Store user IP in database

Fix migration mechanism.

Author: cirosantilli

README.adoc

@@ -536,3 +536,9 @@ Some things we could do include:
 Some spam events:
 
 * 2021-12-22 https://archive.ph/EVcUw spammed a bunch of pro Chinese government messages, see also: https://github.com/cirosantilli/china-dictatorship and https://cirosantilli.com/china-dictatorship/backlinks
++
+Did a bit of updating with `./heroku.sh psql`:
++
+....
+UPDATE "Tag" SET name = REPLACE(name, '', '六四事件法轮功新疆再教育營')
+....

api/users.js

@@ -78,6 +78,7 @@ router.post('/users', async function(req, res, next) {
     }
     user.username = req.body.user.username
     user.email = req.body.user.email
+    user.ip = req.headers['x-forwarded-for']
     req.app.get('sequelize').models.User.setPassword(user, req.body.user.password)
     await user.save()
     await lib.deleteOldestForDemo(req.app.get('sequelize').models.User)

bin/sync-db.js

@@ -9,11 +9,20 @@
 (async () => {
 const path = require('path')
 const child_process = require('child_process');
+const { DatabaseError } = require('sequelize')
 const models = require('../models')
 
 const sequelize = models.getSequelize(path.dirname(__dirname));
-let dbExists = await models.sync(sequelize)
-if (!dbExists) {
+let dbEmpty = true;
+try {
+  await sequelize.models.SequelizeMeta.findOne()
+  dbEmpty = false
+} catch(e) {
+  if (e instanceof DatabaseError) {
+    await models.sync(sequelize)
+  }
+}
+if (!dbEmpty) {
   out = child_process.spawnSync('npx', ['sequelize-cli', 'db:migrate'])
   console.error(out.stdout.toString());
   console.error(out.stderr.toString());

migrations/20211225000000-user-add-ip-column.js

@@ -0,0 +1,14 @@
+module.exports = {
+  up: async (queryInterface, Sequelize) => queryInterface.sequelize.transaction(async transaction => {
+    await queryInterface.addColumn('User', 'ip',
+      {
+        type: Sequelize.STRING,
+        defaultValue: '',
+      },
+      {transaction},
+    )
+  }),
+  down: async (queryInterface, Sequelize) => {
+    await queryInterface.removeColumn('User', 'displayName')
+  }
+};

models/user.js

@@ -54,7 +54,11 @@ module.exports = (sequelize) => {
       bio: DataTypes.STRING,
       image: DataTypes.STRING,
       hash: DataTypes.STRING(1024),
-      salt: DataTypes.STRING
+      salt: DataTypes.STRING,
+      ip: {
+        type: DataTypes.STRING,
+        default: '',
+      }
     },
     {
       indexes: [{ fields: ['username'] }, { fields: ['email'] }]