[IMPROVE] Quote fragment of a message

app/ui-message/client/message.html

@@ -95,7 +95,7 @@
 						<span class="toggle-hidden icon-right-dir" data-message="{{msg._id}}"> {{_ "Message_Ignored"}} </span>
 					{{/if}}
 				</div>
-				<div class="body {{bodyClass}}" dir="auto" data-unread-text="{{_ "Unread_Messages"}}">
+				<div id="selectable" class="body {{bodyClass}}" dir="auto" data-unread-text="{{_ "Unread_Messages"}}">
 					{{#if isSnippet}}
 						<div class="snippet-name">{{_ "Snippet_name"}}: {{snippetName}}</div>
 					{{/if}}
@@ -126,7 +126,7 @@
 			{{#if msg.drid}}
 				{{> DiscussionMetric count=msg.dcount drid=msg.drid lm=msg.dlm openDiscussion=actions.openDiscussion }}
 			{{/if}}
-			
+
 			{{#if $and settings.showReplyButton msg.tcount}}
 			    {{> ThreadMetric counter=msg.tcount following=following lm=msg.tlm rid=msg.rid mid=msg._id unread=unread mention=mention all=all openThread=actions.openThread }}
 			{{/if}}

app/ui-message/client/message.js

@@ -54,6 +54,19 @@ const renderBody = (msg, settings) => {
 	return msg;
 };
 
+Template.message.events({
+	'mousedown #selectable'() {
+		document.getSelection().empty();
+		MessageAction.setSelection();
+	},
+	'mouseup #selectable'() {
+		const selected = document.getSelection().toString();
+		if (selected.length) {
+			MessageAction.setSelection(selected);
+		}
+	},
+});
+
 Template.message.helpers({
 	unread() {
 		const { msg, subscription } = this;

app/ui-message/client/messageBox/messageBoxReplyPreview.js

@@ -2,10 +2,18 @@ import { Template } from 'meteor/templating';
 import './messageBoxReplyPreview.html';
 
 
+const getMessageTextPreview = ({ msg, start, end }) => {
+	if (start || end) {
+		return `[...] ${ msg.slice(start, end) } [...]`;
+	}
+	return msg;
+};
+
 Template.messageBoxReplyPreview.helpers({
 	attachments() {
 		const { replyMessageData } = this;
-		return [{ text: replyMessageData.msg, author_name: replyMessageData.u.username }];
+		const message = getMessageTextPreview(replyMessageData);
+		return [{ text: message, author_name: replyMessageData.u.username }];
 	},
 });
 

app/ui-utils/client/lib/MessageAction.js

@@ -49,6 +49,15 @@ export const MessageAction = new class {
 
 	constructor() {
 		this.buttons = new ReactiveVar({});
+		this.selection = '';
+	}
+
+	setSelection(selection = '') {
+		this.selection = selection;
+	}
+
+	getSelection() {
+		return this.selection;
 	}
 
 	addButton(config) {
@@ -150,7 +159,13 @@ export const MessageAction = new class {
 Meteor.startup(async function() {
 	const { chatMessages } = await import('../../../ui');
 
+	const flushStartEnd = (msg) => {
+		delete msg.start;
+		delete msg.end;
+	};
+
 	const getChatMessagesFrom = (msg) => {
+		flushStartEnd(msg);
 		const { rid = Session.get('openedRoom'), tmid = msg._id } = msg;
 
 		return chatMessages[`${ rid }-${ tmid }`] || chatMessages[rid];
@@ -190,6 +205,43 @@ Meteor.startup(async function() {
 		group: 'menu',
 	});
 
+	MessageAction.addButton({
+		id: 'quote-message-fragment',
+		icon: 'quote',
+		label: 'Quote_fragment',
+		context: ['message', 'message-mobile', 'threads'],
+		action() {
+			const { msg: message } = messageArgs(this);
+			const { input } = getChatMessagesFrom(message);
+			const $input = $(input);
+			const substring = MessageAction.getSelection();
+
+			message.start = message.msg.indexOf(substring);
+			message.end = message.start + substring.length;
+
+			let messages = $input.data('reply') || [];
+			messages = addMessageToList(messages, message);
+
+			$input
+				.focus()
+				.data('mention-user', false)
+				.data('reply', messages)
+				.trigger('dataChange');
+
+			MessageAction.setSelection();
+		},
+		condition({ msg: message, subscription }) {
+			const substring = MessageAction.getSelection();
+			if (subscription == null || !substring || message.msg.indexOf(substring) === -1) {
+				return false;
+			}
+
+			return true;
+		},
+		order: -4,
+		group: ['message', 'menu'],
+	});
+
 	MessageAction.addButton({
 		id: 'quote-message',
 		icon: 'quote',
@@ -202,7 +254,7 @@ Meteor.startup(async function() {
 
 			let messages = $input.data('reply') || [];
 
-			messages = addMessageToList(messages, message, input);
+			messages = addMessageToList(messages, message);
 
 			$input
 				.focus()

app/ui-utils/client/lib/prependReplies.js

@@ -3,14 +3,27 @@ import { Meteor } from 'meteor/meteor';
 import { MessageAction } from './MessageAction';
 import { Rooms, Users } from '../../../models/client';
 
+const getStartEnd = (start, end) => {
+	let parameters = '';
+	if (start !== undefined) {
+		parameters += `&start=${ start }`;
+	}
+	if (end !== undefined) {
+		parameters += `&end=${ end }`;
+	}
+	return parameters;
+};
+
 export const prependReplies = async (msg, replies = [], mention = false) => {
 	const { username } = Users.findOne({ _id: Meteor.userId() }, { fields: { username: 1 } });
 
-	const chunks = await Promise.all(replies.map(async ({ _id, rid, u }) => {
+	const chunks = await Promise.all(replies.map(async ({ _id, rid, u, start, end }) => {
 		const permalink = await MessageAction.getPermaLink(_id);
 		const room = Rooms.findOne(rid, { fields: { t: 1 } });
 
-		let chunk = `[ ](${ permalink })`;
+		const query_params = getStartEnd(start, end);
+
+		let chunk = `[ ](${ permalink }${ query_params })`;
 		if (room.t === 'd' && u.username !== username && mention) {
 			chunk += ` @${ u.username }`;
 		}

client/components/Message/Attachments/QuoteAttachment.tsx

@@ -6,6 +6,7 @@ import colors from '@rocket.chat/fuselage-tokens/colors';
 import { Attachment, AttachmentPropsBase } from './Attachment';
 import { useTimeAgo } from '../../../hooks/useTimeAgo';
 import MarkdownText from '../../MarkdownText';
+import { findSlice } from '../helpers/getUrlParamsQuote';
 
 import Attachments from '.';
 
@@ -31,6 +32,10 @@ const hover = css`
 
 export const QuoteAttachment: FC<QuoteAttachmentProps> = ({ author_icon: url, author_name: name, author_link: authorLink, message_link: messageLink, ts, text, attachments }) => {
 	const format = useTimeAgo();
+	const slice = findSlice(messageLink, text);
+	if (slice) {
+		text = `[...] ${ slice } [...]`;
+	}
 	return <>
 		<Attachment.Content className={hover} width='full'>
 			<Attachment.Details is='blockquote' borderRadius='x2' borderWidth='x2' borderStyle='solid' borderColor='neutral-200' borderInlineStartColor='neutral-600'>

client/components/Message/helpers/getUrlParamsQuote.ts

@@ -0,0 +1,15 @@
+export function findSlice(messageUrl: string|undefined, string: string): string {
+	if (messageUrl !== undefined) {
+		const url = new URL(messageUrl);
+		const params = new URLSearchParams(url.search);
+
+		const start = params.get('start');
+		const end = params.get('end');
+
+		return string.slice(
+			start !== null ? +start : undefined,
+			end !== null ? +end : undefined,
+		);
+	}
+	return '';
+}

packages/rocketchat-i18n/i18n/en.i18n.json

@@ -3201,6 +3201,7 @@
   "Queue_Time": "Queue Time",
   "quote": "quote",
   "Quote": "Quote",
+  "Quote_fragment": "Quote Fragment",
   "Random": "Random",
   "RD Station": "RD Station",
   "RDStation_Token": "RD Station Token",

packages/rocketchat-i18n/i18n/pt-BR.i18n.json

@@ -2685,6 +2685,7 @@
   "Queue_Time": "Tempo na fila",
   "quote": "citação",
   "Quote": "Citar",
+  "Quote_fragment": "Citar Fragmento",
   "Random": "Aleatória",
   "RD Station": "RD Station",
   "RDStation_Token": "RD Station Token",