Move body parsing to new fn

src/main/main.zig

@@ -49,11 +49,21 @@ fn respondJson(ctx: *http.server.Context, status: http.Status, value: anytype, a
     try stream.finish();
 }
 
-fn createNote(srv: *RequestServer, ctx: *http.server.Context, _: RouteArgs) !void {
-    const body = ctx.request.body orelse return respondJson(ctx, .bad_request, .{ .@"error" = "'content' cannot be empty" }, srv.alloc);
+fn parseRequestBody(comptime T: type, ctx: *http.server.Context, alloc: std.mem.Allocator) !T {
+    const body = ctx.request.body orelse return error.BodyRequired;
     var tokens = std.json.TokenStream.init(body);
-    const info = try std.json.parse(api.CreateInfo(models.Note), &tokens, .{ .allocator = srv.alloc });
-    defer std.json.parseFree(api.CreateInfo(models.Note), info, .{ .allocator = srv.alloc });
+    const parsed = try std.json.parse(T, &tokens, .{ .allocator = alloc });
+
+    return parsed;
+}
+
+fn freeRequestBody(value: anytype, alloc: std.mem.Allocator) void {
+    std.json.parseFree(@TypeOf(value), value, .{ .allocator = alloc });
+}
+
+fn createNote(srv: *RequestServer, ctx: *http.server.Context, _: RouteArgs) !void {
+    const info = try parseRequestBody(api.CreateInfo(models.Note), ctx, srv.alloc);
+    defer freeRequestBody(info, srv.alloc);
 
     const note = try srv.api.createNote(info);