feat: add c2pa-types package with automatic type generation

Author: emensch

Cargo.lock

@@ -3,6 +3,7 @@
 resolver = '2'
 members = [
 	'packages/c2pa-wasm',
+	'packages/c2pa-types',
 ]
 
 [profile.release]

Cargo.toml

@@ -0,0 +1,2 @@
+schemas
+types

packages/c2pa-types/.gitignore

@@ -0,0 +1,9 @@
+[package]
+name = "c2pa-types"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+c2pa = { version = "0.58.0", features = ["pdf", "rust_native_crypto", "json_schema"], default-features = false }
+schemars = "0.8.21"
+serde_json = "1.0.143"

packages/c2pa-types/Cargo.toml

@@ -0,0 +1,15 @@
+/**
+ * Copyright 2025 Adobe
+ * All Rights Reserved.
+ *
+ * NOTICE: Adobe permits you to use, modify, and distribute this file in
+ * accordance with the terms of the Adobe license agreement accompanying
+ * it.
+ */
+
+import type { Reader } from './types/ManifestStore.js';
+
+// Renames the auto-generated "Reader" type to the more appropriate "ManifestStore"
+export interface ManifestStore extends Reader {}
+
+export type { Manifest } from './types/ManifestStore.js';

packages/c2pa-types/index.d.ts

@@ -0,0 +1,17 @@
+{
+  "name": "@contentauth/c2pa-types",
+  "description": "Typescript types generated from c2pa-rs",
+  "type": "module",
+  "version": "0.1.1",
+  "types": "index.d.ts",
+  "scripts": {
+    "test": "echo \"No tests to run\" && exit 0",
+    "build": "pnpm clean && json2ts -i schemas/ -o types/",
+    "clean": "rimraf types"
+  },
+  "files": ["index.d.ts", "types/**/*"],
+  "dependencies": {
+    "json-schema-to-typescript": "^15.0.4",
+    "rimraf": "^6.0.1"
+  }
+}

packages/c2pa-types/package.json

@@ -0,0 +1,26 @@
+{
+  "name": "c2pa-types",
+  "$schema": "../../node_modules/nx/schemas/project-schema.json",
+  "tags": ["lib"],
+  "projectType": "library",
+  "sourceRoot": "packages/c2pa-types/src",
+  "targets": {
+    "build": {
+      "cache": true,
+      "inputs": [
+        "{projectRoot}/**/*",
+        "!{projectRoot}/schemas/**/*",
+        "!{projectRoot}/types/**/*"
+      ],
+      "executor": "nx:run-commands",
+      "options": {
+        "commands": [
+          "cargo run",
+          "pnpm build"
+        ],
+        "parallel": false,
+        "cwd": "{projectRoot}"
+      }
+    }
+  }
+}

packages/c2pa-types/project.json

@@ -0,0 +1,20 @@
+use std::{fs, path::Path};
+
+use c2pa::Reader;
+use schemars::{schema::RootSchema, schema_for};
+
+fn main() {
+    let output_dir = Path::new("./schemas");
+    fs::remove_dir_all(output_dir).expect("Could not clear existing schema directory");
+    fs::create_dir_all(output_dir).expect("Could not create schema directory");
+
+    write_schema(&schema_for!(Reader), &"ManifestStore", output_dir);
+}
+
+fn write_schema(schema: &RootSchema, name: &str, output_dir: &Path) {
+    println!("Exporting JSON schema for {name}");
+    let output_path = output_dir.join(format!("{name}.json"));
+    let output = serde_json::to_string_pretty(schema).expect("Failed to serialize schema");
+    fs::write(&output_path, output).expect("Unable to write schema");
+    println!("Wrote schema to {}", output_path.display());
+}

packages/c2pa-types/src/main.rs

@@ -30,7 +30,8 @@
     }
   },
   "dependencies": {
-    "@contentauth/c2pa-wasm": "workspace:*"
+    "@contentauth/c2pa-wasm": "workspace:*",
+    "@contentauth/c2pa-types": "workspace:*"
   },
   "devDependencies": {
     "@playwright/test": "^1.55.0",

packages/c2pa-web/package.json

@@ -8,8 +8,13 @@
  */
 
 export * from './lib/c2pa.js';
+
 export {
   isSupportedReaderFormat,
   READER_SUPPORTED_FORMATS,
 } from './lib/supportedFormats.js';
+
 export { type Settings } from './lib/settings.js';
+
+// Re-export types from c2pa-types for convenience.
+export type * from '@contentauth/c2pa-types';