From 2b9f98895eaca255e01278674b11cd7cb69b388f Mon Sep 17 00:00:00 2001
From: Philip Korsholm <88927411+pKorsholm@users.noreply.github.com>
Date: Wed, 17 Jan 2024 11:46:44 +0100
Subject: [PATCH] Feat(modules-sdk): Run hooks on application start (#6111)

**What**
- run `onApplicationStart` hook when starting modules
---
 .changeset/neat-seals-help.md             |  5 +++++
 packages/modules-sdk/src/medusa-app.ts    | 18 +++++++++++-------
 packages/modules-sdk/src/medusa-module.ts | 16 ++++++++++++++++
 3 files changed, 32 insertions(+), 7 deletions(-)
 create mode 100644 .changeset/neat-seals-help.md

diff --git a/.changeset/neat-seals-help.md b/.changeset/neat-seals-help.md
new file mode 100644
index 0000000000..f3b0c6d196
--- /dev/null
+++ b/.changeset/neat-seals-help.md
@@ -0,0 +1,5 @@
+---
+"@medusajs/modules-sdk": patch
+---
+
+feat(modules-sdk): run hooks on application start
diff --git a/packages/modules-sdk/src/medusa-app.ts b/packages/modules-sdk/src/medusa-app.ts
index 9ba593ab93..062a38a5ed 100644
--- a/packages/modules-sdk/src/medusa-app.ts
+++ b/packages/modules-sdk/src/medusa-app.ts
@@ -308,12 +308,16 @@ export async function MedusaApp(
       }))
   }
 
-  return {
-    modules: allModules,
-    link: remoteLink,
-    query,
-    entitiesMap: schema.getTypeMap(),
-    notFound,
-    runMigrations,
+  try {
+    return {
+      modules: allModules,
+      link: remoteLink,
+      query,
+      entitiesMap: schema.getTypeMap(),
+      notFound,
+      runMigrations,
+    }
+  } finally {
+    await MedusaModule.onApplicationStart()
   }
 }
diff --git a/packages/modules-sdk/src/medusa-module.ts b/packages/modules-sdk/src/medusa-module.ts
index 19c036071e..6144d93ff8 100644
--- a/packages/modules-sdk/src/medusa-module.ts
+++ b/packages/modules-sdk/src/medusa-module.ts
@@ -1,5 +1,6 @@
 import {
   ExternalModuleDeclaration,
+  IModuleService,
   InternalModuleDeclaration,
   LinkModuleDefinition,
   LoadedModule,
@@ -85,6 +86,21 @@ export class MedusaModule {
       return MedusaModule.getModuleInstance(key)
     })
   }
+  
+  public static onApplicationStart(): 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)()
+            .catch(() => {
+              // The module should handle this and log it
+              return void 0
+            })
+        }
+      }
+    }
+  }
 
   public static clearInstances(): void {
     MedusaModule.instances_.clear()