From c4c87049805730f791a69a8a47702a13afe31c07 Mon Sep 17 00:00:00 2001
From: Arun Isaac
Date: Mon, 26 Aug 2019 13:43:55 +0530
Subject: Replace plist-put* by non-destructive ennu-plist-map-to-plist.

* ennu.el (plist-put*): Delete function.
(ennu-plist-map-to-plist): New function.
(ennu--post-metadata-memoized): Replace plist-put* by non-destructive
ennu-plist-map-to-plist.
---
 ennu.el | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/ennu.el b/ennu.el
index 7169b9a..76485a3 100644
--- a/ennu.el
+++ b/ennu.el
@@ -241,12 +241,15 @@ last form in BODY."
              (when (member link-type (list "image" "static" "video"))
                (cons link-type (org-element-property :path link))))))))))
 
-(defun plist-put* (plist &rest key-value-pairs)
-  (pcase key-value-pairs
-    (`(,key ,value)
-     (plist-put plist key value))
-    (`(,key ,value . ,tail)
-     (apply 'plist-put* (plist-put plist key value) tail))))
+(defun ennu-plist-map-to-plist (function plist)
+  "Apply FUNCTION to each key-value pair of PLIST and return the
+result as a plist with keys being the keys in PLIST and the
+values being the values returned by FUNCTION. FUNCTION is called
+with two arguments -- the key and the value."
+  (seq-mapcat
+   (pcase-lambda (`(,key ,value))
+     (list key (funcall function key value)))
+   (seq-partition plist 2)))
 
 (defun ennu-post-metadata (post)
   (ennu--post-metadata-memoized
@@ -261,11 +264,13 @@ last form in BODY."
                 (unless (plist-member metadata key)
                   (user-error "Metadata %s not specified" key)))
               ennu-mandatory-metadata)
-      (plist-put*
-       metadata
-       :title (funcall export (first (plist-get metadata :title)))
-       :date (org-timestamp-to-time (first (plist-get metadata :date)))
-       :author (funcall export (first (plist-get metadata :author)))))))
+      (ennu-plist-map-to-plist
+       (lambda (key value)
+         (pcase key
+           (:title (funcall export (first (plist-get metadata :title))))
+           (:date (org-timestamp-to-time (first (plist-get metadata :date))))
+           (:author (funcall export (first (plist-get metadata :author))))))
+       metadata))))
 
 (defvar ennu-mandatory-metadata
   (list :title :date))
-- 
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