From 991f2f44acc7e6f839d3b43225b2f35e32f6887a Mon Sep 17 00:00:00 2001
From: Grant Shangreaux <grant@unabridgedsoftware.com>
Date: Sun, 18 Dec 2022 20:11:32 -0600
Subject: Add: basic first implementation of creating playlist zips

---
 vampire.asd |  3 ++-
 zipper.lisp | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 1 deletion(-)
 create mode 100644 zipper.lisp

diff --git a/vampire.asd b/vampire.asd
index 2690ca3..ac49ea3 100644
--- a/vampire.asd
+++ b/vampire.asd
@@ -15,7 +15,8 @@
                #:derrida
                #:ironclad
                #:jonathan
-               #:swank)
+               #:swank
+	       #:zippy)
   :components ((:file "hunchentoot-handle-static-file")
                (:file "package")
                (:file "definition-macros")
diff --git a/zipper.lisp b/zipper.lisp
new file mode 100644
index 0000000..4d80f59
--- /dev/null
+++ b/zipper.lisp
@@ -0,0 +1,34 @@
+;;;; zipper.lisp
+
+(in-package :vampire)
+
+(defun clean-slashes (str)
+  (cl-ppcre:regex-replace-all "/" str "-"))
+
+(defun zip-playlist (playlist)
+  (let* ((tracks (zip-playlist-filenames playlist)) 
+	 (out (format nil "public/static/~a.zip" (clean-slashes (playlist-title playlist)))))
+    (org.shirakumo.zippy:compress-zip tracks out)))
+
+(defun zip-track-filename (track pos playlist)
+  (with-slots (artist album title codec) track
+    (format nil "~a/~2,'0d-~a-~a-~a.~a" (zip-playlist-dir playlist) pos
+	    (clean-slashes artist) (clean-slashes album) (clean-slashes title) codec)))
+
+(defun zip-playlist-dir (playlist)
+  (format nil "public/static/downloads/~a/" (clean-slashes (playlist-title playlist))))
+
+(defun zip-playlist-filenames (playlist)
+   (loop for track in (playlist-tracks playlist)
+	 for i from 1
+	 collect (zip-track-filename track i playlist)))
+
+(defun copy-audio-files-for-download (playlist)
+  (ensure-directories-exist #P"public/static/downloads/")
+  (let ((audio-files (mapcar #'track-file (playlist-tracks playlist)))
+	(dest-files (zip-playlist-filenames playlist))
+	(dest-dir (zip-playlist-dir playlist)))
+    (ensure-directories-exist dest-dir)
+    (loop for file in audio-files
+	  for dest in dest-files
+	  do (uiop:copy-file file (format nil "~a~a" dest-dir dest)))))
-- 
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