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4
.guix-authorizations
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(authorizations
(version 0)
(("A0C9 1947 734F 076F 5F08 E9FF 257D 284A 2A1D 3A32"
(name "Saku Laesvuori"))))

4
.guix-channel
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(channel
(version 0)
(url "https://git.datat.fi/ry/laskutin")
(directory ".guix/modules"))

105
.guix/modules/laskutin-package.scm
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(define-module (laskutin-package)
#:use-module (guix)
#:use-module (guix git-download)
#:use-module (guix build-system haskell)
#:use-module ((guix licenses) #:prefix license:)
#:use-module (guix packages)
#:use-module (gnu packages haskell)
#:use-module (gnu packages haskell-check)
#:use-module (gnu packages haskell-xyz))
(define vcs-file?
(or (git-predicate (string-append (current-source-directory) "/../.."))
(const #t)))
(define-public laskutin
(package
(name "laskutin")
(version "0.0.1")
(source (local-file "../.." "laskutin-checkout"
#:recursive? #t
#:select? vcs-file?))
(build-system haskell-build-system)
(inputs (list ghc-cassava
ghc-lens
ghc-optparse-applicative
ghc-purebred-email))
(home-page "https://git.datat.fi/ry/laskutin")
(synopsis "Simple mass invoicing program based on email and CSV")
(description "Laskutin is a simple program for sending and managing lots
invoices. Invoices are defined as rows in a CSV file and all state is stored
back into the file.")
(license license:agpl3+)))
;;; ghc-purebred-email
(define ghc-concise
(package
(name "ghc-concise")
(version "0.1.0.1")
(source (origin
(method url-fetch)
(uri (hackage-uri "concise" version))
(sha256
(base32
"09crgc6gjfidlad6263253xx1di6wfhc9awhira21s0z7rddy9sw"))))
(build-system haskell-build-system)
(properties '((upstream-name . "concise")))
(inputs (list ghc-lens))
(native-inputs (list ghc-tasty ghc-tasty-quickcheck ghc-quickcheck
ghc-quickcheck-instances))
(home-page "https://github.com/frasertweedale/hs-concise")
(synopsis "Utilities for Control.Lens.Cons")
(description
"concise provides a handful of functions to extend what you can do with
Control.Lens.Cons.")
(license license:bsd-3)))
(define ghc-purebred-email
(package
(name "ghc-purebred-email")
(version "0.6.0.1")
(source (origin
(method url-fetch)
(uri (hackage-uri "purebred-email" version))
(sha256
(base32
"0gdzdbxgsyps8hqd903bsyja0cr6kbklkicvma62q48wv0y7230j"))))
(build-system haskell-build-system)
(properties '((upstream-name . "purebred-email")))
(inputs (list ghc-attoparsec
ghc-case-insensitive
ghc-lens
ghc-base64-bytestring
ghc-concise
ghc-random
ghc-semigroupoids
ghc-stringsearch))
(native-inputs (list ghc-tasty
ghc-tasty-hedgehog
ghc-tasty-quickcheck
ghc-tasty-hunit
ghc-tasty-golden
ghc-hedgehog
ghc-quickcheck-instances))
(home-page "https://github.com/purebred-mua/purebred-email")
(synopsis "types and parser for email messages (including MIME)")
(description
"The purebred email library. RFC 5322, MIME, etc. See \"Data.MIME\" for usage,
examples and API documentation. . This is a general-purpose library for
processing and constructing email messages, originally written to meet the needs
of <https://github.com/purebred-mua/purebred purebred MUA>. Transmission and
delivery of mail are not part of this library, but /purebred-email/ could be a
useful building block for such systems. . Features and implemented
specifications include: . - <https://tools.ietf.org/html/rfc5322 RFC 5322>
message parsing and serialisation - MIME multipart messages
(<https://tools.ietf.org/html/rfc2046 RFC 2046>) - Convenient APIs for replying
and forward/bounce - Content transfer and charset decoding/encoding - MIME
message header extensions for non-ASCII text
(<https://tools.ietf.org/html/rfc2047 RFC 2047>) - MIME parameter value and
encoded word extensions (<https://tools.ietf.org/html/rfc2231 RFC 2231>) -
@@Content-Disposition@@ header field (<https://tools.ietf.org/html/rfc2183 RFC 2183>) - Address syntax in @@From@@ and @@Sender@@ fields
(<https://tools.ietf.org/html/rfc6854 RFC 6854>)")
(license license:agpl3+)))
laskutin

660
COPYING.md
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@ -1,660 +0,0 @@
### GNU AFFERO GENERAL PUBLIC LICENSE
Version 3, 19 November 2007
Copyright (C) 2007 Free Software Foundation, Inc.
<https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.
### Preamble
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The licenses for most software and other practical works are designed
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Developers that use our General Public Licenses protect your rights
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The GNU Affero General Public License is designed specifically to
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The precise terms and conditions for copying, distribution and
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### TERMS AND CONDITIONS
#### 0. Definitions.
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#### 2. Basic Permissions.
All rights granted under this License are granted for the term of
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permission to run the unmodified Program. The output from running a
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You may make, run and propagate covered works that you do not convey,
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Conveying under any other circumstances is permitted solely under the
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#### 3. Protecting Users' Legal Rights From Anti-Circumvention Law.
No covered work shall be deemed part of an effective technological
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similar laws prohibiting or restricting circumvention of such
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operation or modification of the work as a means of enforcing, against
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#### 4. Conveying Verbatim Copies.
You may convey verbatim copies of the Program's source code as you
receive it, in any medium, provided that you conspicuously and
appropriately publish on each copy an appropriate copyright notice;
keep intact all notices stating that this License and any
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keep intact all notices of the absence of any warranty; and give all
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You may charge any price or no price for each copy that you convey,
and you may offer support or warranty protection for a fee.
#### 5. Conveying Modified Source Versions.
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- a) The work must carry prominent notices stating that you modified
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- b) The work must carry prominent notices stating that it is
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- c) You must license the entire work, as a whole, under this
License to anyone who comes into possession of a copy. This
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- d) If the work has interactive user interfaces, each must display
Appropriate Legal Notices; however, if the Program has interactive
interfaces that do not display Appropriate Legal Notices, your
work need not make them do so.
A compilation of a covered work with other separate and independent
works, which are not by their nature extensions of the covered work,
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#### 6. Conveying Non-Source Forms.
You may convey a covered work in object code form under the terms of
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#### 7. Additional Terms.
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#### 8. Termination.
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However, if you cease all violation of this License, then your license
from a particular copyright holder is reinstated (a) provisionally,
unless and until the copyright holder explicitly and finally
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fails to notify you of the violation by some reasonable means prior to
60 days after the cessation.
Moreover, your license from a particular copyright holder is
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received notice of violation of this License (for any work) from that
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licenses of parties who have received copies or rights from you under
this License. If your rights have been terminated and not permanently
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material under section 10.
#### 9. Acceptance Not Required for Having Copies.
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a copy of the Program. Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance. However,
nothing other than this License grants you permission to propagate or
modify any covered work. These actions infringe copyright if you do
not accept this License. Therefore, by modifying or propagating a
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#### 10. Automatic Licensing of Downstream Recipients.
Each time you convey a covered work, the recipient automatically
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organization, or substantially all assets of one, or subdividing an
organization, or merging organizations. If propagation of a covered
work results from an entity transaction, each party to that
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the predecessor has it or can get it with reasonable efforts.
You may not impose any further restrictions on the exercise of the
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not impose a license fee, royalty, or other charge for exercise of
rights granted under this License, and you may not initiate litigation
(including a cross-claim or counterclaim in a lawsuit) alleging that
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sale, or importing the Program or any portion of it.
#### 11. Patents.
A "contributor" is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based. The
work thus licensed is called the contributor's "contributor version".
A contributor's "essential patent claims" are all patent claims owned
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but do not include claims that would be infringed only as a
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Each contributor grants you a non-exclusive, worldwide, royalty-free
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In the following three paragraphs, a "patent license" is any express
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actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.
If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance of, a
covered work, and grant a patent license to some of the parties
receiving the covered work authorizing them to use, propagate, modify
or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.
A patent license is "discriminatory" if it does not include within the
scope of its coverage, prohibits the exercise of, or is conditioned on
the non-exercise of one or more of the rights that are specifically
granted under this License. You may not convey a covered work if you
are a party to an arrangement with a third party that is in the
business of distributing software, under which you make payment to the
third party based on the extent of your activity of conveying the
work, and under which the third party grants, to any of the parties
who would receive the covered work from you, a discriminatory patent
license (a) in connection with copies of the covered work conveyed by
you (or copies made from those copies), or (b) primarily for and in
connection with specific products or compilations that contain the
covered work, unless you entered into that arrangement, or that patent
license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
#### 12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot convey a
covered work so as to satisfy simultaneously your obligations under
this License and any other pertinent obligations, then as a
consequence you may not convey it at all. For example, if you agree to
terms that obligate you to collect a royalty for further conveying
from those to whom you convey the Program, the only way you could
satisfy both those terms and this License would be to refrain entirely
from conveying the Program.
#### 13. Remote Network Interaction; Use with the GNU General Public License.
Notwithstanding any other provision of this License, if you modify the
Program, your modified version must prominently offer all users
interacting with it remotely through a computer network (if your
version supports such interaction) an opportunity to receive the
Corresponding Source of your version by providing access to the
Corresponding Source from a network server at no charge, through some
standard or customary means of facilitating copying of software. This
Corresponding Source shall include the Corresponding Source for any
work covered by version 3 of the GNU General Public License that is
incorporated pursuant to the following paragraph.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the work with which it is combined will remain governed by version
3 of the GNU General Public License.
#### 14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions
of the GNU Affero General Public License from time to time. Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns.
Each version is given a distinguishing version number. If the Program
specifies that a certain numbered version of the GNU Affero General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU Affero General Public License, you may choose any version ever
published by the Free Software Foundation.
If the Program specifies that a proxy can decide which future versions
of the GNU Affero General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
#### 15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
CORRECTION.
#### 16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
#### 17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
### How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these
terms.
To do so, attach the following notices to the program. It is safest to
attach them to the start of each source file to most effectively state
the exclusion of warranty; and each file should have at least the
"copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper
mail.
If your software can interact with users remotely through a computer
network, you should also make sure that it provides a way for users to
get its source. For example, if your program is a web application, its
interface could display a "Source" link that leads users to an archive
of the code. There are many ways you could offer source, and different
solutions will be better for different programs; see section 13 for
the specific requirements.
You should also get your employer (if you work as a programmer) or
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. For more information on this, and how to apply and follow
the GNU AGPL, see <https://www.gnu.org/licenses/>.

68
README.md
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@ -1,68 +0,0 @@
# Laskutin
Laskutin on yksinkertainen massalaskutusohjelma, jolla voidaan sähköpostittaa
ja hallinnoida CSV-tiedostoon kirjattuja laskuja. Laskutin osaa lähettää CSV:n
perusteella laskut ja maksumuistutukset, päivittää maksutilanteen
verkkopankista ladatusta tilitapahtumalistasta ja tulostaa tiivistelmän
maksujen tilanteesta.
Esimerkiksi databileiden osallistumismaksujen ja datatuotetilausten
laskuttamisessa on käytetty Laskutinta.
## Asentaminen
Lisää tämä git-tietovaranto [Guixin kanavalistaan][guix-channels]
seuraavankaltaisella pätkällä:
[guix-channels]: https://guix.gnu.org/manual/devel/en/guix.html#Specifying-Additional-Channels
```lisp
(channel
(name 'laskutin)
(url "https://git.datat.fi/ry/laskutin")
(branch "main")
(introduction
(make-channel-introduction
"3c3f4f7992ed98ebc7fc0d96169d6d2283cb5386"
(openpgp-fingerprint
"A0C9 1947 734F 076F 5F08 E9FF 257D 284A 2A1D 3A32"))))
```
Tämän jälkeen Laskutin on saatavilla `laskutin`-nimisenä pakettina kaikkialla
Guixissa. Voit esimerkiksi ottaa sen käyttöön komentotulkkisessioosi komennolla
`guix shell laskutin`.
## Ajaminen
Yleensä laskuttimen käyttö etenee seuraavasti:
1. Määritä laskut CSV-tiedostoon [mallin](./esimerkki.csv) mukaisesti
2. Aja `laskutin send`
3. Hae verkkopankista CSV-tiedosto tilitapahtumista
4. Aja `laskutin update`
5. Aja `laskutin status`
6. Jos kaikkia laskuja ei ole vielä maksettu, aja `laskutin send --reminders`
ja palaa kohtaan 3.
Jokaiselle komennolle tarvitsee määrittää oikeat asetukset komentorivillä
annettavilla valitsimilla. Mahdolliset valitsimet voi listata kirjoittamalla
komennon perään `--help`-valitsimen.
## Kehittäminen
Kehitysympäristön saat helposti Guixilla ajamalla komennon [`guix
shell`][guix-shell] tässä hakemistossa. Muutoksia, vikailmoituksia ja
kehitysideoita voi jättää Giteassa tai sähköpostilla osoitteeseen
<saku@laesvuori.fi>. Tarkista, että laskutin kääntyy vielä muutostesi jälkeen
ajamalla komento `guix time-machine -C channels.scm -- build -f guix.scm`.
[guix-shell]: https://guix.gnu.org/manual/devel/en/guix.html#Invoking-guix-shell
## Kopioiminen
Laskutin on [GNU AGPL lisenssin version kolme](COPYING.md), tai valintasi
mukaan minkä tahansa myöhemmän [Free Software Foundationin julkaiseman
version][fsf-agpl], alainen vapaa ohjelma, eli se kunniottaa käyttäjiensä
vapautta päättää itse omasta tietojenkäsittelystään ja auttaa toisiaan.
[fsf-agpl]: https://www.gnu.org/licenses/agpl-3.0.html

4
Setup.hs
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@ -1,4 +0,0 @@
import Distribution.Simple
main :: IO ()
main = defaultMain

11
channels.scm
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@ -1,11 +0,0 @@
(list (channel
(name 'guix)
(url "https://git.savannah.gnu.org/git/guix.git")
(branch "master")
(commit
"ee0cf3b9ff4cd5a9d3637d09677195ea9ee1a8c0")
(introduction
(make-channel-introduction
"9edb3f66fd807b096b48283debdcddccfea34bad"
(openpgp-fingerprint
"BBB0 2DDF 2CEA F6A8 0D1D E643 A2A0 6DF2 A33A 54FA")))))

4
esimerkki.csv
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@ -1,4 +0,0 @@
sposti,viite,maksettu,"Tuote:12,00€","Juttu:10,00€","Esine:2,00€"
erkki@esimerkki.fi,101,"0,00€",1,1,1
alice@example.com,102,"0,00€",2,2,
bob@example.com,103,"0,00€",,1,3
1 sposti viite maksettu Tuote:12,00€ Juttu:10,00€ Esine:2,00€
2 erkki@esimerkki.fi 101 0,00€ 1 1 1
3 alice@example.com 102 0,00€ 2 2
4 bob@example.com 103 0,00€ 1 3

1
guix.scm
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@ -1 +0,0 @@
.guix/modules/laskutin-package.scm

33
laskutin.cabal
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@ -1,33 +0,0 @@
cabal-version: 3.6
name: laskutin
version: 0.0.1
author: Saku Laesvuori
license: AGPL-3.0-or-later
license-file: COPYING.md
build-type: Simple
stability: alpha
executable laskutin
build-depends:
base,
bytestring,
cassava,
containers,
lens,
optparse-applicative,
process,
purebred-email,
text,
time,
unordered-containers,
vector
main-is: Main.hs
other-modules:
Laskutin,
Laskutin.CSV,
Laskutin.Email,
Laskutin.Options,
Laskutin.Status,
Laskutin.Types
hs-source-dirs: src
default-language: Haskell2010

52
saku-laesvuori.key Normal file
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@ -0,0 +1,52 @@
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80
src/Laskutin.hs
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@ -1,80 +0,0 @@
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
module Laskutin where
import Control.Concurrent (threadDelay)
import Control.Monad (forM_, forM)
import Data.Csv (encodeByName)
import Data.List.NonEmpty (nonEmpty, singleton)
import Data.MIME (Address, renderAddresses)
import Data.Maybe (fromMaybe, mapMaybe)
import Data.Text.Encoding (decodeUtf8)
import System.Exit (exitFailure)
import System.IO (stderr, hPutStrLn)
import qualified Data.ByteString.Lazy as LBS
import qualified Data.Text.IO as T
import Laskutin.CSV
import Laskutin.Email
import Laskutin.Options
import Laskutin.Types
import Laskutin.Status
main :: IO ()
main = do
Options {csv, command} <- parseOptions
case command of
Status -> statusMain csv
Send sendOptions -> sendInvoicesMain csv sendOptions
UpdateTable bankCsv -> updateTableMain csv bankCsv
sendInvoicesMain :: FilePath -> SendOptions -> IO ()
sendInvoicesMain csvPath options@SendOptions {email, sendmail, reminders, dryRun} = do
invoices <- readInvoices csvPath options
forM_ invoices $ \(address, invoice) -> do
case renderInvoice reminders invoice of
Nothing -> pure ()
Just (subject, body) -> do
case dryRun of
False -> do
sendEmail sendmail $ renderEmail [email] address subject body
putStr "Lähetetty osoitteeseen: "
T.putStrLn $ decodeUtf8 $ renderAddresses address
threadDelay (3 * 1000 * 1000)
True -> do
T.putStrLn $ "To: " <> decodeUtf8 (renderAddresses address)
T.putStrLn $ "From: " <> decodeUtf8 (renderAddresses [email])
T.putStrLn $ "\n" <> body
T.putStrLn "-------\n"
updateTableMain :: FilePath -> FilePath -> IO ()
updateTableMain invoiceCsv transactionCsv = do
(headers, csvInvoices) <- parseCsvFile invoiceCsv
(_, csvTransactions) <- parseCsvFile transactionCsv
let newInvoices = fmap (updateInvoices csvTransactions) csvInvoices
LBS.writeFile invoiceCsv $ encodeByName headers newInvoices
statusMain :: FilePath -> IO ()
statusMain invoiceCsv = do
(_, invoices) <- parseCsvFile invoiceCsv
T.putStr $ showStatus $ invoiceStatus invoices
updateInvoices :: [CsvTransaction] -> CsvInvoice -> CsvInvoice
updateInvoices transactions invoice@CsvInvoice {reference, ..}
| csvIsPaid invoice = invoice
| otherwise = CsvInvoice {paid = Just transactionsSum, ..}
where transactionsSum = sum $ map amount $ filter hasReference transactions
hasReference CsvTransaction {referenceOrMessage = Reference ref} = reference == ref
hasReference CsvTransaction {referenceOrMessage = Message _} = False
readInvoices :: FilePath -> SendOptions -> IO [([Address], Invoice)]
readInvoices csv SendOptions {account, recipient, subject, message, due} = do
(_, csvInvoices) <- parseCsvFile csv
forM csvInvoices $ \CsvInvoice {..} -> do
invoiceRows <- maybe (hPutStrLn stderr "No invoice rows in invoice" >> exitFailure) pure $
nonEmpty $ mapMaybe invoiceRowFromCsv rows
pure ([invoiceRecipient], Invoice { rows = invoiceRows, paid = fromMaybe 0 paid, ..})

134
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@ -1,134 +0,0 @@
{-# LANGUAGE DisambiguateRecordFields #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
module Laskutin.CSV (CsvInvoice(..), CsvTransaction(..), TransactionMessage(..), csvInvoiceSum, csvInvoiceRowSum, csvIsPaid, parseCsvFile, invoiceRowFromCsv) where
import Data.Bifunctor (bimap, second)
import Control.Monad ((>=>), guard)
import Data.Char (isDigit)
import Data.HashMap.Strict (delete)
import Data.MIME (Address, address, renderAddress, defaultCharsets, parse)
import Data.Text (Text)
import Data.Text.Encoding (decodeUtf8, encodeUtf8)
import Data.Time (Day)
import Data.Time.Format.ISO8601 (iso8601ParseM)
import Data.Vector (Vector, toList)
import System.Exit (exitFailure)
import System.IO (stderr, hPutStrLn)
import Data.Csv
import qualified Data.ByteString as BS
import qualified Data.ByteString.Lazy as LBS
import qualified Data.HashMap.Strict as HM
import qualified Data.Text as T
import Laskutin.Types
data CsvInvoice = CsvInvoice
{ invoiceRecipient :: Address
, reference :: Reference
, paid :: Maybe Euro
, rows :: [CsvInvoiceRow]
} deriving Show
data CsvInvoiceRow = CsvInvoiceRow
{ amount :: Maybe Int
, price :: Euro
, name :: Text
} deriving Show
data CsvTransaction = CsvTransaction
{ date :: Day
, transactor :: Text
, referenceOrMessage :: TransactionMessage
, transactionType :: Text
, amount :: Euro
} deriving Show
csvIsPaid :: CsvInvoice -> Bool
csvIsPaid CsvInvoice {paid = Nothing} = False
csvIsPaid invoice@CsvInvoice {paid = Just paid} = paid >= csvInvoiceSum invoice
csvInvoiceSum :: CsvInvoice -> Euro
csvInvoiceSum CsvInvoice {rows} = sum $ csvInvoiceRowSum <$> rows
csvInvoiceRowSum :: CsvInvoiceRow -> Euro
csvInvoiceRowSum CsvInvoiceRow {amount, price} = maybe 0 ((* price) . fromIntegral) amount
data TransactionMessage = Message Text
| Reference Reference
deriving Show
instance FromField Address where
parseField field = either (const $ fail $ "Invalid email: " <> show field) pure $ parse (address defaultCharsets) field
instance ToField Address where
toField = renderAddress
instance FromField Day where
parseField = iso8601ParseM . T.unpack . decodeUtf8
instance FromField TransactionMessage where
parseField field' =
let field = decodeUtf8 field'
in case readReference $ T.unpack field of
Just reference -> pure $ Reference reference
Nothing -> pure $ Message field
instance FromNamedRecord CsvInvoice where
parseNamedRecord row = CsvInvoice
<$> row .: emailField
<*> row .: referenceField
<*> row .: paidField
<*> namedRecordToRows (foldr delete row [emailField, referenceField, paidField])
instance ToNamedRecord CsvInvoice where
toNamedRecord CsvInvoice {invoiceRecipient, reference, paid, rows} = namedRecord $
[ emailField .= invoiceRecipient
, referenceField .= reference
, paidField .= paid
] <> (invoiceRowToField <$> rows)
invoiceRowToField :: CsvInvoiceRow -> (BS.ByteString, BS.ByteString)
invoiceRowToField CsvInvoiceRow {amount, price, name} = encodeUtf8 (name <> ":" <> renderEuro price) .= amount
instance FromNamedRecord CsvTransaction where
parseNamedRecord row = CsvTransaction
<$> row .: encodeUtf8 "Päivämäärä"
<*> row .: encodeUtf8 "Maksaja tai saaja"
<*> row .: encodeUtf8 "Viite tai viesti"
<*> row .: encodeUtf8 "Selite"
<*> row .: encodeUtf8 "Määrä EUR"
namedRecordToRows :: NamedRecord -> Parser [CsvInvoiceRow]
namedRecordToRows = mapM (parseInvoiceRow . bimap decodeUtf8 decodeUtf8) . HM.toList
where parseInvoiceRow (header', amount') = do
let amount = readInt amount'
Just (name, price) <- pure $ readHeader header'
pure CsvInvoiceRow {amount, name, price}
readInt x = do
guard $ not $ T.null x
guard $ T.all isDigit x
pure $ read $ T.unpack x
readHeader x = do
[name, price'] <- pure $ T.splitOn ":" x
price <- readEuro price'
pure (name, price)
emailField, referenceField, paidField :: BS.ByteString
emailField = "sposti"
referenceField = "viite"
paidField = "maksettu"
handleParseErrors :: Either String (a, Vector b) -> IO (a, [b])
handleParseErrors = either (hPutStrLn stderr >=> const exitFailure) (pure . second toList)
parseCsvFile :: FromNamedRecord a => FilePath -> IO (Header, [a])
parseCsvFile = LBS.readFile >=> handleParseErrors . decodeByName
invoiceRowFromCsv :: CsvInvoiceRow -> Maybe InvoiceRow
invoiceRowFromCsv CsvInvoiceRow {amount, name, price} =
maybe Nothing (\amount -> Just InvoiceRow {name, price, amount}) amount

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src/Laskutin/Email.hs
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{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE TupleSections #-}
module Laskutin.Email where
import Data.Text (Text)
import Data.MIME (Address, createTextPlainMessage, defaultCharsets, headerSubject, headerFrom, headerTo, headerBCC, renderMessage)
import Control.Lens (set)
import Data.Semigroup (sconcat)
import Data.Time.Calendar
import Data.ByteString.Lazy (ByteString)
import System.Process (CreateProcess(..), StdStream(..), createProcess, proc, waitForProcess)
import System.Exit (ExitCode(..))
import System.IO (hClose)
import Control.Exception (ErrorCall(..), throwIO)
import qualified Data.List.NonEmpty as NE
import qualified Data.Text as T
import qualified Data.ByteString.Lazy as LBS
import Laskutin.Types
renderEmail :: [Address] -> [Address] -> Text -> Text -> ByteString
renderEmail senders recipients subject = renderMessage
. set (headerBCC defaultCharsets) senders
. set (headerTo defaultCharsets) recipients
. set (headerFrom defaultCharsets) senders
. set (headerSubject defaultCharsets) (Just subject)
. createTextPlainMessage
sendEmail :: FilePath -> ByteString -> IO ()
sendEmail sendmail email = do
(Just sendmailStdin, _, _, sendmailProcess) <- createProcess (proc sendmail ["-t"]) {std_in = CreatePipe}
LBS.hPut sendmailStdin email
hClose sendmailStdin
exitCode <- waitForProcess sendmailProcess
case exitCode of
ExitSuccess -> pure ()
ExitFailure code -> throwIO $ ErrorCall ("sendmail exited with error code " <> show code)
renderInvoice :: Bool -> Invoice -> Maybe (Text, Text)
renderInvoice isReminder invoice@Invoice {rows, reference, account, recipient, due, subject, message, paid}
| invoiceSum invoice <= 0 && isReminder = Nothing
| otherwise = Just $ (subjectPrefix <> " – " <> subject,) $
(if isReminder then "Muistutus alla olevan laskun maksamisesta. Jos olet juuri maksanut kyseisen laskun, tämä muistutus on aiheeton.\n\n" else mempty)
<> (if T.null message then mempty else (message <> "\n\n\n"))
<> sconcat (NE.map renderInvoiceRow rows) <> "\n"
<> (if paid > 0 then renderInvoiceRow InvoiceRow {name = "Aiemmat maksut", amount = 1, price = paid} <> "\n" else mempty)
<> renderInvoiceRow InvoiceRow {name = "MAKSETTAVAA", amount = 1, price = invoiceSum invoice} <> "\n"
<> "Maksu tilisiirrolla\n\n"
<> "Viitenumero: " <> renderReference reference <> "\n"
<> "Tilinumero: " <> renderIBAN account <> "\n"
<> "Vastaanottaja: " <> recipient <> "\n"
<> maybe mempty (("Eräpäivä: " <>) . renderDay) due
where renderDay (YearMonthDay year month day) =
T.pack $ show day <> "." <> show month <> "." <> show year
subjectPrefix = if isReminder then "Maksumuistutus" else "Lasku"
invoiceRowSum :: InvoiceRow -> Euro
invoiceRowSum InvoiceRow {amount, price} = fromIntegral amount * price
invoiceSum :: Invoice -> Euro
invoiceSum Invoice {rows, paid} = subtract paid $ sum $ invoiceRowSum <$> rows
renderInvoiceRow :: InvoiceRow -> Text
renderInvoiceRow row@InvoiceRow {name, price, amount}
| amount > 1 = name <> ", " <> renderEuro price <> "/kpl * " <> T.pack (show amount) <> "kpl: " <> renderEuro (invoiceRowSum row) <> "\n"
| amount == 1 = name <> ": " <> renderEuro price <> "\n"
| otherwise = ""

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src/Laskutin/Options.hs
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{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE NoFieldSelectors #-}
module Laskutin.Options (Options(..), SendOptions(..), Command(..), parseOptions) where
import Data.Text (Text)
import Data.Time (Day)
import Data.MIME (Address, address, defaultCharsets, parse)
import qualified Data.Text as T
import qualified Data.Text.Encoding as T
import Options.Applicative
import Laskutin.Types
data Options = Options
{ csv :: FilePath
, command :: Command
}
data Command = Send SendOptions
| UpdateTable FilePath
| Status
data SendOptions = SendOptions
{ account :: IBAN
, recipient :: Text
, subject :: Text
, message :: Text
, due :: Maybe Day
, email :: Address
, sendmail :: FilePath
, reminders :: Bool
, dryRun :: Bool
}
parseOptions :: IO Options
parseOptions = execParser $ info (options <**> helper)
(fullDesc <> progDesc "Send email invoices from CSV" <> header "laskutin - email invoice sender")
options :: Parser Options
options = Options
<$> strOption (long "file" <> help "Path to the csv file" <> metavar "FILE")
<*> subparser
(command "send" (info (sendOptions <**> helper) (progDesc "Send email invoices from CSV"))
<> command "update" (info (updateTableOptions <**> helper) (progDesc "Update invoice CSV from a bank CSV"))
<> command "status" (info (pure Status) (progDesc "Print the status of the invoices")))
updateTableOptions :: Parser Command
updateTableOptions = UpdateTable <$> strOption (long "bank-csv" <> metavar "FILE")
sendOptions :: Parser Command
sendOptions = fmap Send $ SendOptions
<$> option (maybeReader $ readIBAN . T.pack) (long "iban" <> help "IBAN account" <> metavar "IBAN")
<*> strOption (long "recipient" <> help "The recipient of the payments" <> metavar "TEXT")
<*> strOption (long "subject" <> help "Subject of the invoice" <> metavar "TEXT")
<*> strOption (long "message" <> help "Additional message" <> value "" <> metavar "TEXT")
<*> optional (option auto (long "due" <> help "Due date in YYYY-MM-DD format" <> metavar "DATE"))
<*> option (eitherReader $ parse (address defaultCharsets) . T.encodeUtf8 . T.pack)
(long "email" <> help "Invoice sender email address" <> metavar "EMAIL")
<*> strOption (long "sendmail" <> short 'm' <> metavar "FILE" <> help "The sendmail program to use")
<*> switch (long "reminders" <> short 'r' <> help "Send reminder emails")
<*> switch (long "dry-run" <> short 'd' <> help "Only print what invoices would be sent. Do not send anything")

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src/Laskutin/Status.hs
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{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
module Laskutin.Status where
import Data.Maybe (fromMaybe)
import Data.Text (Text)
import qualified Data.Text as T
import Laskutin.Types
import Laskutin.CSV
data InvoiceStatus = InvoiceStatus
{ nPaid :: Int
, nTotal :: Int
, amountPaid :: Euro
, amountMissing :: Euro
, amountTotal :: Euro
} deriving Show
invoiceStatus :: [CsvInvoice] -> InvoiceStatus
invoiceStatus = InvoiceStatus
<$> length . filter csvIsPaid
<*> length
<*> sum . fmap (\CsvInvoice {paid} -> fromMaybe 0 paid)
<*> sum . fmap (\invoice@CsvInvoice {paid} -> max 0 $ csvInvoiceSum invoice - fromMaybe 0 paid)
<*> sum . fmap csvInvoiceSum
showStatus :: InvoiceStatus -> Text
showStatus InvoiceStatus {..} =
"Laskuja maksettu: " <> T.pack (show nPaid) <> "\n" <>
"Laskuja maksamatta: " <> T.pack (show $ nTotal - nPaid) <> "\n" <>
"Laskuja yhteensä: " <> T.pack (show nTotal) <> "\n" <>
"\n" <>
"Maksettu: " <> renderEuro amountPaid <> "\n" <>
"Maksamatta: " <> renderEuro amountMissing <> "\n" <>
"Yhteensä saatavia: " <> renderEuro amountTotal <> "\n" <>
"Ylimaksettu: " <> renderEuro (amountMissing + amountPaid - amountTotal) <> "\n"

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src/Laskutin/Types.hs
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{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE NoFieldSelectors #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE NamedFieldPuns #-}
module Laskutin.Types
( InvoiceRow(..)
, Euro
, IBAN
, Invoice(..)
, Reference
, createReference
, readEuro
, readIBAN
, readReference
, renderEuro
, renderIBAN
, renderReference
) where
import Control.Monad (guard)
import Data.Char (isSpace, isDigit, toUpper)
import Data.List.NonEmpty (NonEmpty)
import Data.Ratio (numerator, denominator)
import Data.Text (Text)
import Data.Text.Encoding (decodeUtf8, encodeUtf8)
import Data.Time (Day)
import Data.Csv (FromField(..), ToField(..))
import Data.Maybe (fromMaybe)
import qualified Data.Text as T
data InvoiceRow = InvoiceRow
{ price :: Euro
, amount :: Int
, name :: Text
} deriving (Show, Eq)
data Invoice = Invoice
{ rows :: NonEmpty InvoiceRow
, reference :: Reference
, account :: IBAN
, recipient :: Text
, subject :: Text
, message :: Text
, due :: Maybe Day
, paid :: Euro
} deriving (Show, Eq)
data Reference = Reference {base :: [Digit], checksum :: Digit}
deriving (Show, Eq)
data Digit = D0 | D1 | D2 | D3 | D4 | D5 | D6 | D7 | D8 | D9
deriving (Show, Eq)
data IBAN = IBAN {country :: Text, checksum :: (Digit, Digit), account :: Text}
deriving (Show, Eq)
newtype Euro = Euro Integer -- Cents
deriving (Eq, Ord, Show)
readIBAN :: Text -> Maybe IBAN
readIBAN text = do
let text' = T.map toUpper $ T.filter (not . isSpace) text
guard $ T.all ((||) <$> isDigit <*> (`elem` ['A'..'Z'])) text'
let (country, rest) = T.splitAt 2 text'
(checksum', account) = T.splitAt 2 rest
guard $ T.length country == 2
[a,b] <- sequence $ readDigit <$> T.unpack checksum'
let checksum = (a,b)
guard $ T.length account <= 30 -- TODO: this could check some country specific lengths
let str = T.unpack $ account <> country <> checksum'
charToNum c
| isDigit c = [c]
| otherwise = show $ fromEnum c - fromEnum 'A' + 10
remainder = read (concatMap charToNum str) `mod` 97
guard $ remainder == (1 :: Integer)
pure IBAN {country, checksum, account}
renderIBAN :: IBAN -> Text
renderIBAN IBAN {country, checksum, account} =
T.unwords $ T.chunksOf 4 $ country <> renderedChecksum <> account
where renderedChecksum = let (a,b) = checksum in T.pack $ renderDigit <$> [a,b]
createReference :: String -> Maybe Reference
createReference s = do
base <- sequence $ readDigit <$> s
guard $ length base >= 3
let checksum = computeReferenceChecksum base
pure Reference {base, checksum}
readReference :: String -> Maybe Reference
readReference s = do
digits <- sequence $ readDigit <$> filter (not . isSpace) s
guard $ length digits >= 4
let checksum = last digits
base = init digits
guard $ computeReferenceChecksum base == checksum
pure $ Reference {checksum, base}
computeReferenceChecksum :: [Digit] -> Digit
computeReferenceChecksum base =
let checksum' = (`mod` 10) $ sum $ zipWith (*) (digitToInt <$> reverse base) (cycle [7,3,1])
in fromMaybe (error "Impossible") $ intToDigit $ if checksum' == 0 then 0 else 10-checksum'
renderReference :: Reference -> Text
renderReference Reference {base, checksum} = T.pack $ (renderDigit <$> base) <> [renderDigit checksum]
renderReferenceBase :: Reference -> Text
renderReferenceBase Reference {base} = T.pack $ renderDigit <$> base
euroToCents :: Euro -> Integer
euroToCents (Euro a) = a
renderEuro :: Euro -> Text
renderEuro = do
euros <- T.pack . show . (`div` 100) . euroToCents
cents <- T.justifyRight 2 '0' . T.pack . show . (`mod` 100) . euroToCents
pure $ euros <> "," <> cents <> "€"
-- TODO: Test with negative euros
readEuro :: Text -> Maybe Euro
readEuro text'' = do
guard $ not $ T.null text''
let text' = if T.last text'' == '€' then T.init text'' else text''
(sign, text) = if T.head text' == '-' then (negate, T.tail text') else (id, text')
guard $ T.all (\c -> c `elem` (",." :: [Char]) || isSpace c || isDigit c) text
sign <$> case T.split (`elem` (",." :: [Char])) $ T.filter (not . isSpace) text of
[euros, cents] -> do
guard $ T.length cents <= 2
pure $ Euro (100 * read (T.unpack euros)) + Euro (read $ T.unpack $ T.justifyLeft 2 '0' cents)
[euros] -> pure $ Euro (100 * read (T.unpack euros))
_ -> Nothing
-- XXX: Do these instances make any sense. Multiplying euros with euros is quite weird
instance Num Euro where
(Euro a) + (Euro b) = Euro (a + b)
(Euro a) * (Euro b) = Euro (a * b `div` 100)
abs (Euro a) = Euro (abs a)
signum (Euro a) = Euro (signum a)
negate (Euro a) = Euro (negate a)
fromInteger x = Euro (fromInteger x * 100)
instance Fractional Euro where
fromRational rational = Euro $ (numerator rational * 100) `div` denominator rational
(Euro a) / (Euro b) = Euro $ (a * 100) `div` b
instance FromField Reference where
parseField field = maybe (fail $ "Invalid reference: " <> show field) pure $
createReference $ T.unpack $ decodeUtf8 field
instance ToField Reference where
toField = encodeUtf8 . renderReferenceBase
instance FromField Euro where
parseField field = maybe (fail $ "Invalid euro field: " <> show field) pure $
readEuro $ decodeUtf8 field
instance ToField Euro where
toField = encodeUtf8 . renderEuro
readDigit :: Char -> Maybe Digit
readDigit '0' = Just D0
readDigit '1' = Just D1
readDigit '2' = Just D2
readDigit '3' = Just D3
readDigit '4' = Just D4
readDigit '5' = Just D5
readDigit '6' = Just D6
readDigit '7' = Just D7
readDigit '8' = Just D8
readDigit '9' = Just D9
readDigit _ = Nothing
renderDigit :: Digit -> Char
renderDigit D0 = '0'
renderDigit D1 = '1'
renderDigit D2 = '2'
renderDigit D3 = '3'
renderDigit D4 = '4'
renderDigit D5 = '5'
renderDigit D6 = '6'
renderDigit D7 = '7'
renderDigit D8 = '8'
renderDigit D9 = '9'
digitToInt :: Digit -> Int
digitToInt digit = read [renderDigit digit]
intToDigit :: Int -> Maybe Digit
intToDigit x = case show x of
[c] -> readDigit c
_ -> Nothing

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src/Main.hs
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module Main where
import qualified Laskutin
main :: IO ()
main = Laskutin.main