From e2580aedeabb37ed4fe1f64ce10215387887fa35 Mon Sep 17 00:00:00 2001
From: ralf <rb@egroupware.org>
Date: Tue, 9 May 2023 10:47:35 +0200
Subject: [PATCH] * Mail: work around Firefox not offering an option to not ask
 again installing EGroupware as mail-handler

---
 api/js/jsapi/egw_config.js | 46 +++++++++++++++++++++++++++++++++++---
 api/lang/egw_de.lang       |  2 ++
 api/lang/egw_en.lang       |  2 ++
 3 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/api/js/jsapi/egw_config.js b/api/js/jsapi/egw_config.js
index 5a63afa5f3..c602964273 100644
--- a/api/js/jsapi/egw_config.js
+++ b/api/js/jsapi/egw_config.js
@@ -33,11 +33,51 @@ egw.extend('config', egw.MODULE_GLOBAL, function()
 	function install_mailto_handler()
 	{
 		if (document.location.href.match(/(\?|&)cd=yes(&|$)/) &&
+			!window.sessionStorage.getItem('asked-mailto-handler') &&
 			typeof navigator.registerProtocolHandler === 'function')	// eg. Safari 15.5 does NOT implement it
 		{
-			let url = egw_webserverUrl;
-			if (url[0] === '/') url = document.location.protocol+'://'+document.location.hostname+(url !== '/' ? url : '');
-			navigator.registerProtocolHandler('mailto', url+'/index.php?menuaction=mail.mail_compose.compose&preset[mailto]=%s', 'Mail');
+			const _ask_mailto_handler = () => {
+				let url = egw_webserverUrl;
+				if (url[0] === '/') url = document.location.protocol+'://'+document.location.hostname+(url !== '/' ? url : '');
+				navigator.registerProtocolHandler('mailto', url+'/index.php?menuaction=mail.mail_compose.compose&preset[mailto]=%s', 'Mail');
+				// remember not to ask again for this "session"
+				window.sessionStorage.setItem('asked-mailto-handler', 'yes');
+			};
+			// FF does not support user to opt out of the mailto-handler / have a "Don't ask me again" option,
+			// so we add that ourselves here for Firefox only:
+			if (navigator.userAgent.match(/firefox/i) && !navigator.userAgent.match(/chrome/i))
+			{
+				if (window.localStorage.getItem('asked-mailto-handler'))
+				{
+					return;
+				}
+				const dialog = window.Et2Dialog;
+				if (typeof dialog === 'undefined')
+				{
+					window.setTimeout(install_mailto_handler.bind(this), 1000);
+					return;
+				}
+				dialog.show_dialog((_button) =>
+				{
+					switch(_button)
+					{
+						case dialog.YES_BUTTON:
+							_ask_mailto_handler();
+							// fall through
+						case dialog.NO_BUTTON:
+							window.localStorage.setItem('asked-mailto-handler', _button == dialog.YES_BUTTON ? 'answer-was-yes' : 'answer-was-no');
+							break;
+						case dialog.CANCEL_BUTTON:
+							// ask again next session ...
+							window.sessionStorage.setItem('asked-mailto-handler', 'yes');
+					}
+				}, egw.lang('Answering no will not ask you again for this browser.'), egw.lang('Install EGroupware as mail-handler?'),
+					undefined, dialog.BUTTONS_YES_NO_CANCEL);
+			}
+			else
+			{
+				_ask_mailto_handler();
+			}
 		}
 	}
 
diff --git a/api/lang/egw_de.lang b/api/lang/egw_de.lang
index c560ae843f..fe94df1c1b 100644
--- a/api/lang/egw_de.lang
+++ b/api/lang/egw_de.lang
@@ -137,6 +137,7 @@ and	common	de	UND
 andorra	common	de	ANDORRA
 angola	common	de	ANGOLA
 anguilla	common	de	ANGUILLA
+answering no will not ask you again for this browser.	common	de	Wenn Sie mit Nein antworten, werden Sie für diesen Browser nicht mehr gefragt.
 antarctica	common	de	ANTARKTIS
 antigua and barbuda	common	de	ANTIGUA UND BARBUDA
 api	common	de	EGroupware API
@@ -738,6 +739,7 @@ insert row after	common	de	Zeile danach einfügen
 insert row before	common	de	Zeile davor einfügen
 insert timestamp into description field	common	de	Zeitstempel in das Beschreibungs-Feld einfügen
 install	common	de	Installieren
+install egroupware as mail-handler?	common	de	EGroupware als Mail-Handler installieren?
 integer	common	de	Ganzzahl
 international	common	de	International
 introduction	common	de	Einführung
diff --git a/api/lang/egw_en.lang b/api/lang/egw_en.lang
index 88f91b825b..a838b69110 100644
--- a/api/lang/egw_en.lang
+++ b/api/lang/egw_en.lang
@@ -137,6 +137,7 @@ and	common	en	AND
 andorra	common	en	ANDORRA
 angola	common	en	ANGOLA
 anguilla	common	en	ANGUILLA
+answering no will not ask you again for this browser.	common	en	Answering no will not ask you again for this browser.
 antarctica	common	en	ANTARCTICA
 antigua and barbuda	common	en	ANTIGUA AND BARBUDA
 api	common	en	EGroupware API
@@ -738,6 +739,7 @@ insert row after	common	en	Insert row after
 insert row before	common	en	Insert row before
 insert timestamp into description field	common	en	Insert timestamp into description field
 install	common	en	Install
+install egroupware as mail-handler?	common	en	Install EGroupware as mail-handler?
 integer	common	en	Integer
 international	common	en	International
 introduction	common	en	Introduction