feat: event aggregator (#6218)

What:
- Event Aggregator Util
- Preparation for normalizing event in a new format (backward compatible with the current format)
- GQL Schema to joiner config and some Entities configured
- Link modules emmiting events

packages/modules-sdk/src/medusa-module.ts

@@ -69,7 +69,8 @@ export type LinkModuleBootstrapOptions = {
 }
 
 export class MedusaModule {
-  private static instances_: Map<string, any> = new Map()
+  private static instances_: Map<string, { [key: string]: IModuleService }> =
+    new Map()
   private static modules_: Map<string, ModuleAlias[]> = new Map()
   private static loading_: Map<string, Promise<any>> = new Map()
   private static joinerConfig_: Map<string, ModuleJoinerConfig> = new Map()
@@ -87,12 +88,15 @@ export class MedusaModule {
     })
   }
 
-  public static onApplicationStart(): void {
+  public static onApplicationStart(onApplicationStartCb?: () => void): void {
     for (const instances of MedusaModule.instances_.values()) {
       for (const instance of Object.values(instances) as IModuleService[]) {
         if (instance?.__hooks) {
           instance.__hooks?.onApplicationStart
             ?.bind(instance)()
+            .then(() => {
+              onApplicationStartCb?.()
+            })
             .catch(() => {
               // The module should handle this and log it
               return void 0
@@ -217,7 +221,9 @@ export class MedusaModule {
     )
 
     if (MedusaModule.instances_.has(hashKey)) {
-      return MedusaModule.instances_.get(hashKey)
+      return MedusaModule.instances_.get(hashKey)! as {
+        [key: string]: T
+      }
     }
 
     if (MedusaModule.loading_.has(hashKey)) {
@@ -249,7 +255,12 @@ export class MedusaModule {
       }
     }
 
-    const container = createMedusaContainer({}, sharedContainer)
+    // TODO: Only do that while legacy modules sharing the manager exists then remove the ternary in favor of createMedusaContainer({}, globalContainer)
+    const container =
+      modDeclaration.scope === MODULE_SCOPE.INTERNAL &&
+      modDeclaration.resources === MODULE_RESOURCE_TYPE.SHARED
+        ? sharedContainer ?? createMedusaContainer()
+        : createMedusaContainer({}, sharedContainer)
 
     if (injectedDependencies) {
       for (const service in injectedDependencies) {