refactored more commands to work with command registry

1 files changed, 30 insertions, 0 deletions

diff --git a/pkg/commands/lpop.go b/pkg/commands/lpop.go
new file mode 100644
index 0000000..d1e1ccb
--- /dev/null
+++ b/pkg/commands/lpop.go
@@ -0,0 +1,30 @@
+package commands
+
+import (
+	"errors"
+	"redisClone/pkg/core"
+)
+
+func Lpop(args []string, getShard func(k string) *core.Shard) interface{}{
+		key := args[1]
+		s := getShard(key)
+		item, exists := s.Data[key]
+		if !exists {
+			return nil
+		}
+		typedList, ok := item.Value.([]string)
+		if !ok {
+			return errors.New("WRONGTYPE Operation against a key holding the wrong kind of value")
+		}
+		if len(typedList) == 0 {
+			return nil
+		}
+		newItem := typedList[0]
+		newList := typedList[1:]
+		if len(newList) <= 0 {
+			delete(s.Data, key)
+		} else {
+			s.Data[key] = core.Item{Value: newList}
+		}
+		return newItem
+}
\ No newline at end of file