From 555096102a502f5c3be0c4d3ce10706f810c2f61 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mike=20Schw=C3=B6rer?= <pubgit@mikescher.com>
Date: Tue, 6 Jun 2023 21:30:22 +0200
Subject: [PATCH] v0.0.137

---
 wmo/collection.go | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/wmo/collection.go b/wmo/collection.go
index 5f44943..6167edd 100644
--- a/wmo/collection.go
+++ b/wmo/collection.go
@@ -220,6 +220,32 @@ func (c *Coll[TData]) List(ctx context.Context, filter ct.Filter, pageSize *int,
 	return entities, nextToken, nil
 }
 
+func (c *Coll[TData]) Count(ctx context.Context, filter ct.Filter) (int64, error) {
+	pipeline := filter.FilterQuery()
+
+	pipeline = append(pipeline, bson.D{{Key: "$count", Value: "c"}})
+
+	cursor, err := c.coll.Aggregate(ctx, pipeline)
+	if err != nil {
+		return 0, err
+	}
+
+	type res struct {
+		Count int64 `bson:"c"`
+	}
+
+	if cursor.Next(ctx) {
+		v := res{}
+		err = cursor.Decode(&v)
+		if err != nil {
+			return 0, err
+		}
+		return v.Count, nil
+	}
+
+	return 0, nil
+}
+
 func (c *Coll[TData]) createToken(fieldPrimary string, dirPrimary ct.SortDirection, fieldSecondary *string, dirSecondary *ct.SortDirection, lastEntity TData, pageSize *int) (ct.CursorToken, error) {
 
 	valuePrimary, err := c.getFieldValueAsTokenString(lastEntity, fieldPrimary)