Legacy Forge Support

daedalus/src/forge.rs

@@ -0,0 +1,21 @@
+use crate::{download_file, Error};
+
+use std::collections::HashMap;
+
+/// The latest version of the format the model structs deserialize to
+pub const CURRENT_FORMAT_VERSION: usize = 0;
+
+const DEFAULT_MAVEN_METADATA_URL: &str =
+    "https://files.minecraftforge.net/net/minecraftforge/forge/maven-metadata.json";
+
+/// Fetches the forge maven metadata from the specified URL. If no URL is specified, the default is used.
+/// Returns a hashmap specifying the versions of the forge mod loader
+/// The hashmap key is a Minecraft version, and the value is the loader versions that work on
+/// the specified Minecraft version
+pub async fn fetch_maven_metadata(
+    url: Option<&str>,
+) -> Result<HashMap<String, Vec<String>>, Error> {
+    Ok(serde_json::from_slice(
+        &download_file(url.unwrap_or(DEFAULT_MAVEN_METADATA_URL), None).await?,
+    )?)
+}