refactor(sandbox): refactor feature toggle example sandbox (#2236)

* refactor(feature-toggle): refactor code

refactor code

MIGRATION CHANGE:
migration-20230612141912- refactor code
migration-20210913104858- refactor code

0

* refactor(feature-toggle): lint issues

lint issues

0
lint issues

Author: vipul-sourcefuse

sandbox/feature-toggle-example/README.md

@@ -3,30 +3,45 @@
 This application is generated using [LoopBack 4 CLI](https://loopback.io/doc/en/lb4/Command-line-interface.html) with the
 [initial project layout](https://loopback.io/doc/en/lb4/Loopback-application-layout.html).
 
-## Install dependencies
+## STEP 1: Install dependencies
 
-By default, dependencies were installed when this application was generated.
-Whenever dependencies in `package.json` are changed, run the following command:
+To install the project dependencies, run the following command:
 
 ```sh
 npm install
 ```
+## STEP 2: Set up Environment Variables
+1. Copy the .env.example file to .env:
 
-To only install resolved dependencies in `package-lock.json`:
+```sh
+cp .env.example .env
+```
+2. Open the .env file and configure the necessary environment variables (e.g., database connection settings, JWT secret keys).
 
+## STEP 3: Database Migration
+Run the following command to migrate the database:
 ```sh
-npm ci
+npm run db:migrate
 ```
 
-## Run the application
+## STEP 4: Set up JWT Asymmetric Authentication
+This project uses JWT tokens for authentication. Ensure you have the following:
+* A private key (JWT_PRIVATE_KEY) for signing the JWT tokens.
+* A public key (JWT_PUBLIC_KEY) for verifying the JWT tokens.
+
+Add these keys to the .env file or ensure they are properly configured in your authentication service.
 
+## STEP 5: Start the application
+Once everything is set up, you can start the Node.js application with the following command:
 ```sh
 npm start
 ```
+This will start the server, and you can begin testing the API.
 
-You can also run `node .` to skip the build step.
+## STEP 6: Testing the API
+After starting the application, you can test the API using Swagger UI. Open your browser and visit:
 
-Open http://127.0.0.1:3000 in your browser.
+http://127.0.0.1:3000 Replace the URL according to your configuration
 
 ## Rebuild the project
 
@@ -55,8 +70,6 @@ npm run lint:fix
 ```
 
 ## Other useful commands
-
-- `npm run migrate`: Migrate database schemas for models
 - `npm run openapi-spec`: Generate OpenAPI spec into a file
 - `npm run docker:build`: Build a Docker image for this application
 - `npm run docker:run`: Run this application inside a Docker container
@@ -67,6 +80,11 @@ npm run lint:fix
 npm test
 ```
 
+## Troubleshooting
+* Ensure that your database is correctly configured and running.
+* Make sure that the JWT private and public keys are properly set up in the .env file.
+* If you encounter issues with Swagger UI not loading, verify that the server has successfully started and that the correct port is specified.
+
 ## What's next
 
 Please check out [LoopBack 4 documentation](https://loopback.io/doc/en/lb4/) to

sandbox/feature-toggle-example/migrations/20230612141912-update-tables.js

@@ -0,0 +1,59 @@
+'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',
+    '20230612141912-update-tables-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',
+    '20230612141912-update-tables-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,
+};

sandbox/feature-toggle-example/migrations/sqls/20210913104858-initial-up.sql

@@ -5,28 +5,30 @@ GRANT ALL ON SCHEMA main TO public;
 
 CREATE TABLE main.features (
 	id                   uuid DEFAULT md5(random()::text || clock_timestamp()::text)::uuid NOT NULL,
-	name            varchar(50)  NOT NULL ,
-	key            varchar(50)  NOT NULL ,
-	description        varchar(50) ,
-	default_value         bool DEFAULT true NOT NULL ,
+	name            	 text  NOT NULL ,
+	key            		 text  NOT NULL ,
+	description        	 text ,
+	default_value        text ,
+	type		 		 text ,
 	CONSTRAINT pk_features_id PRIMARY KEY ( id )
  );
 
  CREATE TABLE main.strategies (
 	id                   uuid DEFAULT md5(random()::text || clock_timestamp()::text)::uuid NOT NULL,
-	name            varchar(50)  NOT NULL ,
-	key            varchar(50)  NOT NULL ,
-	priority        integer ,
+	name            	 text  NOT NULL ,
+	key            		 text  NOT NULL ,
+	priority        	 integer ,
 	CONSTRAINT pk_strategies_id PRIMARY KEY ( id )
  );
 
- CREATE TABLE main.feature_toggles (
-	id                   uuid DEFAULT md5(random()::text || clock_timestamp()::text)::uuid NOT NULL,
-	feature_key            varchar(50)  NOT NULL ,
+ CREATE TABLE main.feature_values (
+	id                   	uuid DEFAULT md5(random()::text || clock_timestamp()::text)::uuid NOT NULL,
+	feature_key             varchar(50)  NOT NULL ,
 	strategy_key            varchar(50)  NOT NULL ,
-  strategy_entity_id        uuid ,
-	status         bool DEFAULT true NOT NULL ,
-	CONSTRAINT pk_feature_toggles_id PRIMARY KEY ( id )
+    strategy_entity_id      uuid NULL,
+	status         			bool DEFAULT true NOT NULL ,
+	value 	             	text,
+	CONSTRAINT pk_feature_values_id PRIMARY KEY ( id )
  );
 
 INSERT INTO main.strategies(name, key, priority)
@@ -36,7 +38,4 @@ INSERT INTO main.strategies(name, key, priority)
 	VALUES ('Tenant', 'Tenant', '2');
 
 INSERT INTO main.strategies(name, key, priority)
-	VALUES ('User', 'User', '3');
-
-INSERT INTO main.features(name, key, default_value)
-  VALUES ('Calendar', 'Calendar', 'true');
+	VALUES ('User', 'User', '3');

sandbox/feature-toggle-example/migrations/sqls/20230612141912-update-tables-down.sql

@@ -0,0 +1,28 @@
+ALTER TABLE main.features
+drop column metadata,
+drop column created_by,
+drop column modified_by ,
+drop column created_on ,
+drop column modified_on 
+drop column deleted  ,
+drop column deleted_on ,
+drop column deleted_by;
+
+
+ALTER TABLE main.strategies
+drop column created_by,
+drop column modified_by ,
+drop column created_on ,
+drop column modified_on 
+drop column deleted  ,
+drop column deleted_on ,
+drop column deleted_by;
+
+ALTER TABLE main.feature_values
+drop column created_by,
+drop column modified_by ,
+drop column created_on ,
+drop column modified_on 
+drop column deleted  ,
+drop column deleted_on ,
+drop column deleted_by;

sandbox/feature-toggle-example/migrations/sqls/20230612141912-update-tables-up.sql

@@ -0,0 +1,29 @@
+/* Replace with your SQL commands */
+
+ALTER TABLE main.features
+ADD metadata TEXT,  
+ADD created_by varchar(100),
+ADD modified_by varchar(100),
+ADD created_on           timestamptz DEFAULT CURRENT_TIMESTAMP NOT NULL ,
+ADD modified_on          timestamptz DEFAULT CURRENT_TIMESTAMP NOT NULL ,
+ADD deleted              bool DEFAULT false NOT NULL ,
+ADD deleted_on           timestamptz   ,
+ADD deleted_by           uuid   ;
+
+ALTER TABLE main.strategies
+ADD created_by varchar(100),
+ADD modified_by varchar(100),
+ADD created_on           timestamptz DEFAULT CURRENT_TIMESTAMP NOT NULL ,
+ADD modified_on          timestamptz DEFAULT CURRENT_TIMESTAMP NOT NULL ,
+ADD deleted              bool DEFAULT false NOT NULL ,
+ADD deleted_on           timestamptz   ,
+ADD deleted_by           uuid   ;
+
+ALTER TABLE main.feature_values
+ADD created_by varchar(100),
+ADD modified_by varchar(100),
+ADD created_on           timestamptz DEFAULT CURRENT_TIMESTAMP NOT NULL ,
+ADD modified_on          timestamptz DEFAULT CURRENT_TIMESTAMP NOT NULL ,
+ADD deleted              bool DEFAULT false NOT NULL ,
+ADD deleted_on           timestamptz   ,
+ADD deleted_by           uuid   ;

sandbox/feature-toggle-example/package.json

@@ -35,9 +35,9 @@
         "start": "node -r source-map-support/register .",
         "clean": "lb-clean dist *.tsbuildinfo .eslintcache",
         "rebuild": "npm run clean && npm run build",
-        "db:migrate": "./node_modules/db-migrate/bin/db-migrate up --config './migrations/database.json'",
-        "db:migrate:down": "./node_modules/db-migrate/bin/db-migrate down --config './migrations/database.json'",
-        "db:migrate:reset": "./node_modules/db-migrate/bin/db-migrate reset --config './migrations/database.json'"
+        "db:migrate": "../../node_modules/db-migrate/bin/db-migrate up --config './migrations/database.json'",
+        "db:migrate:down": "../../node_modules/db-migrate/bin/db-migrate down --config './migrations/database.json'",
+        "db:migrate:reset": "../../node_modules/db-migrate/bin/db-migrate reset --config './migrations/database.json'"
     },
     "repository": {
         "type": "git",

sandbox/feature-toggle-example/src/application.ts

@@ -22,6 +22,14 @@ import {
 } from 'loopback4-authorization';
 import path from 'path';
 import {MySequence} from './sequence';
+import {
+  BearerVerifierBindings,
+  BearerVerifierComponent,
+  BearerVerifierConfig,
+  BearerVerifierType,
+  ServiceSequence,
+} from '@sourceloop/core';
+import {AuthenticationComponent} from 'loopback4-authentication';
 dotenv.config();
 
 export {ApplicationConfig};
@@ -46,10 +54,24 @@ export class FeatureToggleExampleApplication extends BootMixin(
 
     this.bind(FeatureToggleBindings.Config).to({
       bindControllers: true,
-      useCustomSequence: false,
+      useCustomSequence: true,
     });
     this.component(FeatureToggleServiceComponent);
 
+    this.sequence(ServiceSequence);
+
+    // Mount authentication component for default sequence
+    this.component(AuthenticationComponent);
+    // Mount bearer verifier component
+    this.bind(BearerVerifierBindings.Config).to({
+      authServiceUrl: '',
+      useSymmetricEncryption: true,
+      type: BearerVerifierType.service,
+    } as BearerVerifierConfig);
+    this.component(BearerVerifierComponent);
+
+    // Mount authorization component for default sequence
+
     this.bind(AuthorizationBindings.CONFIG).to({
       allowAlwaysPaths: ['/explorer'],
     });