feat: hidden exits (and related flags) work with commands that change room ids. exit code simplified and unified between impassable and blocked exits.

1 files changed, 56 insertions, 0 deletions

diff --git a/internal/game/exit_display.go b/internal/game/exit_display.go
new file mode 100644
index 0000000..4540669
--- /dev/null
+++ b/internal/game/exit_display.go
@@ -0,0 +1,56 @@
+package game
+
+import (
+	"thehouseoficarus/internal/net"
+	"thehouseoficarus/internal/world"
+)
+
+// exitDisplay summarizes how an exit appears to a player: whether it is listed
+// at all (and traversable by the map BFS / walk pathfinder), whether movement
+// is refused (and the look listing should tag it "(blocked)"), and whether the
+// listing should tag it "(HIDDEN)".
+//
+// It is the single source of truth shared by the look listing, the standalone
+// `exits` command, `look <direction>`, movement, the map connector state, the
+// `verbs` command, and the walk pathfinder — replacing the per-callsite inline
+// checks that previously disagreed (e.g. gods saw a "(blocked)" tag in look
+// even though they can traverse and the map renders the link open).
+//
+// Semantics:
+//   - Hidden exit: visible only once discovered (gods always discover). When
+//     visible it is tagged "(HIDDEN)". A nil player (background render) never
+//     discovers, so hidden exits are absent.
+//   - God mode: exits are visible and never blocked (matches map rendering).
+//   - always_blocked: absolute — blocks movement/listing/map regardless of any
+//     condition. The condition is NOT evaluated when always_blocked is set.
+//   - condition: blocks when present and failing for this player.
+type exitDisplay struct {
+	Visible   bool
+	Blocked   bool
+	TagHidden bool
+}
+
+func (g *Game) exitDisplayState(sess *net.Session, roomID int, dir world.ExitDir, exit world.ExitDef) exitDisplay {
+	var ed exitDisplay
+	p := sessPlayer(sess)
+	if exit.Hidden {
+		// exitDiscovered already returns true for gods; nil player never discovers.
+		if p != nil && g.exitDiscovered(p, roomID, dir) {
+			ed.Visible = true
+			ed.TagHidden = true
+		}
+		return ed
+	}
+	ed.Visible = true
+	if p == nil || p.GodMode {
+		return ed
+	}
+	if exit.AlwaysBlocked {
+		ed.Blocked = true
+		return ed
+	}
+	if exit.Condition != nil && !g.checkCondition(sess, exit.Condition) {
+		ed.Blocked = true
+	}
+	return ed
+}