Initial

resources/app/common/packages/base-module.mjs

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+import BasePackage from "./base-package.mjs";
+import * as fields from "../data/fields.mjs";
+import AdditionalTypesField from "./sub-types.mjs";
+
+/**
+ * The data schema used to define Module manifest files.
+ * Extends the basic PackageData schema with some additional module-specific fields.
+ * @property {boolean} [coreTranslation]         Does this module provide a translation for the core software?
+ * @property {boolean} [library]                 A library module provides no user-facing functionality and is solely
+ *                                               for use by other modules. Loaded before any system or module scripts.
+ * @property {Record<string, string[]>} [documentTypes]  Additional document subtypes provided by this module.
+ */
+export default class BaseModule extends BasePackage {
+
+  /** @inheritDoc */
+  static defineSchema() {
+    const parentSchema = super.defineSchema();
+    return Object.assign({}, parentSchema, {
+      coreTranslation: new fields.BooleanField(),
+      library: new fields.BooleanField(),
+      documentTypes: new AdditionalTypesField()
+    });
+  }
+
+  /** @override */
+  static type = "module";
+
+  /**
+   * The default icon used for this type of Package.
+   * @type {string}
+   */
+  static icon = "fa-plug";
+}