backuptarget: pseudo target for import and restore

src/backuptargets.js

@@ -22,8 +22,6 @@ exports = module.exports = {
     getSnapshotInfo,
     setSnapshotInfo,
 
-    validateFormat,
-
     getRootPath,
 
     remount,
@@ -33,9 +31,12 @@ exports = module.exports = {
     storageApi,
 
     getBackupFilePath,
+
+    createPseudo,
 };
 
 const assert = require('assert'),
+    backupFormat = require('./backupformat.js'),
     backups = require('./backups.js'),
     BoxError = require('./boxerror.js'),
     constants = require('./constants.js'),
@@ -160,14 +161,6 @@ function removePrivateFields(target) {
     return target;
 }
 
-function validateFormat(format) {
-    assert.strictEqual(typeof format, 'string');
-
-    if (format === 'tgz' || format == 'rsync') return null;
-
-    return new BoxError(BoxError.BAD_FIELD, 'Invalid backup format');
-}
-
 function validateLabel(label) {
     assert.strictEqual(typeof label, 'string');
 
@@ -492,7 +485,7 @@ async function add(data, auditSource) {
         encryptionPassword = data.encryptionPassword || null,
         encryptedFilenames = data.encryptedFilenames || false;
 
-    const formatError = validateFormat(format);
+    const formatError = backupFormat.validateFormat(format);
     if (formatError) throw formatError;
 
     const labelError = validateLabel(label);
@@ -522,3 +515,27 @@ async function add(data, auditSource) {
 
     return id;
 }
+
+// creates a backup target object that is not in the database
+async function createPseudo(data) {
+    assert.strictEqual(typeof data, 'object');
+
+    const { id, provider, config, format } = data; // required
+    const encryptionPassword = data.encryptionPassword || null,
+        encryptedFilenames = data.encryptedFilenames || false;
+
+    const formatError = backupFormat.validateFormat(format);
+    if (formatError) throw formatError;
+
+    let encryption = null;
+    if (encryptionPassword) {
+        const encryptionPasswordError = validateEncryptionPassword(encryptionPassword);
+        if (encryptionPasswordError) throw encryptionPasswordError;
+        encryption = hush.generateEncryptionKeysSync(encryptionPassword);
+        encryption.encryptedFilenames = !!encryptedFilenames;
+    }
+
+    debug('add: validating new storage configuration');
+    const sanitizedConfig = await storageApi({ provider }).verifyConfig({id, provider, config });
+    return { id, format, provider, config: sanitizedConfig, encryption };
+}