ru:: guarded items

rogueviz/ru/classes.cpp

@@ -841,6 +841,23 @@ struct shopitem : public item {
   virtual void hs(stater& s) override { item::hs(s); s.act("bought", bought, false).act("last_intersect", last_intersect, 0); }
   };
 
+struct non_spatial_entity : public entity {
+  virtual xy siz() { return {0,0}; }
+  virtual string glyph() { return "?"; }
+  virtual color_t color() { return 0xC04040FF; }
+  virtual void draw() override {}
+  virtual void act() override {}
+  virtual bool hidden() override { return true; }
+  };
+
+struct guard_event : non_spatial_entity {
+  entity *item, *monster;
+  string monster_name;
+  bool active;
+  virtual void act() override;
+  virtual void hs(stater& s) override { entity::hs(s); s.act("active", active, false); }
+  };
+
 struct loot : public item {
   entity *owner;
   bool dropped;

rogueviz/ru/entity.cpp

@@ -936,4 +936,27 @@ void icicle::act() {
     }
   }
 
+void guard_event::act() {
+  if(monster == nullptr) {
+    if(!entity_by_id.count(monster_name)) {
+      println(hlog, "Guard event not connected correctly: ", monster_name);
+      existing = false;
+      return;
+      }
+    monster = entity_by_id[monster_name];
+    println(hlog, "guard event connected");
+    }
+  if(item->existing && monster->existing) {
+    active = true;
+    monster->existing = false;
+    println(hlog, "guard event activated");
+    }
+  if(active && !item->existing && !monster->existing) {
+    monster->existing = true;
+    monster->invinc_end = max(monster->invinc_end, gframeid + 100);
+    active = false;
+    println(hlog, "guard event deactivated");
+    }
+  }
+
 }

rogueviz/ru/globals.cpp

@@ -194,4 +194,5 @@ extern vector<unique_ptr<struct entity>> new_entities;
 string unspace(const string& s);
 string respace(const string& s);
 
+extern map<string, entity*> entity_by_id;
 }

rogueviz/ru/load-world.cpp

@@ -185,6 +185,17 @@ void load_room(fhstream& f, cell *c) {
         b->id = unspace(b->pickup_message = scanline_noblank(f));
         r.entities.emplace_back(std::move(b));
         }
+      else if(cap == "GUARD") {
+        auto loot = &*r.entities.back();
+        println(hlog, "loot is ", loot->id);
+        auto b = std::make_unique<guard_event>();
+        b->item = loot;
+        b->monster = nullptr;
+        b->monster_name = cutoff("NOTHING");
+        b->id = b->monster_name + "-GUARD";
+        println(hlog, "guard ", b->id, " added on ", b->item->id);
+        r.entities.emplace_back(std::move(b));
+        }
       else if(cap == "SHOPITEM") {
         auto b = std::make_unique<shopitem>();
         b->respawn = get_xy();