Add Find with offset

find.go

@@ -104,6 +104,65 @@ func (c *MongoClient) Find(ctx context.Context, database, name string, filter bs
 	return out, nil
 }
 
+func (c *MongoClient) FindOffset(ctx context.Context, database, name string, filter bson.M, offset, limit int64) (bson.M, error) {
+	// 1. Prepare to query.
+	collection := c.GetCollection(database, name)
+
+	finalLimit := max(limit, c.Limit)
+  						
+	pipeline := BuildPaginationPipeline(offset, finalLimit, filter, nil)
+
+	// 2. Query
+	cursor, err := collection.Aggregate(ctx, pipeline)
+	if err != nil {
+		return nil, err
+	}
+	defer cursor.Close(ctx)
+
+	// 3. Build results
+	var facetResults []bson.M
+	if err = cursor.All(ctx, &facetResults); err != nil {
+		return nil, err
+	}
+
+	root := facetResults[0]
+
+	data := root["data"].(bson.A)
+
+	metadata := root["metadata"].(bson.A)
+
+	var totalValue any
+	if len(metadata) != 0 {
+		metadataRoot := metadata[0].(bson.M)
+		totalValue = metadataRoot["total"]
+	}
+
+	var total int64
+	switch v := totalValue.(type) {
+	case int32:
+	  total = int64(v)
+	case int64:
+	  total = v
+	default:
+		total = 0
+	}
+
+	hasMore := false
+	if int64(len(data)) > finalLimit {
+		hasMore = true
+		data = data[:finalLimit]
+	}
+
+	out := bson.M{
+		"data": data,
+		"offset": offset,
+		"limit": finalLimit,
+		"has_more": hasMore,
+		"total": total,
+	}
+
+	return out, nil
+}
 // func (c *MongoClient) FindNext(ctx context.Context, database, name string, filter bson.M, nextCursor string, limit int64) ([]bson.M, error) {
 // 	collection := c.GetCollection(database, name)
 

pipeline.go

@@ -6,13 +6,10 @@ import (
 )
 
 func BuildPaginationPipeline(skip, limit int64, filter bson.M, sort bson.M) mongo.Pipeline {
-  return mongo.Pipeline{
+  pipe := mongo.Pipeline{
     // 1. GLOBAL FILTER: Always filter first to use indexes
     {{Key: "$match", Value: filter}},
     
-    // 2. GLOBAL SORT: Sort here so both 'total' and 'data' facets use the same order
-    {{Key: "$sort", Value: sort}},
-
     // 3. FACET: Split the pipeline into two parallel paths
     {{Key: "$facet", Value: bson.D{
       // Path A: Get the total count of documents matching the filter
@@ -26,6 +23,13 @@ func BuildPaginationPipeline(skip, limit int64, filter bson.M, sort bson.M) mong
       }},
     }}},
   }
+
+  // 2. GLOBAL SORT: Sort here so both 'total' and 'data' facets use the same order
+  if sort != nil {
+    pipe = append(pipe, bson.D{{Key: "$sort", Value: sort}})
+  }
+
+  return pipe
 }
 
 func BuildPaginationPipelineNext(limit int64, filter bson.M, sort bson.M) mongo.Pipeline {