Edit version json instead of maintaining our own (IrisShaders#16)

* Edit version json instead of maintaining owown

* Only apply profile json edition to iris-loader

Code is awful, but passing the boolean feels bad when half of the things passed to the method could be derived from it

* Fix spacing

Co-authored-by: Justsnoopy30 <justsnoopy30@hypercubemc.tk>

Author: altrisi

src/main/java/net/hypercubemc/iris_installer/Installer.java

@@ -203,15 +203,6 @@ public void start() {
                 return;
             }
 
-            // Use IMS's custom fabric loader if "Install as Fabric Mod" is not set
-            if (!installAsMod) {
-                Reference.metaServerUrl = "https://raw.githubusercontent.com/IrisShaders/Iris-Installer-Maven/master/";
-                System.out.println("Using custom loader");
-            } else {
-                Reference.metaServerUrl = "https://meta.fabricmc.net/";
-                System.out.println("Using fabric loader");
-            }
-
             String loaderName = installAsMod ? "fabric-loader" : "iris-fabric-loader";
 
             try {

src/main/java/net/hypercubemc/iris_installer/VanillaLauncherIntegration.java

@@ -1,5 +1,6 @@
 package net.hypercubemc.iris_installer;
 
+import mjson.Json;
 import net.fabricmc.installer.client.ProfileInstaller;
 import net.fabricmc.installer.util.Reference;
 import net.fabricmc.installer.util.Utils;
@@ -12,7 +13,6 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.*;
-import java.util.List;
 import java.util.stream.Collectors;
 
 public class VanillaLauncherIntegration {
@@ -34,7 +34,7 @@ public static void installVersion(Path mcDir, String gameVersion, String loaderN
         String versionId = String.format("%s-%s-%s", loaderName, loaderVersion, gameVersion);
         Path versionsDir = mcDir.resolve("versions");
         Path profileDir = versionsDir.resolve(versionId);
-        Path profileJson = profileDir.resolve(versionId + ".json");
+        Path profileJsonPath = profileDir.resolve(versionId + ".json");
         if (!Files.exists(profileDir)) {
             Files.createDirectories(profileDir);
         }
@@ -43,7 +43,27 @@ public static void installVersion(Path mcDir, String gameVersion, String loaderN
         Files.deleteIfExists(dummyJar);
         Files.createFile(dummyJar);
         URL profileUrl = new URL(Reference.getMetaServerEndpoint(String.format("v2/versions/loader/%s/%s/profile/json", gameVersion, loaderVersion)));
-        Utils.downloadFile(profileUrl, profileJson);
+        Json profileJson = Json.read(profileUrl);
+        if (loaderName.equals("iris-fabric-loader")) {
+            editVersionJson(profileJson);
+        }
+        Utils.writeToFile(profileJsonPath, profileJson.toString());
+    }
+    
+    private static void editVersionJson(Json profileJson) {
+        Json.Factory factory = Json.factory();
+        Map<String, Json> json = profileJson.asJsonMap();
+        // Replace fabric-loader-etc with iris-fabric-loader-etc
+        json.compute("id", (ignored, existing) -> factory.string("iris-" + existing.asString()));
+        // Replace loader maven url and name
+        for (Json entry : json.get("libraries").asJsonList()) {
+            final String id = "net.fabricmc:fabric-loader:";
+            String name = entry.asJsonMap().get("name").asString();
+            if (name.startsWith("net.fabricmc:fabric-loader:")) {
+                entry.asJsonMap().put("name", factory.string("net.coderbot:iris-loader:" + name.substring(id.length())));
+                entry.asJsonMap().put("url", factory.string("https://raw.githubusercontent.com/IrisShaders/Iris-Installer-Maven/master/"));
+            }
+        }
     }
 
     private static void installProfile(Path mcDir, Path instanceDir, String profileName, String versionId, Icon icon, ProfileInstaller.LauncherType launcherType) throws IOException {