Provide email address verification feature (#2481)

* Add an email field to the profile page

I reuse the `mail_login` from the configuration. I'm not sure if it's
useful today (I would say it was used when Persona login was available).

A good improvement would be to rename `mail_login` into `email` so it
would be more intuitive to use.

* Add boolean to the conf to force email validation

This commit only adds a configuration item.

* Add email during registration if email must be validated

* Set email token to validate when email changes

* Block access to FreshRSS if email is not validated

* Send email when address is changed

* Allow to resend the validation email

* Allow the user to change its email while blocked

* Document the email validation feature

* fixup! Allow the user to change its email while blocked

* tec: Autoload PHPMailer lib

* Validate email address format

* Add feedback on validation email resend action

* Allow to logout when user is blocked

* fix: Change default email "from"

* Reorganize i18n keys

* Complete all the locales with default english

* Hide sidebar (profile page) if email is not validated

* Check email requirements on registration

* Allow admin to specify email when creating users

* Don't check email format if value is empty

* Remove trailing comma in userController

Co-Authored-By: Alexandre Alapetite <alexandre@alapetite.fr>

* Set PHPMailer validator to html5 before sending email

* fixup! Remove trailing comma in userController

4 files changed, 35 insertions, 0 deletions

diff --git a/app/i18n/kr/admin.php b/app/i18n/kr/admin.php
index 6312bd3fe..4a8e425d5 100644
--- a/app/i18n/kr/admin.php
+++ b/app/i18n/kr/admin.php
@@ -159,6 +159,7 @@ return array(
 	'system' => array(
 		'_' => '시스템 설정',
 		'auto-update-url' => '자동 업데이트 서버 URL',
+		'force_email_validation' => 'Force email addresses validation', //TODO - Translation
 		'instance-name' => '인스턴스 이름',
 		'max-categories' => '사용자별 카테고리 개수 제한',
 		'max-feeds' => '사용자별 피드 개수 제한',
diff --git a/app/i18n/kr/conf.php b/app/i18n/kr/conf.php
index 1efaee88b..397d57418 100644
--- a/app/i18n/kr/conf.php
+++ b/app/i18n/kr/conf.php
@@ -46,6 +46,7 @@ return array(
 			'_' => '계정 삭제',
 			'warn' => '당신의 계정과 관련된 모든 데이터가 삭제됩니다.',
 		),
+		'email' => '메일 주소',
 		'password_api' => 'API 암호<br /><small>(예: 모바일 애플리케이션)</small>',
 		'password_form' => '암호<br /><small>(웹폼 로그인 방식 사용시)</small>',
 		'password_format' => '7 글자 이상이어야 합니다',
diff --git a/app/i18n/kr/gen.php b/app/i18n/kr/gen.php
index 72b95fa6e..979cb9ffa 100644
--- a/app/i18n/kr/gen.php
+++ b/app/i18n/kr/gen.php
@@ -3,6 +3,7 @@
 return array(
 	'action' => array(
 		'actualize' => '새 글 가져오기',
+		'back' => '← Go back', //TODO - Translation
 		'back_to_rss_feeds' => '← RSS 피드로 돌아가기',
 		'cancel' => '취소',
 		'create' => '생성',
diff --git a/app/i18n/kr/user.php b/app/i18n/kr/user.php
new file mode 100644
index 000000000..4f2cfcda2
--- /dev/null
+++ b/app/i18n/kr/user.php
@@ -0,0 +1,32 @@
+<?php
+
+return array(
+	'email' => array(
+		'feedback' => array(
+			'invalid' => 'The email address is invalid.', //TODO - Translation
+			'required' => 'The email address is required.', //TODO - Translation
+		),
+		'validation' => array(
+			'change_email' => 'You can change your email address <a href="%s">on the profile page</a>.', //TODO - Translation
+			'email_sent_to' => 'We sent you an email at <strong>%s</strong>, please follow its indications to validate your address.', //TODO - Translation
+			'feedback' => array(
+				'email_failed' => 'We couldn’t send you an email because of a misconfiguration of the server.', //TODO - Translation
+				'email_sent' => 'An email has been sent to your address.', //TODO - Translation
+				'error' => 'The email address failed to be validated.', //TODO - Translation
+				'ok' => 'The email address has been validated.', //TODO - Translation
+				'unneccessary' => 'The email address was already validated.', //TODO - Translation
+				'wrong_token' => 'The email address failed to be validated due to a wrong token.', //TODO - Translation
+			),
+			'need_to' => 'You need to validate your email address before being able to use %s.', //TODO - Translation
+			'resend_email' => 'Resend the email', //TODO - Translation
+			'title' => 'Email address validation', //TODO - Translation
+		),
+	),
+	'mailer' => array(
+		'email_need_validation' => array(
+			'title' => 'You need to validate your account', //TODO - Translation
+			'welcome' => 'Welcome %s,', //TODO - Translation
+			'body' => 'You’ve just registered on %s but you still need to validate your email. For that, just follow the link:', //TODO - Translation
+		),
+	),
+);