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;;; mumi -- Mediocre, uh, mail interface
;;; Copyright © 2016-2022 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2022 Arun Isaac <arunisaac@systemreboot.net>
;;;
;;; 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
;;; <http://www.gnu.org/licenses/>.
(define-module (mumi web controller)
#:use-module (ice-9 match)
#:use-module (ice-9 format)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (web request)
#:use-module (web uri)
#:use-module (webutils sessions)
#:use-module (gcrypt base64)
#:use-module (gcrypt mac)
#:use-module (mumi config)
#:use-module ((mumi debbugs)
#:select (bug-status bug-archived bug-subject bug-done))
#:use-module (mumi jobs)
#:use-module (mumi messages)
#:use-module (mumi web render)
#:use-module (mumi web download)
#:use-module (mumi web graphql)
#:use-module (mumi web util)
#:use-module (mumi web view html)
#:use-module ((mumi xapian) #:select (search))
#:export (controller))
(define-syntax-rule (-> target functions ...)
(fold (lambda (f val) (and=> val f))
target
(list functions ...)))
(define (%session-manager)
(let ((key-file (string-append (%config 'key-dir) "/signing-key")))
(unless (file-exists? key-file)
(with-output-to-file key-file
(lambda () (write (base64-encode (generate-signing-key))))))
(make-session-manager
(with-input-from-file key-file read)
;; expire session after 30 mins
#:expire-delta '(0 0 30))))
(define (controller request body)
(match-lambda
(('GET)
(render-html (index)
#:extra-headers
'((cache-control . ((max-age . 60))))))
(('GET "easy")
(render-html (list-of-matching-bugs "tag:easy" (easy-bugs))))
(('GET "recent")
(render-html (list-of-recent-issues)))
(('GET "forgotten")
(render-html (list-of-forgotten-issues)))
(('GET "wishlist")
(render-html
(list-of-matching-bugs "severity:wishlist is:open"
(bugs-by-severity "wishlist" "open"))))
(((or 'GET 'POST) "graphql")
(handle-graphql request body))
(('GET "search")
(let ((query (-> request
request-uri
uri-query
parse-query-string
(cut assoc-ref <> "query"))))
(cond
;; TODO: query should not be empty!
((or (not query)
(string-null? (string-trim query)))
(redirect '()))
;; For convenience
((string-prefix? "id:" query) =>
(lambda _ (redirect (list "issue" (string-drop query (string-length "id:"))))))
((string-prefix? "#" query) =>
(lambda _ (redirect (list "issue" (string-drop query (string-length "#"))))))
((string->number query) =>
(lambda _ (redirect (list "issue" query))))
;; Search for matching messages and return list of bug reports
;; that belong to them.
(else
(render-html
(list-of-matching-bugs query
(search-bugs (string-join
(process-query query)))))))))
((or ('GET "issue" (? string->number id))
('GET (? string->number id)))
(let ((bug (bug-status id))
(message (match (uri-query (request-uri request))
("comment-ok"
'(info . "Your comment has been submitted!"))
("comment-error"
'(error . "There was an error submitting your comment!"))
(_ #f))))
(if bug
;; Record the current issue id in an encrypted cookie.
;; This will be verified when posting a comment.
(let* ((cookie-header
(set-session (%session-manager) `((issue-id . ,id))))
(headers
(cond
((bug-archived bug)
;; Tell browser to cache this for 12 hours.
(cons cookie-header
'((cache-control . ((max-age . 43200))))))
((bug-done bug)
;; Tell browser to cache this for 1 hour.
(cons cookie-header
'((cache-control . ((max-age . 3600))))))
(else (list cookie-header))))
(page (issue-page bug message)))
(if page
(render-html page #:extra-headers headers)
(render-html (unknown id))))
(render-html (unknown id)))))
(('GET "msgid" msgid)
(match (search (format #false "msgid:~a" (string-hash msgid)))
((id . rest)
(redirect (list "issue" id)))
(_ (render-html (unknown msgid)))))
(('POST "issue" (? string->number id) "comment")
(if (mailer-enabled?)
(let ((headers (request-headers request))
(form-data (parse-form-submission request body))
(cookie (or (session-data (%session-manager) request)
'()))
(bug (bug-status id)))
(if (and
bug
;; The encrypted cookie must be fresh and contain the
;; current issue id.
(and=> (assoc-ref cookie 'issue-id)
(cut string=? id <>))
;; The honeypot field "validation" must remain empty
(let ((val (assoc-ref form-data 'validation)))
(and val (string-null? (string-trim-both val))))
;; Submission may not have happened too quickly
(let ((time (assoc-ref form-data 'timestamp)))
(and time (reasonable-timestamp? time)))
;; Message must not be too short
(and=> (assoc-ref form-data 'text)
(lambda (text)
(> (string-length (string-trim-both text)) 10)))
;; Message must have sender
(and=> (assoc-ref form-data 'from)
(compose (negate string-null?) string-trim-both)))
(begin
;; Send comment to list
(enqueue 'mail
`((from . ,(string-trim-both (assoc-ref form-data 'from)))
(subject . ,(bug-subject bug))
(to . ,(format #f "~a@~a"
id (%config 'debbugs-domain)))
(text . ,(assoc-ref form-data 'text))))
(redirect (list "issue" id) "comment-ok"))
(redirect (list "issue" id) "comment-error")))
(redirect (list "issue" id) "comment-error")))
(('GET "issue" (? string->number id)
"attachment" (? string->number msg-num)
(? string->number path) ...)
(handle-download (string->number id)
(string->number msg-num)
(map string->number path)))
(('GET "issue" (? string->number id)
"patch-set" . patch-set-num)
(let* ((patch-set-num* (match patch-set-num
(() #false)
((f . rest) f)))
(content (patch-messages id patch-set-num*)))
(if content
(list `((content-type text)
(content-disposition
text/plain
(filename
. ,(format #f "~a-patch-set~:[-~a~;~].mbox"
id patch-set-num* patch-set-num*))))
content)
(not-found (request-uri request)))))
(('GET "issue" (? string->number id)
"raw" (? string->number msg-num))
(download-raw (string->number id)
(string->number msg-num)))
(('GET "issue" not-an-id)
(render-html (unknown not-an-id)))
(('GET "help")
(render-html (help)
;; Cache for 24 hours.
#:extra-headers
'((cache-control . ((max-age . 86400))))))
(('GET path ...)
(render-static-asset request))))
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