move defined errors into top-level errors.js file

errors.js

@@ -0,0 +1,40 @@
+// ErrPasswordTooShort is returned when the password length is too short.
+const ErrPasswordTooShort = new Error('password must be at least 8 characters');
+ErrPasswordTooShort.translation_key = 'PASSWORD_LENGTH';
+ErrPasswordTooShort.status = 400;
+
+const ErrMissingEmail = new Error('email is required');
+ErrMissingEmail.translation_key = 'EMAIL_REQUIRED';
+ErrMissingEmail.status = 400;
+
+const ErrMissingPassword = new Error('password is required');
+ErrMissingPassword.translation_key = 'PASSWORD_REQUIRED';
+ErrMissingPassword.status = 400;
+
+const ErrEmailTaken = new Error('Email address already in use');
+ErrEmailTaken.translation_key = 'EMAIL_IN_USE';
+ErrEmailTaken.status = 400;
+
+const ErrSpecialChars = new Error('No special characters are allowed in a display name');
+ErrSpecialChars.translation_key = 'NO_SPECIAL_CHARACTERS';
+ErrSpecialChars.status = 400;
+
+const ErrMissingDisplay = new Error('A display name is required to create a user');
+ErrMissingDisplay.translation_key = 'DISPLAY_NAME_REQUIRED';
+ErrMissingDisplay.status = 400;
+
+// ErrContainsProfanity is returned in the event that the middleware detects
+// profanity/wordlisted words in the payload.
+const ErrContainsProfanity = new Error('Suspected profanity. If you think this in error, please let us know!');
+ErrContainsProfanity.translation_key = 'PROFANITY_ERROR';
+ErrContainsProfanity.status = 400;
+
+module.exports = {
+  ErrPasswordTooShort,
+  ErrMissingEmail,
+  ErrMissingPassword,
+  ErrEmailTaken,
+  ErrSpecialChars,
+  ErrMissingDisplay,
+  ErrContainsProfanity
+};