first shot

README.md

@@ -5,15 +5,20 @@
 
 ## general configuration
 
-Look at *app/config/email.py.example** for the configuration of the 
+Look at *app/config/email.py.example* for the configuration of the
 parameters required for sending emails. Copy the file as *email.py* to
 a folder that will serve as configuration directory and fill in the 
 information. The directory will be used as volume during container 
 operation.
 
 ## start database
+
 `docker run --name pitstops_db -e MYSQL_ROOT_PASSWORD=$SOMESECUREPASSWORD$ -e MYSQL_DATABASE=pitstops -d mysql:latest`
 
+or
+
+`docker run --name pitstops_db -e MYSQL_ROOT_PASSWORD=$SOMESECUREPASSWORD$ -e MYSQL_DATABASE=pitstops -d mariadb:latest`
+
 ## Database migrations
 ### From *Cathrine* to *Master*:
 
@@ -26,6 +31,6 @@ reloaded automatically. The sqlite file will be stored in *tmp* so it
 can be inspected with tools like *sqlite3*. The switch *DEBUG* enables
 debugging during development.
 
-`docker run --rm --name rollerverbrauch -ti -v $PWD/app:/app --link pitstops_db:database -p 5000:5000 -e SECURITY_PASSWORD_SALT=XXX -e SECRET_KEY=XXX -e MAIL_SERVER=XXX -e MAIL_USERNAME=XXX -e MAIL_PASSWORD=XXX rollerverbrauch`
+`docker run --rm --name rollerverbrauch -ti -v $PWD/app:/app -v $PWD/data:/data -p 5000:5000 -e SECURITY_PASSWORD_SALT=XXX -e SECRET_KEY=XXX -e MAIL_SERVER=XXX -e MAIL_USERNAME=XXX -e MAIL_PASSWORD=XXX rollerverbrauch`
 ## run in production
 `docker run --name pitstops -tid -e PROXY_DATA=server_names:ps.lusiardi.de,port:5000 --link pitstops_db:database -e SECURITY_PASSWORD_SALT=XXX -e SECRET_KEY=XXX -e MAIL_SERVER=XXX -e MAIL_USERNAME=XXX -e MAIL_PASSWORD=XXX rollerverbrauch:catherine`

app/entities.py

@@ -1,24 +1,33 @@
 from app import db
 from flask_security import UserMixin, RoleMixin
 
-roles_users = db.Table('roles_users',
+roles_users = db.Table(
-                       db.Column('user_id', db.Integer(), db.ForeignKey('user.id')),
+    "roles_users",
-                       db.Column('role_id', db.Integer(), db.ForeignKey('role.id')))
+    db.Column("user_id", db.Integer(), db.ForeignKey("user.id")),
+    db.Column("role_id", db.Integer(), db.ForeignKey("role.id")),
+)
 
-vehicles_consumables = db.Table('vehicles_consumables',
+vehicles_consumables = db.Table(
-                                db.Column('vehicle_id', db.Integer(), db.ForeignKey('vehicle.id')),
+    "vehicles_consumables",
-                                db.Column('consumable_id', db.Integer(), db.ForeignKey('consumable.id')))
+    db.Column("vehicle_id", db.Integer(), db.ForeignKey("vehicle.id")),
+    db.Column("consumable_id", db.Integer(), db.ForeignKey("consumable.id")),
+)
 
 
-users_fillingstations = db.Table('users_fillingstations',
+users_fillingstations = db.Table(
-                                db.Column('user_id', db.Integer(), db.ForeignKey('user.id')),
+    "users_fillingstations",
-                                db.Column('fillingstation_id', db.Integer(), db.ForeignKey('filling_station.int_id')))
+    db.Column("user_id", db.Integer(), db.ForeignKey("user.id")),
+    db.Column(
+        "fillingstation_id", db.Integer(), db.ForeignKey("filling_station.int_id")
+    ),
+)
 
 
 class Role(db.Model, RoleMixin):
     """
     Entity to handle different roles for users: Typically user and admin exist
     """
+
     id = db.Column(db.Integer(), primary_key=True)
     name = db.Column(db.String(80), unique=True)
     description = db.Column(db.String(255))
@@ -34,6 +43,7 @@ class User(db.Model, UserMixin):
     """
     Entity to represent a user including login data and links to roles and vehicles.
     """
+
     id = db.Column(db.Integer, primary_key=True)
     email = db.Column(db.String(255), unique=True)
     password = db.Column(db.String(255))
@@ -43,17 +53,12 @@ class User(db.Model, UserMixin):
     home_long = db.Column(db.Numeric(8, 5), default=0)
     home_zoom = db.Column(db.Integer(), default=0)
 
-    vehicles = db.relationship(
+    vehicles = db.relationship("Vehicle")
-        'Vehicle'
-    )
     roles = db.relationship(
-        'Role',
+        "Role", secondary=roles_users, backref=db.backref("users", lazy="dynamic")
-        secondary=roles_users,
-        backref=db.backref('users', lazy='dynamic')
     )
     favourite_filling_stations = db.relationship(
-        'FillingStation',
+        "FillingStation", secondary=users_fillingstations
-        secondary=users_fillingstations
     )
 
     def __repr__(self):
@@ -69,31 +74,26 @@ class Vehicle(db.Model):
      * list of pitstops
      * list of possible consumables
     """
+
     id = db.Column(db.Integer, primary_key=True)
-    owner_id = db.Column(db.Integer, db.ForeignKey('user.id'))
+    owner_id = db.Column(db.Integer, db.ForeignKey("user.id"))
     name = db.Column(db.String(255))
-    pitstops = db.relationship(
+    pitstops = db.relationship("Pitstop", order_by="asc(Pitstop.odometer)")
-        'Pitstop',
+    services = db.relationship("Service", order_by="asc(Service.odometer)")
-        order_by="asc(Pitstop.odometer)"
+    regulars = db.relationship("RegularCost")
-    )
+    consumables = db.relationship("Consumable", secondary=vehicles_consumables)
-    services = db.relationship(
-        'Service',
-        order_by = "asc(Service.odometer)"
-    )
-    consumables = db.relationship(
-        'Consumable',
-        secondary=vehicles_consumables
-    )
     # allow vehicle names to be duplicated between different owners but must still be uniq for each owner
-    __table_args__ = (db.UniqueConstraint('owner_id',
+    __table_args__ = (db.UniqueConstraint("owner_id", "name", name="_owner_name_uniq"),)
-                                          'name',
-                                          name='_owner_name_uniq'),)
 
     def __init__(self, name):
         self.name = name
 
     def __repr__(self):
-        return '<Vehicle id="%r" owner_id="%r" name="%r" />' % (self.id, self.owner_id, self.name)
+        return '<Vehicle id="%r" owner_id="%r" name="%r" />' % (
+            self.id,
+            self.owner_id,
+            self.name,
+        )
 
 
 class Pitstop(db.Model):
@@ -107,21 +107,26 @@ class Pitstop(db.Model):
      * the costs of the consumable
      * the id of the vehicle that was refuelled
     """
+
     id = db.Column(db.Integer, primary_key=True)
     date = db.Column(db.Date)
     odometer = db.Column(db.Integer)
-    consumable_id = db.Column(db.Integer, db.ForeignKey('consumable.id'))
+    consumable_id = db.Column(db.Integer, db.ForeignKey("consumable.id"))
     amount = db.Column(db.Numeric(5, 2))
     costs = db.Column(db.Numeric(5, 2), default=0)
-    vehicle_id = db.Column(db.Integer, db.ForeignKey('vehicle.id'))
+    vehicle_id = db.Column(db.Integer, db.ForeignKey("vehicle.id"))
     # short cut to access the fuelled consumable of the pitstop
-    consumable = db.relationship('Consumable')
+    consumable = db.relationship("Consumable")
-    # this uniqueness constraint makes sure that for each consumable and each vehicle only one pitstop exists at the
+    # this uniqueness constraint makes sure that for each consumable and each
-    # same odometer
+    # vehicle only one pitstop exists at the same odometer
-    __table_args__ = (db.UniqueConstraint('odometer',
+    __table_args__ = (
-                                          'consumable_id',
+        db.UniqueConstraint(
-                                          'vehicle_id',
+            "odometer",
-                                          name='_odometer_consumable_vehicle_uniq'),)
+            "consumable_id",
+            "vehicle_id",
+            name="_odometer_consumable_vehicle_uniq",
+        ),
+    )
 
     def __init__(self, odometer, amount, date, costs, consumable_id):
         self.odometer = odometer
@@ -131,8 +136,31 @@ class Pitstop(db.Model):
         self.consumable_id = consumable_id
 
     def __repr__(self):
-        return '<Pitstop odometer="%r" amount="%r" date="%r" vehicle_id="%r" consumable_id="%r">' % \
+        return '<Pitstop odometer="%r" amount="%r" date="%r" vehicle_id="%r" consumable_id="%r">' % (
-               (self.odometer, self.amount, self.date, self.vehicle_id, self.consumable_id)
+            self.odometer,
+            self.amount,
+            self.date,
+            self.vehicle_id,
+            self.consumable_id,
+        )
+
+
+class RegularCost(db.Model):
+    id = db.Column(db.Integer, primary_key=True)
+    vehicle_id = db.Column(db.Integer, db.ForeignKey("vehicle.id"))
+    description = db.Column(db.String(4096), unique=True)
+    costs = db.Column(db.Numeric(10, 2), default=0)
+    days = db.Column(db.String(1024))
+    start_at = db.Column(db.Date)
+    ends_at = db.Column(db.Date)
+
+    def __init__(self, vehicle_id, description, costs, days, start_at, ends_at):
+        self.vehicle_id = vehicle_id
+        self.description = description
+        self.costs = costs
+        self.days = days
+        self.start_at = start_at
+        self.ends_at = ends_at
 
 
 class Consumable(db.Model):
@@ -142,15 +170,13 @@ class Consumable(db.Model):
      * name (must be globally unique)
      * unit
     """
+
     id = db.Column(db.Integer, primary_key=True)
     name = db.Column(db.String(255), unique=True)
     ext_id = db.Column(db.String(255))
     unit = db.Column(db.String(255))
 
-    vehicles = db.relationship(
+    vehicles = db.relationship("Vehicle", secondary=vehicles_consumables)
-        'Vehicle',
-        secondary=vehicles_consumables
-    )
 
     def __init__(self, name, ext_id, unit):
         self.name = name
@@ -165,7 +191,7 @@ class Service(db.Model):
     id = db.Column(db.Integer, primary_key=True)
     date = db.Column(db.Date)
     odometer = db.Column(db.Integer)
-    vehicle_id = db.Column(db.Integer, db.ForeignKey('vehicle.id'))
+    vehicle_id = db.Column(db.Integer, db.ForeignKey("vehicle.id"))
     costs = db.Column(db.Numeric(10, 2), default=0)
     description = db.Column(db.String(4096))
 
@@ -177,8 +203,10 @@ class Service(db.Model):
         self.vehicle_id = vehicle_id
 
     def __repr__(self):
-        return '<Service odometer="%r" date="%r" vehicle_id="%r" costs="%r" description="%r">' % \
+        return (
-               (self.odometer, self.date, self.vehicle_id, self.costs, self.description)
+            '<Service odometer="%r" date="%r" vehicle_id="%r" costs="%r" description="%r">'
+            % (self.odometer, self.date, self.vehicle_id, self.costs, self.description)
+        )
 
 
 class FillingStation(db.Model):
@@ -203,6 +231,7 @@ class FillingStation(db.Model):
         for c in self.__table__.columns:
             val = getattr(self, c.name)
             import decimal
+
             if isinstance(val, decimal.Decimal):
                 val = float(val)
             val = str(val)

app/forms/__init__.py

@@ -4,3 +4,4 @@ from .checks import *
 from .consumable import *
 from .service import *
 from .vehicle import *
+from .regular_cost import *

app/forms/checks.py

@@ -2,10 +2,34 @@ from wtforms.validators import ValidationError
 from datetime import date
 
 
+def regular_costs_days_check(form, field):
+    """
+    Checks the input field to enter multiple days in the following format:
+      `01-15,07-15` for Jan 15th and July 15
+    """
+    days = form.days.data
+    for day in days.split(","):
+        day = day.strip()
+        if not day:
+            raise ValidationError("Missing Date after ','")
+        try:
+            m, d = day.split("-")
+            m_i = int(m)
+            d_i = int(d)
+        except Exception:
+            raise ValidationError("Malformed Date, must be 'Month-Day'")
+        try:
+            d = date(2021, m_i, d_i)
+        except Exception:
+            raise ValidationError("{}-{} is not a valid date".format(m, d))
+
+
 def odometer_date_check(form, field):
     """
-    Checks that the entered date and odometer of the pit stop is conformant to the existing pit stops. That means, if a
+    Checks that the entered date and odometer of the pit stop is conformant to
-    pitstops date is between two other pit stops, the odometer should be as well.
+    the existing pit stops. That means, if a pitstops date is between two
+    other pit stops, the odometer should be as well.
+
     :param form:
     :param field:
     :return:
@@ -16,23 +40,37 @@ def odometer_date_check(form, field):
 
     if len(pitstops) > 0:
         if date < pitstops[0].date and odometer >= pitstops[0].odometer:
-            raise ValidationError('The new odometer value must be less than %i km' % pitstops[0].odometer)
+            raise ValidationError(
+                "The new odometer value must be less than %i km"
+                % pitstops[0].odometer
+            )
 
         if date >= pitstops[-1].date and odometer <= pitstops[-1].odometer:
-            raise ValidationError('The new odometer value must be greater than %i km' % pitstops[-1].odometer)
+            raise ValidationError(
+                "The new odometer value must be greater than %i km"
+                % pitstops[-1].odometer
+            )
 
     if len(pitstops) > 1:
-        for index in range(0, len(pitstops)-1):
+        for index in range(0, len(pitstops) - 1):
             if pitstops[index].date <= date < pitstops[index + 1].date:
-                if odometer <= pitstops[index].odometer or odometer >= pitstops[index+1].odometer:
+                if (
-                    raise ValidationError('The new odometer value must be greater than %i km and less than %i km'
+                    odometer <= pitstops[index].odometer
-                                          % (pitstops[index].odometer,pitstops[index+1].odometer))
+                    or odometer >= pitstops[index + 1].odometer
+                ):
+                    raise ValidationError(
+                        "The new odometer value must be greater than %i km and less than %i km"
+                        % (
+                            pitstops[index].odometer,
+                            pitstops[index + 1].odometer,
+                        )
+                    )
 
 
 def edit_odometer_date_check(form, field):
     """
-    This makes exactly the same checks as 'odometer_date_check' but the odometers may be the same (to change only amount
+    This makes exactly the same checks as 'odometer_date_check' but the
-    and price).
+    odometers may be the same (to change only amount and price).
 
     :param form:
     :param field:
@@ -44,31 +82,50 @@ def edit_odometer_date_check(form, field):
 
     if len(pitstops) > 0:
         if date < pitstops[0].date and odometer > pitstops[0].odometer:
-            raise ValidationError('The new odometer value must be less than %i km' % pitstops[0].odometer)
+            raise ValidationError(
+                "The new odometer value must be less than %i km"
+                % pitstops[0].odometer
+            )
 
         if date >= pitstops[-1].date and odometer < pitstops[-1].odometer:
-            raise ValidationError('The new odometer value must be greater than %i km' % pitstops[-1].odometer)
+            raise ValidationError(
+                "The new odometer value must be greater than %i km"
+                % pitstops[-1].odometer
+            )
 
     if len(pitstops) > 1:
-        for index in range(0, len(pitstops)-1):
+        for index in range(0, len(pitstops) - 1):
             if pitstops[index].date <= date < pitstops[index + 1].date:
-                if odometer < pitstops[index].odometer or odometer > pitstops[index+1].odometer:
+                if (
-                    raise ValidationError('The new odometer value must be greater than %i km and less than %i km'
+                    odometer < pitstops[index].odometer
-                                          % (pitstops[index].odometer,pitstops[index+1].odometer))
+                    or odometer > pitstops[index + 1].odometer
+                ):
+                    raise ValidationError(
+                        "The new odometer value must be greater than %i km and less than %i km"
+                        % (
+                            pitstops[index].odometer,
+                            pitstops[index + 1].odometer,
+                        )
+                    )
 
 
 def date_check(form, field):
     """
-    Checks that the date of the pitstop is not before the date of the latest pitstop and not after today.
+    Checks that the date of the pitstop is not before the date of the latest
+    pitstop and not after today.
 
     :param form: the form where the field is in
     :param field: the field to check
     :return: Nothing or a ValidationError if the limits are not kept
     """
     if field.data < form.last_pitstop.date:
-        raise ValidationError('The new date must not be before %s' % form.last_pitstop.date)
+        raise ValidationError(
+            "The new date must not be before %s" % form.last_pitstop.date
+        )
     if field.data > date.today():
-        raise ValidationError('The new date must not be after %s' % date.today())
+        raise ValidationError(
+            "The new date must not be after %s" % date.today()
+        )
 
 
 def odometer_check(form, field):
@@ -78,20 +135,29 @@ def odometer_check(form, field):
     :param field:
     :return:
     """
-    if not form.same_odometer_allowed and field.data <= form.last_pitstop.odometer:
+    if (
-        raise ValidationError('The new odometer value must be higher than %i km' % form.last_pitstop.odometer)
+        not form.same_odometer_allowed
+        and field.data <= form.last_pitstop.odometer
+    ):
+        raise ValidationError(
+            "The new odometer value must be higher than %i km"
+            % form.last_pitstop.odometer
+        )
     if form.same_odometer_allowed and field.data < form.last_pitstop.odometer:
-        raise ValidationError('The new odometer value must be higher than %i km' % form.last_pitstop.odometer)
+        raise ValidationError(
+            "The new odometer value must be higher than %i km"
+            % form.last_pitstop.odometer
+        )
 
 
 def litres_check(form, field):
     if field.data is not None and field.data <= 0:
-        raise ValidationError('You must fuel at least 0.1 l')
+        raise ValidationError("You must fuel at least 0.1 l")
 
 
 def costs_check(form, field):
     if field.data is not None and field.data <= 0:
-        raise ValidationError('Costs must be above 0.01 €.')
+        raise ValidationError("Costs must be above 0.01 €.")
 
 
 def edit_costs_check(form, field):
@@ -101,8 +167,8 @@ def edit_costs_check(form, field):
     :param field:
     :return:
     """
-    costs_check_required = (form.costs.default is not None and form.costs.default > 0)
+    costs_check_required = (
+        form.costs.default is not None and form.costs.default > 0
+    )
     if costs_check_required and field.data is not None and field.data <= 0:
-        raise ValidationError('Costs must be above 0.01 €.')
+        raise ValidationError("Costs must be above 0.01 €.")
-
-

app/forms/regular_cost.py

@@ -0,0 +1,86 @@
+from flask_wtf import FlaskForm
+from wtforms import (
+    DateField,
+    IntegerField,
+    DecimalField,
+    SubmitField,
+    TextAreaField,
+    StringField,
+)
+from wtforms.validators import Length
+
+from .checks import *
+
+from wtforms.validators import Optional
+
+
+class DeleteRegularCostForm(FlaskForm):
+    submit = SubmitField(label="Really delete this regular cost!")
+
+
+class EndRegularCostForm(FlaskForm):
+    submit = SubmitField(label="Really end this regular cost!")
+
+
+class EditRegularCostForm(FlaskForm):
+    start_at = DateField("Date of first instance")
+    ends_at = DateField(
+        "Date of last instance", validators=[Optional(strip_whitespace=True)]
+    )
+
+    days = StringField("Days for instance", validators=[regular_costs_days_check])
+
+    costs = DecimalField("Costs (€, per instance)", places=2, validators=[costs_check])
+    description = TextAreaField("Description", validators=[Length(1, 4096)])
+    submit = SubmitField(label="Update it!")
+
+    def preinit_with_data(self):
+        if self.costs.data:
+            self.costs.default = self.costs.data
+        if self.start_at.data:
+            self.start_at.default = self.start_at.data
+        if self.ends_at.data:
+            self.ends_at.default = self.ends_at.data
+        if self.days.data:
+            self.days.default = self.days.data
+        if self.description.data:
+            self.description.default = self.description.data
+
+    def get_hint_messages(self):
+        messages = {"costs": "Costs must be higher than 0.01 €."}
+        return messages
+
+
+class CreateRegularCostForm(FlaskForm):
+    start_at = DateField("Date of first instance")
+    ends_at = DateField(
+        "Date of last instance", validators=[Optional(strip_whitespace=True)]
+    )
+
+    days = StringField("Days for instance", validators=[regular_costs_days_check])
+
+    costs = DecimalField("Costs (€, per instance)", places=2, validators=[costs_check])
+    description = TextAreaField("Description", validators=[Length(1, 4096)])
+    submit = SubmitField(label="Do it!")
+
+    def preinit_with_data(self):
+        if self.start_at.data:
+            self.start_at.default = self.start_at.data
+        else:
+            self.start_at.default = date.today()
+
+        if self.ends_at.data:
+            self.ends_at.default = self.ends_at.data
+        else:
+            self.ends_at.default = None
+
+        if self.days.data:
+            self.days.default = self.days.data
+
+        if self.costs.data:
+            self.costs.default = self.costs.data
+        else:
+            self.costs.default = 0
+
+        if self.description.data:
+            self.description.default = self.description.data

app/routes/__init__.py

@@ -4,3 +4,4 @@ from .misc import *
 from .pitstop import *
 from .service import *
 from .filling_stations import *
+from .regular_cost import *

app/routes/pitstop.py

@@ -3,11 +3,16 @@ from flask_security import login_required
 from flask_security.core import current_user
 from sqlalchemy.exc import IntegrityError
 from datetime import date
+import types
+
 
 from ..entities import Vehicle, Consumable, Pitstop
-from ..forms import SelectVehicleForm, SelectConsumableForm, CreatePitstopForm, EditPitstopForm, DeletePitStopForm
+from ..forms import SelectVehicleForm, SelectConsumableForm, \
-from ..tools import db_log_update, db_log_delete, db_log_add, pitstop_service_key, \
+    CreatePitstopForm, EditPitstopForm, DeletePitStopForm
-    get_event_line_for_vehicle, update_filling_station_prices
+from ..tools import db_log_update, db_log_delete, db_log_add, \
+    pitstop_service_key, get_event_line_for_vehicle, \
+    update_filling_station_prices, RegularCostInstance, \
+    calculate_regular_cost_instances
 from .. import app, db
 
 
@@ -162,11 +167,15 @@ def get_pit_stops():
             data.append(pitstop)
         for service in vehicle.services:
             data.append(service)
+        for regular_instance in calculate_regular_cost_instances(vehicle):
+            data.append(regular_instance)
+
         data.sort(key=pitstop_service_key)
         v = {
             'id': vehicle.id,
             'name': vehicle.name,
-            'data': data
+            'data': data,
+            "regulars": vehicle.regulars,
         }
         user['vehicles'].append(v)
 

app/routes/regular_cost.py

@@ -0,0 +1,161 @@
+from flask import url_for, redirect, render_template, flash
+from flask_security import login_required
+from flask_security.core import current_user
+from sqlalchemy.exc import IntegrityError
+from datetime import date
+
+from ..entities import Vehicle, Consumable, Pitstop, RegularCost
+from ..forms import (
+    SelectVehicleForm,
+    CreateRegularCostForm,
+    DeleteRegularCostForm,
+    EditRegularCostForm,
+    EndRegularCostForm,
+)
+from ..tools import (
+    db_log_update,
+    db_log_delete,
+    db_log_add,
+    pitstop_service_key,
+    get_event_line_for_vehicle,
+    update_filling_station_prices,
+)
+from .. import app, db
+
+
+@app.route("/regular_costs/delete/<int:pid>", methods=["GET", "POST"])
+@login_required
+def delete_regular_form(pid):
+    regular_cost = RegularCost.query.filter(RegularCost.id == pid).first()
+    if regular_cost is None:
+        return redirect(url_for("get_pit_stops"))
+    vehicle = Vehicle.query.filter(Vehicle.id == regular_cost.vehicle_id).first()
+    if vehicle not in current_user.vehicles:
+        return redirect(url_for("get_pit_stops"))
+
+    form = DeleteRegularCostForm()
+    if form.validate_on_submit():
+        db.session.delete(regular_cost)
+        db.session.commit()
+        db_log_delete(regular_cost)
+        return redirect(url_for("get_pit_stops", _anchor="v" + str(vehicle.id)))
+
+    return render_template(
+        "deleteRegularCostForm.html", form=form, regular_cost=regular_cost
+    )
+
+
+@app.route("/regular_costs/vehicle/select", methods=["GET", "POST"])
+@login_required
+def select_vehicle_for_new_regular_cost():
+    if len(current_user.vehicles) == 1:
+        return redirect(
+            url_for("create_regular_cost_for_vehicle", vid=current_user.vehicles[0].id)
+        )
+
+    form = SelectVehicleForm()
+    form.vehicle.choices = [(g.id, g.name) for g in current_user.vehicles]
+
+    if form.validate_on_submit():
+        return redirect(
+            url_for("create_regular_cost_for_vehicle", vid=form.vehicle.data)
+        )
+
+    return render_template("selectVehicle.html", form=form)
+
+
+@app.route("/regular_costs/vehicle/<int:vid>/create", methods=["GET", "POST"])
+@login_required
+def create_regular_cost_for_vehicle(vid):
+    vehicle = Vehicle.query.get(vid)
+    if vehicle is None or vehicle not in current_user.vehicles:
+        return redirect(url_for("get_account_page"))
+
+    form = CreateRegularCostForm()
+
+    form.preinit_with_data()
+
+    if form.validate_on_submit():
+        regular_cost = RegularCost(
+            vid,
+            form.description.data,
+            form.costs.data,
+            form.days.data,
+            form.start_at.data,
+            form.ends_at.data,
+        )
+        db.session.add(regular_cost)
+        vehicle.regulars.append(regular_cost)
+        db.session.commit()
+        return redirect(url_for("get_pit_stops", _anchor="v" + str(vehicle.id)))
+
+    form.process()
+    return render_template(
+        "createRegularCostForm.html", form=form, vehicle=vehicle, messages=[]
+    )
+
+
+@app.route("/regular_costs/edit/<int:pid>", methods=["GET", "POST"])
+@login_required
+def edit_regular_form(pid):
+    edit_regular = RegularCost.query.get(pid)
+    if edit_regular is None:
+        return redirect(url_for("get_pit_stops"))
+
+    vehicle = Vehicle.query.filter(Vehicle.id == edit_regular.vehicle_id).first()
+    if vehicle not in current_user.vehicles:
+        return redirect(url_for("get_pit_stops"))
+
+    form = EditRegularCostForm()
+    form.preinit_with_data()
+
+    if not form.is_submitted():
+        form.costs.default = edit_regular.costs
+        form.start_at.default = edit_regular.start_at
+        form.ends_at.default = edit_regular.ends_at
+        form.days.default = edit_regular.days
+        form.description.default = edit_regular.description
+
+    if form.validate_on_submit():
+        edit_regular.start_at = form.start_at.data
+        edit_regular.ends_at = form.ends_at.data
+        edit_regular.costs = form.costs.data
+        edit_regular.days = form.days.data
+        edit_regular.description = form.description.data
+        db.session.commit()
+        db_log_update(edit_regular)
+        return redirect(url_for("get_pit_stops", _anchor="v" + str(vehicle.id)))
+
+    form.preinit_with_data()
+    form.process()
+    return render_template(
+        "editRegularCostForm.html",
+        form=form,
+        vehicle=vehicle,
+        messages=form.get_hint_messages(),
+    )
+
+
+@app.route("/regular_costs/end/<int:pid>", methods=["GET", "POST"])
+@login_required
+def end_regular_form(pid):
+    edit_regular = RegularCost.query.get(pid)
+    if edit_regular is None:
+        return redirect(url_for("get_pit_stops"))
+
+    vehicle = Vehicle.query.filter(Vehicle.id == edit_regular.vehicle_id).first()
+    if vehicle not in current_user.vehicles:
+        return redirect(url_for("get_pit_stops"))
+
+    form = EndRegularCostForm()
+    if form.validate_on_submit():
+        edit_regular.ends_at = date.today()
+        db.session.commit()
+        return redirect(url_for("get_pit_stops", _anchor="v" + str(vehicle.id)))
+
+    return render_template(
+        "endRegularCostForm.html",
+        form=form,
+        vehicle=vehicle,
+    )
+

app/static/js/main.js

@@ -12,7 +12,7 @@ function createChart(id, data, unit) {
             "axisAlpha": 0,
             "position": "left",
             "ignoreAxisWidth":true,
-//            "title": unit
+            "title": unit
         }],
         "balloon": {
             "borderThickness": 1,

app/templates/createRegularCostForm.html

@@ -0,0 +1,39 @@
+{% extends "layout.html" %}
+
+{% block body %}
+<div class="col-md-2" ></div>
+<div class="col-md-8">
+    <div class="panel panel-default">
+        <div class="panel-body">
+            <h3>New Regular Cost for '{{ vehicle.name }}'</h3>
+            <form class='form-horizontal' method="POST">
+                {{ form.hidden_tag() }}
+
+                {{ render_field_with_errors(form.start_at) }}
+                <span id="{{form.start_at.id}}_help" class="help-block">
+                    {{messages['start_at']}}
+                </span>
+
+                {{ render_field_with_errors(form.ends_at) }}
+                <span id="{{form.ends_at.id}}_help" class="help-block">
+                    {{messages['ends_at']}}
+                </span>
+
+                {{ render_field_with_errors(form.days) }}
+                <span>Format as 'Month-Day' (e.g. 05-25) and separate with ','.</span>
+                <span id="{{form.days.id}}_help" class="help-block">
+                    {{messages['days']}}
+                </span>
+
+                {{ render_field_with_errors(form.costs) }}
+                <span id="{{form.costs.id}}_help" class="help-block">
+                     {{messages['costs']}}
+                </span>
+                {{ render_field_with_errors(form.description) }}
+                {{ render_field_with_errors(form.submit) }}
+            </form>
+        </div>
+    </div>
+</div>
+<div class="col-md-2" ></div>
+{% endblock %}

app/templates/deleteRegularCostForm.html

@@ -0,0 +1,46 @@
+{% extends 'layout.html' %}
+
+{% block body %}
+<div class='col-md-2' ></div>
+<div class='col-md-8'>
+    <div class='panel panel-default'>
+        <div class='panel-body'>
+            <h3>Delete Regular Cost?</h3>
+            <table style='width: 100%' class="table table-striped table-bordered table-condensed">                
+                <tr>
+                    <th style='text-align:right'>Description of regular cost</th>
+                    <td style='text-align: left'>{{ regular_cost.description }}</td>
+                </tr>
+                <tr>
+                    <th style='text-align:right'>Costs (per instance)</th>
+                    <td style='text-align: left'>
+                        {% if regular_cost.costs %}
+                            {{ regular_cost.costs }}
+                        {% else %}
+                            --
+                        {% endif %}
+                        €
+                    </td>
+                </tr>
+                <tr>
+                    <th style='text-align:right'>Days for regular costs</th>
+                    <td style='text-align: left'>{{ regular_cost.days }}</td>
+                </tr>
+                <tr>
+                    <th style='text-align:right'>regular costs starting from</th>
+                    <td style='text-align: left'>{{ regular_cost.start_at }}</td>
+                </tr>
+                <tr>
+                    <th style='text-align:right'>regular costs ending at</th>
+                    <td style='text-align: left'>{{ regular_cost.ends_at }}</td>
+                </tr>
+            </table>
+            <form class='form-horizontal' method='POST'>
+                {{ form.hidden_tag() }}
+                {{ render_field_with_errors(form.submit) }}
+            </form>
+        </div>
+    </div>
+</div>
+<div class='col-md-2' ></div>
+{% endblock %}

app/templates/deleteVehicleForm.html

@@ -8,7 +8,7 @@
             <h3>Delete vehicle '{{vehicle.name}}'?</h3>
             <form class='form-horizontal' method="POST">
                 {{ form.hidden_tag() }}
-                {{ render_field_with_errors(form.submit) }}
+                {{ render_field_with_errors(form.submit, include_cancel=True) }}
 
             </form>
         </div>

app/templates/editRegularCostForm.html

@@ -0,0 +1,39 @@
+{% extends "layout.html" %}
+
+{% block body %}
+<div class="col-md-2" ></div>
+<div class="col-md-8">
+    <div class="panel panel-default">
+        <div class="panel-body">
+            <h3>Edit Regular Cost for '{{ vehicle.name }}'</h3>
+            <form class='form-horizontal' method="POST">
+                {{ form.hidden_tag() }}
+
+                {{ render_field_with_errors(form.start_at) }}
+                <span id="{{form.start_at.id}}_help" class="help-block">
+                    {{messages['start_at']}}
+                </span>
+
+                {{ render_field_with_errors(form.ends_at) }}
+                <span id="{{form.ends_at.id}}_help" class="help-block">
+                    {{messages['ends_at']}}
+                </span>
+
+                {{ render_field_with_errors(form.days) }}
+                <span>Format as 'Month-Day' (e.g. 05-25) and separate with ','.</span>
+                <span id="{{form.days.id}}_help" class="help-block">
+                    {{messages['days']}}
+                </span>
+
+                {{ render_field_with_errors(form.costs) }}
+                <span id="{{form.costs.id}}_help" class="help-block">
+                     {{messages['costs']}}
+                </span>
+                {{ render_field_with_errors(form.description) }}
+
+                {{ render_field_with_errors(form.submit) }}
+            </form>
+        </div>
+    </div>
+</div>
+{% endblock %}

app/templates/endRegularCostForm.html

@@ -0,0 +1,16 @@
+{% extends "layout.html" %}
+
+{% block body %}
+<div class="col-md-2" ></div>
+<div class="col-md-8">
+    <div class="panel panel-default">
+        <div class="panel-body">
+            <h3>Edit Regular Cost for '{{ vehicle.name }}'</h3>
+            <form class='form-horizontal' method="POST">
+                {{ form.hidden_tag() }}
+                {{ render_field_with_errors(form.submit) }}
+            </form>
+        </div>
+    </div>
+</div>
+{% endblock %}

app/templates/layout.html

@@ -3,6 +3,7 @@
 		<li><a id='plan_pitstop_link' href='{{ url_for('select_vehicle_for_plan_pitstop') }}'>Plan Pitstop</a></li>
 		<li><a id='new_pitstop_link' href='{{ url_for('select_vehicle_for_new_pitstop') }}'>Create Pitstop</a></li>
 		<li><a id='new_service_link' href='{{ url_for('select_vehicle_for_new_service') }}'>Create Service</a></li>
+		<li><a id='new_service_link' href='{{ url_for('select_vehicle_for_new_regular_cost') }}'>Create Regular Cost</a></li>
 		<li><a id='statistics_limk' href='{{ url_for('get_statistics') }}'>Statistics</a></li>
 		<li><a id='account_link' href='{{ url_for('get_account_page') }}'>Account</a></li>
 		{% if current_user.has_role('admin') %}
@@ -15,20 +16,17 @@
 	{% endif %}
 {%- endmacro %}
 
-{% macro render_field_with_errors(field) %}
+{% macro render_field_with_errors(field, include_cancel=True) %}
 <div class="form-group">
 	{% if field.type == 'SubmitField' %}
-        <div class="col-md-4" ></div>
+        <div class="col-md-3" ></div>
-
+		<div class="col-sm-6" style="align:center">
-		<div class="col-sm-4" style="align:center">
+            {% if include_cancel %}
+    			<input id="{{ field.id }}_cancel" name="{{ field.id }}_cancel" class="btn btn-default" type="submit" value="Cancel" onclick="window.history.go(-1)">
+            {% endif %}
 			<input id="{{ field.id }}" name="{{ field.id }}" class="btn btn-default" type="submit" value="{{ field.label.text }}">
 		</div>
-    <!--
+        <div class="col-md-3" ></div>
-		<div class="col-sm-3" style="align:center">
-            <a class="btn btn-default" href="{{ g.data['back'] }}" role="button">Cancel</a>
-		</div>
-    -->
-        <div class="col-md-4" ></div>
 	{% else %}
 		<label class="col-sm-6 control-label">
 			{{ field.label }}

app/templates/pitstops.html

@@ -1,5 +1,92 @@
 {% extends "layout.html" %}
 
+{% macro regular(field, vindex, loop) -%}
+<div class="panel panel-default">
+    <div class="panel-body">
+        <div style="text-align: left; font-size: 20px;">
+            <span class="glyphicon glyphicon-repeat" aria-hidden="true" style="border: 1px solid black; padding: 5px 5px 3px; border-radius: 5px;" />
+        </div>
+        <table class="table table-striped table-bordered table-condensed">
+            <tr>
+                <th>Description</th>
+                <td id="vehicle_{{vindex}}_pitstop_{{loop.index}}_date">{{field.description}}</td>
+            </tr>
+            <tr>
+                <th>Costs</th>
+                <td id="vehicle_{{vindex}}_pitstop_{{loop.index}}_cost">
+                    {% if field.costs %}
+                        {{field.costs}} €
+                    {% else %}
+                        -- €
+                    {% endif %}
+                </td>
+            </tr>
+            <tr>
+                <th>From</th>
+                <td id="vehicle_{{vindex}}_pitstop_{{loop.index}}_date">{{field.start_at}}</td>
+            </tr>
+            <tr>
+                <th>To</th>
+                <td id="vehicle_{{vindex}}_pitstop_{{loop.index}}_date">{{field.ends_at}}</td>
+            </tr>
+            <tr>
+                <th>Days</th>
+                <td id="vehicle_{{vindex}}_pitstop_{{loop.index}}_date">{{field.days}}</td>
+            </tr>
+        </table>
+        {% if loop.first %}
+        {% endif %}
+            <a id="vehicle_{{vindex}}_edit_regular_{{loop.index}}" href="{{ url_for('edit_regular_form', pid=field.id) }}" class="btn btn-primary">
+                <span class="glyphicon glyphicon-pencil" aria-hidden="true"></span> edit
+            </a>
+            <a id="vehicle_{{vindex}}_delete_regular_{{loop.index}}" href="{{ url_for('delete_regular_form', pid=field.id) }}" class="btn btn-primary btn-warning ">
+                <span class="glyphicon glyphicon-trash" aria-hidden="true"></span> delete
+            </a>
+    </div>
+</div>
+{%- endmacro %}
+
+{% macro regular_instance(field, vindex, loop) -%}
+<div class="panel panel-default">
+    <div class="panel-body">
+        <div style="text-align: left; font-size: 20px;">
+            <span class="glyphicon glyphicon-repeat" aria-hidden="true" style="border: 1px solid black; padding: 5px 5px 3px; border-radius: 5px;"></span>
+        </div>
+        <table class="table table-striped table-bordered table-condensed">
+            <tr>
+                <th>Date</th>
+                <td id="vehicle_{{vindex}}_pitstop_{{loop.index}}_date">{{field.date}}</td>
+            </tr>
+            <tr>
+                <th>Description</th>
+                <td id="vehicle_{{vindex}}_pitstop_{{loop.index}}_date">{{field.name}}</td>
+            </tr>
+            <tr>
+                <th>Costs</th>
+                <td id="vehicle_{{vindex}}_pitstop_{{loop.index}}_cost">
+                    {% if field.costs %}
+                        {{field.costs}} €
+                    {% else %}
+                        -- €
+                    {% endif %}
+                </td>
+            </tr>
+        </table>
+        {% if loop.first %}
+        {% endif %}
+            <a id="vehicle_{{vindex}}_edit_regular_{{loop.index}}" href="{{ url_for('edit_regular_form', pid=field.id) }}" class="btn btn-primary">
+                <span class="glyphicon glyphicon-pencil" aria-hidden="true"></span> edit
+            </a>
+            <a id="vehicle_{{vindex}}_end_regular_{{loop.index}}" href="{{ url_for('end_regular_form', pid=field.id) }}" class="btn btn-primary">
+                <span class="glyphicon glyphicon-remove-sign" aria-hidden="true"></span> end series
+            </a>
+            <a id="vehicle_{{vindex}}_delete_regular_{{loop.index}}" href="{{ url_for('delete_regular_form', pid=field.id) }}" class="btn btn-primary btn-warning ">
+                <span class="glyphicon glyphicon-trash" aria-hidden="true"></span> delete
+            </a>
+    </div>
+</div>
+{%- endmacro %}
+
 {% macro pitstop(field, vindex, loop) -%}
 <div class="panel panel-default">
     <div class="panel-body">
@@ -110,12 +197,22 @@
                             {% if 'Service' in data.__class__.__name__ %}
                                 {{ service(data, vehicleloop.index, loop) }}
                             {% endif %}
+                            {% if 'Regular' in data.__class__.__name__ %}
+                                {{ regular_instance(data, vehicleloop.index, loop) }}
+                            {% endif %}
+
                         {% endfor %}
                     {% else %}
                         <div class="alert alert-warning" role="alert">
                             not enough data: <a href="{{ url_for('select_consumable_for_new_pitstop', vid=vehicle.id) }}">log a pitstop</a>?
                         </div>
                     {% endif %}
+                    {% if vehicle.regulars %}
+                        <h4>Regular Costs</h4>
+                        {% for data in vehicle.regulars %}
+                            {{ regular(data, vehicleloop.index, loop) }}
+                        {% endfor %}
+                    {% endif %}
                 </div>
             {% endfor %}
         </div>

app/templates/statistics.html

@@ -25,7 +25,14 @@
 
 {% macro nav_tab(id, text, active) %}
     {#
+        Create a UI element to select the shown pane of a tabbed view
 
+        id:
+            id of the pane to select
+        text:
+            the text in the UI element
+        active:
+            boolean stating if the tab is active or not
     #}
     <li class="{% if active %}active{% endif %}">
         <a href="#ref_{{id}}" id="id_{{id}}" data-toggle="tab" >
@@ -87,7 +94,15 @@
                 <th>Logged Costs:</th>
                 <td>{{ vehicle.overall_costs | round(2) }} €</td>
             </tr>
-        </table>
+            <tr>
+                <th>Logged Costs per km:</th>
+                {% if vehicle.costs_per_distance != 'N/A' %}
+                    <td>{{ vehicle.costs_per_distance  | round(2) }} €/100km</td>
+                {% else %}
+                   <td>{{ vehicle.costs_per_distance }}</td>
+                {% endif %}
+            </tr>
+       </table>
     </div>
 {% endmacro %}
 
@@ -115,6 +130,7 @@
                     {{ print_vehicle_table(vehicle) }}
                     <ul id="vehicle_{{vehicle.id}}_tabs" class="nav nav-tabs" data-tabs="tabs">
                         {{ nav_tab(vehicle.id|string + '_odometer', 'Odometer', true) }}
+                        {{ nav_tab(vehicle.id|string + '_costs', 'Costs', false) }}
                         {% for consumable in vehicle.consumables %}
                             {{ nav_tab(vehicle.id|string + '_' + consumable.id|string, consumable.name, false) }}
                         {% endfor %}
@@ -131,6 +147,17 @@
                             true
                             )
                         }}
+                        {{ tab_pane(
+                            vehicle.id|string + '_costs',
+                            chart(
+                                vehicle.costs,
+                                'ref_' + vehicle.id|string + '_costs',
+                                '€',
+                                url_for('select_consumable_for_new_pitstop', vid=vehicle.id)
+                            ),
+                            false
+                            )
+                        }}
                         {% for consumable in vehicle.consumables %}
                             <div class="tab-pane" id="ref_{{vehicle.id}}_{{consumable.id}}">
                                 {{ print_consumable_table(consumable) }}

app/tools.py

@@ -7,6 +7,15 @@ from .entities import Pitstop, FillingStation
 from . import db, app
 
 
+class RegularCostInstance:
+    def __init__(self, regular_id, date, odometer, costs, name):
+        self.id = regular_id
+        self.date = date
+        self.odometer = odometer
+        self.costs = costs
+        self.name = name
+
+
 class ConsumableStats:
     def __init__(self, vehicle, consumable):
         self.name = consumable.name
@@ -19,7 +28,9 @@ class ConsumableStats:
         self.average_amount = []
         self.amounts = []
 
-        pitstops = [stop for stop in vehicle.pitstops if stop.consumable_id == consumable.id]
+        pitstops = [
+            stop for stop in vehicle.pitstops if stop.consumable_id == consumable.id
+        ]
         pitstop_count = len(pitstops)
 
         if pitstop_count > 0:
@@ -28,16 +39,27 @@ class ConsumableStats:
                 self.amounts.append(StatsEvent(pitstop.date, pitstop.amount))
             self.average_amount_fuelled = self.overall_amount / pitstop_count
         if pitstop_count > 1:
-            overall_distance = vehicle.pitstops[-1].odometer - vehicle.pitstops[0].odometer
+            overall_distance = (
+                vehicle.pitstops[-1].odometer - vehicle.pitstops[0].odometer
+            )
             self.average_distance = overall_distance / (pitstop_count - 1)
-            self.average_amount_used = 100 * (self.overall_amount - pitstops[0].amount) / overall_distance
+            self.average_amount_used = (
+                100 * (self.overall_amount - pitstops[0].amount) / overall_distance
+            )
             for index in range(1, pitstop_count):
                 last_ps = pitstops[index - 1]
                 current_ps = pitstops[index]
                 self.average_amount.append(
                     StatsEvent(
                         current_ps.date,
-                        round(100 * current_ps.amount / (current_ps.odometer - last_ps.odometer), 2)))
+                        round(
+                            100
+                            * current_ps.amount
+                            / (current_ps.odometer - last_ps.odometer),
+                            2,
+                        ),
+                    )
+                )
 
 
 class VehicleStats:
@@ -48,6 +70,8 @@ class VehicleStats:
         self.overall_costs = 0
         self.consumables = []
         self.odometers = []
+        self.costs = []
+        self.costs_per_distance = "N/A"
 
         for consumable in vehicle.consumables:
             self.consumables.append(ConsumableStats(vehicle, consumable))
@@ -60,27 +84,47 @@ class VehicleStats:
                 self.odometers.append(StatsEvent(pitstop.date, pitstop.odometer))
                 if pitstop.costs is not None:
                     self.overall_costs += pitstop.costs
+                    self.costs.append(StatsEvent(pitstop.date, pitstop.costs))
+
+        # add the instances to the overall costs
+        for regular_cost_instance in calculate_regular_cost_instances(vehicle):
+            self.overall_costs += regular_cost_instance.costs
+            self.costs.append(
+                StatsEvent(regular_cost_instance.date, regular_cost_instance.costs)
+            )
 
         if pitstop_count > 1:
             self.overall_distance = events[-1].odometer - events[0].odometer
 
+        self.costs.sort(key=lambda x: x.date)
+        accumulated_costs = 0
+        for c in self.costs:
+            accumulated_costs += c.value
+            c.value = accumulated_costs
+
+        if self.overall_distance > 0:
+            self.costs_per_distance = float(self.overall_costs) / (float(self.overall_distance) / 100)
+
 
 class StatsEvent:
     def __init__(self, date, value):
         self.date = date
         self.value = value
 
+    def __repr__(self):
+        return str(self.date)
+
 
 def db_log_add(entity):
-    logging.info('db_add: %s' % str(entity))
+    logging.info("db_add: %s" % str(entity))
 
 
 def db_log_delete(entity):
-    logging.info('db_delete: %s' % str(entity))
+    logging.info("db_delete: %s" % str(entity))
 
 
 def db_log_update(entity):
-    logging.info('db_update: %s' % str(entity))
+    logging.info("db_update: %s" % str(entity))
 
 
 def check_vehicle_name_is_unique(current_user, name_field):
@@ -107,10 +151,11 @@ def get_latest_pitstop_for_vehicle(vehicle_id):
     :param vehicle_id: the id of the vehicle
     :return: the latest pitstop or None if no pitstop exists
     """
-    latest_pitstop = Pitstop.query \
+    latest_pitstop = (
-        .filter(Pitstop.vehicle_id == vehicle_id) \
+        Pitstop.query.filter(Pitstop.vehicle_id == vehicle_id)
-        .order_by(Pitstop.id.desc()) \
+        .order_by(Pitstop.id.desc())
         .first()
+    )
     return latest_pitstop
 
 
@@ -121,15 +166,18 @@ def get_latest_pitstop_for_vehicle_and_consumable(vehicle_id, consumable_id):
     :param consumable_id: the id of the consumable
     :return: the latest pitstop or None if no pitstop exists
     """
-    latest_pitstop_consumable = Pitstop.query \
+    latest_pitstop_consumable = (
-        .filter(Pitstop.vehicle_id == vehicle_id) \
+        Pitstop.query.filter(Pitstop.vehicle_id == vehicle_id)
-        .filter(Pitstop.consumable_id == consumable_id) \
+        .filter(Pitstop.consumable_id == consumable_id)
-        .order_by(Pitstop.id.desc()) \
+        .order_by(Pitstop.id.desc())
         .first()
+    )
     return latest_pitstop_consumable
 
 
-def compute_lower_limits_for_new_pitstop(latest_pitstop, last_pitstop_consumable, consumable_id):
+def compute_lower_limits_for_new_pitstop(
+    latest_pitstop, last_pitstop_consumable, consumable_id
+):
     """
     This function figures out the lower limits for date and odometer of a new pitstop.
     :param latest_pitstop:
@@ -154,7 +202,7 @@ def compute_lower_limits_for_new_pitstop(latest_pitstop, last_pitstop_consumable
 
 
 def pitstop_service_key(x):
-    return x.odometer, x.date
+    return x.date, x.odometer
 
 
 def get_event_line_for_vehicle(vehicle):
@@ -170,45 +218,79 @@ def get_event_line_for_vehicle(vehicle):
 def chunks(l, n):
     """Yield successive n-sized chunks from l."""
     for i in range(0, len(l), n):
-        yield l[i:i + n]
+        yield l[i : i + n]
 
 
 def update_filling_station_prices(ids):
-    max_age = (datetime.now() - timedelta(minutes=15)).strftime('%Y-%m-%d %H:%M')
+    max_age = (datetime.now() - timedelta(minutes=15)).strftime("%Y-%m-%d %H:%M")
 
-    res = db.session. \
+    res = (
-        query(FillingStation). \
+        db.session.query(FillingStation)
-        filter(FillingStation.id.in_(ids)). \
+        .filter(FillingStation.id.in_(ids))
-        filter(or_(FillingStation.last_update == None, FillingStation.last_update < max_age)). \
+        .filter(
-        all()
+            or_(
+                FillingStation.last_update == None, FillingStation.last_update < max_age
+            )
+        )
+        .all()
+    )
 
     if len(res) > 0:
         id_map = {x.id: x for x in res}
         query_ids = [x.id for x in res]
-        api_key = app.config['TANKERKOENIG_API_KEY']
+        api_key = app.config["TANKERKOENIG_API_KEY"]
-        url = 'https://creativecommons.tankerkoenig.de/json/prices.php'
+        url = "https://creativecommons.tankerkoenig.de/json/prices.php"
 
         # documentation tells us to query max 10 filling stations at a time...
         for c in chunks(query_ids, 10):
-            params = {
+            params = {"apikey": api_key, "ids": ",".join(c)}
-                'apikey': api_key, 'ids': ','.join(c)
-            }
             response = requests.get(url, params=params)
             response_json = response.json()
-            if response_json['ok']:
+            if response_json["ok"]:
-                print(response_json)
+                prices = response_json["prices"]
-                prices = response_json['prices']
                 for price in prices:
                     id = price
                     station_status = prices[id]
-                    id_map[id].open = station_status['status'] == 'open'
+                    id_map[id].open = station_status["status"] == "open"
                     if id_map[id].open:
-                        id_map[id].diesel = station_status['diesel']
+                        id_map[id].diesel = station_status["diesel"]
-                        id_map[id].e10 = station_status['e10']
+                        id_map[id].e10 = station_status["e10"]
-                        id_map[id].e5 = station_status['e5']
+                        id_map[id].e5 = station_status["e5"]
                     id_map[id].last_update = datetime.now()
             else:
                 logging.error(
-                    'could not update filling stations because of {r} on URL {u}.'.format(r=str(response_json),
+                    "could not update filling stations because of {r} on URL {u}.".format(
-                                                                                          u=response.url))
+                        r=str(response_json), u=response.url
+                    )
+                )
         db.session.commit()
+
+
+def calculate_regular_cost_instances(vehicle):
+    data = []
+    for regular in vehicle.regulars:
+        if date.today() < regular.start_at:
+            # skip regular costs that are not yet active
+            continue
+        if regular.ends_at:
+            end_date = regular.ends_at
+        else:
+            end_date = date.today()
+
+        start_year = regular.start_at.year
+        end_year = end_date.year
+
+        for year in range(start_year, end_year + 1):
+            for day in regular.days.split(","):
+                m, d = day.split("-")
+                d = date(year, int(m), int(d))
+                if regular.start_at <= d and d <= end_date:
+                    r = RegularCostInstance(
+                        regular.id,
+                        date=d,
+                        odometer=None,
+                        costs=regular.costs,
+                        name=regular.description,
+                    )
+                    data.append(r)
+    return data