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path: root/fracture/__main__.py
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from invoice import Invoice, Tax, Product, Conf
import db

from csv import DictWriter
import datetime
from functools import wraps
from argparse import ArgumentParser as ap
import tempfile
import subprocess
import sqlite3
from configparser import ConfigParser
import os
from os import path

CONFIG_FILE = ""


def load_config():
    basedir = os.environ.get("XDG_CONFIG_HOME", None) or \
              path.join(os.environ["HOME"], ".config")

    basedir = path.join(basedir, "fracture")
    confile = path.join(basedir, "config")

    global CONFIG_FILE
    CONFIG_FILE = confile

    conf = ConfigParser()
    conf.read(confile)

    # VAT-types
    for k in conf["vat"]:
        Product.VATS += (float(conf["vat"][k]),)

    # SERIES
    for k in conf["series"]:
        Invoice.SERIES[int(k)] = conf["series"][k]

    if Invoice.SERIES == {}:
        raise "Invoice series not configured correctly: no series found"

    # ID FORMAT
    FORMAT = conf["invoice"].get("id_format",
             '"%s/%s/%s" % (series, date.year, id)')

    def f(series, date, id):
        return eval(FORMAT, None, {"series": series, "date": date, "id": id})

    Invoice.ID_FORMAT =  f

    # CURRENCY
    Conf.CURRENCY  = conf["invoice"].get("currency", "€")
    Conf.CURRENCY_DECIMAL = conf["invoice"].getint("currency_decimal", 2)

    # TEMPLATE ?
    # TODO
    # Or dump a json or something?
    templatefile = conf["invoice"]["template"]
    if not path.isabs(templatefile):
        templatefile = path.join(confile, templatefile)

    # INVOICE LEVEL TAXES (like IRPF in Spain)
    tax = ()
    for k in conf["taxes"]:
        tax += (Tax(k, conf.getfloat("taxes",k)),)
    Invoice.DEFAULT_TAXES = tax

    # DATABASE
    Invoice.DB_FILE = path.join(basedir, "invoice.db")
    if not path.exists(Invoice.DB_FILE):
        db.create(Invoice.DB_FILE)

def call_editor(filename):
    """ Edit filename with $EDITOR (fallback to Vim) """
    if not os.path.exists(filename):
        raise FileNotFoundError("File not found: " + filename)
    process = subprocess.Popen([os.environ.get("EDITOR", "vim"), filename],)
    process.wait()

def edit(contents):
    """ Edit temporary file with initial `contents` and return it"s edited
    content """

    with tempfile.NamedTemporaryFile(mode="w", delete=False) as t:
        t.write(contents)

    call_editor(t.name)

    with open(t.name) as t:
        edited_content = t.read()

    if os.path.exists(t.name):
        os.remove(t.name)

    return edited_content

def command(f):
    @wraps(f)
    def remove_func_arg(namespace):
        kwargs = vars(namespace)
        del kwargs["func"]
        f(**kwargs)
    return remove_func_arg

@command
def edit_config():
    # TODO: Generate config file if not created
    call_editor(CONFIG_FILE)

@command
def new_invoice():
    num = Invoice.from_config( edit( Invoice().to_config() )).persist()
    #
    print(num)
    # edit(Invoice.load(num).to_config())

@command
def summarize(xlsx=False, year=None, quarter=None):
    invoices = Invoice.load_by_date(year, quarter)
    rows     = sorted((map(lambda x: x.to_row(), invoices)),
                 key=lambda x: x["type"])

    keys = list(rows[0].keys())
    for r in rows:
        for k in r.keys():
            if k not in keys:
                # TODO:
                # Inserts all the taxes at the end, but this is not cool
                # because it needs information about how is the invoice
                # arranged
                # Maybe move this to a static function in invoices and call it
                # summary and make it work with some logic like: create the
                # keys first and then go setting them in order
                keys.insert(-1, k)
    import sys
    wrtr = DictWriter(sys.stdout, keys)
    wrtr.writeheader()
    for r in rows:
        wrtr.writerow(r)

@command
def render(id, type=None):
    invoice = Invoice.load_by_idrepr(id, type)
    if invoice is not None:
        print(invoice.to_json())

if __name__ == "__main__":
    load_config()

    parser = ap(prog="fracture")
    parser.set_defaults(func=lambda: parser.print_help())
    subparsers = parser.add_subparsers(title= "Subcommands",
                help="sub-command help")

    # New Invoice
    new_parser = subparsers.add_parser("new", aliases=["n"], help="a help")
    new_parser.set_defaults(func=new_invoice)

    # Configure fracture
    configure_parser = subparsers.add_parser("configure",
        aliases=["c","conf","config"],
        help="b help")
    configure_parser.set_defaults(func=edit_config)

    # Summary
    summary_parser = subparsers.add_parser("summary", aliases=["s", "sum"],
        help="Display summary for tax declarations")
    summary_parser.add_argument("--xlsx", action="store_true",
        help="Output as xlsx")
    summary_parser.add_argument("--quarter", type=int,
        help="Obtain the summary of the quarter")
    summary_parser.add_argument("--year", type=int,
        default=datetime.datetime.now().year,
        help="Obtain the summary of the year")
    summary_parser.set_defaults(func=summarize)

    # Dump invoice
    summary_parser = subparsers.add_parser("render", aliases=["rend", "r"],
        help="Render chosen invoice in json format")
    summary_parser.add_argument("id", nargs="?", type=str,
        help="Invoice identification string")
    summary_parser.add_argument("--type", type=str,
        help="Invoice type", default="sent")

    summary_parser.set_defaults(func=render)

    # parse
    args = parser.parse_args()
    args.func(args)