Downloading launcher files

theseus/src/launcher/meta.rs

@@ -0,0 +1,161 @@
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+
+#[derive(Serialize, Deserialize, Debug)]
+#[serde(rename_all = "snake_case")]
+pub enum VersionType {
+    Release,
+    Snapshot,
+    OldAlpha,
+    OldBeta,
+}
+
+#[derive(Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct Version {
+    pub id: String,
+    #[serde(rename = "type")]
+    pub type_: VersionType,
+    pub url: String,
+    pub time: DateTime<Utc>,
+    pub release_time: DateTime<Utc>,
+}
+
+#[derive(Deserialize, Debug)]
+pub struct LatestVersion {
+    pub release: String,
+    pub snapshot: String,
+}
+
+#[derive(Deserialize, Debug)]
+pub struct VersionManifest {
+    pub latest: LatestVersion,
+    pub versions: Vec<Version>,
+}
+
+pub async fn fetch_version_manifest() -> Result<VersionManifest, reqwest::Error> {
+    reqwest::get("https://launchermeta.mojang.com/mc/game/version_manifest.json")
+        .await?
+        .json()
+        .await
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct AssetIndex {
+    pub id: String,
+    pub sha1: String,
+    pub size: u32,
+    pub total_size: u32,
+    pub url: String,
+}
+
+#[derive(Serialize, Deserialize, Debug, Eq, PartialEq, Hash)]
+#[serde(rename_all = "snake_case")]
+pub enum DownloadType {
+    Client,
+    ClientMappings,
+    Server,
+    ServerMappings,
+    WindowsServer,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct Download {
+    pub sha1: String,
+    pub size: u32,
+    pub url: String,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct LibraryDownload {
+    pub path: String,
+    pub sha1: String,
+    pub size: u32,
+    pub url: String,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct LibraryDownloads {
+    pub artifact: Option<LibraryDownload>,
+    pub classifiers: Option<HashMap<String, LibraryDownload>>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+#[serde(rename_all = "snake_case")]
+pub enum RuleAction {
+    Allow,
+    Disallow,
+}
+
+#[derive(Serialize, Deserialize, Debug, Eq, PartialEq, Hash)]
+#[serde(rename_all = "snake_case")]
+pub enum Os {
+    Osx,
+    Windows,
+    Linux,
+    Unknown,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct OsRule {
+    pub name: Os,
+    pub version: Option<String>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct LibraryRule {
+    pub action: RuleAction,
+    pub os: Option<OsRule>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct LibraryExtract {
+    pub exclude: Option<Vec<String>>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct Library {
+    pub downloads: LibraryDownloads,
+    pub extract: Option<LibraryExtract>,
+    pub name: String,
+    pub natives: Option<HashMap<Os, String>>,
+    pub rules: Option<Vec<LibraryRule>>,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct VersionInfo {
+    pub asset_index: AssetIndex,
+    pub assets: String,
+    pub downloads: HashMap<DownloadType, Download>,
+    pub id: String,
+    pub libraries: Vec<Library>,
+    pub main_class: String,
+    pub minecraft_arguments: String,
+    pub minimum_launcher_version: u32,
+    pub release_time: DateTime<Utc>,
+    pub time: DateTime<Utc>,
+    #[serde(rename = "type")]
+    pub type_: VersionType,
+}
+
+pub async fn fetch_version_info(version: &Version) -> Result<VersionInfo, reqwest::Error> {
+    reqwest::get(&version.url).await?.json().await
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct Asset {
+    pub hash: String,
+    pub size: u32,
+}
+
+#[derive(Serialize, Deserialize, Debug)]
+pub struct AssetsIndex {
+    pub objects: HashMap<String, Asset>,
+}
+
+pub async fn fetch_assets_index(version: &VersionInfo) -> Result<AssetsIndex, reqwest::Error> {
+    reqwest::get(&version.asset_index.url).await?.json().await
+}