Implement dice media display.

Telegram/SourceFiles/chat_helpers/stickers_dice_pack.cpp

@@ -0,0 +1,96 @@
+/*
+This file is part of Telegram Desktop,
+the official desktop application for the Telegram messaging service.
+
+For license and copyright information please follow this link:
+https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
+*/
+#include "chat_helpers/stickers_dice_pack.h"
+
+#include "main/main_session.h"
+#include "data/data_session.h"
+#include "data/data_document.h"
+#include "storage/localimageloader.h"
+#include "base/unixtime.h"
+#include "apiwrap.h"
+
+#include <QtCore/QFile>
+#include <QtCore/QFileInfo>
+
+namespace Stickers {
+namespace {
+
+constexpr auto kZeroDiceDocumentId = 0xa3b83c9f84fa9e83ULL;
+
+} // namespace
+
+DicePack::DicePack(not_null<Main::Session*> session)
+: _session(session) {
+}
+
+DicePack::~DicePack() = default;
+
+DocumentData *DicePack::lookup(int value) {
+	if (!_requestId) {
+		load();
+	}
+	if (!value) {
+		ensureZeroGenerated();
+		return _zero;
+	}
+	const auto i = _map.find(value);
+	return (i != end(_map)) ? i->second.get() : nullptr;
+}
+
+void DicePack::load() {
+	if (_requestId) {
+		return;
+	}
+	_requestId = _session->api().request(MTPmessages_GetStickerSet(
+		MTP_inputStickerSetDice()
+	)).done([=](const MTPmessages_StickerSet &result) {
+		result.match([&](const MTPDmessages_stickerSet &data) {
+			applySet(data);
+		});
+	}).fail([=](const RPCError &error) {
+		_requestId = 0;
+	}).send();
+}
+
+void DicePack::applySet(const MTPDmessages_stickerSet &data) {
+	auto index = 0;
+	for (const auto &sticker : data.vdocuments().v) {
+		const auto document = _session->data().processDocument(
+			sticker);
+		if (document->sticker()) {
+			_map.emplace(++index, document);
+		}
+	}
+}
+
+void DicePack::ensureZeroGenerated() {
+	if (_zero) {
+		return;
+	}
+
+	const auto path = qsl(":/gui/art/dice_idle.tgs");
+	auto task = FileLoadTask(
+		path,
+		QByteArray(),
+		nullptr,
+		SendMediaType::File,
+		FileLoadTo(0, {}, 0),
+		{});
+	task.process();
+	const auto result = task.peekResult();
+	Assert(result != nullptr);
+	_zero = _session->data().processDocument(
+		result->document,
+		std::move(result->thumb));
+	_zero->setLocation(FileLocation(path));
+
+	Ensures(_zero->sticker());
+	Ensures(_zero->sticker()->animated);
+}
+
+} // namespace Stickers