change_tense

#! /usr/bin/env python3

import argparse

parser = argparse.ArgumentParser(description='Attempts to change the verb tense of English text.')
parser.add_argument('--past', dest='tense', action='store_const',
                    const='past', default='past',
                    help='Convert to past tense (default)')
parser.add_argument('--present', dest='tense', action='store_const',
                    const='present',
                    help='Convert to present tense')
parser.add_argument('--straight', dest='straight', action='store_true', default=False,
                    help="Input contains 'straight' apostrophes, not ‘curly’ ones")
parser.add_argument('--text', dest='text', action='store',
                    help="The text to convert.")
parser.add_argument('files', metavar="FILENAMES", type=str, nargs='*',
					help='Text file(s) to read; if none are given, reads stdin.')
args = parser.parse_args()



import fileinput
import tenseflow


def process(line):
    if not args.straight:
        line = line.replace(u"’", u"'")     # Unicode apostrophes in contractions confuse tenseflow
    out = tenseflow.change_tense(line, args.tense)
    if not args.straight:
        out = out.replace(u"'", u"’").replace(u" ’", u"’")
    print(out, end="")


if args.text != None:
    process(args.text)
    print("")
    if len(args.files) == 0:
        exit(0)

for line in fileinput.FileInput(args.files):
    process(line)