CSV > DOM converter

# -*- coding: iso-8859-1 -*-
"""
MoinMoin - Comma-separated values input converter

Convert from Comma-separated values into DOM table format.

@copyright: 2010 MoinMoin:DmitryAndreev
@license: GNU GPL, see COPYING for details.
"""
from __future__ import absolute_import

delimiter = ';'
quotechar = '"'

from MoinMoin.util.tree import moin_page

from csv import reader as csvparser

def unicode_csvparser(unicode_csv_data, **kwargs):
    """
    This is csv.reader with unicode support
    """
    # csv.py doesn't do Unicode; encode temporarily as UTF-8:
    csv_reader = csvparser(utf_8_encoder(unicode_csv_data), **kwargs)
    for row in csv_reader:
    # decode UTF-8 back to Unicode, cell by cell:
        yield [unicode(cell, 'utf-8') for cell in row]

def utf_8_encoder(unicode_csv_data):
    """
    Convert text in utf-8
    """
    for line in unicode_csv_data:
        yield line.encode('utf-8')

class Converter(object):
    """
    Parse csv and create table in DOM format.
    """
    @classmethod
    def factory(cls, _request, input, output, **kw):
        if output.type == 'application' and output.subtype == 'x.moin.document':
            if input.type == 'text' and input.subtype == 'csv':
                return cls
            if (input.type == 'text' and input.subtype == 'format' and
                    input.parameters.get('name') == 'csv'):
                return cls

    def __init__(self,_request, delimiter = delimiter, quotechar = delimiter):
        self.delimiter = delimiter
        self.quotechar = quotechar
        pass

    def __call__(self, content, arguments={}):
        """
        Parse the csv text and return DOM tree.

        @param content: csv text, list of lines.
        """
        delimiter = arguments.get('delimiter', defaule=delimiter)
        splited_rows = unicode_csvparser(content, delimiter=self.delimiter, quotechar=self.quotechar)
        rows = []
        for row in splited_rows:
            cells = []
            for cell in row:
                cells.append(moin_page.table_cell(children=(cell, )))
            rows.append(moin_page.table_row(children=cells))

        table_body = moin_page.table_body(children=rows)
        table = moin_page.table(children=(table_body, ))
        page_body = moin_page.body(children=(table, ))

        return moin_page.page(children=(page_body, ))

from . import default_registry
default_registry.register(Converter.factory)