From 3c76a4b5a784f2d30cf97f202666ad80a97b00d2 Mon Sep 17 00:00:00 2001
From: "D. Polders" <zigurana@gmail.com>
Date: Tue, 20 Dec 2016 21:25:35 +0100
Subject: [PATCH] Go-to Random Game feature

---
 es-app/src/guis/GuiGamelistOptions.cpp        | 13 ++++++++
 es-app/src/main.cpp                           |  2 ++
 es-app/src/views/SystemView.cpp               |  6 ++++
 es-app/src/views/ViewController.cpp           | 31 +++++++++++++++++++
 es-app/src/views/ViewController.h             |  1 +
 .../src/views/gamelist/BasicGameListView.cpp  |  1 +
 .../views/gamelist/ISimpleGameListView.cpp    |  4 +++
 7 files changed, 58 insertions(+)

diff --git a/es-app/src/guis/GuiGamelistOptions.cpp b/es-app/src/guis/GuiGamelistOptions.cpp
index cb8f45d68..9d2b3f8ab 100644
--- a/es-app/src/guis/GuiGamelistOptions.cpp
+++ b/es-app/src/guis/GuiGamelistOptions.cpp
@@ -35,6 +35,19 @@ GuiGamelistOptions::GuiGamelistOptions(Window* window, SystemData* system) : Gui
 	};
 	mMenu.addRow(row);
 
+	row.elements.clear();
+	row.addElement(std::make_shared<TextComponent>(mWindow, "SURPRISE ME!", Font::get(FONT_SIZE_MEDIUM), 0x777777FF), true);
+	row.input_handler = [&](InputConfig* config, Input input) {
+		if (config->isMappedTo("a", input) && input.value)
+		{
+			ViewController::get()->goToRandomGame();
+			delete this;
+			return true;
+		}
+		return false;
+	};
+	mMenu.addRow(row);
+
 	// sort list by
 	mListSort = std::make_shared<SortList>(mWindow, "SORT GAMES BY", false);
 	for(unsigned int i = 0; i < FileSorts::SortTypes.size(); i++)
diff --git a/es-app/src/main.cpp b/es-app/src/main.cpp
index c3d030ec4..dec399bde 100644
--- a/es-app/src/main.cpp
+++ b/es-app/src/main.cpp
@@ -166,6 +166,8 @@ void onExit()
 
 int main(int argc, char* argv[])
 {
+	srand((unsigned int)time(NULL));
+
 	unsigned int width = 0;
 	unsigned int height = 0;
 
diff --git a/es-app/src/views/SystemView.cpp b/es-app/src/views/SystemView.cpp
index 272d4c634..47ede5124 100644
--- a/es-app/src/views/SystemView.cpp
+++ b/es-app/src/views/SystemView.cpp
@@ -134,6 +134,11 @@ bool SystemView::input(InputConfig* config, Input input)
 			ViewController::get()->goToGameList(getSelected());
 			return true;
 		}
+		if (config->isMappedTo("x", input))
+		{
+			ViewController::get()->goToRandomGame();
+			return true;
+		}
 	}else{
 		if(config->isMappedTo("left", input) || 
 			config->isMappedTo("right", input) ||
@@ -286,6 +291,7 @@ std::vector<HelpPrompt> SystemView::getHelpPrompts()
 	else
 		prompts.push_back(HelpPrompt("left/right", "choose"));
 	prompts.push_back(HelpPrompt("a", "select"));
+	prompts.push_back(HelpPrompt("x", "random"));
 	return prompts;
 }
 
diff --git a/es-app/src/views/ViewController.cpp b/es-app/src/views/ViewController.cpp
index cc83eece5..de35e614e 100644
--- a/es-app/src/views/ViewController.cpp
+++ b/es-app/src/views/ViewController.cpp
@@ -119,6 +119,37 @@ void ViewController::goToGameList(SystemData* system)
 	playViewTransition();
 }
 
+void ViewController::goToRandomGame()
+{
+	unsigned int total = 0;
+	for(auto it = SystemData::sSystemVector.begin(); it != SystemData::sSystemVector.end(); it++)
+	{
+		if ((*it)->getName() != "retropie")
+			total += (*it)->getGameCount();
+	}
+	
+	// get random number in range
+	int target = std::round(((double)std::rand() / (double)RAND_MAX) * total);
+	
+	for (auto it = SystemData::sSystemVector.begin(); it != SystemData::sSystemVector.end(); it++)
+	{
+		if ((*it)->getName() != "retropie")
+		{
+			if ((target - (int)(*it)->getGameCount()) >= 0)
+			{
+				target -= (int)(*it)->getGameCount();
+			}
+			else
+			{
+				goToGameList(*it);
+				std::vector<FileData*> list = (*it)->getRootFolder()->getFilesRecursive(GAME);
+				getGameListView(*it)->setCursor(list.at(target));
+				return;
+			}
+		}
+	}
+}
+
 void ViewController::playViewTransition()
 {
 	Eigen::Vector3f target(Eigen::Vector3f::Identity());
diff --git a/es-app/src/views/ViewController.h b/es-app/src/views/ViewController.h
index 2658f44a9..24f634399 100644
--- a/es-app/src/views/ViewController.h
+++ b/es-app/src/views/ViewController.h
@@ -30,6 +30,7 @@ public:
 	void goToGameList(SystemData* system);
 	void goToSystemView(SystemData* system);
 	void goToStart();
+	void goToRandomGame();
 
 	void onFileChanged(FileData* file, FileChangeType change);
 
diff --git a/es-app/src/views/gamelist/BasicGameListView.cpp b/es-app/src/views/gamelist/BasicGameListView.cpp
index d3cbc017a..0cd5b023c 100644
--- a/es-app/src/views/gamelist/BasicGameListView.cpp
+++ b/es-app/src/views/gamelist/BasicGameListView.cpp
@@ -118,5 +118,6 @@ std::vector<HelpPrompt> BasicGameListView::getHelpPrompts()
 	prompts.push_back(HelpPrompt("a", "launch"));
 	prompts.push_back(HelpPrompt("b", "back"));
 	prompts.push_back(HelpPrompt("select", "options"));
+	prompts.push_back(HelpPrompt("x", "random"));
 	return prompts;
 }
diff --git a/es-app/src/views/gamelist/ISimpleGameListView.cpp b/es-app/src/views/gamelist/ISimpleGameListView.cpp
index dd6df5b63..6fae30059 100644
--- a/es-app/src/views/gamelist/ISimpleGameListView.cpp
+++ b/es-app/src/views/gamelist/ISimpleGameListView.cpp
@@ -102,6 +102,10 @@ bool ISimpleGameListView::input(InputConfig* config, Input input)
 				ViewController::get()->goToPrevGameList();
 				return true;
 			}
+		}else if (config->isMappedTo("x", input))
+		{
+			ViewController::get()->goToRandomGame();
+			return true;
 		}
 	}