MM-56083 Add PatchMultipleMembersNotifyProps plugin API (#25690)

* Add ChannelStore.UpdateMultipleMembersNotifyProps

* Make UpdateMultipleMembersNotifyProps return updated values from the DB

* Add UpdateChannelMembersNotifications plugin API

* Extract i18n

* Fix style

* Make layers

* Change to PatchMultipleMembersNotifyProps

* Add limit to PatchChannelMembersNotifyProps

* Add additional unit tests

* Address feedback

* Lowercase decodeJSON

* Have PatchMultipleMembersNotifyProps update LastUpdateAt

* Fix tests that relied on unreliable return order

* Fix i18n

server/public/model/channel_member_test.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 	"testing"
 
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
 
@@ -18,8 +19,11 @@ func TestChannelMemberIsValid(t *testing.T) {
 	o.ChannelId = NewId()
 	require.NotNil(t, o.IsValid(), "should be invalid")
 
-	o.NotifyProps = GetDefaultChannelNotifyProps()
 	o.UserId = NewId()
+	require.NotNil(t, o.IsValid(), "should be invalid because of missing notify props")
+
+	o.NotifyProps = GetDefaultChannelNotifyProps()
+	require.Nil(t, o.IsValid(), "should be valid")
 
 	o.NotifyProps["desktop"] = "junk"
 	require.NotNil(t, o.IsValid(), "should be invalid")
@@ -42,3 +46,15 @@ func TestChannelMemberIsValid(t *testing.T) {
 	o.NotifyProps["property"] = strings.Repeat("Z", ChannelMemberNotifyPropsMaxRunes)
 	require.NotNil(t, o.IsValid(), "should be invalid")
 }
+
+func TestIsChannelMemberNotifyPropsValid(t *testing.T) {
+	t.Run("should require certain fields unless allowMissingFields is true", func(t *testing.T) {
+		notifyProps := map[string]string{}
+
+		err := IsChannelMemberNotifyPropsValid(notifyProps, false)
+		assert.NotNil(t, err)
+
+		err = IsChannelMemberNotifyPropsValid(notifyProps, true)
+		assert.Nil(t, err)
+	})
+}