finished the bulk of game

src/potion.cc

@@ -1,14 +1,16 @@
 #include "potion.h"
 
+#include "constants.h"
+
 potion::potion(const potion_type type, const int duration, const position &pos):
         type{type}, remaining_duration{duration}, pos{pos} {}
 
 potion_type potion::get_type() const {
-    return type;
+        return type;
 }
 
 int potion::get_duration() const {
-    return remaining_duration;
+        return remaining_duration;
 }
 
 position potion::get_pos() const {
@@ -44,3 +46,16 @@ potion &potion::operator=(potion &&p) {
 void potion::print(display *out) {
         out->print_char(pos, 'P', COLOR_PAIR(COLOR_GREEN));
 }
+
+potion *get_potion_at(const position &pos, potion_list &plist) {
+        potion *ret = nullptr;
+
+        for (size_t i = 0; i < plist.size(); ++i)
+                if (plist[i]->get_pos() == pos) {
+                        ret = plist[i];
+                        plist.erase(plist.begin() + i);
+                        return ret;
+                }
+
+        return ret;
+}