fix(launcher): defer CurseForge mod distribution exception until download is attempted

launcher/src/main/java/io/gitlab/jfronny/inceptum/launcher/api/CurseforgeApi.java

@@ -51,25 +51,17 @@ public class CurseforgeApi {
         if (response.pagination().totalCount() != 1) {
             throw new FileNotFoundException("Could not find mod with slug \"" + slug + "\"");
         }
-        return checkDistribution(response.data().getFirst());
+        return response.data().getFirst();
     }
 
     public static CurseforgeMod getMod(int id) throws IOException {
-        return checkDistribution(Net.downloadJObject(API_URL + "mods/" + id, GC_GetModResponse::deserialize, API_KEY).data());
+        return Net.downloadJObject(API_URL + "mods/" + id, GC_GetModResponse::deserialize, API_KEY).data();
     }
 
     public static String getDescription(int id) throws IOException {
         return Net.downloadJObject(API_URL + "mods/" + id + "/description", GC_GetModDescriptionResponse::deserialize, API_KEY).data();
     }
 
-    private static CurseforgeMod checkDistribution(CurseforgeMod mod) {
-        if (!mod.allowModDistribution()) {
-            throw new IllegalArgumentException("The author of the mod \"" + mod.slug() + "\" has chosen to deliberately break your ability of downloading it.\n"
-                    + "Please let them know that disabling third party downloads does nothing but make the users life harder for no reason.");
-        }
-        return mod;
-    }
-
     public static CurseforgeFile getFile(int modId, int fileId) throws IOException {
         return Net.downloadJObject(API_URL + "mods/" + modId + "/files/" + fileId, GC_GetModFileResponse::deserialize, API_KEY).data();
     }

launcher/src/main/java/io/gitlab/jfronny/inceptum/launcher/system/mds/flow/MdsDownloadTask.java

@@ -8,6 +8,7 @@ import io.gitlab.jfronny.inceptum.launcher.model.fabric.FabricModJson;
 import io.gitlab.jfronny.inceptum.launcher.model.fabric.GC_FabricModJson;
 import io.gitlab.jfronny.inceptum.launcher.system.instance.ModPath;
 import io.gitlab.jfronny.inceptum.launcher.system.mds.*;
+import io.gitlab.jfronny.inceptum.launcher.system.source.DistributionDisabledException;
 import io.gitlab.jfronny.inceptum.launcher.system.source.ModSource;
 
 import java.io.IOException;
@@ -18,9 +19,14 @@ public record MdsDownloadTask(ProtoInstance instance) implements ThrowingConsume
     public void accept(MdsMod mod) throws IOException {
         if (mod.getScanStage().contains(ScanStage.DOWNLOAD)) return;
         ModSource selectedSource = null;
+        DistributionDisabledException distributionDisabledException = null;
         for (ModSource source : mod.getMetadata().sources().keySet()) {
+            try {
                 if (!Files.exists(source.getJarPath()) && HttpClient.wasOnline()) source.download();
                 selectedSource = source;
+            } catch (DistributionDisabledException de) {
+                distributionDisabledException = de;
+            }
         }
         Path imodPath = mod.getMetadataPath();
         Path jarPath = mod.getJarPath();
@@ -39,7 +45,11 @@ public record MdsDownloadTask(ProtoInstance instance) implements ThrowingConsume
                 jarPath = selectedSource.getJarPath();
                 managed = true;
             }
-        } else if (!Files.exists(jarPath)) throw new IOException("Mod has no jar and no sources");
+        } else if (!Files.exists(jarPath)) {
+            IOException exception = new IOException("Mod has no jar and no sources");
+            if (distributionDisabledException != null) exception.addSuppressed(distributionDisabledException);
+            throw exception;
+        }
 
         FabricModJson fmj;
         try (FileSystem fs = Utils.openZipFile(jarPath, false)) {

launcher/src/main/java/io/gitlab/jfronny/inceptum/launcher/system/mds/threaded/FileScanTask.java

@@ -10,6 +10,7 @@ import io.gitlab.jfronny.inceptum.launcher.model.inceptum.ModMeta;
 import io.gitlab.jfronny.inceptum.launcher.system.mds.*;
 import io.gitlab.jfronny.inceptum.launcher.system.instance.ModPath;
 import io.gitlab.jfronny.inceptum.launcher.system.mds.noop.NoopMod;
+import io.gitlab.jfronny.inceptum.launcher.system.source.DistributionDisabledException;
 import io.gitlab.jfronny.inceptum.launcher.system.source.ModSource;
 
 import java.io.IOException;
@@ -46,9 +47,14 @@ public record FileScanTask(ProtoInstance instance, Path file, ThrowingBiConsumer
         }
         meta.updateCheck(gameVersion);
         ModSource selectedSource = null;
+        DistributionDisabledException distributionDisabledException = null;
         for (ModSource source : meta.sources().keySet()) {
+            try {
                 if (!Files.exists(source.getJarPath())) source.download();
                 selectedSource = source;
+            } catch (DistributionDisabledException de) {
+                distributionDisabledException = de;
+            }
         }
         if (selectedSource != null) {
             if (Files.exists(jarPath)) {
@@ -60,7 +66,11 @@ public record FileScanTask(ProtoInstance instance, Path file, ThrowingBiConsumer
             }
             jarPath = selectedSource.getJarPath();
             managed = true;
-        } else if (!Files.exists(jarPath)) throw new IOException("Mod has no jar and no sources");
+        } else if (!Files.exists(jarPath)) {
+            IOException exception = new IOException("Mod has no jar and no sources");
+            if (distributionDisabledException != null) exception.addSuppressed(distributionDisabledException);
+            throw exception;
+        }
         if (modified) meta = GC_ModMeta.deserialize(imodPath, GsonPreset.CONFIG);
 
         FabricModJson fmj;

launcher/src/main/java/io/gitlab/jfronny/inceptum/launcher/system/source/CurseforgeModSource.java

@@ -41,6 +41,7 @@ public final class CurseforgeModSource implements ModSource {
 
     @Override
     public ModDownload download() throws IOException {
+        if (!allowModDistribution()) throw new DistributionDisabledException(mod.slug());
         Path path = getJarPath();
         try {
             Net.downloadFile(current.downloadUrl(), path);
@@ -132,6 +133,10 @@ public final class CurseforgeModSource implements ModSource {
         return other instanceof CurseforgeModSource cu && cu.projectId == projectId;
     }
 
+    public boolean allowModDistribution() {
+        return mod.allowModDistribution();
+    }
+
     public int getFileId() {
         return fileId;
     }

launcher/src/main/java/io/gitlab/jfronny/inceptum/launcher/system/source/DistributionDisabledException.java

@@ -0,0 +1,10 @@
+package io.gitlab.jfronny.inceptum.launcher.system.source;
+
+import java.io.IOException;
+
+public class DistributionDisabledException extends IOException {
+    public DistributionDisabledException(String mod) {
+        super("The author of the mod \"" + mod + "\" has chosen to deliberately break your ability of downloading it.\n"
+                + "Please let them know that disabling third party downloads does nothing but make the users life harder for no reason.");
+    }
+}