Convert first files to TypeScript

Signed-off-by: David Mehren <dmehren1@gmail.com>

lib/models/author.ts

@@ -0,0 +1,44 @@
+// external modules
+import {DataTypes} from 'sequelize';
+
+
+function createAutorModel(sequelize) {
+  const Author = sequelize.define('Author', {
+    id: {
+      type: DataTypes.INTEGER,
+      primaryKey: true,
+      autoIncrement: true
+    },
+    color: {
+      type: DataTypes.STRING
+    }
+  }, {
+    indexes: [
+      {
+        unique: true,
+        fields: ['noteId', 'userId']
+      }
+    ]
+  });
+
+  Author.associate = function (models) {
+    Author.belongsTo(models.Note, {
+      foreignKey: 'noteId',
+      as: 'note',
+      constraints: false,
+      onDelete: 'CASCADE',
+      hooks: true
+    });
+    Author.belongsTo(models.User, {
+      foreignKey: 'userId',
+      as: 'user',
+      constraints: false,
+      onDelete: 'CASCADE',
+      hooks: true
+    })
+  };
+
+  return Author
+}
+
+export = createAutorModel