feat: add memory

memory.go

@@ -0,0 +1,44 @@
+package goba
+
+import (
+	"errors"
+	"strings"
+
+	zero "github.com/wdvxdr1123/ZeroBot"
+)
+
+var (
+	errEmptyMempry     = errors.New("empty memory")
+	errMemoryHasReturn = errors.New("memory has \\r|\\n")
+)
+
+type MemoryStorage interface {
+	Save(grp int64, text string) error
+	Load(grp int64) []string
+}
+
+func extractMemory(r *zero.APIRequest) (string, error) {
+	txt, ok := r.Params["text"].(string)
+	if !ok || txt == "" {
+		return "", errEmptyMempry
+	}
+	for _, c := range txt {
+		if c == '\r' || c == '\n' {
+			return "", errMemoryHasReturn
+		}
+	}
+	return txt, nil
+}
+
+func (ag *Agent) memoryof(grp int64) string {
+	mems := ag.mem.Load(grp)
+	if len(mems) == 0 {
+		return ""
+	}
+	sb := strings.Builder{}
+	for _, m := range mems {
+		sb.WriteByte('\n')
+		sb.WriteString(m)
+	}
+	return sb.String()
+}