From 5f74d40fa736745651514853afdca3ed44e5ae74 Mon Sep 17 00:00:00 2001
From: Joel Kronqvist <work.joelkronqvist@gmail.com>
Date: Thu, 3 Nov 2022 17:15:40 +0200
Subject: Made server update foods at monday morning instead of updating them
 just randomly once a week.

---
 Functions/dateFuncs.js | 26 ++++++++++++++++++++++++--
 food.js                |  2 ++
 server.js              | 14 +++-----------
 update.js              |  2 ++
 4 files changed, 31 insertions(+), 13 deletions(-)

diff --git a/Functions/dateFuncs.js b/Functions/dateFuncs.js
index 9b1237a..55a9372 100644
--- a/Functions/dateFuncs.js
+++ b/Functions/dateFuncs.js
@@ -35,8 +35,30 @@ function weekdayToNumber(s)
 	}
 }
 
+
+function run_at_monday_mornings(func) {
+	const ms_in_h = 60/*min*/ * 60/*s*/ * 1000/*ms*/;
+
+	const d = new Date();
+	const hour = d.getHours(); // eg. fri 17:20 -> 17
+	const weekday = d.getDay() || 7; // 1 = monday, 7 = sunday
+
+	days_to_elapse = 8 - weekday;
+	ms_to_elapse = ms_in_h * (
+		days_to_elapse * 24/*hours in a day*/
+		- hour // removes unneccessary hours so that we update it at 0 am
+	) + 1 /*+1 so that we know that it won't be exactly midnight
+	and possibly sunday. idk if this actually is needed.*/;
+
+	setTimeout(() => run_at_monday_mornings(func), ms_to_elapse);
+
+	if (weekday === 1)
+		func();
+}
+
 module.exports = {
     fromString: stringToDate,
     between: isBetweenDates,
-    weekdayToNumber: weekdayToNumber
-}
\ No newline at end of file
+    weekdayToNumber: weekdayToNumber,
+    run_at_monday_mornings: run_at_monday_mornings
+}
diff --git a/food.js b/food.js
index 4b9ef74..7a9691d 100644
--- a/food.js
+++ b/food.js
@@ -48,6 +48,8 @@ async function buildFoods(DB)
 		}
 	}
 	await Promise.all(foodInitOperations);
+	console.log("Foods updated.")
+	return 0;
 }
 
 function getFoodLink(week)
diff --git a/server.js b/server.js
index 66f5b19..c496b14 100644
--- a/server.js
+++ b/server.js
@@ -49,18 +49,10 @@ async function init()
 	// Update...
 	// ...shifts and classes
 	await updateDB.update(SQLDB, "../Updation/shifts.txt", "../Updation/vanhalops.csv", "../Updation/uusilops.csv");
-	console.log("Shifts and classes updated.");
 	// ...foods
-	await food.build(SQLDB);
-	setInterval(
-		() =>
-		{
-			food.build(SQLDB);
-		},
-		7 * 24 * 60 * 60 * 1000
-	);
-	console.log("Foods updated.")
-
+	run_at_monday_mornings(() => food.build(SQLDB));
+	if ((new Date()).getDay() !== 1) // update if it's not monday. if it's monday, it has already been run by the scheduler above.
+		await food.build(SQLDB);
 	// server code
 	async function server(req, res)
 	{
diff --git a/update.js b/update.js
index c946304..9a0c027 100644
--- a/update.js
+++ b/update.js
@@ -9,7 +9,9 @@ async function buildDB(dbconnection, shiftPath, ...classfiles)
 	shiftCont = shiftCont.toString("utf-8").replaceAll("\r", ""); // \r because of the \r\n newline on windows which may create problems
 
 	await parseClasses(dbconnection, ...classfiles),
+	console.log("Classes updated.");
 	await parse.build(shiftCont, dbconnection)
+	console.log("Shifts updated.");
 	return 0;
 }
 
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