UBER-174: Introduce createOn every there (#3222)

Signed-off-by: Andrey Sobolev <haiodo@gmail.com>

server/middleware/src/modified.ts

@@ -13,16 +13,7 @@
 // limitations under the License.
 //
 
-import core, {
-  AttachedDoc,
-  Doc,
-  MeasureContext,
-  ServerStorage,
-  Timestamp,
-  Tx,
-  TxCollectionCUD,
-  TxCreateDoc
-} from '@hcengineering/core'
+import core, { MeasureContext, ServerStorage, Tx } from '@hcengineering/core'
 import { BroadcastFunc, Middleware, SessionContext, TxMiddlewareResult } from '@hcengineering/server-core'
 import { BaseMiddleware } from './base'
 
@@ -46,24 +37,7 @@ export class ModifiedMiddleware extends BaseMiddleware implements Middleware {
   async tx (ctx: SessionContext, tx: Tx): Promise<TxMiddlewareResult> {
     if (tx.modifiedBy !== core.account.System) {
       tx.modifiedOn = Date.now()
-      if (this.storage.hierarchy.isDerived(tx._class, core.class.TxCreateDoc)) {
-        const createTx = tx as TxCreateDoc<Doc & { createOn: Timestamp }>
-        const hasCreateOn = this.storage.hierarchy.findAttribute(createTx.objectClass, 'createOn')
-        if (hasCreateOn !== undefined) {
-          createTx.attributes.createOn = tx.modifiedOn
-        }
-      }
-      if (this.storage.hierarchy.isDerived(tx._class, core.class.TxCollectionCUD)) {
-        const coltx = tx as TxCollectionCUD<Doc, AttachedDoc>
-        coltx.tx.modifiedOn = tx.modifiedOn
-        if (this.storage.hierarchy.isDerived(coltx.tx._class, core.class.TxCreateDoc)) {
-          const createTx = coltx.tx as TxCreateDoc<AttachedDoc & { createOn: Timestamp }>
-          const hasCreateOn = this.storage.hierarchy.findAttribute(createTx.objectClass, 'createOn')
-          if (hasCreateOn !== undefined) {
-            createTx.attributes.createOn = tx.modifiedOn
-          }
-        }
-      }
+      tx.createOn = tx.createOn ?? tx.modifiedOn
     }
     return await this.provideTx(ctx, tx)
   }