feat: split the concept of hidden and impassable exits. add player_flag for discovered hidden exits.

1 files changed, 37 insertions, 8 deletions

diff --git a/internal/game/render_map.go b/internal/game/render_map.go
index 1bc9adc..5e57bc7 100644
--- a/internal/game/render_map.go
+++ b/internal/game/render_map.go
@@ -6,6 +6,7 @@ import (
 
 	"thehouseoficarus/internal/color"
 	"thehouseoficarus/internal/net"
+	"thehouseoficarus/internal/player"
 	"thehouseoficarus/internal/world"
 )
 
@@ -55,10 +56,26 @@ type mapGraph struct {
 // player's z-plane is constant.
 const playerZ = 0
 
-func buildGraph(g *Game, startRoomID int) *mapGraph {
+func buildGraph(g *Game, sess *net.Session, startRoomID int) *mapGraph {
 	rg := world.BuildGrid(startRoomID, func(id int) (*world.Room, bool) {
 		return loadRoom(g, id)
-	}, nil, nil)
+	}, nil, func(fromID int, dir world.ExitDir, targetID int) bool {
+		if sess == nil || sess.Player == nil {
+			return true
+		}
+		room, ok := loadRoom(g, fromID)
+		if !ok {
+			return true
+		}
+		exit, ok := room.Exits[dir]
+		if !ok || exit.Room != targetID {
+			return true
+		}
+		if exit.Hidden && !g.exitDiscovered(sess.Player, fromID, dir) {
+			return false
+		}
+		return true
+	}, nil)
 	return &mapGraph{posToRoom: rg.RoomAt, dist: rg.Dist}
 }
 
@@ -88,7 +105,7 @@ func renderMapCells(grid [][]mapCell, colorMode string, startRow, endRow int, bo
 
 func buildTinyMap(g *Game, sess *net.Session, roomID int, mg mapGlyphs) []string {
 	visited := roomsVisited(sess)
-	bg := buildGraph(g, roomID)
+	bg := buildGraph(g, sess, roomID)
 
 	colorMode := colorModeFor(sess)
 	atSpec := resolveMapAt(g, sess)
@@ -261,7 +278,7 @@ func buildTinyMap(g *Game, sess *net.Session, roomID int, mg mapGlyphs) []string
 
 func buildFullMap(g *Game, sess *net.Session, roomID, mapWidth, mapHeight int, mg mapGlyphs) []string {
 	visited := roomsVisited(sess)
-	bg := buildGraph(g, roomID)
+	bg := buildGraph(g, sess, roomID)
 
 	colorMode := colorModeFor(sess)
 	atSpec := resolveMapAt(g, sess)
@@ -602,10 +619,15 @@ func exitStateTo(g *Game, sess *net.Session, from int, dir world.ExitDir, neighb
 	if !ok || exit.Room != neighbor {
 		return exitAbsent
 	}
-	// Hidden exits are non-traversable to players but are followed by the map
-	// layout BFS, so they always render as traversable (open) connectors.
-	if exit.Hidden {
-		return exitOpen
+	p := sessPlayer(sess)
+	if exit.Hidden && !g.exitDiscovered(p, from, dir) {
+		return exitAbsent
+	}
+	if exit.AlwaysBlocked {
+		if p != nil && p.GodMode {
+			return exitOpen
+		}
+		return exitBlocked
 	}
 	if exit.Condition == nil || sess == nil || sess.Player == nil {
 		return exitOpen
@@ -616,6 +638,13 @@ func exitStateTo(g *Game, sess *net.Session, from int, dir world.ExitDir, neighb
 	return exitBlocked
 }
 
+func sessPlayer(sess *net.Session) *player.Player {
+	if sess != nil {
+		return sess.Player
+	}
+	return nil
+}
+
 func isDiagonalGlyph(ch rune) bool {
 	return ch == '\\' || ch == '/' || ch == '↗' || ch == '↖' || ch == '↘' || ch == '↙'
 }