add drops

drops.lisp

@@ -0,0 +1,32 @@
+(in-package :lispostory)
+
+(defparameter *chronostory-drops-sheet-url* "https://docs.google.com/spreadsheets/d/e/2PACX-1vRpKuZGJQIFFxSi6kzYx4ALI0MQborpLEkh3J1qIGSd0Bw7U4NYg5CK-3ESzyK580z4D8NO59SUeC3k/pub?gid=1888753114&single=true&output=csv")
+
+(defparameter *chronostory-drops* nil)
+
+(defun refresh-drops ()
+  (let* ((data (drakma:http-request *chronostory-drops-sheet-url*))
+         (csv (cl-csv:read-csv data))
+         (header (car csv))
+         (num-fields-to-keep (position "" header :test #'equal))
+         (keys (mapcar #'string-to-hash-table-key (subseq header 0 num-fields-to-keep)))
+         (drops (map 'vector
+                     (lambda (row)
+                       (serapeum:pairhash keys (subseq row 0 num-fields-to-keep)))
+                     (cdr csv))))
+    (setf *chronostory-drops* drops)
+    (alexandria-2:write-string-into-file
+     (shasht:write-json drops nil)
+     "drops.json"
+     :if-exists :overwrite
+     :if-does-not-exist :create)))
+
+(defun reload-drops ()
+  (let ((drops (shasht:read-json (uiop:read-file-string "drops.json"))))
+    (setf *chronostory-drops* drops)
+    drops))
+
+(defun load-drops ()
+  (if *chronostory-drops*
+      *chronostory-drops*
+      (reload-drops)))