Rework sodium download link constants

This change was made to avoid cases where people editing the sodium version checker forget to edit the download link.

src/main/java/net/coderbot/iris/Iris.java

@@ -48,7 +48,6 @@
 public class Iris implements ClientModInitializer {
 	public static final String MODID = "iris";
 	public static final Logger logger = LogManager.getLogger(MODID);
-	public static final String SODIUM_DOWNLOAD_LINK = "https://www.curseforge.com/minecraft/mc-mods/sodium/files/3488820";
 
 	private static Path shaderpacksDirectory;
 	private static ShaderpackDirectoryManager shaderpacksDirectoryManager;

src/main/java/net/coderbot/iris/compat/sodium/AllowedSodiumVersion.java

@@ -1,20 +1,24 @@
 package net.coderbot.iris.compat.sodium;
 
+import java.util.Optional;
+
 public class AllowedSodiumVersion {
 	private final String version;
+	private final String downloadLink;
 	private final boolean prefixMatch;
 
-	public AllowedSodiumVersion(String version, boolean prefixMatch) {
+	public AllowedSodiumVersion(String version, String downloadLink, boolean prefixMatch) {
 		this.version = version;
+		this.downloadLink = downloadLink;
 		this.prefixMatch = prefixMatch;
 	}
 
 	public static AllowedSodiumVersion prefix(String prefix) {
-		return new AllowedSodiumVersion(prefix, true);
+		return new AllowedSodiumVersion(prefix, null, true);
 	}
 
-	public static AllowedSodiumVersion exact(String version) {
-		return new AllowedSodiumVersion(version, false);
+	public static AllowedSodiumVersion exact(String version, String downloadLink) {
+		return new AllowedSodiumVersion(version, downloadLink, false);
 	}
 
 	public boolean matches(String candidate) {
@@ -32,4 +36,8 @@ public String getVersion() {
 	public boolean isPrefixMatch() {
 		return prefixMatch;
 	}
+
+	public Optional<String> getDownloadLink() {
+		return Optional.ofNullable(downloadLink);
+	}
 }

src/main/java/net/coderbot/iris/compat/sodium/SodiumVersionCheck.java

@@ -2,11 +2,18 @@
 
 import com.google.common.collect.ImmutableList;
 
+import java.util.Optional;
+
 public class SodiumVersionCheck {
 	// The allowed versions of Sodium for use with Iris
+	//
+	// Make sure to update the comments / download links when editing this!!!
+	// If you forget to edit the download links you'll cause the support team a bunch
+	// of pain. So don't forget!
 	private static final ImmutableList<AllowedSodiumVersion> ALLOWED_SODIUM_VERSIONS = ImmutableList.of(
 			// Official 0.2.0
-			AllowedSodiumVersion.exact("0.2.0+build.4"),
+			AllowedSodiumVersion.exact("0.2.0+build.4",
+					"https://www.curseforge.com/minecraft/mc-mods/sodium/files/3488820"),
 
 			// ReplayMod's existing compatible forked 0.2.0 version
 			AllowedSodiumVersion.prefix("0.2.0+rev.f42b4ca"),
@@ -15,6 +22,11 @@ public class SodiumVersionCheck {
 			AllowedSodiumVersion.prefix("0.2.0+replaymod")
 	);
 
+	public static String getDownloadLink() {
+		return ALLOWED_SODIUM_VERSIONS.stream().map(AllowedSodiumVersion::getDownloadLink)
+				.filter(Optional::isPresent).findFirst().get().get();
+	}
+
 	public static boolean isAllowedVersion(String sodiumVersion) {
 		for (AllowedSodiumVersion allowed : ALLOWED_SODIUM_VERSIONS) {
 			if (allowed.matches(sodiumVersion)) {

src/main/java/net/coderbot/iris/mixin/MixinTitleScreen.java

@@ -1,11 +1,11 @@
 package net.coderbot.iris.mixin;
 
 import net.coderbot.iris.Iris;
+import net.coderbot.iris.compat.sodium.SodiumVersionCheck;
 import net.fabricmc.loader.api.FabricLoader;
 import net.minecraft.ChatFormatting;
 import net.minecraft.Util;
 import net.minecraft.client.Minecraft;
-import net.minecraft.client.gui.screens.AlertScreen;
 import net.minecraft.client.gui.screens.ConfirmScreen;
 import net.minecraft.client.gui.screens.TitleScreen;
 import net.minecraft.network.chat.TranslatableComponent;
@@ -35,7 +35,7 @@ public class MixinTitleScreen {
 				(boolean accepted) -> {
 					if (accepted) {
 						try {
-							Util.getPlatform().openUri(new URI(Iris.SODIUM_DOWNLOAD_LINK));
+							Util.getPlatform().openUri(new URI(SodiumVersionCheck.getDownloadLink()));
 						} catch (URISyntaxException e) {
 							throw new IllegalStateException(e);
 						}