Remove NotificationSettings table (#5036

* helper

* Add script to move notification settings

* wip, removal of NotificationSettings

* event name

* iteration

* test

* test

* Remove last of NotificationSettings model

* refactor

* More fixes

* snapshots

* Change emails to class instances for type safety

* test

* docs

* Update migration for self-hosted

* tsc

server/migrations/20230314013103-move-notification-settings.js

@@ -0,0 +1,66 @@
+"use strict";
+
+module.exports = {
+  async up(queryInterface, Sequelize) {
+    await queryInterface.sequelize.transaction(async (transaction) => {
+      await queryInterface.addColumn("users", "notificationSettings", {
+        type: Sequelize.JSONB,
+        allowNull: false,
+        defaultValue: {},
+        transaction,
+      });
+
+      if (process.env.DEPLOYMENT === "hosted") {
+        return;
+      }
+
+      // In cloud hosted Outline this migration is done in a script instead due
+      // to scale considerations.
+      const users = await queryInterface.sequelize.query(
+        "SELECT id FROM users",
+        {
+          type: queryInterface.sequelize.QueryTypes.SELECT,
+          transaction
+        }
+      );
+
+      for (const user of users) {
+        const settings = await queryInterface.sequelize.query(
+          `SELECT * FROM notification_settings WHERE "userId" = :userId`,
+          {
+            type: queryInterface.sequelize.QueryTypes.SELECT,
+            replacements: { userId: user.id },
+            transaction
+          }
+        );
+
+        const eventTypes = settings.map((setting) => setting.event);
+      
+
+        if (eventTypes.length > 0) {
+          const notificationSettings = {};
+
+          for (const eventType of eventTypes) {
+            notificationSettings[eventType] = true;
+          }
+
+          await queryInterface.sequelize.query(
+            `UPDATE users SET "notificationSettings" = :notificationSettings WHERE id = :userId`,
+            {
+              type: queryInterface.sequelize.QueryTypes.UPDATE,
+              replacements: {
+                userId: user.id,
+                notificationSettings: JSON.stringify(notificationSettings),
+              },
+              transaction
+            }
+          );
+        }
+      }
+    });
+  },
+
+  async down (queryInterface) {
+    return queryInterface.removeColumn("users", "notificationSettings");
+  }
+};