injecting dependencies to controllers

src/controllers/index.js

@@ -6,9 +6,6 @@
 
 // Public npm libraries.
 
-// Load the REST API Controllers.
-const boilerplateRESTControllers = require('./rest-api')
-
 // Load the Clean Architecture Adapters library
 const adapters = require('../adapters')
 
@@ -19,6 +16,9 @@ const JSONRPC = require('./json-rpc')
 const UseCases = require('../use-cases')
 const useCases = new UseCases({ adapters })
 
+// Load the REST API Controllers.
+const RESTControllers = require('./rest-api')
+
 // Top-level function for this library.
 // Start the various Controllers and attach them to the app.
 async function attachControllers (app) {
@@ -32,8 +32,13 @@ async function attachControllers (app) {
 }
 
 function attachRESTControllers (app) {
+  const rESTControllers = new RESTControllers({
+    adapters,
+    useCases
+  })
+
   // Attach the REST API Controllers associated with the boilerplate code to the Koa app.
-  boilerplateRESTControllers.attachRESTControllers(app)
+  rESTControllers.attachRESTControllers(app)
 }
 
 // Add the JSON RPC router to the ipfs-coord adapter.

src/controllers/rest-api/index.js

@@ -12,22 +12,45 @@ const UserRESTController = require('./users')
 const ContactRESTController = require('./contact')
 const LogsRESTController = require('./logs')
 
-function attachRESTControllers (app) {
-  // Attach the REST API Controllers associated with the /auth route
-  const authRESTController = new AuthRESTController()
-  authRESTController.attach(app)
+class RESTControllers {
+  constructor (localConfig) {
+    // Dependency Injection.
+    this.adapters = localConfig.adapters
+    if (!this.adapters) {
+      throw new Error(
+        'Instance of Adapters library required when instantiating PostEntry REST Controller.'
+      )
+    }
+    this.useCases = localConfig.useCases
+    if (!this.useCases) {
+      throw new Error(
+        'Instance of Use Cases library required when instantiating PostEntry REST Controller.'
+      )
+    }
+  }
 
-  // Attach the REST API Controllers associated with the /user route
-  const userRESTController = new UserRESTController()
-  userRESTController.attach(app)
+  attachRESTControllers (app) {
+    const dependencies = {
+      adapters: this.adapters,
+      useCases: this.useCases
+    }
 
-  // Attach the REST API Controllers associated with the /contact route
-  const contactRESTController = new ContactRESTController()
-  contactRESTController.attach(app)
+    // Attach the REST API Controllers associated with the /auth route
+    const authRESTController = new AuthRESTController(dependencies)
+    authRESTController.attach(app)
 
-  // Attach the REST API Controllers associated with the /logs route
-  const logsRESTController = new LogsRESTController()
-  logsRESTController.attach(app)
+    // Attach the REST API Controllers associated with the /user route
+    const userRESTController = new UserRESTController(dependencies)
+    userRESTController.attach(app)
+
+    // Attach the REST API Controllers associated with the /contact route
+    const contactRESTController = new ContactRESTController(dependencies)
+    contactRESTController.attach(app)
+
+    // Attach the REST API Controllers associated with the /logs route
+    const logsRESTController = new LogsRESTController(dependencies)
+    logsRESTController.attach(app)
+  }
 }
 
-module.exports = { attachRESTControllers }
+module.exports = RESTControllers