From faf79d737f268b091533075d13932afe10ac80a2 Mon Sep 17 00:00:00 2001
From: Gael <gael@shippabo.com>
Date: Fri, 7 Dec 2018 09:06:59 -0800
Subject: [PATCH] Add some examples from presentation slides

---
 examples/activeRecord.js            | 33 +++++++++++++++++++++++++++++
 examples/framework.txt              | 20 +++++++++++++++++
 examples/inversionOfControl/bad.js  | 16 ++++++++++++++
 examples/inversionOfControl/good.js | 18 ++++++++++++++++
 4 files changed, 87 insertions(+)
 create mode 100644 examples/activeRecord.js
 create mode 100644 examples/framework.txt
 create mode 100644 examples/inversionOfControl/bad.js
 create mode 100644 examples/inversionOfControl/good.js

diff --git a/examples/activeRecord.js b/examples/activeRecord.js
new file mode 100644
index 0000000..f9a356c
--- /dev/null
+++ b/examples/activeRecord.js
@@ -0,0 +1,33 @@
+const mongoose = require('mongoose');
+
+const Schema = mongoose.Schema;
+
+const UserSchema = new Schema({
+  name: { type: String, default: '' },
+  email: { type: String, default: '' },
+  role: { type: String, enum: ['USER', 'ADMIN'] },
+});
+
+UserSchema.pre('save', function(next) {
+  if (!this.isNew) return next();
+
+  if (this.role != 'ADMIN' && this.email.endsWith('@admins.com')) {
+    next(new Error('Only admins can use @admins.com emails'));
+  } else {
+    next();
+  }
+});
+
+UserSchema.methods = {
+  isAdmin: function() {
+    return this.role === 'ADMIN';
+  },
+};
+
+UserSchema.statics = {
+  findByEmail: function(email) {
+    return this.findOne({ email });
+  },
+};
+
+mongoose.model('User', UserSchema);
diff --git a/examples/framework.txt b/examples/framework.txt
new file mode 100644
index 0000000..99e903e
--- /dev/null
+++ b/examples/framework.txt
@@ -0,0 +1,20 @@
+/src
+    /controllers
+        /user.js
+        /company.js
+        /product.js
+        /cart.js
+    /views
+        /user.js
+        /company.js
+        /product.js
+        /cart.js
+    /models
+        /user.js
+        /company.js
+        /product.js
+        /cart.js
+
+
+
+        
\ No newline at end of file
diff --git a/examples/inversionOfControl/bad.js b/examples/inversionOfControl/bad.js
new file mode 100644
index 0000000..e5e26f5
--- /dev/null
+++ b/examples/inversionOfControl/bad.js
@@ -0,0 +1,16 @@
+const dbClient = require('dbClient');
+const notificationService = require('notificationService');
+
+async function someUseCase() {
+  const account = await dbClient.collection('accounts').findOne({
+    _id: 'someId',
+  });
+
+  if (account.type === 'USER') {
+    notificationService.sendNotification(account);
+  }
+}
+
+module.exports = {
+  someUseCase,
+};
diff --git a/examples/inversionOfControl/good.js b/examples/inversionOfControl/good.js
new file mode 100644
index 0000000..e71898b
--- /dev/null
+++ b/examples/inversionOfControl/good.js
@@ -0,0 +1,18 @@
+module.exports = ({
+  accountCollection: { findAccount },
+  notificationService: { sendNotification },
+}) => {
+  async function someUseCase() {
+    const account = await findAccount({
+      _id: 'someId',
+    });
+
+    if (account.type === 'USER') {
+      sendNotification(account);
+    }
+  }
+
+  return {
+    someUseCase,
+  };
+};