Add support for app defined services

lib/src/service/ServiceProvider.ts

@@ -0,0 +1,6 @@
+import AppClass from '../lifecycle/AppClass.ts'
+export { Service } from '../../../di/src/decorator/Service.ts'
+
+export class ServiceProvider extends AppClass {
+
+}

lib/src/unit/Services.ts

@@ -0,0 +1,18 @@
+import {InstantiableCanonical} from './InstantiableCanonical.ts'
+import {ServiceProvider} from '../service/ServiceProvider.ts'
+import {CanonicalDefinition} from './Canonical.ts'
+
+export default class Services extends InstantiableCanonical<ServiceProvider> {
+    protected base_path = './app/services'
+    protected canonical_item = 'service'
+    protected suffix = '.service.ts'
+
+    public async init_canonical_item(def: CanonicalDefinition) {
+        const item = await super.init_canonical_item(def)
+        if ( !(item instanceof ServiceProvider) ) {
+            throw new TypeError(`Invalid service provider definition: ${def.original_name}. Service providers must extend from Daton's base ServiceProvider class.`)
+        }
+
+        return item
+    }
+}