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+;;; +notmuch.el --- Notmuch extras -*- lexical-binding: t; -*-
+
+;;; Commentary:
+
+;; This is stuff that I suppose /could/ go in notmuch/init.el, but ... doesn't.
+
+;;; Code:
+
+(require 'cl-lib)
+(require 'notmuch)
+
+(defvar +notmuch-send-dispatch-rules nil
+  "Alist of from addresses and variables to set when sending.")
+
+(defun +notmuch-query-concat (&rest queries)
+  "Concatenate notmuch queries."
+  (mapconcat #'identity queries " AND "))
+
+(defun +send-mail-dispatch ()
+  "Dispatch mail sender, depending on account."
+  (let ((from (message-fetch-field "from")))
+    (dolist (vars (cl-loop for (addr . vars) in +notmuch-send-dispatch-rules
+                           if (string-match-p addr from) return vars))
+      (set (car vars) (cdr vars)))))
+
+(defun +notmuch-correct-tags (args)
+  (list (car args) (mapcar #'string-trim (cadr args))))
+
+(defun +notmuch-goto (&optional prefix)
+  "Go straight to a `notmuch' search.
+Without PREFIX argument, go to the first one in
+`notmuch-saved-searches'; with a PREFIX argument, prompt the user
+for which saved search to go to; with a double PREFIX
+argument (\\[universal-argument] \\[universal-argument]), prompt
+for search."
+  (interactive "P")
+  (pcase prefix
+    ('nil (notmuch-search (plist-get (car notmuch-saved-searches) :query)))
+    ('(4) (notmuch-search (plist-get (cl-find (completing-read "Saved Search: "
+                                                               (mapcar (lambda (el)
+                                                                         (plist-get el :name))
+                                                                       notmuch-saved-searches))
+                                              notmuch-saved-searches
+                                              :key (lambda (el) (plist-get el :name))
+                                              :test #'equal)
+                                     :query)))
+    (_ (notmuch-search))))
+
+;; Don't add an initial input when completing addresses
+(eval-after notmuch
+  (cond ((featurep 'el-patch)
+         (el-patch-feature notmuch)
+         (el-patch-defun notmuch-address-selection-function (prompt collection initial-input)
+                         "Call (`completing-read'
+           PROMPT COLLECTION nil nil INITIAL-INPUT 'notmuch-address-history)"
+                         (completing-read
+                          prompt collection nil nil
+                          (el-patch-swap initial-input
+                                         nil)
+                          'notmuch-address-history)))
+        (:else
+         (defun notmuch-address-selection-function (prompt collection initial-input)
+                         "Call (`completing-read'
+           PROMPT COLLECTION nil nil INITIAL-INPUT 'notmuch-address-history)"
+                         (completing-read
+                          prompt collection nil nil nil
+                          'notmuch-address-history)))))
+
+(defcustom +notmuch-spam-tags '("+spam" "+Spam")
+  "A list of tag changes to apply when marking a thread as spam."
+  :type '(repeat string))
+
+(defun +notmuch-tree-mark-spam-then-next (&optional ham beg end)
+  "Mark the current message as spam and move to the next."
+  (interactive "P")
+  (+notmuch-tree-mark-spam ham)
+  (notmuch-tree-next-matching-message))
+
+(defun +notmuch-tree-mark-spam (&optional ham)
+  "Mark the current message as spam.
+That is, apply the tag changes in `+notmuch-spam-tags' to it.  If
+an optional prefix HAM argument is given, the message will be
+marked as not-spam (\"ham\"), i.e., the tag changes in
+`+notmuch-spam-tags' will be reversed."
+  (interactive "P")
+  (when +notmuch-spam-tags
+    (notmuch-tree-tag
+     (notmuch-tag-change-list +notmuch-spam-tags ham))))
+
+(defun +notmuch-search-mark-spam (&optional ham beg end)
+  "Mark the current thread or region as spam.
+This adds the tags in `+notmuch-spam-tags' to the message.  With
+an optional HAM prefix argument, mark the messages as
+not-spam (\"ham\").
+
+This function advances the next thread when finished."
+  (interactive (cons current-prefix-arg (notmuch-interactive-region)))
+  (when +notmuch-spam-tags
+    (notmuch-search-tag
+     (notmuch-tag-change-list +notmuch-spam-tags ham) beg end))
+  (when (eq beg end)
+    (notmuch-search-next-thread)))
+
+(provide '+notmuch)
+;;; +notmuch.el ends here