From bbbdf1a6ecdd6794ca00c7bac8e5600d84ce6892 Mon Sep 17 00:00:00 2001
From: Nikita Tokarchuk <tokarchuk+bitbucket@nevisq.com>
Date: Wed, 26 Dec 2018 23:18:13 +0100
Subject: [PATCH] DeleteOne function

---
 mongox/common/deleteone.go | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 mongox/common/deleteone.go

diff --git a/mongox/common/deleteone.go b/mongox/common/deleteone.go
new file mode 100644
index 0000000..d18cef8
--- /dev/null
+++ b/mongox/common/deleteone.go
@@ -0,0 +1,34 @@
+package common
+
+import (
+	"github.com/mainnika/mongox-go-driver/mongox"
+	"github.com/mainnika/mongox-go-driver/mongox/errors"
+	"github.com/mainnika/mongox-go-driver/mongox/query"
+	"github.com/mongodb/mongo-go-driver/mongo"
+	"github.com/mongodb/mongo-go-driver/mongo/options"
+)
+
+// DeleteOne removes a document from a database and then returns it into target
+func DeleteOne(db *mongox.Database, target interface{}, filters ...interface{}) error {
+
+	collection := db.GetCollectionOf(target)
+	opts := &options.FindOneAndDeleteOptions{}
+	composed := query.Compose(filters...)
+
+	opts.Sort = composed.Sorter()
+
+	result := collection.FindOneAndDelete(db.Context(), composed.M(), opts)
+	if result.Err() != nil {
+		return errors.InternalErrorf("can't create find one and delete result: %s", result.Err())
+	}
+
+	err := result.Decode(target)
+	if err == mongo.ErrNoDocuments {
+		return errors.NotFoundErrorf("%s", err)
+	}
+	if err != nil {
+		return errors.InternalErrorf("can't decode result: %s", err)
+	}
+
+	return nil
+}