From 9c889c7cffc132beef4d3a036d2e0769ed911e05 Mon Sep 17 00:00:00 2001
From: Juan Tejada <juans.tejada@gmail.com>
Date: Wed, 12 Apr 2017 20:38:50 -0700
Subject: [PATCH] [client-app] Prevent old N1 config from getting wiped when
 installing Nylas Mail

Summary:
Due to a legacy migration system, users that had previously installed
old N1 (1.5.0) would get their N1 config wiped after installing Nylas
Mail (2.0) in most cases.

See https://github.com/nylas/nylas-mail/blob/n1-pro/src/browser/nylas-pro-migrator.es6 for details

Fixes T8096

Test Plan: manual

Reviewers: halla, spang, mark

Reviewed By: mark

Maniphest Tasks: T8096

Differential Revision: https://phab.nylas.com/D4417
---
 .../client-app/src/browser/application.es6    |  3 +++
 .../browser/prevent-legacy-n1-migration.es6   | 22 +++++++++++++++++++
 2 files changed, 25 insertions(+)
 create mode 100644 packages/client-app/src/browser/prevent-legacy-n1-migration.es6

diff --git a/packages/client-app/src/browser/application.es6 b/packages/client-app/src/browser/application.es6
index b51966031..ed20ae956 100644
--- a/packages/client-app/src/browser/application.es6
+++ b/packages/client-app/src/browser/application.es6
@@ -21,6 +21,7 @@ import DefaultClientHelper from '../default-client-helper';
 import NylasProtocolHandler from './nylas-protocol-handler';
 import PackageMigrationManager from './package-migration-manager';
 import ConfigPersistenceManager from './config-persistence-manager';
+import preventLegacyN1Migration from './prevent-legacy-n1-migration';
 
 let clipboard = null;
 
@@ -55,6 +56,8 @@ export default class Application extends EventEmitter {
     this.configPersistenceManager = new ConfigPersistenceManager({configDirPath, resourcePath});
     config.load();
 
+    preventLegacyN1Migration(configDirPath)
+
     this.configMigrator = new ConfigMigrator(this.config, this.databaseReader);
     this.configMigrator.migrate()
 
diff --git a/packages/client-app/src/browser/prevent-legacy-n1-migration.es6 b/packages/client-app/src/browser/prevent-legacy-n1-migration.es6
new file mode 100644
index 000000000..ca4a0060f
--- /dev/null
+++ b/packages/client-app/src/browser/prevent-legacy-n1-migration.es6
@@ -0,0 +1,22 @@
+import fs from 'fs'
+import path from 'path'
+
+// This function prevents old N1 from destroying its own config and copying the
+// one from Nylas Mail 2.0. The expected workflow now is to migrate from old
+// N1 (1.5.0) to Nylas Mail (2.0) instead of the other way around
+// See https://github.com/nylas/nylas-mail/blob/n1-pro/src/browser/nylas-pro-migrator.es6 for details
+export default function preventLegacyN1Migration(configDirPath) {
+  try {
+    const legacyConfigPath = path.join(configDirPath, '..', '.nylas', 'config.json')
+    if (!fs.existsSync(legacyConfigPath)) { return }
+    const legacyConfig = require(legacyConfigPath) || {}  // eslint-disable-line
+    if (!legacyConfig['*']) {
+      legacyConfig['*'] = {}
+    }
+    legacyConfig['*'].nylasMailBasicMigrationTime = Date.now()
+    fs.writeFileSync(legacyConfigPath, JSON.stringify(legacyConfig))
+  } catch (err) {
+    console.error('Error preventing legacy N1 migration')
+    console.error(err)
+  }
+}