Adds a database migration to restore the fileinfos that are deleted (#4815) (#4816)

(cherry picked from commit 257cc5f)

Co-authored-by: Miguel de la Cruz <[email protected]>

Author: mattermost-build

server/services/store/sqlstore/migrations/000040_fix_fileinfo_soft_deletes.down.sql

@@ -0,0 +1 @@
+SELECT 1;

server/services/store/sqlstore/migrations/000040_fix_fileinfo_soft_deletes.up.sql

@@ -0,0 +1,8 @@
+{{if .plugin}}
+  UPDATE FileInfo
+     SET DeleteAt = 0
+   WHERE CreatorId = 'boards'
+     AND DeleteAt != 0;
+{{else}}
+SELECT 1;
+{{end}}

server/services/store/sqlstore/migrationstests/fixtures/test40FixFileinfoSoftDeletes.sql

@@ -0,0 +1,9 @@
+INSERT INTO FileInfo
+(Id, CreatorId, CreateAt, UpdateAt, DeleteAt)
+VALUES
+('fileinfo-1', 'user-id', 1, 1, 1000),
+('fileinfo-2', 'user-id', 1, 1, 1000),
+('fileinfo-3', 'user-id', 1, 1, 0),
+('fileinfo-4', 'boards', 1, 1, 2000),
+('fileinfo-5', 'boards', 1, 1, 2000),
+('fileinfo-6', 'boards', 1, 1, 0);

server/services/store/sqlstore/migrationstests/migration40_test.go

@@ -0,0 +1,48 @@
+package migrationstests
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func Test40FixFileinfoSoftDeletes(t *testing.T) {
+	th, tearDown := SetupPluginTestHelper(t)
+	defer tearDown()
+
+	th.f.MigrateToStep(39).
+		ExecFile("./fixtures/test40FixFileinfoSoftDeletes.sql").
+		MigrateToStep(40)
+
+	type FileInfo struct {
+		Id       string
+		DeleteAt int
+	}
+
+	getFileInfo := func(t *testing.T, id string) FileInfo {
+		t.Helper()
+		fileInfo := FileInfo{}
+
+		query := "SELECT id, deleteat FROM FileInfo WHERE id = $1"
+		if th.IsMySQL() {
+			query = "SELECT Id as id, DeleteAt as deleteat FROM FileInfo WHERE Id = ?"
+		}
+
+		err := th.f.DB().Get(&fileInfo, query, id)
+		require.NoError(t, err)
+
+		return fileInfo
+	}
+
+	t.Run("the file infos that don't belong to boards will not be restored", func(t *testing.T) {
+		require.Equal(t, 1000, getFileInfo(t, "fileinfo-1").DeleteAt)
+		require.Equal(t, 1000, getFileInfo(t, "fileinfo-2").DeleteAt)
+		require.Empty(t, getFileInfo(t, "fileinfo-3").DeleteAt)
+	})
+
+	t.Run("the file infos that belong to boards should correctly be restored", func(t *testing.T) {
+		require.Empty(t, getFileInfo(t, "fileinfo-3").DeleteAt)
+		require.Empty(t, getFileInfo(t, "fileinfo-4").DeleteAt)
+		require.Empty(t, getFileInfo(t, "fileinfo-5").DeleteAt)
+	})
+}