Add +org-capture

1 files changed, 82 insertions, 0 deletions

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+;;; +org-capture.el -*- lexical-binding: t; -*-
+
+;;; Code:
+
+(require 'cl-lib)
+;; We don't require `org-capture' here because I'll have to require this library
+;; to init.el /before/ org-capture is fully needed.
+
+(defun +org-capture--get (key &optional list)
+  "Find KEY in LIST, or return nil.
+LIST defaults to `org-capture-templates'."
+  (alist-get key (or list org-capture-templates) nil nil #'equal))
+
+;; Set it up as a generic value.  Based on the one for `alist-get'.
+(gv-define-expander +org-capture--get
+  (lambda (do key &optional alist)
+    (setq alist (or alist org-capture-templates))
+    (macroexp-let2 macroexp-copyable-p k key
+      (gv-letplace (getter setter) alist
+        (macroexp-let2 nil p `(assoc ,k ,getter 'equal)
+          (funcall do `(cdr ,p)
+                   (lambda (v)
+                     (macroexp-let2 nil v v
+                       (let ((set-exp
+                              `(if ,p (setcdr ,p ,v)
+                                 ,(funcall setter
+                                           `(cons (setq ,p (cons ,k ,v))
+                                                  ,getter)))))
+                         `(progn
+                            ,set-exp
+                            ,v))))))))))
+
+(defun +org-capture-sort (&optional list)
+  "Sort LIST by string keys.
+LIST is a symbol and defaults to `org-capture-templates'."
+  (setq list (or list 'org-capture-templates))
+  (set list (sort (symbol-value list) (lambda (a b)
+                                        (string< (car a) (car b))))))
+
+;;;###autoload
+(defun +org-capture-templates-setf (key value &optional list sort-after)
+  "Add KEY to LIST, using `setf'.
+LIST is a symbol and defaults to `org-capture-templates' -- so
+this function sets values on a list that's structured as such.
+
+Thus, KEY is a string key.  If it's longer than one character,
+this function will search LIST for each successive run of
+characters before the final, ensuring sub-lists exist of the
+form (CHARS DESCRIPTION).
+
+For example, if KEY is \"abc\", first a LIST item of the form (a
+DESCRIPTION), if non-existant, will be added to the list (with a
+default description), then an item of the
+form (\"ab\" DESCRIPTION), before adding (KEY VALUE) to the LIST.
+
+VALUE is the template or group header required for
+`org-capture-templates', which see.
+
+SORT-AFTER, when set to t, will call
+`+org-capture-templates-sort' after setting, to ensure org can
+properly process the variable."
+  ;; LIST defaults to `org-capture-templates'
+  (declare (indent 2))
+  (unless list (setq list 'org-capture-templates))
+  ;; Ensure VALUE is a list to cons properly
+  (unless (listp value) (setq value (list value)))
+  (when (> (length key) 1)
+    ;; Check for existence of groups.
+    (let ((expected (cl-loop for i from 1 to (1- (length key))
+                             collect (substring key 0 i) into keys
+                             finally return keys)))
+      (cl-loop for ek in expected
+               if (not (+org-capture--get ek (symbol-value list))) do
+               (setf (+org-capture--get ek (symbol-value list))
+                     (list (format "(Group %s)" ek))))))
+  (prog1 ;; Set KEY to VALUE
+      (setf (+org-capture--get key (symbol-value list)) value)
+    ;; Sort after, maybe
+    (when sort-after (+org-capture-sort list))))
+
+(provide '+org-capture)
+;;; +org-capture.el ends here