feat(chat-service): add mysql db migrations (#1867)

MIGRATION CHANGE:
migration-20231221002804- seperate migrations for mysql db
migration-20201103141746-  seperate migrations for mysql db

add support for mysql db by creating seperate directories for mysql and pg migrations

gh-1836

Co-authored-by: yeshamavani <83634146+yeshamavani@users.noreply.github.com>

services/chat-service/migrations/mysql/database.json

@@ -0,0 +1,24 @@
+{
+  "defaultEnv": "master",
+  "master": {
+    "driver": "mysql",
+    "multipleStatements": true,
+    "host": {
+      "ENV": "DB_HOST"
+    },
+    "port": {
+      "ENV": "DB_PORT"
+    },
+    "user": {
+      "ENV": "DB_USER"
+    },
+    "password": {
+      "ENV": "DB_PASSWORD"
+    },
+    "database": {
+      "ENV": "DB_DATABASE"
+    }
+  },
+  "sql-file": true
+}
+

services/chat-service/migrations/mysql/migrations/20231221002804-init.js

@@ -0,0 +1,51 @@
+'use strict';
+
+var dbm;
+var type;
+var seed;
+var fs = require('fs');
+var path = require('path');
+var Promise;
+
+/**
+ * We receive the dbmigrate dependency from dbmigrate initially.
+ * This enables us to not have to rely on NODE_PATH.
+ */
+exports.setup = function (options, seedLink) {
+  dbm = options.dbmigrate;
+  type = dbm.dataType;
+  seed = seedLink;
+  Promise = options.Promise;
+};
+
+exports.up = function (db) {
+  var filePath = path.join(__dirname, 'sqls', '20231221002804-init-up.sql');
+  return new Promise(function (resolve, reject) {
+    fs.readFile(filePath, {encoding: 'utf-8'}, function (err, data) {
+      if (err) return reject(err);
+      console.log('received data: ' + data);
+
+      resolve(data);
+    });
+  }).then(function (data) {
+    return db.runSql(data);
+  });
+};
+
+exports.down = function (db) {
+  var filePath = path.join(__dirname, 'sqls', '20231221002804-init-down.sql');
+  return new Promise(function (resolve, reject) {
+    fs.readFile(filePath, {encoding: 'utf-8'}, function (err, data) {
+      if (err) return reject(err);
+      console.log('received data: ' + data);
+
+      resolve(data);
+    });
+  }).then(function (data) {
+    return db.runSql(data);
+  });
+};
+
+exports._meta = {
+  version: 1,
+};

services/chat-service/migrations/mysql/migrations/sqls/20231221002804-init-down.sql

@@ -0,0 +1,11 @@
+-- Removing foreign keys
+ALTER TABLE messages
+DROP FOREIGN KEY fk_messages_messages;
+
+ALTER TABLE message_recipients
+DROP FOREIGN KEY fk_message_recipients_messages;
+
+-- Deleting tables
+DROP TABLE IF EXISTS audit_logs;
+DROP TABLE IF EXISTS messages;
+DROP TABLE IF EXISTS message_recipients;