patch: Feature/ygo set selection (#16)

core/include/ccm/util/YuGiOhSetLookup.hpp

@@ -0,0 +1,67 @@
+#pragma once
+
+// Resolves a Yu-Gi-Oh! product code (YGOPRODeck `set_code`, stored as `Set.id`)
+// against a cached set list. Used by the Yu-Gi-Oh! edit dialog "set code" mode.
+
+#include "ccm/domain/Set.hpp"
+
+#include <cctype>
+#include <cstddef>
+#include <string>
+#include <string_view>
+#include <vector>
+
+namespace ccm {
+
+struct YuGiOhSetShorthandLookup {
+    enum class Kind { Unique, NotFound, Ambiguous };
+
+    Kind kind{Kind::NotFound};
+    std::size_t index{0};
+};
+
+[[nodiscard]] inline std::string normalizeYuGiOhSetIdForLookup(std::string_view id) {
+    std::string out;
+    out.reserve(id.size());
+    for (unsigned char uch : id) {
+        out.push_back(static_cast<char>(std::tolower(uch)));
+    }
+    return out;
+}
+
+[[nodiscard]] inline std::string_view trimAsciiWhitespace(std::string_view s) {
+    while (!s.empty() && std::isspace(static_cast<unsigned char>(s.front()))) {
+        s.remove_prefix(1);
+    }
+    while (!s.empty() && std::isspace(static_cast<unsigned char>(s.back()))) {
+        s.remove_suffix(1);
+    }
+    return s;
+}
+
+[[nodiscard]] inline YuGiOhSetShorthandLookup lookupYuGiOhSetByShorthand(
+    std::string_view query, const std::vector<Set>& sets) {
+    const std::string_view trimmed = trimAsciiWhitespace(query);
+    if (trimmed.empty()) {
+        return {YuGiOhSetShorthandLookup::Kind::NotFound, 0};
+    }
+    const std::string qNorm = normalizeYuGiOhSetIdForLookup(trimmed);
+
+    std::size_t firstIdx = 0;
+    int matchCount = 0;
+    for (std::size_t i = 0; i < sets.size(); ++i) {
+        if (normalizeYuGiOhSetIdForLookup(sets[i].id) == qNorm) {
+            if (matchCount == 0) firstIdx = i;
+            ++matchCount;
+            if (matchCount > 1) {
+                return {YuGiOhSetShorthandLookup::Kind::Ambiguous, 0};
+            }
+        }
+    }
+    if (matchCount == 1) {
+        return {YuGiOhSetShorthandLookup::Kind::Unique, firstIdx};
+    }
+    return {YuGiOhSetShorthandLookup::Kind::NotFound, 0};
+}
+
+}  // namespace ccm