refactroed LPUSH and RPUSH for command registry

1 files changed, 26 insertions, 0 deletions

diff --git a/pkg/commands/lpush.go b/pkg/commands/lpush.go
new file mode 100644
index 0000000..dcd67ee
--- /dev/null
+++ b/pkg/commands/lpush.go
@@ -0,0 +1,26 @@
+package commands
+
+import (
+	"errors"
+	"redisClone/pkg/core"
+)
+
+func Lpush(args []string, getShard func(k string) *core.Shard) interface{}{
+	key := args[1]
+	newItems := args[2:]
+	s := getShard(key)
+	var list []string
+	existingItem, exists := s.Data[key]
+	if exists {
+		var ok bool
+		list, ok = existingItem.Value.([]string)
+		if !ok {
+			return errors.New("WRONGTYPE Operation against a key holding the wrong kind of value")
+		}
+	} else {
+		list = []string{}
+	}
+	list = append(newItems, list...)
+	s.Data[key] = core.Item{Value: list}
+	return len(list)
+}
\ No newline at end of file