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#!/usr/bin/python3
# -*- coding: utf-8 -*-
# Copyright (C) 2008 Agustin Henze -> agustinhenze at gmail.com
#
# This is free software.  You may redistribute it under the terms
# of the Apache license and the GNU General Public License Version
# 2 or at your option any later version.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
#
# Contributor(s):
#
# Søren Roug
#
# Oct 2014: Georges Khaznadar <georgesk@debian.org>
#   - ported to Python3
#   - imlemented the missing switch -c / --encoding, with an extra
#     feature for POSIX platforms which can guess encoding.

from odf.opendocument import OpenDocumentSpreadsheet
from odf.style import Style, TextProperties, ParagraphProperties, TableColumnProperties
from odf.text import P
from odf.table import Table, TableColumn, TableRow, TableCell
from optparse import OptionParser
import sys,csv,re, os, codecs

if sys.version_info[0]==3: unicode=str

if sys.version_info[0]==2:
    class UTF8Recoder:
        """
        Iterator that reads an encoded stream and reencodes the input to UTF-8
        """
        def __init__(self, f, encoding):
            self.reader = codecs.getreader(encoding)(f)

        def __iter__(self):
            return self

        def next(self):
            return self.reader.next().encode("utf-8")

    class UnicodeReader:
        """
        A CSV reader which will iterate over lines in the CSV file "f",
        which is encoded in the given encoding.
        """

        def __init__(self, f, dialect=csv.excel, encoding="utf-8", **kwds):
            f = UTF8Recoder(f, encoding)
            self.reader = csv.reader(f, dialect=dialect, **kwds)

        def next(self):
            row = self.reader.next()
            return [unicode(s, "utf-8") for s in row]

        def __iter__(self):
            return self


def csvToOds( pathFileCSV, pathFileODS, tableName='table',
              delimiter=',', quoting=csv.QUOTE_MINIMAL,
              quotechar = '"', escapechar = None,
              skipinitialspace = False, lineterminator = '\r\n',
              encoding="utf-8"):
    textdoc = OpenDocumentSpreadsheet()
    # Create a style for the table content. One we can modify
    # later in the word processor.
    tablecontents = Style(name="Table Contents", family="paragraph")
    tablecontents.addElement(ParagraphProperties(numberlines="false", linenumber="0"))
    tablecontents.addElement(TextProperties(fontweight="bold"))
    textdoc.styles.addElement(tablecontents)

    # Start the table
    table = Table( name=tableName )

    if sys.version_info[0]==3:
        reader = csv.reader(open(pathFileCSV, encoding=encoding),
                            delimiter=delimiter,
                            quoting=quoting,
                            quotechar=quotechar,
                            escapechar=escapechar,
                            skipinitialspace=skipinitialspace,
                            lineterminator=lineterminator)
    else:
        reader = UnicodeReader(open(pathFileCSV),
                               encoding=encoding,
                               delimiter=delimiter,
                               quoting=quoting,
                               quotechar=quotechar,
                               escapechar=escapechar,
                               skipinitialspace=skipinitialspace,
                               lineterminator=lineterminator)
    fltExp = re.compile('^\s*[-+]?\d+(\.\d+)?\s*$')

    for row in reader:
        tr = TableRow()
        table.addElement(tr)
        for val in row:
            if fltExp.match(val):
                tc = TableCell(valuetype="float", value=val.strip())
            else:
                tc = TableCell(valuetype="string")
            tr.addElement(tc)
            p = P(stylename=tablecontents,text=val)
            tc.addElement(p)

        textdoc.spreadsheet.addElement(table)
        textdoc.save( pathFileODS )

if __name__ == "__main__":
    usage = "%prog -i file.csv -o file.ods -d"
    parser = OptionParser(usage=usage, version="%prog 0.1")
    parser.add_option('-i','--input', action='store',
                      dest='input', help='File input in csv')
    parser.add_option('-o','--output', action='store',
                      dest='output', help='File output in ods')
    parser.add_option('-d','--delimiter', action='store',
                      dest='delimiter', help='specifies a one-character string to use as the field separator.  It defaults to ",".')

    parser.add_option('-c','--encoding', action='store',
                      dest='encoding', help='specifies the encoding the file csv. It defaults to utf-8')

    parser.add_option('-t','--table', action='store',
                      dest='tableName', help='The table name in the output file')

    parser.add_option('-s','--skipinitialspace',
                      dest='skipinitialspace', help='''specifies how to interpret whitespace which
                                                immediately follows a delimiter.  It defaults to False, which
                                                means that whitespace immediately following a delimiter is part
                                                of the following field.''')

    parser.add_option('-l','--lineterminator', action='store',
                      dest='lineterminator', help='''specifies the character sequence which should
                                                terminate rows.''')

    parser.add_option('-q','--quoting', action='store',
                      dest='quoting', help='''It can take on any of the following module constants:
                                                0 = QUOTE_MINIMAL means only when required, for example, when a field contains either the quotechar or the delimiter
                                                1 = QUOTE_ALL means that quotes are always placed around fields.
                                                2 = QUOTE_NONNUMERIC means that quotes are always placed around fields which do not parse as integers or floating point numbers.
                                                3 = QUOTE_NONE means that quotes are never placed around fields.
                                                It defaults is QUOTE_MINIMAL''')

    parser.add_option('-e','--escapechar', action='store',
                      dest='escapechar', help='''specifies a one-character string used to escape the delimiter when quoting is set to QUOTE_NONE.''')

    parser.add_option('-r','--quotechar', action='store',
                      dest='quotechar', help='''specifies a one-character string to use as the quoting character.  It defaults to ".''')

    (options, args) = parser.parse_args()

    if options.input:
        pathFileCSV = options.input
    else:
        parser.print_help()
        exit( 0 )

    if options.output:
        pathFileODS = options.output
    else:
        parser.print_help()
        exit( 0 )

    if options.delimiter:
        delimiter = options.delimiter
    else:
        delimiter = ","

    if options.skipinitialspace:
        skipinitialspace = True
    else:
        skipinitialspace=False

    if options.lineterminator:
        lineterminator = options.lineterminator
    else:
        lineterminator ="\r\n"

    if options.escapechar:
        escapechar = options.escapechar
    else:
        escapechar=None

    if options.tableName:
        tableName = options.tableName
    else:
        tableName = "table"

    if options.quotechar:
        quotechar = options.quotechar
    else:
        quotechar = "\""

    encoding = "utf-8" # default setting
    ###########################################################
    ## try to guess the encoding; this is implemented only with
    ## POSIX platforms. Can it be improved?
    output = os.popen('/usr/bin/file ' + pathFileCSV).read()
    m=re.match(r'^.*: ([-a-zA-Z0-9]+) text$', output)
    if m:
        encoding=m.group(1)
        if 'ISO-8859' in encoding:
            encoding="latin-1"
    else:
        encoding="utf-8"
    ############################################################
    # when the -c or --coding switch is used, it takes precedence
    if options.encoding:
        encoding = options.encoding

    csvToOds( pathFileCSV=unicode(pathFileCSV),
              pathFileODS=unicode(pathFileODS),
              delimiter=delimiter, skipinitialspace=skipinitialspace,
              escapechar=escapechar,
              lineterminator=unicode(lineterminator),
              tableName=tableName, quotechar=quotechar,
              encoding=encoding)

# Local Variables: ***
# mode: python     ***
# End:             ***