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(define-module (email-key-rotation state)
#:use-module (ice-9 exceptions)
#:use-module (ice-9 match)
#:use-module (oop goops)
#:re-export (make)
#:export (<email-key-rotation-state>
private-key-file
selectors
current-dkim-selector
current-dkim-private-key
expired-dkim-private-key
set-private-key-file
set-selectors
set-current-dkim-selector
set-current-dkim-private-key
set-expired-dkim-private-key
the-email-key-rotation-state)
#:declarative? #t
#:duplicates (merge-generics))
(define-class <email-key-rotation-state> ()
(private-key-file #:init-keyword #:private-key-file)
(selectors #:init-keyword #:selectors)
(current-dkim-selector #:init-keyword #:current-dkim-selector)
(current-dkim-private-key #:init-keyword #:current-dkim-private-key)
(expired-dkim-private-key #:init-keyword #:expired-dkim-private-key
#:init-value #f))
(define-method (private-key-file (s <email-key-rotation-state>))
(slot-ref s 'private-key-file))
(define-method (selectors (s <email-key-rotation-state>))
(slot-ref s 'selectors))
(define-method (current-dkim-selector (s <email-key-rotation-state>))
(slot-ref s 'current-dkim-selector))
(define-method (current-dkim-private-key (s <email-key-rotation-state>))
(slot-ref s 'current-dkim-private-key))
(define-method (expired-dkim-private-key (s <email-key-rotation-state>))
(slot-ref s 'expired-dkim-private-key))
(define-method (set-private-key-file (s <email-key-rotation-state>) filename)
(let ((ret (shallow-clone s)))
(slot-set! ret 'private-key-file filename)
ret))
(define-method (set-selectors (s <email-key-rotation-state>) selectors)
(let ((ret (shallow-clone s)))
(slot-set! ret 'selectors selectors)
ret))
(define-method (set-current-dkim-selector (s <email-key-rotation-state>) selector)
(let ((ret (shallow-clone s)))
(slot-set! ret 'current-dkim-selector selector)
ret))
(define-method (set-expired-dkim-private-key (s <email-key-rotation-state>) private-key)
(let ((ret (shallow-clone s)))
(slot-set! ret 'expired-dkim-private-key private-key)
ret))
(define-method (the-email-key-rotation-state (s <email-key-rotation-state>))
(with-exception-handler
(lambda (exn)
(raise-exception
(make-exception
(make-error)
(make-exception-with-origin 'the-email-key-rotation-state)
(make-exception-with-irritants (list s))
(make-exception-with-message
(format #f "the email key rotation state is invalid."))
exn)))
(lambda ()
(unless (slot-bound? s 'private-key-file)
(raise-exception
(make-exception
(make-error)
(make-exception-with-message
(format #f "the private key file name is not bound.")))))
(unless (string? (private-key-file s))
(raise-exception
(make-exception
(make-error)
(make-exception-with-irritants (list (private-key-file s)))
(make-exception-with-message
(format #f "the private key file name is not a string.")))))
(unless (list? (selectors s))
(raise-exception
(make-exception
(make-error)
(make-exception-with-irritants (list (selectors s)))
(make-exception-with-message
(format #f "the collection of selectors is not a list.")))))
(when (null? (selectors s))
(raise-exception
(make-exception
(make-error)
(make-exception-with-message
(format #f "the list of selectors is empty.")))))
(when (null? (cdr (selectors s)))
(raise-exception
(make-exception
(make-error)
(make-exception-with-message
(format #f "the list of selectors has only 1 item, cannot rotate anything with that.")))))
(let check ((sel (selectors s))
(i 0))
(match sel
(() #t)
(((? symbol? _) sel ...)
(check sel (+ i 1)))
((not-a-symbol _ ...)
(raise-exception
(make-exception
(make-error)
(make-exception-with-irritants (list i not-a-symbol))
(make-exception-with-message
(format #f "at least one item of the list of selectors is not a symbol (first: ~a is ~s)."
i not-a-symbol)))))))
(unless (symbol? (current-dkim-selector s))
(raise-exception
(make-exception
(make-error)
(make-exception-with-irritants (list (current-dkim-selector s)))
(make-exception-with-message
(format #f "the current DKIM selector is not a symbol (~s)."
(current-dkim-selector s))))))
(unless (memq (current-dkim-selector s)
(selectors s))
(raise-exception
(make-exception
(make-error)
(make-exception-with-irritants (list (current-dkim-selector s)
(selectors s)))
(make-exception-with-message
(format #f "the current DKIM selector ~s is not part of the list of selectors ~s."
(current-dkim-selector s)
(selectors s))))))
(unless (string? (current-dkim-private-key s))
(raise-exception
(make-exception
(make-error)
(make-exception-with-irritants (list (current-dkim-private-key s)))
(make-exception-with-message
(format #f "the current DKIM private key is not a string.")))))
(unless (or (not (expired-dkim-private-key s))
(string? (expired-dkim-private-key s)))
(raise-exception
(make-exception
(make-error)
(make-exception-with-irritants (list (current-dkim-private-key s)))
(make-exception-with-message
(format #f "the expired DKIM private key is set, but not a string.")))))))
s)
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