feat: convert Super notes to Markdown behind the scenes while publishing to Listed (#2064)

packages/snjs/lib/Application/Application.ts

@@ -295,6 +295,10 @@ export class SNApplication implements ApplicationInterface, AppGroupManagedAppli
     return this.diskStorageService
   }
 
+  public get actions(): InternalServices.SNActionsService {
+    return this.actionsManager
+  }
+
   public computePrivateUsername(username: string): Promise<string | undefined> {
     return ComputePrivateUsername(this.options.crypto, username)
   }

packages/snjs/lib/Services/Actions/ActionsService.ts

@@ -1,3 +1,4 @@
+import { removeFromArray } from '@standardnotes/utils'
 import { SNRootKey } from '@standardnotes/encryption'
 import { ChallengeService } from '../Challenge'
 import { ListedService } from '../Listed/ListedService'
@@ -18,6 +19,8 @@ import {
   isErrorDecryptingPayload,
   CreateEncryptedBackupFileContextPayload,
   EncryptedTransferPayload,
+  TransferPayload,
+  ItemContent,
 } from '@standardnotes/models'
 import { SNSyncService } from '../Sync/SyncService'
 import { PayloadManager } from '../Payloads/PayloadManager'
@@ -34,6 +37,8 @@ import {
   Challenge,
 } from '@standardnotes/services'
 
+type PayloadRequestHandler = (uuid: string) => TransferPayload | undefined
+
 /**
  * The Actions Service allows clients to interact with action-based extensions.
  * Action-based extensions are mostly RESTful actions that can push a local value or
@@ -50,6 +55,7 @@ import {
  */
 export class SNActionsService extends AbstractService {
   private previousPasswords: string[] = []
+  private payloadRequestHandlers: PayloadRequestHandler[] = []
 
   constructor(
     private itemManager: ItemManager,
@@ -81,6 +87,14 @@ export class SNActionsService extends AbstractService {
     super.deinit()
   }
 
+  public addPayloadRequestHandler(handler: PayloadRequestHandler) {
+    this.payloadRequestHandlers.push(handler)
+
+    return () => {
+      removeFromArray(this.payloadRequestHandlers, handler)
+    }
+  }
+
   public getExtensions(): SNActionsExtension[] {
     const extensionItems = this.itemManager.getItems<SNActionsExtension>(ContentType.ActionsExtension)
     const excludingListed = extensionItems.filter((extension) => !extension.isListedExtension)
@@ -312,7 +326,16 @@ export class SNActionsService extends AbstractService {
     return {} as ActionResponse
   }
 
-  private async outgoingPayloadForItem(item: DecryptedItemInterface, decrypted = false) {
+  private async outgoingPayloadForItem(
+    item: DecryptedItemInterface,
+    decrypted = false,
+  ): Promise<TransferPayload<ItemContent>> {
+    const payloadFromHandler = this.getPayloadFromRequestHandlers(item.uuid)
+
+    if (payloadFromHandler) {
+      return payloadFromHandler
+    }
+
     if (decrypted) {
       return item.payload.ejected()
     }
@@ -323,4 +346,15 @@ export class SNActionsService extends AbstractService {
 
     return CreateEncryptedBackupFileContextPayload(encrypted)
   }
+
+  private getPayloadFromRequestHandlers(uuid: string): TransferPayload | undefined {
+    for (const handler of this.payloadRequestHandlers) {
+      const payload = handler(uuid)
+      if (payload) {
+        return payload
+      }
+    }
+
+    return undefined
+  }
 }