From 120873c7d66415fe88414c0b92c503abbd45e03a Mon Sep 17 00:00:00 2001
From: the-djmaze <>
Date: Mon, 28 Aug 2023 13:34:23 +0200
Subject: [PATCH] Added "View ICS" extension #1178

---
 plugins/view-ics/LICENSE    |  20 +++++++
 plugins/view-ics/index.php  |  18 ++++++
 plugins/view-ics/message.js | 113 ++++++++++++++++++++++++++++++++++++
 3 files changed, 151 insertions(+)
 create mode 100644 plugins/view-ics/LICENSE
 create mode 100644 plugins/view-ics/index.php
 create mode 100644 plugins/view-ics/message.js

diff --git a/plugins/view-ics/LICENSE b/plugins/view-ics/LICENSE
new file mode 100644
index 000000000..9e5e56cdd
--- /dev/null
+++ b/plugins/view-ics/LICENSE
@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2022 SnappyMail
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/plugins/view-ics/index.php b/plugins/view-ics/index.php
new file mode 100644
index 000000000..febaeb875
--- /dev/null
+++ b/plugins/view-ics/index.php
@@ -0,0 +1,18 @@
+<?php
+
+class ViewICSPlugin extends \RainLoop\Plugins\AbstractPlugin
+{
+	const
+		NAME = 'View ICS',
+		VERSION = '2.0',
+		RELEASE  = '2023-08-28',
+		CATEGORY = 'Messages',
+		DESCRIPTION = 'Display ICS attachment details',
+		REQUIRED = '2.27.0';
+
+	public function Init() : void
+	{
+//		$this->UseLangs(true);
+		$this->addJs('message.js');
+	}
+}
diff --git a/plugins/view-ics/message.js b/plugins/view-ics/message.js
new file mode 100644
index 000000000..cb768402e
--- /dev/null
+++ b/plugins/view-ics/message.js
@@ -0,0 +1,113 @@
+(rl => {
+	const templateId = 'MailMessageView';
+
+	addEventListener('rl-view-model.create', e => {
+		if (templateId === e.detail.viewModelTemplateID) {
+
+			const
+				template = document.getElementById(templateId),
+				view = e.detail,
+				attachmentsPlace = template.content.querySelector('.attachmentsPlace'),
+				dateRegEx = /(TZID=(?<tz>[^:]+):)?(?<year>[0-9]{4})(?<month>[0-9]{2})(?<day>[0-9]{2})T(?<hour>[0-9]{2})(?<minute>[0-9]{2})(?<second>[0-9]{2})(?<utc>Z?)/;
+
+			attachmentsPlace.after(Element.fromHTML(`
+			<details data-bind="if: viewICS, visible: viewICS">
+				<summary data-icon="📅" data-bind="text: viewICS().SUMMARY"></summary>
+				<table><tbody style="white-space:pre">
+					<tr data-bind="visible: viewICS().ORGANIZER"><td>Organizer</td><td data-bind="text: viewICS().ORGANIZER"></td></tr>
+					<tr><td>Start</td><td data-bind="text: viewICS().DTSTART"></td></tr>
+					<tr><td>End</td><td data-bind="text: viewICS().DTEND"></td></tr>
+<!--				<tr><td>Transparency</td><td data-bind="text: viewICS().TRANSP"></td></tr>-->
+					<tr data-bind="foreach: viewICS().ATTENDEE">
+						<td></td><td data-bind="text: $data.replace(/;/g,';\\n')"></td>
+					</tr>
+				</tbody></table>
+			</details>`));
+
+			view.viewICS = ko.observable(null);
+
+			/**
+			 * TODO
+			 */
+			view.message.subscribe(msg => {
+				view.viewICS(null);
+				if (msg) {
+//					let ics = msg.attachments.find(attachment => 'application/ics' == attachment.mimeType);
+					let ics = msg.attachments.find(attachment => 'text/calendar' == attachment.mimeType);
+					if (ics && ics.download) {
+						// fetch it and parse the VEVENT
+						rl.fetch(ics.linkDownload())
+						.then(response => (response.status < 400) ? response.text() : Promise.reject(new Error({ response })))
+						.then(text => {
+							let VEVENT,
+								VALARM,
+								multiple = ['ATTACH','ATTENDEE','CATEGORIES','COMMENT','CONTACT','EXDATE',
+									'EXRULE','RSTATUS','RELATED','RESOURCES','RDATE','RRULE'],
+								lines = text.split(/\r?\n/),
+								i = lines.length;
+							while (i--) {
+								let line = lines[i];
+								if (VEVENT) {
+									while (line.startsWith(' ') && i--) {
+										line = lines[i] + line.slice(1);
+									}
+									if (line.startsWith('END:VALARM')) {
+										VALARM = {};
+										continue;
+									} else if (line.startsWith('BEGIN:VALARM')) {
+										VEVENT.VALARM || (VEVENT.VALARM = []);
+										VEVENT.VALARM.push(VALARM);
+										VALARM = null;
+										continue;
+									} else if (line.startsWith('BEGIN:VEVENT')) {
+										break;
+									}
+									line = line.match(/^([^:;]+)[:;](.+)$/);
+									if (line) {
+										if (VALARM) {
+											VALARM[line[1]] = line[2];
+										} else if (multiple.includes(line[1]) || 'X-' == line[1].slice(0,2)) {
+											VEVENT[line[1]] || (VEVENT[line[1]] = []);
+											VEVENT[line[1]].push(line[2]);
+										} else {
+											if ('DTSTART' === line[1] || 'DTEND' === line[1]) {
+												let parts = dateRegEx.exec(line[2])?.groups,
+													options = {dateStyle: 'long', timeStyle: 'short'};
+												parts.tz && (options.timeZone = parts.tz);
+												line[2] = new Date(
+													parseInt(parts.year, 10),
+													parseInt(parts.month, 10) - 1,
+													parseInt(parts.day, 10),
+													parseInt(parts.hour, 10),
+													parseInt(parts.minute, 10),
+													parseInt(parts.second, 10)
+												).format(options);
+											}
+											VEVENT[line[1]] = line[2];
+										}
+									}
+								} else if (line.startsWith('END:VEVENT')) {
+									VEVENT = {};
+								}
+							}
+//							METHOD:REPLY || METHOD:REQUEST
+//							console.dir({VEVENT:VEVENT});
+							if (VEVENT) {
+								VEVENT.rawText = text;
+								VEVENT.isCancelled = () => VEVENT.STATUS?.includes('CANCELLED');
+								VEVENT.isConfirmed = () => VEVENT.STATUS?.includes('CONFIRMED');
+								VEVENT.shouldReply = () => VEVENT.METHOD?.includes('REPLY');
+								console.dir({
+									isCancelled: VEVENT.isCancelled(),
+									shouldReply: VEVENT.shouldReply()
+								});
+								view.viewICS(VEVENT);
+							}
+						});
+					}
+				}
+			});
+		}
+	});
+
+})(window.rl);