fix: import resource imporements

packages/server/src/services/Import/Importable.ts

@@ -1,4 +1,6 @@
 import { Knex } from 'knex';
+import * as Yup from 'yup';
+import { ImportableContext } from './interfaces';
 
 export abstract class Importable {
   /**
@@ -13,6 +15,16 @@ export abstract class Importable {
     );
   }
 
+  /**
+   * Transformes the DTO before passing it to importable and validation.
+   * @param {Record<string, any>} createDTO
+   * @param {ImportableContext} context
+   * @returns {Record<string, any>}
+   */
+  public transform(createDTO: Record<string, any>, context: ImportableContext) {
+    return createDTO;
+  }
+
   /**
    * Concurrency controlling of the importing process.
    * @returns {number}
@@ -20,4 +32,41 @@ export abstract class Importable {
   public get concurrency() {
     return 10;
   }
+
+  /**
+   * Retrieves the sample data of importable.
+   * @returns {Array<any>}
+   */
+  public sampleData(): Array<any> {
+    return [];
+  }
+
+  // ------------------
+  // # Params
+  // ------------------
+  /**
+   * Params Yup validation schema.
+   * @returns {Yup.ObjectSchema<object, object>}
+   */
+  public paramsValidationSchema(): Yup.ObjectSchema<object, object> {
+    return Yup.object().nullable();
+  }
+
+  /**
+   * Validates the params of the importable service.
+   * @param {Record<string, any>}
+   * @returns {Promise<boolean>} - True means passed and false failed.
+   */
+  public async validateParams(
+    tenantId: number,
+    params: Record<string, any>
+  ): Promise<void> {}
+
+  /**
+   * Transformes the import params before storing them.
+   * @param {Record<string, any>} parmas
+   */
+  public transformParams(parmas: Record<string, any>) {
+    return parmas;
+  }
 }