Add pricing from deckbrew.com

* the previous PriceUpdater class has become abstract
* BLPPriceUpdater inherits the old code for blacklotusproject.com
* DBPriceUpdater is a new implementation for deckbrew.com
* add a setting to choose between the two

cockatrice/src/priceupdater.cpp

@@ -4,25 +4,43 @@
  */
 #include <QNetworkAccessManager>
 #include <QNetworkReply>
+#include <QMessageBox>
 
 #include "qt-json/json.h"
 #include "priceupdater.h"
 
+#if QT_VERSION < 0x050000
+    // for Qt::escape() 
+    #include <QtGui/qtextdocument.h>
+#endif
+
 /**
  * Constructor.
  *
  * @param _deck deck.
  */
-PriceUpdater::PriceUpdater(const DeckList *_deck)
+AbstractPriceUpdater::AbstractPriceUpdater(const DeckList *_deck)
 {
     nam = new QNetworkAccessManager(this);
     deck = _deck;
 }
 
+// blacklotusproject.com
+
+/**
+ * Constructor.
+ *
+ * @param _deck deck.
+ */
+BLPPriceUpdater::BLPPriceUpdater(const DeckList *_deck)
+: AbstractPriceUpdater(_deck)
+{
+}
+
 /**
  * Update the prices of the cards in deckList.
  */
-void PriceUpdater::updatePrices()
+void BLPPriceUpdater::updatePrices()
 {
     QString q = "http://blacklotusproject.com/json/?cards=";
     QStringList cards = deck->getCardList();
@@ -38,7 +56,7 @@ void PriceUpdater::updatePrices()
 /**
  * Called when the download of the json file with the prices is finished.
  */
-void PriceUpdater::downloadFinished()
+void BLPPriceUpdater::downloadFinished()
 {
     QNetworkReply *reply = static_cast<QNetworkReply *>(sender());
     bool ok;
@@ -82,3 +100,115 @@ void PriceUpdater::downloadFinished()
     deleteLater();
     emit finishedUpdate();
 }
+
+// deckbrew.com
+
+/**
+ * Constructor.
+ *
+ * @param _deck deck.
+ */
+DBPriceUpdater::DBPriceUpdater(const DeckList *_deck)
+: AbstractPriceUpdater(_deck)
+{
+}
+
+/**
+ * Update the prices of the cards in deckList.
+ */
+void DBPriceUpdater::updatePrices()
+{
+    QString q = "https://api.deckbrew.com/mtg/cards";
+    QStringList cards = deck->getCardList();
+    for (int i = 0; i < cards.size(); ++i) {
+        q += (i ? "&" : "?")  + QString("name=") + cards[i].toLower();
+    }
+    QUrl url(q.replace(' ', '+'));
+
+    QNetworkReply *reply = nam->get(QNetworkRequest(url));
+    connect(reply, SIGNAL(finished()), this, SLOT(downloadFinished()));
+}
+
+/**
+ * Called when the download of the json file with the prices is finished.
+ */
+void DBPriceUpdater::downloadFinished()
+{
+    QNetworkReply *reply = static_cast<QNetworkReply *>(sender());
+    bool ok;
+    QString tmp = QString(reply->readAll());
+
+    // Errors are incapsulated in an object, check for them first
+    QVariantMap resultMap = QtJson::Json::parse(tmp, ok).toMap();
+    if (!ok) {
+        QMessageBox::critical(this, tr("Error"), tr("A problem has occured while fetching card prices."));
+        reply->deleteLater();
+        deleteLater();
+        return;
+    }
+
+    if(resultMap.contains("errors"))
+    {
+        QMessageBox::critical(this, tr("Error"), tr("A problem has occured while fetching card prices:") + 
+            "<br/>" +
+#if QT_VERSION < 0x050000
+            Qt::escape(resultMap["errors"].toList().first().toString())
+#else
+            resultMap["errors"].toList().first().toString().toHtmlEscaped()
+#endif
+        );
+        reply->deleteLater();
+        deleteLater();
+        return;
+    }
+
+    // Good results are a list
+    QVariantList resultList = QtJson::Json::parse(tmp, ok).toList();
+    if (!ok) {
+        QMessageBox::critical(this, tr("Error"), tr("A problem has occured while fetching card prices."));
+        reply->deleteLater();
+        deleteLater();
+        return;
+    }
+
+    QMap<QString, float> cardsPrice;
+
+    QListIterator<QVariant> it(resultList);
+    while (it.hasNext()) {
+        QVariantMap map = it.next().toMap();
+        QString name = map.value("name").toString().toLower();
+
+        QList<QVariant> editions = map.value("editions").toList();
+        foreach (QVariant ed, editions)
+        {
+            QVariantMap edition = ed.toMap();
+            QString set = edition.value("set_id").toString();
+            // Prices are in USD cents
+            float price = edition.value("price").toMap().value("median").toString().toFloat() / 100;
+            //qDebug() << "card " << name << " set " << set << " price " << price << endl;
+
+            /**
+            * Make sure Masters Edition (MED) isn't the set, as it doesn't
+            * physically exist. Also check the price to see that the cheapest set
+            * ends up as the final price.
+            */
+            if (set != "MED" && (!cardsPrice.contains(name) || cardsPrice.value(name) > price))
+                cardsPrice.insert(name, price);
+        }
+    }
+    
+    InnerDecklistNode *listRoot = deck->getRoot();
+    for (int i = 0; i < listRoot->size(); i++) {
+        InnerDecklistNode *currentZone = dynamic_cast<InnerDecklistNode *>(listRoot->at(i));
+        for (int j = 0; j < currentZone->size(); j++) {
+            DecklistCardNode *currentCard = dynamic_cast<DecklistCardNode *>(currentZone->at(j));
+            if (!currentCard)
+                continue;
+            currentCard->setPrice(cardsPrice[currentCard->getName().toLower()]);
+        }
+    }
+    
+    reply->deleteLater();
+    deleteLater();
+    emit finishedUpdate();
+}