Started implementing the Replay Center.

Expanded and generalized the ApiClient.

src/main/java/eu/crushedpixel/replaymod/gui/online/GuiReplayCenter.java

@@ -1,7 +1,158 @@
 package eu.crushedpixel.replaymod.gui.online;
 
+import java.awt.Color;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import net.minecraft.client.gui.GuiButton;
+import net.minecraft.client.gui.GuiMainMenu;
 import net.minecraft.client.gui.GuiScreen;
+import net.minecraft.client.gui.GuiYesNo;
+import net.minecraft.client.gui.GuiYesNoCallback;
+import net.minecraft.client.resources.I18n;
 
-public class GuiReplayCenter extends GuiScreen {
+import org.lwjgl.input.Keyboard;
 
+import scala.actors.threadpool.Arrays;
+
+import com.mojang.realmsclient.gui.GuiCallback;
+
+import eu.crushedpixel.replaymod.ReplayMod;
+import eu.crushedpixel.replaymod.api.client.ApiException;
+import eu.crushedpixel.replaymod.api.client.holders.FileInfo;
+import eu.crushedpixel.replaymod.gui.GuiConstants;
+import eu.crushedpixel.replaymod.online.authentication.AuthenticationHandler;
+
+public class GuiReplayCenter extends GuiScreen implements GuiYesNoCallback {
+
+	@Override
+	public void initGui() {
+		Keyboard.enableRepeatEvents(true);
+		if(!AuthenticationHandler.isAuthenticated()) {
+			mc.displayGuiScreen(new GuiLoginPrompt(new GuiMainMenu(), this));
+			return;
+		}
+
+		//Top Button Bar
+		List<GuiButton> buttonBar = new ArrayList<GuiButton>();
+
+		GuiButton overviewButton = new GuiButton(GuiConstants.CENTER_OVERVIEW_BUTTON, 20, 30, "Overview");
+		buttonBar.add(overviewButton);
+
+		GuiButton ownReplayButton = new GuiButton(GuiConstants.CENTER_MY_REPLAYS_BUTTON, 20, 30, "My Replays");
+		buttonBar.add(ownReplayButton);
+
+		GuiButton uploadReplayButton = new GuiButton(GuiConstants.CENTER_UPLOAD_BUTTON, 20, 30, "Upload");
+		buttonBar.add(uploadReplayButton);
+
+		int i = 0;
+		for(GuiButton b : buttonBar) {
+			int w = this.width - 30;
+			int w2 = w/buttonBar.size();
+
+			int x = 15+(w2*i);
+			b.xPosition = x;
+			b.yPosition = 20;
+			b.width = w2-4;
+
+			buttonList.add(b);
+
+			i++;
+		}
+
+		//Bottom Button Bar (dat alliteration)
+		List<GuiButton> bottomBar = new ArrayList<GuiButton>();
+
+		GuiButton exitButton = new GuiButton(GuiConstants.CENTER_BACK_BUTTON, 20, 20, "Back");
+		bottomBar.add(exitButton);
+
+		GuiButton logoutButton = new GuiButton(GuiConstants.CENTER_LOGOUT_BUTTON, 20, 20, "Logout");
+		bottomBar.add(logoutButton);
+
+		i = 0;
+		for(GuiButton b : bottomBar) {
+			int w = this.width - 30;
+			int w2 = w/bottomBar.size();
+
+			int x = 15+(w2*i);
+			b.xPosition = x;
+			b.yPosition = height-30;
+			b.width = w2-4;
+
+			buttonList.add(b);
+
+			i++;
+		}
+		
+		showOverview();
+	}
+
+	@Override
+	protected void actionPerformed(GuiButton button) throws java.io.IOException {
+		if(!button.enabled) return;
+		if(button.id == GuiConstants.CENTER_BACK_BUTTON) {
+			mc.displayGuiScreen(new GuiMainMenu());
+			return;
+		} else if(button.id == GuiConstants.CENTER_LOGOUT_BUTTON) {
+			mc.displayGuiScreen(getYesNoGui(this, LOGOUT_CALLBACK_ID));
+		}
+	}
+
+	private static final int LOGOUT_CALLBACK_ID = 1;
+	@Override
+	public void confirmClicked(boolean result, int id) {
+		if(id == LOGOUT_CALLBACK_ID) {
+			if(result) {
+				mc.addScheduledTask(new Runnable() {
+					@Override
+					public void run() {
+						AuthenticationHandler.logout();
+						mc.displayGuiScreen(new GuiMainMenu());
+					}
+				});
+			} else {
+				mc.displayGuiScreen(this);
+			}
+		}
+	}
+
+	public static GuiYesNo getYesNoGui(GuiYesNoCallback p_152129_0_, int p_152129_2_) {
+		String s1 = I18n.format("Do you really want to log out?", new Object[0]);
+		GuiYesNo guiyesno = new GuiYesNo(p_152129_0_, s1, "", "Logout", "Cancel", p_152129_2_);
+		return guiyesno;
+	}
+
+	@Override
+	public void drawScreen(int mouseX, int mouseY, float partialTicks) {
+		this.drawDefaultBackground();
+		this.drawCenteredString(fontRendererObj, "Replay Center", this.width/2, 8, Color.WHITE.getRGB());
+
+		super.drawScreen(mouseX, mouseY, partialTicks);
+	}
+
+	@Override
+	public void onGuiClosed() {
+		Keyboard.enableRepeatEvents(false);
+	}
+
+	public void showOverview() {
+		mc.addScheduledTask(new Runnable() {
+			@Override
+			public void run() {
+				try {
+					FileInfo[] files = ReplayMod.apiClient.getRecentFiles();
+					for(FileInfo i : files) {
+						//TODO: Display the Files
+					}
+				} catch (IOException e) {
+					e.printStackTrace();
+				} catch (ApiException e) { //TODO: Error message
+					e.printStackTrace();
+				}
+			}
+		});
+		
+
+	}
 }