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name: emacs/notmuch-query.el 	 # note: path name is non-authoritative(*)

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; notmuch.el --- run notmuch within emacs
;
; Copyright © David Bremner
;
; This file is part of Notmuch.
;
; Notmuch 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.
;
; Notmuch 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 Notmuch.  If not, see <http://www.gnu.org/licenses/>.
;
; Authors: David Bremner <david@tethera.net>

(require 'json)

(defun notmuch-query-get-threads (search-terms &rest options)
  "Return a list of threads of messages matching SEARCH-TERMS.

A thread is a forest or list of trees. A tree is a two element
list where the first element is a message, and the second element
is a possibly empty forest of replies.
"
  (let  ((args (append '("show" "--format=json") search-terms))
	 (json-object-type 'plist)
	 (json-array-type 'list)
	 (json-false 'nil))
    (with-temp-buffer
      (progn
	(apply 'call-process (append (list notmuch-command nil t nil) args))
	(goto-char (point-min))
	(json-read)))))

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Mapping functions across collections of messages.

(defun notmuch-query-map-aux  (mapper function seq)
  "private function to do the actual mapping and flattening"

  (apply 'append
	 (mapcar
	   (lambda (tree)
	     (funcall mapper fn tree))
	   seq)))


(defun notmuch-query-map-threads (fn threads)
  "apply FN to every thread in  THREADS. Flatten results to a list.

See the function notmuch-query-get-threads for more information."

  (notmuch-query-map-aux 'notmuch-query-map-forest fn threads))


(defun notmuch-query-map-forest (fn forest)
  "apply function to every message in a forest. Flatten results to a list.

See the function notmuch-query-get-threads for more information.
"

  (notmuch-query-map-aux 'notmuch-query-map-tree fn forest))


(defun notmuch-query-map-tree (fn tree)
  "Apply function FN to every message in TREE. Flatten results to a list

See the function notmuch-query-get-threads for more information."

  (cons (funcall fn (car tree)) (notmuch-query-map-forest fn (cadr tree))))


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Predefined queries

(defun notmuch-query-get-message-ids (&rest search-terms)
  "Return a list of message-ids of messages that match SEARCH-TERMS"

  (notmuch-query-map-threads
   (lambda (msg) (plist-get msg :id))
   (notmuch-query-get-threads search-terms)))

(provide 'notmuch-query)

debug log:

solving 86230ba ...
found 86230ba in https://yhetil.org/notmuch/1267015920-8999-1-git-send-email-david@tethera.net/

applying [1/1] https://yhetil.org/notmuch/1267015920-8999-1-git-send-email-david@tethera.net/
diff --git a/emacs/notmuch-query.el b/emacs/notmuch-query.el
new file mode 100644
index 0000000..86230ba

Checking patch emacs/notmuch-query.el...
Applied patch emacs/notmuch-query.el cleanly.

index at:
100644 86230ba4913908557f7e3559ab1ecca487230066	emacs/notmuch-query.el

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    Blobs themselves have no identifier aside from the hash of its contents.^

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