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mu-scm: add full-message support (body/header)

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Implement support for "header" and "body" procedures, with require loading the
message file from disk, and create a foreign object for the message.

We keep those alive in a vector, and hook up a finalizer.

Update docs & tests as well.
This commit is contained in:
Dirk-Jan C. Binnema
2025-06-21 11:53:18 +03:00
parent 812d78be49
commit ca46c09ccb
11 changed files with 303 additions and 124 deletions
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46
scm/mu-scm.scm
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@ -68,6 +68,10 @@
cc
bcc
;; message-body
body
header
;; misc
options
@ -120,14 +124,30 @@ If not found, return #f."
;; Message
;;
;; A <message> is created from a message plist.
;; A <message> has two slots:
;; plist --> this is the message sexp cached in the database;
;; for each message (for mu4e, but we reuse here)
;; object--> wraps a Mu::Message* as a "foreign object"
;;
;; generally the plist is a bit cheaper, since the mu-message
;; captures a file-deescriptor.
;; In mu, we have store a plist sexp for each message in the database,
;; for use with mu4e. But, that very plist is useful here as well.
(define-class <message> ()
(plist #:init-keyword #:plist #:getter plist))
(plist #:init-value #f #:init-keyword #:plist)
(object #:init-value #f #:init-keyword #:object))
;; using the plist as-is makes for O(n) access to the various fields
(define-method (plist (message <message>))
"Get the PLIST for this MESSAGE."
(slot-ref message 'plist))
(define-method (object (message <message>))
"Get the foreign object for this MESSAGE.
If MESSAGE does not have such an object yet, crate it from the
path of the message."
(if (not (slot-ref message 'object))
(slot-set! message 'object
(message-object-make (path message))))
(slot-ref message 'object))
(define-method (find-field (message <message>) field)
(plist-find (plist message) field))
@ -200,7 +220,7 @@ Return #f otherwise."
(find-field message ':flags))
(define-method (flag? (message <message>) flag)
"Does MESSAGE have FLAG?."
"Does MESSAGE have FLAG?"
(let ((flags
(find-field message ':flags)))
(if flags
@ -289,6 +309,18 @@ not found."
#f if not found."
(find-contact-field message ':bcc))
(define* (body message #:key (html? #f))
"Get the MESSAGE body or #f if not found.
If #:html is non-#f, instead search for the HTML body.
Requires the full message."
(message-body (object message) html?))
(define-method (header (message <message>) (field <string>))
"Get the raw MESSAGE header FIELD or #f if not found.
FIELD is case-insensitive and should not have the ':' suffix.
Requires the full message."
(message-header (object message) field))
;; Store
;;
;; Note: we have a %default-store, which is the store we opened during
@ -322,7 +354,7 @@ not found."
(max-results #f))
"Find messages matching some query.
The query is mandatory, the other (keyword) arguments are optional.
The query is mandatory, the other (keyword) arguments are optional.
(mfind QUERY
#:store %default-store. Leave at default.
#:related? include related messages? Default: false