From 0dd44372e806bf88eb738effe080e2dade846ff2 Mon Sep 17 00:00:00 2001
From: Adrien <me@adrien.run>
Date: Thu, 9 Feb 2023 21:27:47 +0100
Subject: [PATCH] =?UTF-8?q?=E2=99=BB=EF=B8=8F=20Don=C2=B4t=20overwrite=20s?=
 =?UTF-8?q?tore.passages=20structure=20during=20its=20update=20by=20the=20?=
 =?UTF-8?q?addPassage=20method?=
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---
 frontend/src/businessData.tsx | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/frontend/src/businessData.tsx b/frontend/src/businessData.tsx
index 4383022..c2e2388 100644
--- a/frontend/src/businessData.tsx
+++ b/frontend/src/businessData.tsx
@@ -61,7 +61,20 @@ export function BusinessDataProvider(props: { children: JSX.Element }) {
 	}
 
 	const addPassages = (passages: Passages): void => {
-		setStore('passages', passages);
+		const storePassages = store.passages;
+		for (const lineId of Object.keys(passages)) {
+			const newLinePassages = passages[lineId];
+			const linePassages = storePassages[lineId];
+			if (linePassages === undefined) {
+				setStore('passages', lineId, newLinePassages);
+			}
+			else {
+				for (const destination of Object.keys(newLinePassages)) {
+					const newLinePassagesDestination = newLinePassages[destination];
+					setStore('passages', lineId, destination, newLinePassagesDestination);
+				}
+			}
+		}
 	}
 
 	const clearPassages = (): void => {