Split out mailinglist check base.

src/mailinglist.scm

@@ -0,0 +1,63 @@
+;;
+;; mailinglist.scm
+;;
+;; Common high-level mailinglist management procedures.
+;;
+;; ISC License
+;;
+;; Copyright 2023 Brmlab, z.s.
+;; Dominik Pantůček <dominik.pantucek@trustica.cz>
+;;
+;; Permission to use, copy, modify, and/or distribute this software
+;; for any purpose with or without fee is hereby granted, provided
+;; that the above copyright notice and this permission notice appear
+;; in all copies.
+;; 
+;; THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+;; WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+;; WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+;; AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
+;; CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+;; OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+;; NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+;; CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+;;
+
+(declare (unit mailinglist))
+
+(module
+ mailinglist
+ (
+  check-mailing-list
+  )
+
+ (import scheme
+	 (chicken base)
+	 (chicken format)
+	 racket-kwargs
+	 mailman
+	 mbase
+	 util-string)
+
+ (define* (check-mailing-list MB mls name #:pred? (pred? #f) #:suspended (suspended #f))
+   (define ml (find-mailman-list mls name))
+   (when ml
+     (let-values (((missing surplus)
+		   (mailman-compare-members ml
+					    (mbase-active-emails MB
+								 #:suspended suspended
+								 #:pred? pred?
+								 ))))
+       (if (null? (cdr ml))
+	   (print "Skipping ML check - not loaded")
+	   (if (and (null? missing)
+		    (null? surplus))
+	       (print (format "~a mailing list membership in sync." (string-capitalize name)))
+	       (let ()
+		 (print (format "~a mailing list:" (string-capitalize name)))
+		 (when (not (null? missing))
+		   (print "  Missing: " missing))
+		 (when (not (null? surplus))
+		   (print "  Outsiders: " surplus))))))))
+
+ )