[Game] Refactor: move parsePT to a static method (#6860)

cockatrice/src/game/board/card_item.cpp

@@ -396,6 +396,37 @@ void CardItem::playCard(bool faceDown)
     }
 }
 
+QVariantList CardItem::parsePT(const QString &pt)
+{
+    QVariantList ptList = QVariantList();
+    if (!pt.isEmpty()) {
+        int sep = pt.indexOf('/');
+        if (sep == 0) {
+            ptList.append(QVariant(pt.mid(1))); // cut off starting '/' and take full string
+        } else {
+            int start = 0;
+            for (;;) {
+                QString item = pt.mid(start, sep - start);
+                if (item.isEmpty()) {
+                    ptList.append(QVariant(QString()));
+                } else if (item[0] == '+') {
+                    ptList.append(QVariant(item.mid(1).toInt())); // add as int
+                } else if (item[0] == '-') {
+                    ptList.append(QVariant(item.toInt())); // add as int
+                } else {
+                    ptList.append(QVariant(item)); // add as qstring
+                }
+                if (sep == -1) {
+                    break;
+                }
+                start = sep + 1;
+                sep = pt.indexOf('/', start);
+            }
+        }
+    }
+    return ptList;
+}
+
 /**
  * @brief returns true if the zone is a unwritable reveal zone view (eg a card reveal window). Will return false if zone
  * is nullptr.

cockatrice/src/game/board/card_item.h

@@ -146,6 +146,26 @@ public:
     void drawAttachArrow();
     void playCard(bool faceDown);
 
+    /**
+     * @brief Parses a string representing a p/t in order to extract the values from it.
+     *
+     * If the string contains '/', the string will be split at the '/' and each side will be parsed separately,
+     * which means the result list will have two elements.
+     *
+     * If '/' is not found, then the entire string is parsed together, which means the result list will
+     * have a single element.
+     *
+     * If either side of the split is empty, there will also only be a single element in the result list.
+     *
+     * This function will attempt to parse each substring as an int first, handling plus and minus prefixes.
+     * If successful, it will put the parsed value into the QVariant as an int.
+     * If failed, it will just put the substring into the QVariant as a QString.
+     *
+     * @param pt The p/t string
+     * @return A QVariantList that can contain one or two elements, where each QVariant can be either int or QString
+     */
+    static QVariantList parsePT(const QString &pt);
+
 protected:
     void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
     void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;