feat(auth): migrate Application model from MongoDB to MySQL

- Add Sequelize migration creating the 'application' table
- Add Application Sequelize model with slugify, toJSONFor, toAuthJSON
- Rewrite passport-headerapikey strategy to use DB.Application
- Rewrite applications.routes.js to use Sequelize (findAll, count,
  build/save, destroy) instead of Mongoose
- Fix pre-existing bug: passport was querying { encryptedKey } but the
  stored field is named 'apikey'
- Add Application to MySQL models index and relationships
- Remove Application from Mongoose models index and delete the schema

src/database/models/mysql/Application.js

@@ -0,0 +1,103 @@
+const { DataTypes, Model } = require('sequelize');
+const { v4: uuidv4 } = require('uuid');
+const slug = require('slug');
+
+const sequelize = require('../../config/sequelize');
+
+class Application extends Model {}
+
+const ApplicationModel = () => {
+    Application.init(
+        {
+            id: {
+                type: DataTypes.STRING(36),
+                allowNull: false,
+                primaryKey: true
+            },
+            apikey: {
+                type: DataTypes.STRING(255),
+                allowNull: false
+            },
+            maskedkey: {
+                type: DataTypes.STRING(20),
+                allowNull: true
+            },
+            slug: {
+                type: DataTypes.STRING(255),
+                allowNull: false,
+                unique: 'slug'
+            },
+            title: {
+                type: DataTypes.STRING(255),
+                allowNull: false
+            },
+            description: {
+                type: DataTypes.TEXT,
+                allowNull: true
+            },
+            authorId: {
+                type: DataTypes.STRING(36),
+                allowNull: true
+            }
+        },
+        {
+            sequelize,
+            tableName: 'application',
+            timestamps: true,
+            indexes: [
+                {
+                    name: 'PRIMARY',
+                    unique: true,
+                    using: 'BTREE',
+                    fields: [{ name: 'id' }]
+                },
+                {
+                    name: 'slug',
+                    unique: true,
+                    using: 'BTREE',
+                    fields: [{ name: 'slug' }]
+                }
+            ]
+        }
+    );
+
+    Application.beforeCreate((application) => {
+        application.id = uuidv4();
+        if (!application.slug) {
+            application.slugify();
+        }
+        application.slug = application.slug.toLowerCase();
+    });
+
+    Application.prototype.slugify = function () {
+        this.slug = slug(this.title) + '-' + (Math.random() * Math.pow(36, 6) | 0).toString(36);
+    };
+
+    Application.prototype.toJSONFor = function (user) {
+        return {
+            maskedkey: this.maskedkey,
+            slug: this.slug,
+            title: this.title,
+            description: this.description,
+            createdAt: this.createdAt,
+            updatedAt: this.updatedAt,
+            author: user ? user.toProfileJSONFor() : this.authorId ?? null
+        };
+    };
+
+    Application.prototype.toAuthJSON = function () {
+        return {
+            maskedkey: this.maskedkey,
+            slug: this.slug,
+            title: this.title,
+            description: this.description,
+            createdAt: this.createdAt,
+            updatedAt: this.updatedAt,
+            author: this.authorId ?? null
+        };
+    };
+
+    return Application;
+};
+
+module.exports = ApplicationModel;

src/database/models/mysql/index.js

@@ -1,3 +1,4 @@
+exports.Application = require('./Application');
 exports.Article = require('./Article');
 //exports.ArticleTag = require('./ArticleTag');
 exports.Brand = require('./Brand');