Removed etc and get modules and replaced them with generic module. Implemented functions to set and remove the expiry of a key. Implemented LRU and LFU caches using heap.

src/modules/generic/key_funcs.go

@@ -0,0 +1,40 @@
+package generic
+
+import (
+	"errors"
+	"github.com/echovault/echovault/src/utils"
+)
+
+func setKeyFunc(cmd []string) ([]string, error) {
+	if len(cmd) < 3 || len(cmd) > 7 {
+		return nil, errors.New(utils.WrongArgsResponse)
+	}
+	return []string{cmd[1]}, nil
+}
+
+func msetKeyFunc(cmd []string) ([]string, error) {
+	if len(cmd[1:])%2 != 0 {
+		return nil, errors.New("each key must be paired with a value")
+	}
+	var keys []string
+	for i, key := range cmd[1:] {
+		if i%2 == 0 {
+			keys = append(keys, key)
+		}
+	}
+	return keys, nil
+}
+
+func getKeyFunc(cmd []string) ([]string, error) {
+	if len(cmd) != 2 {
+		return nil, errors.New(utils.WrongArgsResponse)
+	}
+	return []string{cmd[1]}, nil
+}
+
+func mgetKeyFunc(cmd []string) ([]string, error) {
+	if len(cmd) < 2 {
+		return nil, errors.New(utils.WrongArgsResponse)
+	}
+	return cmd[1:], nil
+}