From 51d3c52ad03931e01a2f0c9e643f7a67286f9044 Mon Sep 17 00:00:00 2001
From: Frans Bongers <fransbongers@franss-mbp.home>
Date: Fri, 3 Jan 2025 20:19:15 +0100
Subject: fix: do not allow players to sabotage their own tracks

---
 rules.ts | 71 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 67 insertions(+), 4 deletions(-)

(limited to 'rules.ts')

diff --git a/rules.ts b/rules.ts
index d306cf5..8eef855 100644
--- a/rules.ts
+++ b/rules.ts
@@ -1406,14 +1406,77 @@ states.move_track = {
   },
 };
 
+/**
+ * A player can always move a track up, unless Communist player
+ * during their turn
+ */
+function can_move_track_up(track_id: number): boolean {
+  const faction = get_active_faction();
+  return game.faction_turn === COMMUNISTS_ID &&
+    faction === COMMUNISTS_ID &&
+    track_id === GOVERNMENT
+    ? false
+    : true;
+}
+
+/**
+ * Not allowed for:
+ * - Anarchist and Liberty or Collectivization
+ * - Communist and Soviet Support
+ * - Moderate and Forgeign Aid
+ * Note: all during their turn
+ */
+function can_move_track_down(track_id): boolean {
+  const faction = get_active_faction();
+  if (
+    game.faction_turn === ANARCHISTS_ID &&
+    faction === ANARCHISTS_ID &&
+    (track_id === LIBERTY || track_id === COLLECTIVIZATION)
+  ) {
+    return false;
+  }
+
+  if (
+    game.faction_turn === COMMUNISTS_ID &&
+    faction === COMMUNISTS_ID &&
+    track_id === SOVIET_SUPPORT
+  ) {
+    return false;
+  }
+
+  if (
+    game.faction_turn === MODERATES_ID &&
+    faction === MODERATES_ID &&
+    (track_id === GOVERNMENT || track_id === FOREIGN_AID)
+  ) {
+    return false;
+  }
+
+  return true;
+}
+
 states.move_track_up_or_down = {
   inactive: 'move a track',
   prompt() {
     gen_spend_hero_points();
-    const node = get_active_node();
-    view.prompt = `Move ${get_track_name(node.a.track_id)} up or down`;
-    gen_action('up');
-    gen_action('down');
+    const { track_id } = get_active_node_args();
+    const can_move_up = can_move_track_up(track_id);
+    const can_move_down = can_move_track_down(track_id);
+    const track_name = get_track_name(track_id);
+    if (can_move_down && can_move_up) {
+      view.prompt = `Move ${track_name} up or down`;
+    } else if (can_move_up) {
+      view.prompt = `Move ${track_name} up`;
+    } else {
+      view.prompt = `Move ${track_name} down`;
+    }
+
+    if (can_move_up) {
+      gen_action('up');
+    }
+    if (can_move_down) {
+      gen_action('down');
+    }
   },
   spend_hp() {
     resolve_spend_hp();
-- 
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