Update cipt parsing (#5712)

* refactor

* move thing out

* write unit tests

* get thing to work

* optimization?

* fix build failure

oracle/src/parsehelpers.cpp

@@ -0,0 +1,63 @@
+#include "parsehelpers.h"
+
+#include <QChar>
+#include <QRegularExpression>
+
+/**
+ * Parses the card text to determine if the card should have the cipt tag
+ *
+ * The parsing logic is able to handle the following cases:
+ * - "<name> enters tapped"
+ * - "<shortname> enters tapped", if the card name starts with the shortname
+ * - "This <type> enters tapped"
+ * - "..., it enters tapped"
+ * - Any naming scheme that appends a non-alphanumeric character plus extra text to the end of the name.
+ * (e.g. name is "Card Name_SET" or "Card Name (Set)" and text contains "Card Name enters tapped")
+ *
+ * However, it will still miss on certain cases:
+ * - shortnames that aren't the at the beginning of the card name
+ *
+ * Note that "...enters tapped unless..." returns false.
+ *
+ * @param name The name of the card
+ * @param text The oracle text of the card
+ */
+bool parseCipt(const QString &name, const QString &text)
+{
+    // Try to split shortname on most non-alphanumeric characters (including _)
+    auto isShortnameDivider = [](const QChar &c) {
+        return c == '_' || (!c.isLetterOrNumber() && c != '\'' && c != '\"');
+    };
+
+    // Try all possible shortnames.
+    // This also handles the case of extra text appended at end.
+    QStringList possibleNames;
+    bool inAlphanumericPart = true;
+    for (int i = 0; i < name.length(); ++i) {
+        if (isShortnameDivider(name.at(i))) {
+            if (inAlphanumericPart) {
+                // only add to names on a "falling edge", in order to reduce the amount of redundant splits
+                possibleNames.append(QRegularExpression::escape(name.left(i)));
+                inAlphanumericPart = false;
+            }
+        } else {
+            inAlphanumericPart = true;
+        }
+    }
+
+    // and the full name
+    possibleNames.append(QRegularExpression::escape(name));
+
+    QString subject = "(it|"            // "..., it enters tapped"
+                      "(T|t)his [^ ]+|" // "This <type> enters tapped"
+                      + possibleNames.join("|") + ")";
+
+    auto ciptPattern = QRegularExpression(
+        // cipt phrase is either first sentence of line, or is after a punctuation mark
+        "(^|(, |\\. ))" + subject +
+            // support old wording, and exclude the "unless" case
+            " enters( the battlefield)? tapped(?! unless)",
+        QRegularExpression::MultilineOption);
+
+    return ciptPattern.match(text).hasMatch();
+}