add zig example

examples/ziggity/.gitignore

@@ -0,0 +1,2 @@
+zig-out
+zig-cache

examples/ziggity/build.zig

@@ -0,0 +1,26 @@
+const std = @import("std");
+
+// if you're not using WASI, change this to .freestanding
+const BUILD_TARGET_OS = .wasi;
+
+pub fn build(b: *std.Build) !void {
+    const optimize = b.standardOptimizeOption(.{});
+    const target = b.standardTargetOptions(.{
+        .default_target = .{ .abi = .musl, .os_tag = BUILD_TARGET_OS, .cpu_arch = .wasm32 },
+    });
+    const pdk_module = b.dependency("extism-pdk", .{ .target = target, .optimize = optimize }).module("extism-pdk");
+
+    var plugin = b.addExecutable(.{
+        .name = "plugin",
+        .root_source_file = b.path("src/pdk.zig"),
+        .target = target,
+        .optimize = optimize,
+    });
+    if (BUILD_TARGET_OS == .wasi) {
+        plugin.wasi_exec_model = .reactor;
+    }
+    plugin.rdynamic = true;
+    plugin.entry = .disabled; // or add an empty `pub fn main() void {}` to your code
+    plugin.root_module.addImport("extism-pdk", pdk_module);
+    b.installArtifact(plugin);
+}

examples/ziggity/build.zig.zon

@@ -0,0 +1,36 @@
+.{
+    .name = "ziggity",
+    // 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 = .{
+        .@"extism-pdk" = .{
+            .url = "https://github.com/extism/zig-pdk/archive/refs/tags/v1.1.0.tar.gz",
+            .hash = "1220e0aae36b81e1b99f86717dc67101fe0dcdc57c0ac05e1100aefb291f6dc4f7e0",
+        },
+    },
+    .paths = .{
+        // This makes *all* files, recursively, included in this package. It is generally
+        // better to explicitly list the files and directories instead, to insure that
+        // fetching from tarballs, file system paths, and version control all result
+        // in the same contents hash.
+        "",
+        // For example...
+        //"build.zig",
+        //"build.zig.zon",
+        //"src",
+        //"LICENSE",
+        //"README.md",
+    },
+}

examples/ziggity/src/main.zig

@@ -0,0 +1,21 @@
+const std = @import("std");
+const schema = @import("schema.zig");
+const Host = schema.Host;
+
+///
+/// It takes IncomingEvent as input (An incoming event)
+pub fn handle(input: schema.IncomingEvent) !void {
+    if (!std.mem.eql(u8, "content", input.kind)) {
+        return;
+    }
+
+    _ = try Host.react(schema.OutgoingReaction{
+        .messageId = input.message.id,
+        .with = "🦎",
+    });
+
+    _ = try Host.react(schema.OutgoingReaction{
+        .messageId = input.message.id,
+        .with = "⚡️",
+    });
+}

examples/ziggity/src/pdk.zig

@@ -0,0 +1,38 @@
+// THIS FILE WAS GENERATED BY `xtp-zig-bindgen`. DO NOT EDIT.
+const std = @import("std");
+const extism = @import("extism-pdk");
+
+const user = @import("main.zig");
+const schema = @import("schema.zig");
+
+const _plugin = extism.Plugin.init(std.heap.wasm_allocator);
+
+const ERR_PRINTING_MSG: []const u8 = "std.fmt.allocPrint failed when formatting plugin error";
+
+export fn handle() i32 {
+    // Get the input data
+    // in JSON
+    const json_input = _plugin.getJsonOpt(schema.IncomingEvent, .{}) catch |err| {
+        const msg = std.fmt.allocPrint(_plugin.allocator, "{}", .{err}) catch ERR_PRINTING_MSG;
+        _plugin.setError(msg);
+        return -1;
+    };
+    defer json_input.deinit();
+
+    var input = json_input.value();
+    // decode all the inner buffer fields from base64 (may be no-op)
+    input = (input.XXX__decodeBase64Fields() catch |err| {
+        const msg = std.fmt.allocPrint(_plugin.allocator, "{}", .{err}) catch ERR_PRINTING_MSG;
+        _plugin.setError(msg);
+        return -1;
+    }).*;
+
+    // Call the implementation function
+    user.handle(input) catch |err| {
+        const msg = std.fmt.allocPrint(_plugin.allocator, "{}", .{err}) catch ERR_PRINTING_MSG;
+        _plugin.setError(msg);
+        return -1;
+    };
+
+    return 0;
+}