Initial connection working

.gitignore

@@ -0,0 +1,4 @@
+.zig-cache/
+csharp-reference/
+rust-reference/
+zig-out/

build.zig

@@ -0,0 +1,76 @@
+const std = @import("std");
+
+// Although this function looks imperative, note that its job is to
+// declaratively construct a build graph that will be executed by an external
+// runner.
+pub fn build(b: *std.Build) void {
+    // Standard target options allows the person running `zig build` to choose
+    // what target to build for. Here we do not override the defaults, which
+    // means any target is allowed, and the default is native. Other options
+    // for restricting supported target set are available.
+    
+    //const target = b.resolveTargetQuery(.{
+    //    .cpu_arch = .wasm32,
+    //    .os_tag = .freestanding,
+    //});
+    const target = b.standardTargetOptions(.{});
+
+    // Standard optimization options allow the person running `zig build` to select
+    // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall. Here we do not
+    // set a preferred release mode, allowing the user to decide how to optimize.
+    const optimize = b.standardOptimizeOption(.{});
+
+    const lib = b.addExecutable(.{
+        .name = "stdb-zig-helloworld",
+        .root_source_file = b.path("src/main.zig"),
+        .target = target,
+        .optimize = optimize,
+    });
+
+    lib.rdynamic = true;
+    lib.entry = .disabled;
+
+    lib.addIncludePath(b.path("src"));
+
+    // This declares intent for the executable to be installed into the
+    // standard location when the user invokes the "install" step (the default
+    // step when running `zig build`).
+    b.installArtifact(lib);
+
+    // This *creates* a Run step in the build graph, to be executed when another
+    // step is evaluated that depends on it. The next line below will establish
+    // such a dependency.
+    const run_cmd = b.addRunArtifact(lib);
+
+    // By making the run step depend on the install step, it will be run from the
+    // installation directory rather than directly from within the cache directory.
+    // This is not necessary, however, if the application depends on other installed
+    // files, this ensures they will be present and in the expected location.
+    run_cmd.step.dependOn(b.getInstallStep());
+
+    // This allows the user to pass arguments to the application in the build
+    // command itself, like this: `zig build run -- arg1 arg2 etc`
+    if (b.args) |args| {
+        run_cmd.addArgs(args);
+    }
+
+    // This creates a build step. It will be visible in the `zig build --help` menu,
+    // and can be selected like this: `zig build run`
+    // This will evaluate the `run` step rather than the default, which is "install".
+    const run_step = b.step("run", "Run the app");
+    run_step.dependOn(&run_cmd.step);
+
+    const exe_unit_tests = b.addTest(.{
+        .root_source_file = b.path("src/main.zig"),
+        .target = target,
+        .optimize = optimize,
+    });
+
+    const run_exe_unit_tests = b.addRunArtifact(exe_unit_tests);
+
+    // Similar to creating the run step earlier, this exposes a `test` step to
+    // the `zig build --help` menu, providing a way for the user to request
+    // running the unit tests.
+    const test_step = b.step("test", "Run unit tests");
+    test_step.dependOn(&run_exe_unit_tests.step);
+}

build.zig.zon

@@ -0,0 +1,72 @@
+.{
+    // This is the default name used by packages depending on this one. For
+    // example, when a user runs `zig fetch --save <url>`, this field is used
+    // as the key in the `dependencies` table. Although the user can choose a
+    // different name, most users will stick with this provided value.
+    //
+    // It is redundant to include "zig" in this name because it is already
+    // within the Zig package namespace.
+    .name = "spacetimedb-zig",
+
+    // This is a [Semantic Version](https://semver.org/).
+    // In a future version of Zig it will be used for package deduplication.
+    .version = "0.0.0",
+
+    // This field is optional.
+    // This is currently advisory only; Zig does not yet do anything
+    // with this value.
+    //.minimum_zig_version = "0.11.0",
+
+    // This field is optional.
+    // Each dependency must either provide a `url` and `hash`, or a `path`.
+    // `zig build --fetch` can be used to fetch all dependencies of a package, recursively.
+    // Once all dependencies are fetched, `zig build` no longer requires
+    // internet connectivity.
+    .dependencies = .{
+        // See `zig fetch --save <url>` for a command-line interface for adding dependencies.
+        //.example = .{
+        //    // When updating this field to a new URL, be sure to delete the corresponding
+        //    // `hash`, otherwise you are communicating that you expect to find the old hash at
+        //    // the new URL.
+        //    .url = "https://example.com/foo.tar.gz",
+        //
+        //    // This is computed from the file contents of the directory of files that is
+        //    // obtained after fetching `url` and applying the inclusion rules given by
+        //    // `paths`.
+        //    //
+        //    // This field is the source of truth; packages do not come from a `url`; they
+        //    // come from a `hash`. `url` is just one of many possible mirrors for how to
+        //    // obtain a package matching this `hash`.
+        //    //
+        //    // Uses the [multihash](https://multiformats.io/multihash/) format.
+        //    .hash = "...",
+        //
+        //    // When this is provided, the package is found in a directory relative to the
+        //    // build root. In this case the package's hash is irrelevant and therefore not
+        //    // computed. This field and `url` are mutually exclusive.
+        //    .path = "foo",
+        //
+        //    // When this is set to `true`, a package is declared to be lazily
+        //    // fetched. This makes the dependency only get fetched if it is
+        //    // actually used.
+        //    .lazy = false,
+        //},
+    },
+
+    // Specifies the set of files and directories that are included in this package.
+    // Only files and directories listed here are included in the `hash` that
+    // is computed for this package. Only files listed here will remain on disk
+    // when using the zig package manager. As a rule of thumb, one should list
+    // files required for compilation plus any license(s).
+    // Paths are relative to the build root. Use the empty string (`""`) to refer to
+    // the build root itself.
+    // A directory listed here means that all files within, recursively, are included.
+    .paths = .{
+        "build.zig",
+        "build.zig.zon",
+        "src",
+        // For example...
+        //"LICENSE",
+        //"README.md",
+    },
+}

src/main.zig

@@ -0,0 +1,472 @@
+const std = @import("std");
+
+//extern "spacetime_10.0"
+pub fn console_log(
+    level: u8,
+    target_ptr: [*c]const u8,
+    target_len: usize,
+    filename_ptr: [*c]const u8,
+    filename_len: usize,
+    line_number: u32,
+    message_ptr: [*c]const u8,
+    message_len: usize,
+) void {
+    _ = level;
+    _ = target_ptr;
+    _ = target_len;
+    _ = filename_ptr;
+    _ = filename_len;
+    _ = line_number;
+    _ = message_ptr;
+    _ = message_len;
+}
+
+const BytesSink = extern struct { inner: u32 };
+const BytesSource = extern struct { inner: u32 };
+
+//extern "spacetime_10.0"
+pub fn bytes_sink_write(sink: BytesSink, buffer_ptr: [*c]const u8, buffer_len_ptr: *usize) u16 {
+    _ = sink;
+    _ = buffer_ptr;
+    _ = buffer_len_ptr;
+    return 0;
+}
+
+const NO_SUCH_BYTES = 8;
+const NO_SPACE = 9;
+
+fn write_to_sink(sink: BytesSink, _buf: []const u8) void {
+    var buf: []const u8 = _buf;
+    while(true) {
+        const len: *usize = &buf.len;
+        switch(bytes_sink_write(sink, buf.ptr, len)) {
+            0 => {
+                // Set `buf` to remainder and bail if it's empty.
+                buf = buf[len.*..];
+                if(buf.len == 0) {
+                    break;
+                }
+            },
+            NO_SUCH_BYTES => @panic("invalid sink passed"),
+            NO_SPACE => @panic("no space left at sink"),
+            else => unreachable,
+        }
+    }
+}
+
+//pub const ReducerFn = fn(ReducerContext, []u8) ReducerResult;
+
+pub const SumTypeVariant = struct {
+    name: ?*[]u8,
+    algebraic_type: AlgebraicType,
+};
+
+pub const SumType = struct {
+    variants: []SumTypeVariant,
+};
+
+pub const ArrayType = struct {
+    /// The base type every element of the array has.
+    elem_ty: []AlgebraicType,
+};
+
+pub const AlgebraicType = union(enum) {
+    Ref: AlgebraicTypeRef,
+    Sum: SumType,
+    Product: ProductType,
+    Array: ArrayType,
+    String: []u8,
+    Bool: bool,
+    I8: i8,
+    U8: u8,
+    I16: i16,
+    U16: u16,
+    I32: i32,
+    U32: u32,
+    I64: i64,
+    U64: u64,
+    I128: i128,
+    U128: u128,
+    I256: i256,
+    U256: u256,
+    F32: f32,
+    F64: f64,
+};
+
+pub const Typespace = struct {
+    types: []AlgebraicType,
+};
+
+pub const RawIdentifier = *[*c]u8;
+
+pub const AlgebraicTypeRef = struct {
+    inner: u32,
+};
+
+pub const RawIndexAlgorithm = union {
+    BTree: []u16,
+    Hash: []u16,
+    Direct: u16,
+};
+
+pub const RawIndexDefV9 = struct {
+    name: ?[]u8,
+    accessor_name: ?[]u8,
+    algorithm: RawIndexAlgorithm,
+};
+
+pub const RawUniqueConstraintDataV9 = union {
+    Columns: u16,
+};
+
+pub const RawConstraintDataV9 = union {
+    unique: RawUniqueConstraintDataV9,
+};
+
+pub const RawConstraintDefV9 = struct {
+    name: ?[]u8,
+    data: RawConstraintDataV9
+};
+
+pub const RawSequenceDefV9 = struct {
+    Name: ?[]u8,
+    Column: u16,
+    Start: ?i128,
+    MinValue: ?i128,
+    MaxValue: ?i128,
+    Increment: i128
+};
+
+pub const RawScheduleDefV9 = struct {
+    Name: ?[]u8,
+    ReducerName: []u8,
+    ScheduledAtColumn: u16
+};
+
+pub const TableType = enum {
+    System,
+    User,
+};
+
+pub const TableAccess = enum {
+    Public,
+    Private,
+};
+
+pub const RawTableDefV9 = struct {
+    name: RawIdentifier,
+    product_type_ref: AlgebraicTypeRef,
+    primary_key: []u16,
+    indexes: []RawIndexDefV9,
+    constraints: []RawConstraintDefV9,
+    sequences: []RawSequenceDefV9,
+    schedule: ?RawScheduleDefV9,
+    table_type: TableType,
+    table_access: TableAccess,
+};
+
+pub const ProductTypeElement = struct {
+    name: ?*[]u8,
+    algebraic_type: AlgebraicType,
+};
+
+pub const ProductType = struct {
+    elements: []ProductTypeElement,
+};
+
+pub const Lifecycle = enum {
+    Init,
+    OnConnect,
+    OnDisconnect,
+};
+
+pub const RawReducerDefV9 = struct{
+    name: RawIdentifier,
+    params: ProductType,
+    lifecycle: ?Lifecycle,
+};
+
+pub const RawScopedTypeNameV9 = struct {
+    scope: [][]u8,
+    name: []u8,
+};
+
+pub const RawTypeDefV9 = struct {
+    name: RawScopedTypeNameV9,
+    ty: AlgebraicTypeRef,
+    custom_ordering: bool,
+};
+
+pub const RawMiscModuleExportV9 = enum {};
+
+pub const RawSql = *[*c]u8;
+
+pub const RawRowLevelSecurityDefV9 = struct {
+    sql: RawSql,
+};
+
+pub const RawModuleDefV9 = struct {
+    typespace: Typespace,
+    tables: []RawTableDefV9,
+    reducers: []RawReducerDefV9,
+    types: []RawTypeDefV9,
+    misc_exports: []RawMiscModuleExportV9,
+    row_level_security: []RawRowLevelSecurityDefV9,
+};
+
+// V9(
+//     RawModuleDefV9 {
+//         typespace: Typespace [
+//             Product(
+//                 ProductType {
+//                     "name": String,
+//                 },
+//             ),
+//         ],
+//         tables: [
+//             RawTableDefV9 {
+//                 name: "person",
+//                 product_type_ref: AlgebraicTypeRef(
+//                     0,
+//                 ),
+//                 primary_key: [],
+//                 indexes: [],
+//                 constraints: [],
+//                 sequences: [],
+//                 schedule: None,
+//                 table_type: User,
+//                 table_access: Private,
+//             },
+//         ],
+//         reducers: [
+//             RawReducerDefV9 {
+//                 name: "add",
+//                 params: ProductType {
+//                     "name": String,
+//                 },
+//                 lifecycle: None,
+//             },
+//             RawReducerDefV9 {
+//                 name: "identity_connected",
+//                 params: ProductType {},
+//                 lifecycle: Some(
+//                     OnConnect,
+//                 ),
+//             },
+//             RawReducerDefV9 {
+//                 name: "identity_disconnected",
+//                 params: ProductType {},
+//                 lifecycle: Some(
+//                     OnDisconnect,
+//                 ),
+//             },
+//             RawReducerDefV9 {
+//                 name: "init",
+//                 params: ProductType {},
+//                 lifecycle: Some(
+//                     Init,
+//                 ),
+//             },
+//             RawReducerDefV9 {
+//                 name: "say_hello",
+//                 params: ProductType {},
+//                 lifecycle: None,
+//             },
+//         ],
+//         types: [
+//             RawTypeDefV9 {
+//                 name: "Person",
+//                 ty: AlgebraicTypeRef(
+//                     0,
+//                 ),
+//                 custom_ordering: true,
+//             },
+//         ],
+//         misc_exports: [],
+//         row_level_security: [],
+//     },
+// )
+
+const bytes = [_]u8{
+    1, //VP9 
+    1, 0, 0, 0, //Typespace.types.len
+    2, //Typespace.types[0].tag(Product)
+    1, 0, 0, 0, //Typespace.types[0].tag(Product).elements.len
+    0, // optional?
+    4, 0, 0, 0, //Typespace.types[0].tag(Product).elements[0].name.len
+    110, 97, 109, 101,  //Typespace.types[0].tag(Product).elements[0].name[0..4] "name"
+    4, //Typespace.types[0].tag(Product).elements[0].algebraic_type(String)
+    1, 0, 0, 0, //Typespace.types[0].tag(Product).elements[0].algebraic_type(String).len
+    
+    6, 0, 0, 0, //tables[0].name.len
+    112, 101, 114, 115, 111, 110, //tables[0].name "person"
+    0, 0, 0, 0,
+    0, 0, 0, 0,
+    0, 0, 0, 0,
+    0, 0, 0, 0,
+    0, 0, 0, 0,
+    1,
+    1,
+    1,
+    5, 0, 0, 0,
+    
+    3, 0, 0, 0,
+    97, 100, 100, 
+    
+    1, 0, 0, 0,
+    0,
+    
+    4, 0, 0, 0,
+    110, 97, 109, 101,
+    4,
+    1,
+    18, 0, 0, 0,
+    105, 100, 101, 110, 116, 105, 116, 121, 95, 99, 111, 110, 110, 101, 99, 116, 101, 100, 
+    
+    0, 0, 0, 0,
+    0,
+    1,
+    21, 0, 0, 0,
+    105, 100, 101, 110, 116, 105, 116, 121, 95, 100, 105, 115, 99, 111, 110, 110, 101, 99, 116, 101, 100,
+    
+    0, 0, 0, 0,
+    0,
+    2,
+    4, 0, 0, 0,
+    105, 110, 105, 116,
+    0, 0, 0, 0,
+    0,
+    0,
+    9, 0, 0, 0,
+    115, 97, 121, 95, 104, 101, 108, 108, 111,
+    0, 0, 0, 0,
+    1,
+    1,
+    0, 0, 0, 0,
+    
+    0, 0, 0,
+    
+    6, 0, 0, 0, 
+    80, 101, 114, 115, 111, 110,
+    
+    0, 0, 0, 0,
+    1, 0, 0, 0,
+    0, 0, 0, 0, 
+    0
+};
+
+pub fn print(comptime fmt: []const u8) void {
+    console_log(0, null, 0, null, 0, 0, fmt.ptr, fmt.len);
+}
+
+pub fn module_write(val: anytype) void {
+    switch(@TypeOf(val)) {
+        RawModuleDefV9 => {
+            std.debug.print("{{ 1 }},\n", .{});
+            module_write(val.typespace);
+        },
+        Typespace => {
+            std.debug.print("{any},\n", .{std.mem.toBytes(@as(u32, @intCast(val.types.len)))});
+            for(val.types) |_type| {
+                module_write(_type);
+            }
+        },
+        AlgebraicType => {
+            switch(val) {
+                AlgebraicType.String => |string| {
+                    std.debug.print("{any},\n", .{string});
+                },
+                AlgebraicType.Product => |product| {
+                    module_write(product);
+                },
+                else => std.debug.print("{any},\n", .{val}),
+            }
+        },
+        ProductType => {
+            std.debug.print("{any},\n", .{std.mem.toBytes(@as(u32, @intCast(val.elements.len)))});
+            for(val.elements) |element| {
+                module_write(element);
+            }
+
+        },
+        ProductTypeElement => {
+            if(val.name == null) {
+                std.debug.print("{{ 1 }},\n", .{});
+            } else {
+                std.debug.print("{{ 0 }},\n", .{});
+                std.debug.print("{any},\n", .{val.name});
+            }
+            module_write(val.algebraic_type);
+        },
+        else => |v| @compileLog(v, val),
+    }
+}
+
+test {
+    const moduleDef: RawModuleDefV9 = std.mem.zeroes(RawModuleDefV9);
+    module_write(moduleDef);
+}
+
+export fn __describe_module__(description: BytesSink) void {
+    console_log(0, null, 0, null, 0, 0, "Hello from Zig!", 15);
+    
+    const moduleDef: RawModuleDefV9 = std.mem.zeroes(RawModuleDefV9);
+    //moduleDef.
+
+    // We need this explicit cast here to make `ToBytes` understand the types correctly.
+    //RawModuleDef versioned = new RawModuleDef.V9(moduleDef);
+    //var moduleBytes = IStructuralReadWrite.ToBytes(new RawModuleDef.BSATN(), versioned);
+    //description.Write(moduleBytes);
+    module_write(moduleDef);
+
+
+    write_to_sink(description, &bytes);
+}
+
+export fn __call_reducer__(
+    id: usize,
+    sender_0: u64,
+    sender_1: u64,
+    sender_2: u64,
+    sender_3: u64,
+    conn_id_0: u64,
+    conn_id_1: u64,
+    timestamp: u64,
+    args: BytesSource,
+    err: BytesSink,
+) i16 {
+    _ = id;
+    _ = sender_0;
+    _ = sender_1;
+    _ = sender_2;
+    _ = sender_3;
+    _ = conn_id_0;
+    _ = conn_id_1;
+    _ = timestamp;
+    _ = args;
+    _ = err;
+
+    return 0;
+}
+
+const ReducerContext = anyopaque;
+
+var module: RawModuleDefV9 = .{};
+
+const ReducerFn = fn(*ReducerContext) void;
+
+comptime {
+    for(@typeInfo(@This()).@"struct".decls) |decl| {
+        const field = @field(@This(), decl.name);
+        if(@typeInfo(@TypeOf(field)) != .@"fn") continue;
+        if(@TypeOf(field) != ReducerFn) continue;
+        
+        @compileLog(.{field});
+    }
+}
+
+pub fn init(_ctx: *ReducerContext) void {
+    // Called when the module is initially published
+    _ = _ctx;
+    console_log(0, null, 0, null, 0, 0, "Hello, init!", 12);
+}