From 3962ebb9bc68348992d442a414e75c46dd8fde0a Mon Sep 17 00:00:00 2001
From: Case Duckworth
Date: Wed, 5 Jan 2022 11:25:37 -0600
Subject: Improve +sunrise-sunset

TODO: At some point, I should break this into a standalone package.
---
 lisp/acdw.el | 34 +++++++++++++++++++++++++++-------
 1 file changed, 27 insertions(+), 7 deletions(-)

diff --git a/lisp/acdw.el b/lisp/acdw.el
index 47df30d..a1d3a0b 100644
--- a/lisp/acdw.el
+++ b/lisp/acdw.el
@@ -54,6 +54,18 @@ ARGS."
       (when msg
         (message "%s" msg)))))
 
+(defun +sunrise-sunset--encode (time)
+  "Encode diary-style time string into a time.
+This is stolen from `run-at-time'."
+  (let ((hhmm (diary-entry-time time))
+        (now (decode-time)))
+    (encode-time (list 0 (% hhmm 100) (/ hhmm 100)
+                       (decoded-time-day now)
+                       (decoded-time-month now)
+                       (decoded-time-year now)
+                       nil -1
+                       (decoded-time-zone now)))))
+
 (defun +sunrise-sunset (sunrise-command sunset-command &optional reset)
   "Run SUNRISE-COMMAND at sunrise, and SUNSET-COMMAND at sunset.
 With RESET, this function will call itself with its own
@@ -72,14 +84,22 @@ itself."
                           (* nonl)))
          (ss (+suppress-messages #'sunrise-sunset))
          (_m (string-match times-regex ss))
-         (sunrise-time (match-string 1 ss))
-         (sunset-time (match-string 2 ss)))
-    (run-at-time sunrise-time nil sunrise-command)
-    (run-at-time sunset-time nil sunset-command)
-    (run-at-time "12:00am" nil sunset-command)
+         (sunrise (match-string 1 ss))
+         (sunset (match-string 2 ss))
+         (sunrise-time (+sunrise-sunset--encode sunrise))
+         (sunset-time (+sunrise-sunset--encode sunset)))
+    (cond
+     ((time-less-p nil sunrise-time)
+      ;; If it isn't sunrise yet, it's still dark---and so we need to run the
+      ;; sunset-command.
+      (funcall sunset-command)
+      (run-at-time sunrise nil sunrise-command))
+     ((time-less-p nil sunset-time) (run-at-time sunset nil sunset-command))
+     (t (run-at-time "12:00am" nil sunset-command)))
     ;; Reset everything at midnight
-    (run-at-time "12:00am" (* 60 60 24)
-                 #'sunrise-sunset sunrise-command sunset-command t)))
+    (unless reset
+      (run-at-time "12:00am" (* 60 60 24)
+                 #'+sunrise-sunset sunrise-command sunset-command t))))
 
 (defun +ensure-after-init (function)
   "Ensure FUNCTION runs after init, or now if already initialized.
-- 
cgit 1.4.1-21-gabe81