1 files changed, 41 insertions, 0 deletions
diff --git a/pkg/commands/keys.go b/pkg/commands/keys.go
new file mode 100644
index 0000000..b233964
--- /dev/null
+++ b/pkg/commands/keys.go
@@ -0,0 +1,41 @@
+package commands
+
+import (
+	"errors"
+	"path/filepath"
+	"redisClone/pkg/core"
+	"sort"
+	"strconv"
+)
+
+func Keys(args []string, getShard func(k string) *core.Shard) interface{} {
+	pattern := args[1]
+	limit := -1
+	if len(args) == 3 {
+		val, err := strconv.Atoi(args[2])
+		if err != nil {
+			return errors.New("value is not an integer")
+		}
+		limit = val
+	}
+
+	return dbInstance.ExecuteReadAll(func(shards []*core.Shard) interface{} {
+		var matches []string
+		for _, shard := range shards {
+			for key := range shard.Data {
+				matched, err := filepath.Match(pattern, key)
+				if err != nil {
+					return errors.New("illegal glob pattern")
+				}
+				if matched {
+					matches = append(matches, key)
+				}
+			}
+		}
+		sort.Strings(matches)
+		if limit != -1 && len(matches) > limit {
+			matches = matches[:limit]
+		}
+		return matches
+	})
+}