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;;; tissue --- Text based issue tracker
;;; Copyright © 2022, 2023 Arun Isaac <arunisaac@systemreboot.net>
;;;
;;; This file is part of tissue.
;;;
;;; tissue is free software: you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation, either version 3 of the License, or
;;; (at your option) any later version.
;;;
;;; tissue 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
;;; General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with tissue. If not, see <https://www.gnu.org/licenses/>.
(define-module (tissue web dev)
#:use-module (rnrs io ports)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (ice-9 filesystem)
#:use-module (web request)
#:use-module (web response)
#:use-module (web server)
#:use-module (web uri)
#:use-module (xapian xapian)
#:use-module (tissue tissue)
#:use-module (tissue utils)
#:use-module (tissue web server)
#:use-module (tissue web static)
#:export (start-dev-web-server))
(define (handler request body xapian-index project-thunk)
"Handle web @var{request} with @var{body} and return two values---the
response headers and body. See @code{start-dev-web-server} for
documentation of @var{xapian-index} and @var{project-thunk}."
;; The project configuration could have changed between requests and
;; we want to read the latest configuration on each request. So, we
;; require a thunk that loads the project configuration, rather than
;; the project configuration itself.
(let ((project (project-thunk))
(path (uri-path (request-uri request))))
(log-request request)
(cond
;; Files
((any (lambda (web-file)
(cond
((find (cut string=?
(string-append "/" (file-name web-file))
<>)
(try-paths path))
=> (cut file <> (file-writer web-file)))
(else #f)))
(tissue-configuration-web-files project))
=> (lambda (file)
(values `((content-type . ,(mime-type-for-extension
(file-name-extension (file-name file)))))
(call-with-values open-bytevector-output-port
(lambda (port get-bytevector)
((file-writer file) port)
(get-bytevector))))))
;; Search page. We look for the search page only after files
;; because we want to let files shadow the search page if
;; necessary.
((member path (list "/" "/search"))
(search-handler request body xapian-index project))
;; Not found
(else
(404-response request)))))
(define (start-dev-web-server port xapian-index project-thunk)
"Start development web server listening on
@var{port}. @var{xapian-index} is the path to the Xapian index to
search in. @var{project} is a thunk that returns a
@code{<tissue-configuration>} object describing the project."
(format (current-error-port)
"Tissue development web server listening at http://localhost:~a~%" port)
;; Explicitly dereference the module and handler variable each time
;; so as to support live hacking.
(run-server (cut (module-ref (resolve-module '(tissue web dev))
'handler)
<> <> xapian-index project-thunk)
'http
(list #:port port)))
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