add metadata function
This blows up the number of parameters on generateComplexTypeFor at least this is a private function, but still kinda messay
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03ef89a362
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@ -126,7 +126,7 @@ fn generateServices(allocator: *std.mem.Allocator, comptime terminator: []const
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// Operations
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for (service.shape.service.operations) |op|
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try generateOperation(allocator, shapes.get(op).?, shapes, writer);
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try generateOperation(allocator, shapes.get(op).?, shapes, writer, constant_name);
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// End service
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_ = try writer.write("} = .{}" ++ terminator ++ " // end of service: ");
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@ -134,24 +134,31 @@ fn generateServices(allocator: *std.mem.Allocator, comptime terminator: []const
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}
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return constant_names.toOwnedSlice();
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}
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fn generateOperation(allocator: *std.mem.Allocator, operation: smithy.ShapeInfo, shapes: anytype, writer: anytype) !void {
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fn generateOperation(allocator: *std.mem.Allocator, operation: smithy.ShapeInfo, shapes: anytype, writer: anytype, service: []const u8) !void {
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const snake_case_name = try snake.fromPascalCase(allocator, operation.name);
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defer allocator.free(snake_case_name);
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comptime const prefix = " ";
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var type_stack = std.ArrayList(*const smithy.ShapeInfo).init(allocator);
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defer type_stack.deinit();
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// indent should start at 4 spaces here
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try writer.print(" {s}: struct ", .{snake_case_name});
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const operation_name = avoidReserved(snake_case_name);
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try writer.print(" {s}: struct ", .{operation_name});
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_ = try writer.write("{\n");
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try writer.print(" action_name: []const u8 = \"{s}\",\n", .{operation.name});
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_ = try writer.write(" Request: type = ");
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if (operation.shape.operation.input) |member| {
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try generateTypeFor(allocator, member, shapes, writer, " ", false, &type_stack);
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} else _ = try writer.write("struct {}"); // we want to maintain consistency with other ops
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try generateTypeFor(allocator, member, shapes, writer, prefix, false, &type_stack, false);
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_ = try writer.write("\n");
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try generateMetadataFunction(service, operation_name, prefix, writer);
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} else {
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_ = try writer.write("struct {\n");
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try generateMetadataFunction(service, operation_name, prefix, writer);
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}
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_ = try writer.write(",\n");
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_ = try writer.write(" Response: type = ");
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if (operation.shape.operation.output) |member| {
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try generateTypeFor(allocator, member, shapes, writer, " ", true, &type_stack);
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try generateTypeFor(allocator, member, shapes, writer, " ", true, &type_stack, true);
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} else _ = try writer.write("struct {}"); // we want to maintain consistency with other ops
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_ = try writer.write(",\n");
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@ -166,6 +173,19 @@ fn generateOperation(allocator: *std.mem.Allocator, operation: smithy.ShapeInfo,
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_ = try writer.write(" } = .{},\n");
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}
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fn generateMetadataFunction(service: []const u8, operation_name: []const u8, comptime prefix: []const u8, writer: anytype) !void {
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// TODO: Shove these lines in here, and also the else portion
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// pub fn metaInfo(self: @This()) struct { service: @TypeOf(sts), action: @TypeOf(sts.get_caller_identity) } {
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// return .{ .service = sts, .action = sts.get_caller_identity };
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// }
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// We want to add a short "get my parents" function into the response
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try writer.print("{s} ", .{prefix});
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_ = try writer.write("pub fn metaInfo(self: @This()) struct { ");
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try writer.print("service: @TypeOf({s}), action: @TypeOf({s}.{s})", .{ service, service, operation_name });
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_ = try writer.write(" } {\n" ++ prefix ++ " return .{ ");
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try writer.print(".service = {s}, .action = {s}.{s}", .{ service, service, operation_name });
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_ = try writer.write(" };\n" ++ prefix ++ " }\n" ++ prefix ++ "}");
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}
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fn getErrorName(err_name: []const u8) []const u8 {
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if (endsWith("Exception", err_name))
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return err_name[0 .. err_name.len - "Exception".len];
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@ -180,7 +200,7 @@ fn endsWith(item: []const u8, str: []const u8) bool {
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return std.mem.eql(u8, item, str[str.len - item.len ..]);
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}
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/// return type is anyerror!void as this is a recursive function, so the compiler cannot properly infer error types
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fn generateTypeFor(allocator: *std.mem.Allocator, shape_id: []const u8, shapes: anytype, writer: anytype, prefix: []const u8, all_required: bool, type_stack: anytype) anyerror!void {
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fn generateTypeFor(allocator: *std.mem.Allocator, shape_id: []const u8, shapes: anytype, writer: anytype, prefix: []const u8, all_required: bool, type_stack: anytype, end_structure: bool) anyerror!void {
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if (shapes.get(shape_id) == null) {
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std.debug.print("Shape ID not found. This is most likely a bug. Shape ID: {s}\n", .{shape_id});
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return error.InvalidType;
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@ -213,6 +233,7 @@ fn generateTypeFor(allocator: *std.mem.Allocator, shape_id: []const u8, shapes:
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// type to properly reference. Realistically, AWS or the service
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// must be blocking deep recursion somewhere or this would be a great
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// DOS attack
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try generateSimpleTypeFor("nothing", "[]const u8", writer, all_required);
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std.log.warn("Type cycle detected, limiting depth. Type: {s}", .{shape_id});
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// std.log.info(" Type stack:\n", .{});
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// for (type_stack.items) |i|
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@ -221,17 +242,29 @@ fn generateTypeFor(allocator: *std.mem.Allocator, shape_id: []const u8, shapes:
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}
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try type_stack.append(&shape_info);
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switch (shape) {
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.structure => |s| try generateComplexTypeFor(allocator, shape.structure.members, "struct", shapes, writer, prefix, all_required, type_stack),
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.uniontype => |s| try generateComplexTypeFor(allocator, shape.uniontype.members, "union", shapes, writer, prefix, all_required, type_stack),
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.structure => |s| {
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try generateComplexTypeFor(allocator, shape.structure.members, "struct", shapes, writer, prefix, all_required, type_stack);
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if (end_structure) {
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// epilog
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try writer.print("{s}", .{prefix});
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_ = try writer.write("}");
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}
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},
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.uniontype => |s| {
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try generateComplexTypeFor(allocator, shape.uniontype.members, "union", shapes, writer, prefix, all_required, type_stack);
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// epilog
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try writer.print("{s}", .{prefix});
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_ = try writer.write("}");
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},
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.string => |s| try generateSimpleTypeFor(s, "[]const u8", writer, all_required),
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.integer => |s| try generateSimpleTypeFor(s, "i64", writer, all_required),
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.list => |s| {
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_ = try writer.write("[]");
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try generateTypeFor(allocator, shape.list.member_target, shapes, writer, prefix, all_required, type_stack);
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try generateTypeFor(allocator, shape.list.member_target, shapes, writer, prefix, all_required, type_stack, true);
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},
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.set => |s| {
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_ = try writer.write("[]");
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try generateTypeFor(allocator, shape.set.member_target, shapes, writer, prefix, all_required, type_stack);
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try generateTypeFor(allocator, shape.set.member_target, shapes, writer, prefix, all_required, type_stack, true);
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},
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.timestamp => |s| try generateSimpleTypeFor(s, "i64", writer, all_required),
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.blob => |s| try generateSimpleTypeFor(s, "[]const u8", writer, all_required),
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@ -245,12 +278,12 @@ fn generateTypeFor(allocator: *std.mem.Allocator, shape_id: []const u8, shapes:
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defer allocator.free(new_prefix);
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try writer.print("{s} key: ", .{prefix});
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if (!all_required) try writeOptional(shape.map.traits, writer, null);
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try generateTypeFor(allocator, shape.map.key, shapes, writer, prefix, all_required, type_stack);
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try generateTypeFor(allocator, shape.map.key, shapes, writer, prefix, all_required, type_stack, true);
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if (!all_required) try writeOptional(shape.map.traits, writer, " = null");
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_ = try writer.write(",\n");
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try writer.print("{s} value: ", .{prefix});
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if (!all_required) try writeOptional(shape.map.traits, writer, null);
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try generateTypeFor(allocator, shape.map.key, shapes, writer, prefix, all_required, type_stack);
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try generateTypeFor(allocator, shape.map.key, shapes, writer, prefix, all_required, type_stack, true);
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if (!all_required) try writeOptional(shape.map.traits, writer, " = null");
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_ = try writer.write(",\n");
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_ = try writer.write(prefix);
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@ -278,16 +311,13 @@ fn generateComplexTypeFor(allocator: *std.mem.Allocator, members: []smithy.TypeM
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defer allocator.free(new_prefix);
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const snake_case_member = try snake.fromPascalCase(allocator, member.name);
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defer allocator.free(snake_case_member);
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try writer.print("{s} {s}: ", .{ prefix, snake_case_member });
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try writer.print("{s} {s}: ", .{ prefix, avoidReserved(snake_case_member) });
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if (!all_required) try writeOptional(member.traits, writer, null);
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try generateTypeFor(allocator, member.target, shapes, writer, new_prefix, all_required, type_stack);
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if (!all_required) try writeOptional(member.traits, writer, " = null");
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try generateTypeFor(allocator, member.target, shapes, writer, new_prefix, all_required, type_stack, true);
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if (!all_required and !std.mem.eql(u8, "union", type_type_name))
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try writeOptional(member.traits, writer, " = null");
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_ = try writer.write(",\n");
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}
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// epilog
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try writer.print("{s}", .{prefix});
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_ = try writer.write("}");
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}
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fn writeOptional(traits: ?[]smithy.Trait, writer: anytype, value: ?[]const u8) !void {
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@ -299,11 +329,19 @@ fn writeOptional(traits: ?[]smithy.Trait, writer: anytype, value: ?[]const u8) !
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// not required
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if (value) |v| {
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_ = try writer.write(v);
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} else
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_ = try writer.write("?");
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} else _ = try writer.write("?");
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}
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fn camelCase(allocator: *std.mem.Allocator, name: []const u8) ![]const u8 {
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const first_letter = name[0] + ('a' - 'A');
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return try std.fmt.allocPrint(allocator, "{c}{s}", .{ first_letter, name[1..] });
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}
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fn avoidReserved(snake_name: []const u8) []const u8 {
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if (std.mem.eql(u8, snake_name, "error")) return "@\"error\"";
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if (std.mem.eql(u8, snake_name, "return")) return "@\"return\"";
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if (std.mem.eql(u8, snake_name, "not")) return "@\"not\"";
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if (std.mem.eql(u8, snake_name, "and")) return "@\"and\"";
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if (std.mem.eql(u8, snake_name, "or")) return "@\"or\"";
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if (std.mem.eql(u8, snake_name, "test")) return "@\"test\"";
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if (std.mem.eql(u8, snake_name, "null")) return "@\"null\"";
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return snake_name;
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}
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