(define-module (arunisaac meetfree)
  #:use-module ((forge nginx) #:select (forge-nginx-service-type))
  #:use-module ((gnu packages admin) #:select (shadow))
  #:use-module ((gnu packages check) #:select (python-pytest))
  #:use-module ((gnu packages nss) #:select (nss-certs))
  #:use-module ((gnu packages python) #:select (python))
  #:use-module ((gnu packages python-build)
                #:select (python-flit-core
                          python-hatch-vcs
                          python-hatchling
                          python-pypa-build
                          python-setuptools))
  #:use-module ((gnu packages python-web)
                #:select (python-bottle python-requests))
  #:use-module ((gnu packages python-xyz)
                #:select (python-flit python-markdown))
  #:use-module ((gnu packages time)
                #:select (python-dateutil python-tzdata))
  #:use-module ((gnu packages xml) #:select (python-lxml))
  #:use-module (gnu services)
  #:use-module ((gnu services web)
                #:select (gunicorn-app
                          gunicorn-service-type
                          nginx-server-configuration
                          nginx-location-configuration))
  #:use-module (gnu system accounts)
  #:use-module (gnu system file-systems)
  #:use-module ((gnu system shadow) #:select (account-service-type))
  #:use-module (guix build-system pyproject)
  #:use-module (guix build-system python)
  #:use-module (guix download)
  #:use-module (guix gexp)
  #:use-module (guix git-download)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module (guix profiles)
  #:use-module (guix records)
  #:use-module (guix utils)
  #:export (meetfree-service-type

            meetfree-configuration
            meetfree-configuration-python-meetfree
            meetfree-configuration-server-name
            meetfree-configuration-allowed-groups))

(define-public python-feedgen
  (package
    (name "python-feedgen")
    (version "1.0.0")
    (source
     (origin
       (method url-fetch)
       (uri (pypi-uri "feedgen" version))
       (sha256
        (base32 "0sjljdip5ffkwphqh49irhprywic9n671hwq56js4mp9np1m3gfr"))))
    (build-system pyproject-build-system)
    (propagated-inputs
     (list python-dateutil
           python-lxml))
    (native-inputs
     (list python-pytest
           python-setuptools))
    (home-page "https://lkiesow.github.io/python-feedgen")
    (synopsis "Feed Generator (ATOM, RSS, Podcasts)")
    (description
     "This module can be used to generate web feeds in both Atom and RSS
format.  It supports extensions.  For example, it comes with an
extension to produce podcasts.")
    (license (list license:bsd-2
                   license:lgpl3+))))

(define-public python-icalendar
  (package
    (name "python-icalendar")
    (version "7.0.3")
    (source
     (origin
       (method url-fetch)
       (uri (pypi-uri "icalendar" version))
       (sha256
        (base32 "1plgdlhnij79awxqvlfdfhgq4xaqy9hkgw35sy273f3s1377w0lm"))))
    (build-system pyproject-build-system)
    (arguments
     (list #:phases
           #~(modify-phases %standard-phases
               (add-after 'unpack 'relax-tzdata-dependency
                 (lambda _
                   ;; Relax tzdata dependency to latest available in
                   ;; Guix at the moment.
                   (substitute* "pyproject.toml"
                     (("\"tzdata>=2025.3\"")
                      "\"tzdata>=2025.1\"")))))))
    (propagated-inputs (list python-dateutil
                             python-tzdata))
    (native-inputs (list python-hatch-vcs
                         python-hatchling))
    (home-page "https://icalendar.readthedocs.io/en/stable/")
    (synopsis "iCalendar parser and generator")
    (description "The icalendar package is an RFC 5545 compatible
parser and generator of iCalendar files.  icalendar can create,
inspect, and modify calendaring information with Python.  icalendar
supports multiple timezone implementations, including zoneinfo,
dateutil.tz, and pytz.")
    (license license:bsd-3)))

(define-public python-justhtml
  (package
    (name "python-justhtml")
    (version "1.12.0")
    (source
     (origin
       (method git-fetch)
       (uri (git-reference
              (url "https://github.com/emilstenstrom/justhtml")
              (commit (string-append "v" version))))
       (file-name (git-file-name name version))
       (sha256
        (base32 "065iqikxrhwn6f5svlsv3fzpdri49h74ng8gfpsd4hgjknwrwqgn"))))
    (build-system pyproject-build-system)
    (native-inputs (list python-pypa-build
                         python-hatchling))
    (home-page "https://github.com/emilstenstrom/justhtml")
    (synopsis "Pure Python HTML5 parser")
    (description
     "JustHTML is a pure Python HTML5 parser.  It has a simple API and
does not require C extensions or system dependencies.")
    (license license:expat)))

(define-public python-meetfree
  (let ((commit "c263cba1c784ba8d776e655d3f56b8d583b503c5")
        (revision "0"))
    (package
      (name "meetfree")
      (version (git-version "0.1.0" revision commit))
      (source (origin
                (method git-fetch)
                (uri (git-reference
                       (url "https://git.systemreboot.net/meetfree")
                       (commit commit)))
                (file-name (git-file-name name version))
                (sha256
                 (base32
                  "1ai72gc2dk26a7g1fkm7l74mgxvqx8bjd14g4y7c381jm0xrwn9j"))))
      (build-system pyproject-build-system)
      (propagated-inputs
       (list python-bottle
             python-feedgen
             python-icalendar
             python-justhtml
             python-markdown
             python-requests
             ;; FIXME: nss-certs shouldn't be here. But, we add it
             ;; because the gunicorn service is unable to pick up
             ;; dependencies in environment variables. Fix that
             ;; instead.
             nss-certs))
      (native-inputs
       (list python-flit-core))
      (home-page "https://forge.systemreboot.net/meetfree")
      (synopsis "iCalendar and Atom feeds for meetup.com")
      (description "meetfree is a bottle web app that serves iCalendar
and Atom feeds for meetup.com groups.  meetfree fetches data from
meetup.com using its GraphQL API.  The GraphQL API does not require any
authentication.")
      (license license:unlicense))))

(define-record-type* <meetfree-configuration>
  meetfree-configuration make-meetfree-configuration
  meetfree-configuration?
  (python-meetfree meetfree-configuration-python-meetfree
                   (default python-meetfree))
  (server-name meetfree-configuration-server-name)
  (allowed-groups meetfree-configuration-allowed-groups
                  (default #f))) ; list of group slugs or #f

(define %meetfree-accounts
  (list (user-account
         (name "meetfree")
         (group "meetfree")
         (system? #t)
         (comment "meetfree user")
         (home-directory "/var/empty")
         (shell (file-append shadow "/sbin/nologin")))
        (user-group
         (name "meetfree")
         (system? #t))))

(define meetfree-gunicorn-apps
  (match-record-lambda <meetfree-configuration>
    (python-meetfree server-name allowed-groups)
    (list (gunicorn-app
           (name "meetfree")
           (package python-meetfree)
           (wsgi-app-module "meetfree:app")
           (user "meetfree")
           (group "meetfree")
           (environment-variables
            `(("SSL_CERT_FILE"
               . ,(file-append (profile
                                 (content (packages->manifest
                                           (list python python-meetfree))))
                               "/etc/ssl/certs/ca-certificates.crt"))
              ("MEETFREE_BASE_URL" . ,(string-append "https://" server-name))
              ,@(if allowed-groups
                    `(("MEETFREE_ALLOWED_GROUPS" . ,(string-join allowed-groups)))
                    '())))
           (extra-cli-arguments
            (list "--capture-output"))))))

(define meetfree-nginx-server-blocks
  (match-record-lambda <meetfree-configuration>
    (server-name)
    (list (nginx-server-configuration
           (server-name (list server-name))
           (locations
            (list (nginx-location-configuration
                   (uri "/")
                   (body
                    (list "proxy_pass http://unix:/var/run/gunicorn/meetfree/socket:;")))))))))

(define meetfree-service-type
  (service-type
   (name 'meetfree)
   (description "Run meetfree.")
   (extensions (list (service-extension account-service-type
                                        (const %meetfree-accounts))
                     (service-extension gunicorn-service-type
                                        meetfree-gunicorn-apps)
                     (service-extension forge-nginx-service-type
                                        meetfree-nginx-server-blocks)))))