[MM-46644] Auto respond message (#20900)

Automatic Merge

model/utils.go

@@ -34,8 +34,11 @@ const (
 	SYMBOLS          = " !\"\\#$%&'()*+,-./:;<=>?@[]^_`|~"
 	BinaryParamKey   = "MM_BINARY_PARAMETERS"
 	NoTranslation    = "<untranslated>"
+	maxPropSizeBytes = 1024 * 1024
 )
 
+var ErrMaxPropSizeExceeded = fmt.Errorf("max prop size of %d exceeded", maxPropSizeBytes)
+
 type StringInterface map[string]any
 type StringArray []string
 
@@ -77,6 +80,14 @@ func (sa StringArray) Equals(input StringArray) bool {
 
 // Value converts StringArray to database value
 func (sa StringArray) Value() (driver.Value, error) {
+	sz := 0
+	for i := range sa {
+		sz += len(sa[i])
+		if sz > maxPropSizeBytes {
+			return nil, ErrMaxPropSizeExceeded
+		}
+	}
+
 	j, err := json.Marshal(sa)
 	if err != nil {
 		return nil, err
@@ -127,6 +138,15 @@ func (m *StringMap) Scan(value any) error {
 func (m StringMap) Value() (driver.Value, error) {
 	ok := m[BinaryParamKey]
 	delete(m, BinaryParamKey)
+
+	sz := 0
+	for k := range m {
+		sz += len(k) + len(m[k])
+		if sz > maxPropSizeBytes {
+			return nil, ErrMaxPropSizeExceeded
+		}
+	}
+
 	buf, err := json.Marshal(m)
 	if err != nil {
 		return nil, err
@@ -182,6 +202,11 @@ func (si StringInterface) Value() (driver.Value, error) {
 	if err != nil {
 		return nil, err
 	}
+
+	if len(j) > maxPropSizeBytes {
+		return nil, ErrMaxPropSizeExceeded
+	}
+
 	// non utf8 characters are not supported https://mattermost.atlassian.net/browse/MM-41066
 	return string(j), err
 }