From 3dc6cc287227bdfc218e79ea4753b601689eff2a Mon Sep 17 00:00:00 2001
From: Alban Gruin
Date: Fri, 11 Sep 2020 23:39:47 +0200
Subject: ics: clean Event module, conversion to string

Signed-off-by: Alban Gruin <alban@pa1ch.fr>
---
 src/ics.ml | 49 ++++++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 42 insertions(+), 7 deletions(-)

(limited to 'src/ics.ml')

diff --git a/src/ics.ml b/src/ics.ml
index 5bfecb0..2ee0269 100644
--- a/src/ics.ml
+++ b/src/ics.ml
@@ -17,10 +17,45 @@
 
 open CalendarLib
 
-type event = {
-    start: Calendar.t;
-    stop: Calendar.t;
-    summary: string;
-    category: string;
-    location: string
-  }
+let to_date = Printer.Calendar.sprint "%Y%m%dT%H%M%SZ"
+let current_date () = to_date @@ Calendar.now ()
+
+module Event = struct
+  type t = {
+      start: Calendar.t;
+      stop: Calendar.t;
+      summary: string;
+      location: string;
+    }
+
+  let make start stop summary location =
+    {start; stop; summary; location}
+
+  let to_string date event id =
+    Printf.sprintf "BEGIN:VEVENT\n\
+                    UID:%s.%d@ucs.pa1ch.fr\n\
+                    DTSTART:%s\n\
+                    DTEND:%s\n\
+                    DTSTAMP:%s\n\
+                    SUMMARY:%s\n\
+                    LOCATION:%s\n\
+                    END:VEVENT\n"
+      date id (to_date event.start) (to_date event.stop)
+      date event.summary event.location
+end
+
+type t = Event.t list
+
+let make (events: t) = events
+
+let to_string events =
+  let date = current_date () in
+  let rec gen_events id str = function
+    | [] -> str
+    | event :: l ->
+       gen_events (id + 1) (str ^ Event.to_string date event id) l in
+  "BEGIN:VCALENDAR\n\
+   VERSION:2.0\n\
+   PRODID:-//ucs//\n"
+  ^ gen_events 0 "" events
+  ^ "END:VCALENDAR\n"
-- 
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