From 152b5eb76d40a501ae58a63cd0daf5237580a3b9 Mon Sep 17 00:00:00 2001
From: Martin Ashby <martin@ashbysoft.com>
Date: Sun, 10 Sep 2023 20:01:55 +0100
Subject: finish parsing client.json

---
 src/main.zig | 137 ++++++++++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 97 insertions(+), 40 deletions(-)

diff --git a/src/main.zig b/src/main.zig
index 8ca780b..4b6fdd5 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -1,5 +1,46 @@
 const std = @import("std");
 
+/// Minecraft launcher!
+pub fn main() !void {
+    var gpa = std.heap.GeneralPurposeAllocator(.{ .safety = false }){}; // TODO turn safety back on
+    defer _ = gpa.deinit();
+    const allocator = gpa.allocator();
+    var client = std.http.Client{ .allocator = allocator };
+    defer client.deinit();
+
+    const manifest_wrap = try download_json(&client, Manifest, Manifest.uri);
+    defer manifest_wrap.deinit();
+    const manifest = manifest_wrap.value;
+    std.log.info("release: {s} snapshot: {s}", .{ manifest.latest.release, manifest.latest.snapshot });
+
+    // Find the release version
+    const release_version_url = for (manifest.versions) |v| {
+        if (std.mem.eql(u8, v.id, manifest.latest.release)) {
+            break v.url;
+        }
+    } else {
+        return error.NoReleaseVersionFound;
+    };
+
+    var release_version_wrap = try download_json(&client, Version, release_version_url);
+    defer release_version_wrap.deinit();
+    const release_version = release_version_wrap.value;
+    _ = release_version;
+
+    // Download all the bits
+
+    // std.mem.replace(comptime T: type, input: []const T, needle: []const T, replacement: []const T, output: []T)
+
+    // check the latest.release
+    // find that in the versions[] by key id
+    // get the download URL for that https://piston-meta.mojang.com/v1/packages/1f376e6cb981265af345076889f9ef325bb6b9e8/1.20.1.json
+
+    // get arguments.game and arguments.jvm ready to supply ...
+    // probably just use the system java version for now
+    //
+}
+
+/// https://minecraft.fandom.com/wiki/Version_manifest.json
 const Manifest = struct {
     const uri = "https://piston-meta.mojang.com/mc/game/version_manifest_v2.json";
 
@@ -17,6 +58,7 @@ const Manifest = struct {
     },
 };
 
+/// https://minecraft.fandom.com/wiki/Client.json
 const Version = struct {
     const Rule = struct {
         const Feature = struct {
@@ -75,53 +117,68 @@ const Version = struct {
             }
         }
     };
+    const Download = struct {
+        sha1: []const u8,
+        size: u64, 
+        url: []const u8,
+    };
+    const Library = struct {
+        downloads: struct {
+            artifact: struct {
+                path: []const u8,
+                sha1: []const u8,
+                size: u64,
+                url: []const u8,
+            },
+        },
+        name: []const u8,
+        rules: ?[]Rule = null,
+    };
 
     arguments: struct {
         game: []Arg,
         jvm: []Arg,
     },
+    assetIndex: struct {
+        id:[]const u8,
+        sha1: []const u8,
+        size: u64,
+        totalSize: u64,
+        url: []const u8,
+    },
+    assets: []const u8,
+    complianceLevel: u8,
+    downloads: struct {
+        client: Download,
+        client_mappings: Download,
+        server: Download,
+        server_mappings: Download,
+    },
+    id: []const u8,
+    javaVersion: struct {
+        component: []const u8,
+        majorVersion: u8,
+    },
+    libraries: []Library,
+    logging: struct {
+        client: struct {
+            argument: []const u8,
+            file: struct {
+                id: []const u8,
+                sha1: []const u8,
+                size: u64,
+                url: []const u8,
+            },
+            type: []const u8, 
+        },
+    },
+    mainClass: []const u8,
+    minimumLauncherVersion: u8,
+    releaseTime: []const u8,
+    time: []const u8,
+    type: []const u8,
 };
 
-/// Minecraft launcher!
-pub fn main() !void {
-    var gpa = std.heap.GeneralPurposeAllocator(.{ .safety = false }){}; // TODO turn safety back on
-    defer _ = gpa.deinit();
-    const a = gpa.allocator();
-    var client = std.http.Client{ .allocator = a };
-    defer client.deinit();
-
-    const m_wrap = try download_json(&client, Manifest, Manifest.uri);
-    defer m_wrap.deinit();
-    const m = m_wrap.value;
-    std.log.info("release: {s} snapshot: {s}", .{ m.latest.release, m.latest.snapshot });
-
-    // Find the release version
-    const rvu = for (m.versions) |v| {
-        if (std.mem.eql(u8, v.id, m.latest.release)) {
-            break v.url;
-        }
-    } else {
-        return error.NoReleaseVersionFound;
-    };
-    std.log.info("found release version url {s}", .{rvu});
-    var rv_wrap = try download_json(&client, Version, rvu);
-    defer rv_wrap.deinit();
-    const rv = rv_wrap.value;
-    for (rv.arguments.game) |ga| {
-        std.log.info("game arg: {}", .{ga});
-    }
-    // Download the manifest for that
-
-    // std.mem.replace(comptime T: type, input: []const T, needle: []const T, replacement: []const T, output: []T)
-
-    // check the latest.release
-    // find that in the versions[] by key id
-    // get the download URL for that https://piston-meta.mojang.com/v1/packages/1f376e6cb981265af345076889f9ef325bb6b9e8/1.20.1.json
-
-    // get arguments.game and arguments.jvm ready to supply ...
-    // probably just use the system java version for now
-    //
-}
 
 /// Caller is responsible for calling deinit on the resulting Parsed struct.
 fn download_json(client: *std.http.Client, comptime T: type, url_maybe_https: []const u8) !std.json.Parsed(T) {
-- 
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