import constants
import os

def remove_tricky_unicode(x):
    try:
        x = x.decode('utf-8')
        x = x.replace(u"\u2018", "'").replace(u"\u2019", "'")
        x = x.replace(u"\u201c", '"').replace(u"\u201d", '"')
        x = x.replace(u"\u2e3a", "-").replace(u"\u2014", "-")
    except:
        pass
    return x

class file_writer:
    def __init__(self, filename):
        self.full_filename = os.path.join(constants.pages_dir,
                                          filename)
        self.f = open(self.full_filename, 'w')
        self.xforms = [ remove_tricky_unicode ]

    def add_xform(self, xform):
        self.xforms.append(xform)

    def write(self, data):
        for xform in self.xforms:
            data = xform(data)
        self.f.write(data.encode('utf-8'))

    def done(self):
        self.f.close()

    def close(self):
        self.done()

# Test
#def toupper(x):
#    return x.upper()
#
#fw = file_writer("test")
#fw.add_xform(toupper)
#fw.write(u"This is a \u201ctest\u201d. \n")
#fw.done()