From ef8b6d1a3db47bb4020a6181a88827b54731aa9e Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Wed, 28 Feb 2018 15:06:57 +0300
Subject: [PATCH] Process currency amounts before display.

---
 .../history/history_media_types.cpp           | 50 +++++++++++++++++--
 1 file changed, 46 insertions(+), 4 deletions(-)

diff --git a/Telegram/SourceFiles/history/history_media_types.cpp b/Telegram/SourceFiles/history/history_media_types.cpp
index 765d55d6b..e612fe6d3 100644
--- a/Telegram/SourceFiles/history/history_media_types.cpp
+++ b/Telegram/SourceFiles/history/history_media_types.cpp
@@ -4231,15 +4231,57 @@ HistoryInvoice::HistoryInvoice(
 	fillFromData(invoice);
 }
 
-QString HistoryInvoice::fillAmountAndCurrency(uint64 amount, const QString &currency) {
-	static auto shortCurrencyNames = QMap<QString, QString> {
+QString HistoryInvoice::fillAmountAndCurrency(
+		uint64 amount,
+		const QString &currency) {
+	static const auto ShortCurrencyNames = QMap<QString, QString> {
 		{ qsl("USD"), QString::fromUtf8("\x24") },
 		{ qsl("GBP"), QString::fromUtf8("\xC2\xA3") },
 		{ qsl("EUR"), QString::fromUtf8("\xE2\x82\xAC") },
 		{ qsl("JPY"), QString::fromUtf8("\xC2\xA5") },
 	};
-	auto currencyText = shortCurrencyNames.value(currency, currency);
-	return QLocale::system().toCurrencyString(amount / 100., currencyText);
+	static const auto Denominators = QMap<QString, int> {
+		{ qsl("CLF"), 10000 },
+		{ qsl("BHD"), 1000 },
+		{ qsl("IQD"), 1000 },
+		{ qsl("JOD"), 1000 },
+		{ qsl("KWD"), 1000 },
+		{ qsl("LYD"), 1000 },
+		{ qsl("OMR"), 1000 },
+		{ qsl("TND"), 1000 },
+		{ qsl("BIF"), 1 },
+		{ qsl("BYR"), 1 },
+		{ qsl("CLP"), 1 },
+		{ qsl("CVE"), 1 },
+		{ qsl("DJF"), 1 },
+		{ qsl("GNF"), 1 },
+		{ qsl("ISK"), 1 },
+		{ qsl("JPY"), 1 },
+		{ qsl("KMF"), 1 },
+		{ qsl("KRW"), 1 },
+		{ qsl("MGA"), 1 },
+		{ qsl("PYG"), 1 },
+		{ qsl("RWF"), 1 },
+		{ qsl("UGX"), 1 },
+		{ qsl("UYI"), 1 },
+		{ qsl("VND"), 1 },
+		{ qsl("VUV"), 1 },
+		{ qsl("XAF"), 1 },
+		{ qsl("XOF"), 1 },
+		{ qsl("XPF"), 1 },
+		{ qsl("MRO"), 10 },
+	};
+	const auto currencyText = ShortCurrencyNames.value(currency, currency);
+	const auto denominator = Denominators.value(currency, 100);
+	const auto currencyValue = amount / float64(denominator);
+	const auto digits = [&] {
+		auto result = 0;
+		for (auto test = 1; test < denominator; test *= 10) {
+			++result;
+		}
+		return result;
+	}();
+	return QLocale::system().toCurrencyString(currencyValue, currencyText);
 	//auto amountBucks = amount / 100;
 	//auto amountCents = amount % 100;
 	//auto amountText = qsl("%1,%2").arg(amountBucks).arg(amountCents, 2, 10, QChar('0'));