feat(SmartDataDbDoc): add static .getCount({}) method

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartdata',
-  version: '5.1.2',
+  version: '5.2.0',
   description: 'An advanced library for NoSQL data organization and manipulation using TypeScript with support for MongoDB, data validation, collections, and custom data types.'
 }

ts/smartdata.classes.collection.ts

@@ -273,6 +273,11 @@ export class SmartdataCollection<T> {
     await this.mongoDbCollection.deleteOne(identifiableObject);
   }
 
+  public async getCount(filterObject: any) {
+    await this.init();
+    return this.mongoDbCollection.countDocuments(filterObject);
+  }
+
   /**
    * checks a Doc for constraints
    * if this.objectValidation is not set it passes.

ts/smartdata.classes.doc.ts

@@ -181,6 +181,17 @@ export class SmartDataDbDoc<T extends TImplements, TImplements, TManager extends
     await cursor.forEach(forEachFunction);
   }
 
+  /**
+   * returns a count of the documents in the collection
+   */
+  public static async getCount<T>(
+    this: plugins.tsclass.typeFest.Class<T>,
+    filterArg: plugins.tsclass.typeFest.PartialDeep<T> = ({} as any)
+  ) {
+    const collection: SmartdataCollection<T> = (this as any).collection;
+    return await collection.getCount(filterArg);
+  }
+
   // INSTANCE
 
   /**