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# -*- coding: utf-8 -*-
from . import Blueprint, flash, db, \
current_user, login_required, \
assert_authorisation, templated, redirect, request, \
today
from ..model import Category, ConstExpense
from .. import forms as F
from sqlalchemy import sql
from functools import partial
mod = Blueprint('consts', __name__)
assert_authorisation = partial(assert_authorisation, ConstExpense.get)
def one_year(d):
"""Returns the date d', such that [d, d'] spans exactly one year.
In effect, this is d + 11 months (NB: not 12!)"""
if d.month == 1:
return d.replace(month = 12)
else:
return d.replace(month = d.month - 1, year = d.year + 1)
#
# Form
#
class ConstForm(F.Form):
start = F.DateField(u'Beginn', F.req,
format='%m.%Y',
default=lambda: today())
end = F.DateField(u'Ende', F.req,
format='%m.%Y',
default=lambda: one_year(today()),
description=u'(einschließlich)')
months = F.IntegerField(u'Zahlungsrythmus', F.req,
description='Monate')
expense = F.DecimalField(u'Betrag', F.req,
description=u'EUR',
places=2)
description = F.StringField(u'Beschreibung', F.req)
category = F.QuerySelectField(u'Kategorie',
get_label='name')
prev = F.QuerySelectField(u'Vorgänger',
get_label='description',
allow_blank=True)
def __init__(self, cur=None, obj=None):
obj = cur if obj is None else obj
super(ConstForm, self).__init__(obj=obj)
self.category.query = Category.of(current_user).order_by(Category.name)
# init prev_list
CE = ConstExpense
filter = (CE.next == None)
if cur and cur.id is not None: # not empty
filter = sql.or_(CE.next == cur, filter)
filter = sql.and_(filter, CE.id != cur.id)
self.prev.query = CE.of(current_user).filter(filter).order_by(CE.description)
#
# Views
#
@mod.route('/')
@login_required
@templated
def list ():
"""List all constant expenses."""
d = today()
expenses = ConstExpense.of(current_user).order_by(ConstExpense.description).all()
current = []
old = []
future = []
for e in expenses:
if e.start <= d:
if e.end >= d:
current.append(e)
else:
old.append(e)
else:
future.append(e)
return { 'current': current, 'old': old, 'future': future }
@mod.route('/<int:id>')
@login_required
@assert_authorisation('id')
@templated
def show(id):
"""Show a specific constant expense."""
return { 'exp': ConstExpense.get(id) }
@mod.route('/edit/<int:id>', methods=('GET', 'POST'))
@login_required
@assert_authorisation('id')
@templated
def edit(id):
"""Edit a specific constant expense. This includes deletion."""
exp = ConstExpense.get(id)
form = ConstForm(exp)
if form.is_submitted():
if 'deleteB' in request.form:
db.session.delete(exp)
db.session.commit()
return redirect('.list')
elif form.flash_validate(): # change
form.populate_obj(exp)
db.session.commit()
flash(u"Eintrag geändert.")
return redirect('.show', id = id)
return { 'form': form }
@mod.route('/add/', methods=('GET', 'POST'))
@login_required
@templated
def add():
"""Add a new constant expense."""
exp = ConstExpense()
form = ConstForm()
if form.validate_on_submit():
form.populate_obj(exp)
exp.user = current_user
db.session.add(exp)
db.session.commit()
flash(u"Eintrag hinzugefügt.")
return redirect('.show', id = exp.id)
return { 'form': form }
@mod.route('/add/from/<int:other>')
@login_required
@assert_authorisation('other')
@templated('.add')
def add_from(other):
"""Copy `other` and create a new expense based on it."""
exp = ConstExpense() # needed to initialize 'CE.next'
other = ConstExpense.get(other)
# get form with data from other
form = ConstForm(obj = other)
# replace some fields to be more meaningful
start = max(form.end.data, today())
form.start.data = start
form.end.data = one_year(start)
if not other.next: form.prev.data = other
return { 'form': form }
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