Added token, user, userRepository and userSecurity in user folder. This handles creating new users, loging in and creating a user specific token then returning it when logging in.

seasoned_api/src/user/userRepository.js

@@ -0,0 +1,59 @@
+const assert = require('assert');
+const establishedDatabase = require('src/database/database');
+
+class UserRepository {
+
+  constructor(database) {
+    this.database = database || establishedDatabase;
+    this.queries = {
+      read: 'select * from user where lower(user_name) = lower(?)',
+      create: 'insert into user (user_name, email) values(?, ?)',
+      change: 'update user set password = ? where user_name = ?',
+      retrieveHash: 'select * from user where user_name = ?',
+    };
+  }
+
+  /**
+   * Create a user in a database.
+   * @param {User} user the user you want to create
+   * @returns {Promise}
+   */
+  create(user) {
+    return Promise.resolve()
+    .then(() => this.database.get(this.queries.read, user.username))
+    .then(row => assert.equal(row, undefined))
+    .then(() => this.database.run(this.queries.create, [user.username, user.email]))
+    .catch((error) => {
+      if (error.message.endsWith('email')) {
+        throw new Error('That email is already taken');
+      } else if (error.name === 'AssertionError' || error.message.endsWith('user_name')) {
+        throw new Error('That username is already taken');
+      }
+    });
+  }
+
+  /**
+   * Retrieve a password from a database.
+   * @param {User} user the user you want to retrieve the password
+   * @returns {Promise}
+   */
+  retrieveHash(user) {
+    return this.database.get(this.queries.retrieveHash, user.username).then((row) => {
+      assert(row, 'The user does not exist.');
+      return row.password;
+    });
+  }
+
+  /**
+   * Change a user's password in a database.
+   * @param {User} user the user you want to create
+   * @param {String} password the new password you want to change
+   * @returns {Promise}
+   */
+  changePassword(user, password) {
+    return this.database.run(this.queries.change, [password, user.username]);
+  }
+
+}
+
+module.exports = UserRepository;