From 770bc6cf967fc779775ccadc49fa4347859185a3 Mon Sep 17 00:00:00 2001
From: Florian Fischer <florian.fischer@muhq.space>
Date: Mon, 25 Mar 2024 16:04:31 +0100
Subject: improve tile connection detection

---
 go/game/map.go | 39 +++++++++++++--------------------------
 1 file changed, 13 insertions(+), 26 deletions(-)

diff --git a/go/game/map.go b/go/game/map.go
index 5ed1335e..378e9f2c 100644
--- a/go/game/map.go
+++ b/go/game/map.go
@@ -140,52 +140,39 @@ func (m *Map) FindNeighbours(x, y int) (left, right, above, below *Tile) {
 	return left, right, above, below
 }
 
-func (m *Map) FindAnyConnections(x, y int) (connections int, left, right, above, below bool) {
+func (m *Map) FindConnections(x, y int, isConnection func(TileType) bool) (connections int, left, right, above, below bool) {
 	leftT, rightT, aboveT, belowT := m.FindNeighbours(x, y)
 	connections = 0
 
-	if leftT != nil && leftT.Type != TileTypes.Neutral {
+	if leftT != nil && isConnection(leftT.Type) {
 		left = true
 		connections += 1
 	}
-	if rightT != nil && rightT.Type != TileTypes.Neutral {
+	if rightT != nil && isConnection(rightT.Type) {
 		right = true
 		connections += 1
 	}
-	if aboveT != nil && aboveT.Type != TileTypes.Neutral {
+	if aboveT != nil && isConnection(aboveT.Type) {
 		above = true
 		connections += 1
 	}
-	if belowT != nil && belowT.Type != TileTypes.Neutral {
+	if belowT != nil && isConnection(belowT.Type) {
 		below = true
 		connections += 1
 	}
-
 	return
 }
 
-func (m *Map) FindStreetConnections(x int, y int) (connections int, left, right, above, below bool) {
-	leftT, rightT, aboveT, belowT := m.FindNeighbours(x, y)
-	connections = 0
+func (m *Map) FindAnyConnections(x, y int) (connections int, left, right, above, below bool) {
+	return m.FindConnections(x, y, func(t TileType) bool { return t != TileTypes.Neutral })
+}
 
-	if leftT != nil && leftT.Type == TileTypes.Street {
-		left = true
-		connections += 1
-	}
-	if rightT != nil && rightT.Type == TileTypes.Street {
-		right = true
-		connections += 1
-	}
-	if aboveT != nil && aboveT.Type == TileTypes.Street {
-		above = true
-		connections += 1
-	}
-	if belowT != nil && belowT.Type == TileTypes.Street {
-		below = true
-		connections += 1
-	}
+func (m *Map) FindStreetConnections(x int, y int) (connections int, left, right, above, below bool) {
+	return m.FindConnections(x, y, func(t TileType) bool { return t == TileTypes.Street })
+}
 
-	return
+func (m *Map) FindFortificationConnections(x int, y int) (connections int, left, right, above, below bool) {
+	return m.FindConnections(x, y, func(t TileType) bool { return t.IsFortification() })
 }
 
 func GetMap(name string) (*Map, error) {
-- 
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