From 533d78358a064ffbc450af8b396050da60a5ac1d Mon Sep 17 00:00:00 2001
From: Ian12467 <ianochieng277@gmail.com>
Date: Sun, 26 Feb 2023 23:00:55 +0300
Subject: [PATCH] code:this is the codebase in haskell programming

---
 main.hs | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100755 main.hs

diff --git a/main.hs b/main.hs
new file mode 100755
index 0000000..384be3b
--- /dev/null
+++ b/main.hs
@@ -0,0 +1,40 @@
+import Data.Conduit
+import Data.Conduit.Ical
+import Data.Time
+import Data.Text (Text)
+import Data.Icalendar
+import Data.Icalendar.Types
+import Data.Icalendar.Printer
+import System.Cron
+
+-- Parse iCalendar data from each subscription
+getEvents :: [Text] -> IO [VEvent]
+getEvents urls = do
+    events <- forM urls $ \url -> do
+        runResourceT $ parseIcs url $$ sinkIcs
+    return $ concat events
+
+-- Generate a new iCalendar file with the combined events
+generateCalendar :: [VEvent] -> Text
+generateCalendar events =
+    let cal = Calendar [Version 2, ProdId "my-calendar"]
+                (map (\event -> Component "VEVENT" [event]) events)
+    in printIcs cal
+
+
+-- Define the cron expression for the schedule
+cronExpression = "0,30 * * * *" -- runs every 30 minutes
+
+-- Define the task that should be executed on the schedule
+task :: IO ()
+task = do
+    putStrLn "Updating calendar..."
+    events <- getEvents urls -- get events from subscriptions
+    let newCalendar = generateCalendar events -- generate new calendar
+    -- write new calendar to file
+    writeFile "calendar.ics" (unpack newCalendar)
+    putStrLn "Calendar updated!"
+
+-- Run the task on the schedule
+main :: IO ()
+main = withCron cronExpression task
\ No newline at end of file