[Client] Show localized card names, texts and pictures (#7294)

* [Client] Show localized card names, texts and pictures

Localization wiring now runs end to end: the oracle importer collects
foreignData for the configured language and the client renders it.

- [Oracle] Import localized names and rules texts for the selected cardLang
  - single-face cards store their foreignData name and full text
  - multi-face (split/adventure/aftermath/prepare) cards collect the joined
    name once and join each face's translated text with the same separator
    as the English merge; an incomplete translation falls back to English;
    the joined text follows the same highest-priority-set policy as the
    single-face path and is only collected when localization is enabled
  - the wizard switching languages re-imports the card database

- [Client] Display localized card info throughout the client
  - card info text/picture widgets and the game board re-render on language
    change
  - pictures resolve cardLang art through Scryfall's named endpoint using the
    localized name, falling back to id-based art when no match exists
  - deck editor keeps canonical English names as card identity (EditRole)
    while showing localized names (DisplayRole), so decks and wire names
    stay stable

- [Card] Add CardLocalization-backed name/text lookup and cards.xml v4
  localization elements with a bounded-size translation cache

- [Tests] Cover oracle foreignData import (incl. multi-face joins, priority
  and fallback paths), XML v4 localization parsing, deck model localized
  display and the language-aware settings default

Existing installations need to re-run Oracle to see translations: localized
data only lands in cards.xml when the Oracle app is started with the
preferred language selected — launch the separate "Oracle" program that
ships with Cockatrice, pick the language in the wizard and let it re-import
the card database.

The client's database cache (cards.xml.cache) is invalidated by the cache
format bump and the source-hash checks, but a cache written before the
re-import can still hold English-only entries (the hash uses file size and
mtime, so a same-size/same-timestamp rewrite may be served as-is); delete
cards.xml.cache and relaunch if no localized names/texts show up after
re-importing.

* [Card] Pass localized card names and texts into CardInfo construction

Address review: instead of constructing the card and then calling
setLocalizedName/setLocalizedText (which emit a cardInfoChanged signal per
language), both constructors, both newInstance overloads and their callers
(cards.xml v4 parser and the binary cache reader) now pass the localized maps
as constructor arguments.

* [Client] Rename LocalizedCard:: helpers namespace to CardLocalization

The namespace now matches its header file name, as the review pointed out;
LocalizedCard reads more like a class or struct. Callers (card info text
widget, board card name rendering) are updated to match.

* [Client] Drop unused info member from the card info text widget

The CardInfoPtr member was only ever initialized to nullptr and never read;
remove it together with its initializer.

* [PictureLoader] Add the localized picture URL explicitly, not implicitly

Address review: silently prepending the Scryfall named-picture URL to the
download list whenever a non-English card language was active was surprising,
consumed quota per card when it failed, and could grab the wrong (canon) art on
name collisions, with no way to turn it off.

The insert is now opt-in and user-controlled: changing the card language adds
the template to the top of the download URLs once (persisted, documented in the
re-import prompt, and editable/removable in the deck editor settings), while the
picture loader no longer injects it at request time.

* [Card] Show card languages in the same native (English) format as the UI

Address review: the card text & images language dropdown listed bare native
names, some in inconsistent lowercase (e.g. "čeština", "español de España"),
which makes the languages easy to mix up for users that do not read the script
(e.g. 日本語 vs 한국어). It now mirrors the UI language dropdown and always pairs
the native name with its English name (e.g. "Deutsch (German)",
"日本語 (Japanese)"), using the same fixed casing.

---------

Co-authored-by: Lukas Brübach <Bruebach.Lukas@bdosecurity.de>

oracle/src/oracleimporter.cpp

@@ -12,6 +12,7 @@
 #include <QSet>
 #include <algorithm>
 #include <climits>
+#include <libcockatrice/card/card_localization.h>
 #include <libcockatrice/card/database/parser/cockatrice_xml_4.h>
 #include <libcockatrice/card/relation/card_relation.h>
 
@@ -22,8 +23,9 @@ static const QList<AllowedCount> kSingletonCounts = {{1, "legal"}, {0, "banned"}
 SplitCardPart::SplitCardPart(const QString &_name,
                              const QString &_text,
                              const QHash<QString, QString> &_properties,
-                             const PrintingInfo &_printingInfo)
-    : name(_name), text(_text), properties(_properties), printingInfo(_printingInfo)
+                             const PrintingInfo &_printingInfo,
+                             const QString &_localizedText)
+    : name(_name), text(_text), localizedText(_localizedText), properties(_properties), printingInfo(_printingInfo)
 {
 }
 
@@ -33,6 +35,42 @@ OracleImporter::OracleImporter(QObject *parent) : QObject(parent)
 {
 }
 
+void OracleImporter::setCardLang(const QString &lang)
+{
+    cardLang = lang.trimmed().toLower();
+    localizationEnabled = cardLang != "en" && CardLocalization::supportedLanguages().contains(cardLang);
+}
+
+/**
+ * @brief Maps the MTGJSON foreignData language names to the short codes used by
+ *        Scryfall and stored in cards.xml (e.g. "German" -> "de").
+ * @param language The language name found in the MTGJSON foreignData entries.
+ * @return The short language code, or an empty string if unknown.
+ */
+static QString mtgjsonLanguageToCode(const QString &language)
+{
+    static const QHash<QString, QString> map = {
+        {"Chinese Simplified", "zhs"},
+        {"Chinese Traditional", "zht"},
+        {"English", "en"},
+        {"French", "fr"},
+        {"German", "de"},
+        {"Greek", "grc"},
+        {"Ancient Greek", "grc"},
+        {"Hebrew", "he"},
+        {"Italian", "it"},
+        {"Japanese", "ja"},
+        {"Korean", "ko"},
+        {"Latin", "la"},
+        {"Phyrexian", "ph"},
+        {"Portuguese (Brazil)", "pt"},
+        {"Russian", "ru"},
+        {"Sanskrit", "sa"},
+        {"Spanish", "es"},
+    };
+    return map.value(language);
+}
+
 static CardSet::Priority getSetPriority(const QString &setType, const QString &shortName)
 {
     if (!setTypePriorities.contains(setType.toLower())) {
@@ -254,6 +292,101 @@ static QString getJsonString(const QJsonObject &obj, const QString &key)
     return obj.value(key).toVariant().toString();
 }
 
+static QString normalizeCardName(QString name)
+{
+    // Mirror of the name cleanup applied in addCard(), so collected localization
+    // keys line up with the card map keys (Æ → AE, curly apostrophe → straight).
+    name = name.replace("Æ", "AE");
+    name = name.replace("’", "'");
+    return name;
+}
+
+static QString matchingForeignEntryText(const QJsonObject &card, const QString &cardLang)
+{
+    // Multi-face cards (split/aftermath/adventure/prepare) expose each face as a
+    // separate card object, each with its own foreignData entry carrying that
+    // face's rules text; single-face cards carry the full text in one entry.
+    const QJsonArray foreignData = card.value("foreignData").toArray();
+    for (const QJsonValue &entryValue : foreignData) {
+        const QJsonObject entry = entryValue.toObject();
+        // MTGJSON reports languages by long-form name ("German"); match the
+        // short code ("de") that Scryfall and cards.xml use.
+        if (mtgjsonLanguageToCode(getJsonString(entry, "language")) == cardLang) {
+            return getJsonString(entry, "text");
+        }
+    }
+    return QString();
+}
+
+void OracleImporter::collectForeignData(const QString &cardKey,
+                                        const CardSetPtr &currentSet,
+                                        const QJsonObject &card,
+                                        bool collectText)
+{
+    if (!localizationEnabled) {
+        return;
+    }
+
+    LocalizedCardEntry incoming;
+    bool found = false;
+    const QJsonArray foreignData = card.value("foreignData").toArray();
+    for (const QJsonValue &entryValue : foreignData) {
+        const QJsonObject entry = entryValue.toObject();
+        // MTGJSON reports languages by long-form name ("German"); match the
+        // short code ("de") that Scryfall and cards.xml use.
+        if (mtgjsonLanguageToCode(getJsonString(entry, "language")) != cardLang) {
+            continue;
+        }
+        incoming.name = getJsonString(entry, "name");
+        incoming.text = collectText ? getJsonString(entry, "text") : QString();
+        found = true;
+        break;
+    }
+    if (!found) {
+        return;
+    }
+
+    // Prefer the entry from the highest-priority set (lower enum value = more
+    // authoritative); printings of equal priority keep the first one seen.
+    incoming.priority = currentSet->getPriority();
+    const auto existing = localizedEntries.constFind(cardKey);
+    if (existing == localizedEntries.constEnd() || incoming.priority < existing->priority) {
+        localizedEntries.insert(cardKey, incoming);
+    }
+}
+
+void OracleImporter::applyLocalizedData()
+{
+    if (!localizationEnabled) {
+        return;
+    }
+    for (auto it = localizedEntries.constBegin(); it != localizedEntries.constEnd(); ++it) {
+        CardInfoPtr card = cards.value(it.key());
+        if (card.isNull()) {
+            continue;
+        }
+        const LocalizedCardEntry &entry = it.value();
+        if (!entry.name.isEmpty()) {
+            card->setLocalizedName(cardLang, entry.name);
+        }
+        if (!entry.text.isEmpty()) {
+            card->setLocalizedText(cardLang, entry.text);
+        }
+    }
+    localizedEntries.clear();
+
+    for (auto it = splitLocalizedTexts.constBegin(); it != splitLocalizedTexts.constEnd(); ++it) {
+        CardInfoPtr card = cards.value(it.key());
+        if (card.isNull()) {
+            continue;
+        }
+        if (!it.value().text.isEmpty()) {
+            card->setLocalizedText(cardLang, it.value().text);
+        }
+    }
+    splitLocalizedTexts.clear();
+}
+
 int OracleImporter::importCardsFromSet(const CardSetPtr &currentSet, const QJsonArray &cardsList)
 {
     // mtgjson name => xml name
@@ -397,13 +530,21 @@ int OracleImporter::importCardsFromSet(const CardSetPtr &currentSet, const QJson
         // split cards are considered a single card, enqueue for later merging
         if (layout == "split" || layout == "aftermath" || layout == "adventure" || layout == "prepare") {
             auto _faceName = getJsonString(card, "faceName");
-            SplitCardPart split(_faceName, text, properties, printingInfo);
+            // MTGJSON exposes each face as a separate card object, each with its
+            // own foreignData entry holding that face's rules text; collect it so
+            // the per-face texts can be joined the same way as the English text.
+            const QString faceLocalizedText =
+                localizationEnabled ? matchingForeignEntryText(card, cardLang) : QString();
+            SplitCardPart split(_faceName, text, properties, printingInfo, faceLocalizedText);
             auto found_iter = splitCards.find(name + numProperty);
             if (found_iter == splitCards.end()) {
                 splitCards.insert(name + numProperty, {{split}, name});
             } else {
                 found_iter->first.append(split);
             }
+            // MTGJSON's foreignData name is the joined name present on every
+            // face, so collect the name once.
+            collectForeignData(normalizeCardName(name), currentSet, card, false);
         } else {
             // relations
             QList<CardRelation *> relatedCards;
@@ -446,6 +587,8 @@ int OracleImporter::importCardsFromSet(const CardSetPtr &currentSet, const QJson
                 }
             }
 
+            collectForeignData(normalizeCardName(name + numComponent), currentSet, card);
+
             CardInfoPtr newCard =
                 addCard(name + numComponent, text, isToken, std::move(properties), relatedCards, printingInfo);
             numCards++;
@@ -459,6 +602,8 @@ int OracleImporter::importCardsFromSet(const CardSetPtr &currentSet, const QJson
     QList<QPair<QList<SplitCardPart>, QString>> partsAndNames = splitCards.values();
     for (auto [splitCardParts, name] : partsAndNames) {
         QString text;
+        QString localizedText;
+        bool localizedTextComplete = true;
         QHash<QString, QString> properties;
         PrintingInfo printingInfo;
 
@@ -468,6 +613,21 @@ int OracleImporter::importCardsFromSet(const CardSetPtr &currentSet, const QJson
             }
             text.append(tmp.getText());
 
+            // Build the cardLang text by joining each face's translated text with
+            // the same separator as the English text. Any face missing a complete
+            // translation abandons the whole join, falling back to the English text.
+            if (localizedTextComplete) {
+                const QString partLocalizedText = tmp.getLocalizedText();
+                if (partLocalizedText.isEmpty()) {
+                    localizedTextComplete = false;
+                } else {
+                    if (!localizedText.isEmpty()) {
+                        localizedText.append(splitCardTextSeparator);
+                    }
+                    localizedText.append(partLocalizedText);
+                }
+            }
+
             if (properties.isEmpty()) {
                 properties = tmp.getProperties();
                 printingInfo = tmp.getPrintingInfo();
@@ -500,6 +660,18 @@ int OracleImporter::importCardsFromSet(const CardSetPtr &currentSet, const QJson
             }
         }
         CardInfoPtr newCard = addCard(name, text, isToken, std::move(properties), {}, printingInfo);
+        if (localizationEnabled && localizedTextComplete && !localizedText.isEmpty()) {
+            // Same priority policy as collectForeignData(): the joined text from the
+            // highest-priority set seen so far wins, applied once all printings are in.
+            LocalizedCardEntry entry;
+            entry.text = localizedText;
+            entry.priority = currentSet->getPriority();
+            const QString entryKey = normalizeCardName(name);
+            const auto existing = splitLocalizedTexts.constFind(entryKey);
+            if (existing == splitLocalizedTexts.constEnd() || entry.priority < existing->priority) {
+                splitLocalizedTexts.insert(entryKey, entry);
+            }
+        }
         numCards++;
     }
 
@@ -654,6 +826,8 @@ int OracleImporter::startImport()
         emit setIndexChanged(numCardsInSet, setIndex, curSetToParse.getLongName());
     }
 
+    applyLocalizedData();
+
     emit setIndexChanged(0, setIndex, QString());
 
     // total number of sets
@@ -679,4 +853,6 @@ void OracleImporter::clear()
     cards.clear();
     allSets.clear();
     rawSetsData.clear();
+    localizedEntries.clear();
+    splitLocalizedTexts.clear();
 }