
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## $Id$
## This file is part of CDS Invenio.
## Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 CERN.
##
## CDS Invenio is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## CDS Invenio is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with CDS Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""Functions shared by websumit_functions"""
__revision__ = "$Id$"
from invenio.config import \
CFG_PATH_ACROREAD, \
CFG_PATH_CONVERT, \
CFG_PATH_DISTILLER, \
CFG_PATH_GUNZIP, \
CFG_PATH_GZIP
import re
import os
def createRelatedFormats(fullpath):
"""Given a fullpath, this function extracts the file's extension and
finds in which additional format the file can be converted and converts it.
@param fullpath: (string) complete path to file
Return a list of the paths to the converted files
"""
createdpaths = []
basedir = os.path.dirname(fullpath)
filename = os.path.basename(fullpath)
filename, extension = os.path.splitext(filename)
extension = extension.lower()
if extension == ".pdf":
# Create PostScript
os.system("%s -toPostScript %s" % (CFG_PATH_ACROREAD, fullpath))
if os.path.exists("%s/%s.ps" % (basedir, filename)):
os.system("%s %s/%s.ps" % (CFG_PATH_GZIP, basedir, filename))
createdpaths.append("%s/%s.ps.gz" % (basedir, filename))
if extension == ".ps":
# Create PDF
os.system("%s %s %s/%s.pdf" % (CFG_PATH_DISTILLER, fullpath, \
basedir, filename))
if os.path.exists("%s/%s.pdf" % (basedir, filename)):
createdpaths.append("%s/%s.pdf" % (basedir, filename))
if extension == ".ps.gz":
#gunzip file
os.system("%s %s" % (CFG_PATH_GUNZIP, fullpath))
# Create PDF
os.system("%s %s/%s.ps %s/%s.pdf" % (CFG_PATH_DISTILLER, basedir, \
filename, basedir, filename))
if os.path.exists("%s/%s.pdf" % (basedir, filename)):
createdpaths.append("%s/%s.pdf" % (basedir, filename))
#gzip file
os.system("%s %s/%s.ps" % (CFG_PATH_GZIP, basedir, filename))
return createdpaths
def createIcon(fullpath, iconsize):
"""Given a fullpath, this function extracts the file's extension and
if the format is compatible it converts it to icon.
@param fullpath: (string) complete path to file
Return the iconpath if successful otherwise None
"""
basedir = os.path.dirname(fullpath)
filename = os.path.basename(fullpath)
filename, extension = os.path.splitext(filename)
if extension == filename:
extension == ""
iconpath = "%s/icon-%s.gif" % (basedir, filename)
if os.path.exists(fullpath) and extension.lower() in ['.pdf', '.gif', '.jpg', '.jpeg', '.ps']:
os.system("%s -scale %s %s %s" % (CFG_PATH_CONVERT, iconsize, fullpath, iconpath))
if os.path.exists(iconpath):
return iconpath
else:
return None
def get_dictionary_from_string(dict_string):
"""Given a string version of a "dictionary", split the string into a
python dictionary.
For example, given the following string:
{'TITLE' : 'EX_TITLE', 'AUTHOR' : 'EX_AUTHOR', 'REPORTNUMBER' : 'EX_RN'}
A dictionary in the following format will be returned:
{
'TITLE' : 'EX_TITLE',
'AUTHOR' : 'EX_AUTHOR',
'REPORTNUMBER' : 'EX_RN',
}
@param dict_string: (string) - the string version of the dictionary.
@return: (dictionary) - the dictionary build from the string.
"""
## First, strip off the leading and trailing spaces and braces:
dict_string = dict_string.strip(" {}")
## Next, split the string on commas (,) that have not been escaped
## So, the following string: """'hello' : 'world', 'click' : 'here'""" will be split
## into the following list: ["'hello' : 'world'", " 'click' : 'here'"]
##
## However, The following string: """'hello\, world' : '!', 'click' : 'here'"""
## will be split into: ["'hello\, world' : '!'", " 'click' : 'here'"]
## I.e. the comma that was escaped in the string has been kept.
##
## So basically, split on unescaped parameters at first:
key_vals = re.split(r'(?<!\\),', dict_string)
## Now we should have a list of "key" : "value" terms. For each of them, check
## it is OK. If not in the format "Key" : "Value" (quotes are optional), discard it.
## As with the comma separator in the previous splitting, this one splits on any colon
## (:) that is not escaped by a backslash.
final_dictionary = {}
for key_value_string in key_vals:
## Split the pair apart, based on ":":
key_value_pair = re.split(r'(?<!\\):', key_value_string)
## check that the length of the new list is 2:
if len(key_value_pair) != 2:
## There was a problem with the splitting - pass this pair
continue
## The split was made.
## strip white-space, single-quotes and double-quotes from around the
## key and value pairs:
key_term = key_value_pair[0].strip(" '\"")
value_term = key_value_pair[1].strip(" '\"")
## Is the left-side (key) term empty?
if len(key_term) == 0:
continue
## Now, add the search-replace pair to the dictionary of search-replace terms:
final_dictionary[key_term] = value_term
return final_dictionary

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