基本功能差不多完成

discard_store.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+)
+
+func (s *store) InsertDiscardDetails(record map[string]any, raw []byte, clientInfo mqttClientInfo) error {
+	details, err := discardDetailsFromRecord(record, raw, clientInfo)
+	if err != nil {
+		return err
+	}
+	if err := s.db.Create(details).Error; err != nil {
+		return fmt.Errorf("insert discard_details: %w", err)
+	}
+	return nil
+}
+
+func discardDetailsFromRecord(record map[string]any, raw []byte, clientInfo mqttClientInfo) (*discardDetailsRecord, error) {
+	contentJSON, err := json.Marshal(record)
+	if err != nil {
+		return nil, fmt.Errorf("encode discard_details content_json: %w", err)
+	}
+	return &discardDetailsRecord{
+		Topic:          stringValue(record["topic"]),
+		Error:          stringValue(record["error"]),
+		PayloadLen:     int64(len(raw)),
+		RawBase64:      base64.StdEncoding.EncodeToString(raw),
+		ContentJSON:    string(contentJSON),
+		MQTTClientID:   nullableStringValue(clientInfo.ClientID),
+		MQTTUsername:   nullableStringValue(clientInfo.Username),
+		MQTTListener:   nullableStringValue(clientInfo.Listener),
+		MQTTRemoteAddr: nullableStringValue(clientInfo.RemoteAddr),
+		MQTTRemoteHost: nullableStringValue(clientInfo.RemoteHost),
+		MQTTRemotePort: nullableStringValue(clientInfo.RemotePort),
+	}, nil
+}
+
+func stringValue(value any) string {
+	if s := nullableStringValue(value); s != nil {
+		return *s
+	}
+	return ""
+}