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	diff --git a/changelogs/84.add b/changelogs/84.add
	new file mode 100644
	index 0000000..bd6ff3a
	--- /dev/null
	+++ b/changelogs/84.add
	@@ -0,0 +1 @@
	+Display edited version of events
	diff --git a/src/contents/ui/Bubble.qml b/src/contents/ui/Bubble.qml
	index 9258994..f9dd1d9 100644
	--- a/src/contents/ui/Bubble.qml
	+++ b/src/contents/ui/Bubble.qml
	@@ -1,209 +1,216 @@
	/*
	* This file is part of kazv.
	* SPDX-FileCopyrightText: 2020-2023 tusooa <tusooa@kazv.moe>
	* SPDX-License-Identifier: AGPL-3.0-or-later
	*/

	import QtQuick 2.15
	import QtQuick.Layouts 1.15
	import QtQuick.Controls 2.15

	import org.kde.kirigami 2.13 as Kirigami

	import '.' as Kazv

	ItemDelegate {
	id: upper
	default property var children
	property var currentEvent: event
	property var menuContent: []

	readonly property var bubbleSpacing: leftPadding + rightPadding
	Layout.fillWidth: true
	Layout.preferredHeight: bubbleRootLayout.implicitHeight

	property var backgroundItem: Rectangle {
	anchors.fill: parent
	color: hovered ? Kirigami.Theme.activeBackgroundColor : Kirigami.Theme.backgroundColor
	}
	background: compactMode ? null : backgroundItem

	property var eventSourcePopup: Kirigami.OverlaySheet {
	title: l10n.get('event-source-popup-title')

	Kazv.EventSourceView {
	event: upper.currentEvent
	}
	}

	property var reactionPopup: Kazv.ReactToEventPopup {
	onAccepted: eventView.reactWith(text)
	}

	property var menu: Menu {
	objectName: 'bubbleContextMenu'
	property list<QtObject> staticItems: [
	Kirigami.Action {
	objectName: 'replyToMenuItem'
	text: l10n.get('event-reply-action')
	onTriggered: setDraftReplyTo(currentEvent.eventId)
	enabled: event && !event.redacted
	},
	Kirigami.Action {
	objectName: 'deleteMenuItem'
	text: l10n.get('event-delete')
	onTriggered: eventView.redactSelf()
	enabled: event && !event.redacted
	},
	Kirigami.Action {
	objectName: 'reactMenuItem'
	text: l10n.get('event-react-action')
	onTriggered: reactionPopup.open()
	enabled: event && !event.redacted
	},
	MenuSeparator {},
	Kirigami.Action {
	text: l10n.get('event-view-source')
	onTriggered: eventSourcePopup.open()
	}
	]

	contentData: Array.from(staticItems).concat(upper.menuContent)
	}

	function shouldPopupMenu() {
	return !compactMode
	}

	function maybePopupMenu() {
	if (shouldPopupMenu()) {
	menu.popup(parent)
	}
	}

	RowLayout {
	id: bubbleRootLayout
	anchors.left: parent.left
	anchors.right: parent.right
	property var replyToOrAnnotatedEventId: currentEvent.replyingToEventId \|\| (currentEvent.relationType === 'm.annotation' ? currentEvent.relatedEventId : '')

	ColumnLayout {
	Layout.fillWidth: true

	property var inReplyTo: Item {
	Layout.fillWidth: true
	Layout.margins: 0
	Layout.minimumHeight: Math.min(inReplyToLayout.implicitHeight, Kirigami.Units.gridUnit * 5)
	Layout.maximumHeight: Kirigami.Units.gridUnit * 5
	clip: true

	RowLayout {
	id: inReplyToLayout
	anchors {
	top: parent.top
	left: parent.left
	right: parent.right
	}
	Rectangle {
	Layout.fillHeight: true
	Layout.preferredWidth: Kirigami.Units.smallSpacing
	color: Kirigami.Theme.activeTextColor
	clip: true
	}

	Loader {
	id: inReplyToLoader
	clip: true
	source: 'qrc:/EventViewCompact.qml'
	active: bubbleRootLayout.replyToOrAnnotatedEventId && !compactMode
	asynchronous: true
	Layout.minimumHeight: inReplyToLoader.item ? inReplyToLoader.item.height : 0
	Layout.fillWidth: true

	property var event: room.messageById(bubbleRootLayout.replyToOrAnnotatedEventId)
	property var props: ({
	event,
	sender: room.member(event.sender \|\| matrixSdk.userId),
	stateKeyUser: event.stateKey ? room.member(event.stateKey) : {},
	isGapped: timeline.gaps.includes(event.eventId),
	})
	}
	}
	}
	children: [
	...(bubbleRootLayout.replyToOrAnnotatedEventId && !compactMode ? [inReplyTo] : []),
	...(Array.isArray(upper.children) ? upper.children :
	upper.children ? [upper.children] : []),
	]
	}

	property var popupAction: Kirigami.Action {
	id: popupAction
	text: l10n.get('event-popup-action')
	iconName: 'view-more-horizontal-symbolic'
	onTriggered: maybePopupMenu()
	}

	RowLayout {
	Layout.alignment: Qt.AlignBottom
	Kirigami.Icon {
	source: 'emblem-encrypted-locked'
	visible: !compactMode && event && event.encrypted
	Layout.preferredHeight: inlineBadgeSize
	Layout.preferredWidth: inlineBadgeSize
	Accessible.role: Accessible.StaticText
	Accessible.name: l10n.get('event-encrypted')
	ToolTip.text: l10n.get('event-encrypted')
	ToolTip.delay: 1000
	ToolTip.timeout: 5000
	ToolTip.visible: hoverHandlerEncIcon.hovered

	HoverHandler { id: hoverHandlerEncIcon }
	}

	Kirigami.Icon {
	objectName: 'localEchoIndicator'
	visible: !!event.isLocalEcho
	source: event.isSending ? 'state-sync' : 'state-warning'
	Layout.preferredHeight: Kirigami.Units.iconSizes.medium
	Layout.preferredWidth: Kirigami.Units.iconSizes.medium
	Accessible.role: event.isSending ? Accessible.StaticText : Accessible.Button
	Accessible.name: event.isSending ? l10n.get('event-sending') : l10n.get('event-resend')
	ToolTip.text: event.isSending ? l10n.get('event-sending') : l10n.get('event-send-failed')
	ToolTip.delay: 1000
	ToolTip.timeout: 5000
	ToolTip.visible: hoverHandler.hovered

	HoverHandler { id: hoverHandler }
	TapHandler {
	objectName: 'resendEventButton'
	onTapped: {
	room.resendMessage(event.txnId);
	}
	enabled: event.isFailed
	}
	}

	Label {
	objectName: 'timeIndicator'
	visible: !compactMode && !event.isLocalEcho
	text: event.formattedTime
	font.pointSize: Kirigami.Theme.defaultFont.pointSize * 0.8
	}

	+ Label {
	+ objectName: 'editedIndicator'
	+ visible: !compactMode && event.isEdited
	+ text: l10n.get('event-edited-indicator')
	+ font.pointSize: Kirigami.Theme.defaultFont.pointSize * 0.8
	+ }
	+
	Kazv.EventReadIndicator {
	objectName: 'eventReadIndicator'
	shouldShow: !compactMode && !event.isLocalEcho
	model: event.readers()
	}

	ToolButton {
	id: moreButton
	objectName: 'moreButton'
	visible: !compactMode
	action: popupAction
	display: AbstractButton.IconOnly
	}
	}
	}
	}
	diff --git a/src/contents/ui/EventView.qml b/src/contents/ui/EventView.qml
	index c06f1d0..f45df25 100644
	--- a/src/contents/ui/EventView.qml
	+++ b/src/contents/ui/EventView.qml
	@@ -1,274 +1,278 @@
	/*
	* This file is part of kazv.
	* SPDX-FileCopyrightText: 2020-2023 tusooa <tusooa@kazv.moe>
	* SPDX-License-Identifier: AGPL-3.0-or-later
	*/

	import QtQuick 2.2
	import QtQuick.Layouts 1.15
	import QtQuick.Controls 2.15

	import Qt.labs.qmlmodels 1.0

	import org.kde.kirigami 2.13 as Kirigami

	import 'event-types' as Types

	Item {
	id: eventView
	property var event
	property var sender
	property var stateKeyUser

	property var messageType: getMessageType(event)

	property var iconSize: Kirigami.Units.iconSizes.large
	property var inlineBadgeSize: Kirigami.Units.iconSizes.smallMedium
	property var senderNameSize: Kirigami.Units.gridUnit * 1.2
	property var redactPromise: null

	property var minHeight: Kirigami.Units.gridUnit * 2
	property var isGapped: false
	property var compactMode: false

	property var calculatedHeight: (gappedLabel.visible ? gappedLabel.height : 0) + (loader.item ? loader.item.implicitHeight : 0)

	height: calculatedHeight
	implicitHeight: calculatedHeight
	Layout.minimumHeight: calculatedHeight
	Layout.preferredHeight: calculatedHeight

	Component {
	id: textEV
	Types.Text {
	event: eventView.event
	sender: eventView.sender
	}
	}

	Component {
	id: emoteEV
	Types.Emote {
	event: eventView.event
	sender: eventView.sender
	}
	}

	Component {
	id: noticeEV
	Types.Notice {
	event: eventView.event
	sender: eventView.sender
	}
	}

	Component {
	id: stateEV
	Types.State {
	event: eventView.event
	sender: eventView.sender
	stateKeyUser: eventView.stateKeyUser
	}
	}

	Component {
	id: imageEV
	Types.Image {
	event: eventView.event
	sender: eventView.sender
	}
	}

	Component {
	id: fileEV
	Types.File {
	event: eventView.event
	sender: eventView.sender
	}
	}

	Component {
	id: videoEV
	Types.Video {
	event: eventView.event
	sender: eventView.sender
	}
	}

	Component {
	id: audioEV
	Types.Audio {
	event: eventView.event
	sender: eventView.sender
	}
	}

	Component {
	id: unknownEV
	Types.Fallback {
	event: eventView.event
	sender: eventView.sender
	}
	}

	Component {
	id: redactedEV
	Types.Redacted {
	event: eventView.event
	sender: eventView.sender
	}
	}

	Component {
	id: reactionEV
	Types.Reaction {
	event: eventView.event
	sender: eventView.sender
	}
	}

	Component {
	id: ignoreEV
	Item {
	}
	}

	ToolButton {
	id: gappedLabel
	visible: eventView.isGapped && !eventView.compactMode
	icon.name: 'content-loading-symbolic'
	text: l10n.get('room-timeline-load-more-action')
	anchors.top: eventView.top
	anchors.bottom: loader.top
	anchors.left: eventView.left
	anchors.right: eventView.right
	onClicked: eventView.paginateBack()
	}

	Loader {
	sourceComponent: getSource(messageType)
	id: loader
	anchors.left: eventView.left
	anchors.right: eventView.right
	anchors.bottom: eventView.bottom
	}

	function getSource(t) {
	switch (t) {
	case 'text':
	return textEV;

	case 'emote':
	return emoteEV;

	case 'notice':
	return noticeEV;

	case 'state':
	return stateEV;

	case 'image':
	return imageEV;

	case 'file':
	return fileEV;

	case 'video':
	return videoEV;

	case 'audio':
	return audioEV;

	case 'redacted':
	return redactedEV;

	case 'reaction':
	return reactionEV;

	case 'ignore':
	return ignoreEV;

	default:
	return unknownEV;
	}
	}

	function getMessageType(e) {
	if (e.redacted) {
	return 'redacted';
	}
	if (e.isState) {
	return 'state';
	}
	+ // ignore edits of other events
	+ if (e.relationType === 'm.replace') {
	+ return 'ignore';
	+ }
	switch (e.type) {
	case 'm.room.message':
	switch (e.content.msgtype) {
	case 'm.text':
	return 'text';

	case 'm.emote':
	return 'emote';

	case 'm.notice':
	return 'notice';

	case 'm.image':
	return 'image';

	case 'm.file':
	return 'file';

	case 'm.audio':
	return 'audio';

	case 'm.video':
	return 'video';

	case 'm.location':
	return 'location';

	default:
	return 'unknown';
	}

	case 'm.sticker':
	return 'image';

	case 'm.room.redaction':
	return 'ignore';

	case 'm.reaction':
	return 'reaction';

	default:
	return 'unknown';
	}
	}

	function redactSelf(reason) {
	if (eventView.event.eventId) {
	eventView.redactPromise = room.redactEvent(eventView.event.eventId, reason);
	} else {
	// this is a local echo
	eventView.redactPromise = room.removeLocalEcho(eventView.event.txnId);
	}
	}

	Connections {
	target: eventView.redactPromise
	function onResolved(success, data) {
	if (!success) {
	showPassiveNotification(l10n.get('event-delete-failed', { errorMsg: data.error, errorCode: data.errorCode }));
	}
	eventView.redactPromise = null;
	}
	}

	function paginateBack() {
	room.paginateBackFrom(event.eventId);
	}

	function reactWith(reactionText) {
	room.sendReaction(reactionText, event.eventId);
	}
	}
	diff --git a/src/l10n/cmn-Hans/100-ui.ftl b/src/l10n/cmn-Hans/100-ui.ftl
	index ada9dfe..a0fa7bb 100644
	--- a/src/l10n/cmn-Hans/100-ui.ftl
	+++ b/src/l10n/cmn-Hans/100-ui.ftl
	@@ -1,275 +1,276 @@
	### This file is part of kazv.
	### SPDX-FileCopyrightText: 2020-2023 tusooa <tusooa@kazv.moe>
	### SPDX-License-Identifier: AGPL-3.0-or-later

	app-title = { -kt-app-name }

	user-name-with-id = { $name } （{ $userId }）

	global-drawer-title = { -kt-app-name }
	global-drawer-action-switch-account = 切换账号
	global-drawer-action-hard-logout = 登出
	global-drawer-action-save-session = 保存当前会话
	global-drawer-action-configure-shortcuts = 配置快捷键
	global-drawer-action-settings = 设置
	global-drawer-action-create-room = 创建房间
	global-drawer-action-join-room = 加入房间

	action-settings-page-title = 配置快捷键
	action-settings-shortcut-prompt = 快捷键：{ $shortcut }
	action-settings-shortcut-none = （无）
	action-settings-shortcut-edit-action = 编辑
	action-settings-shortcut-remove-action = 清除
	action-settings-shortcut-conflict-modal-title = 冲突的快捷键
	action-settings-shortcut-conflict = 快捷键 { $shortcut } 跟别的指令有冲突。<br>若要继续，别的指令的快捷键会被清除。<br><br>冲突的指令有：<br>{ $conflictingAction }
	action-settings-shortcut-conflict-continue = 继续
	action-settings-shortcut-conflict-cancel = 取消

	empty-room-page-title = 没有选中房间
	empty-room-page-description = 当前没有选中的房间。

	login-page-title = 登录
	login-page-userid-prompt = 用户 id：
	login-page-userid-input-placeholder = 例如： @foo:example.org
	login-page-password-prompt = 密码：
	login-page-login-button = 登录
	login-page-close-button = 关闭
	login-page-existing-sessions-prompt = 从已有会话中选一个：
	login-page-alternative-password-login-prompt = 或者用用户 id 和密码启动新会话：
	login-page-restore-session-button = 恢复会话
	login-page-request-failed-prompt = 登录失败。错误代码：{ $errorCode }。错误讯息：{ $errorMsg }。
	login-page-discover-failed-prompt = 不能检测此用户所在的服务器，或者服务器不可用。错误代码：{ $errorCode }。错误讯息：{ $errorMsg }。

	main-page-title = { -kt-app-name } - { $userId }
	main-page-recent-tab-title = 最近
	main-page-favourites-tab-title = 最爱
	main-page-people-tab-title = 人们
	main-page-rooms-tab-title = 房间

	room-list-view-room-item-title-name = { $name }
	room-list-view-room-item-title-heroes = { $hero } { $otherNum ->
	[0] { "" }
	[1] 和 { $secondHero }
	*[other] 和别的 { $otherNum } 个人
	}
	room-list-view-room-item-title-id = 未命名房间（{ $roomId }）
	room-list-view-room-item-fav-action = 设为最爱
	room-tags-fav-action-notification = 把 { $name } 设为了最爱
	room-tags-fav-action-notification-failed = 不能把 { $name } 设为最爱。错误代码：{ $errorCode }。错误讯息：{ $errorMsg }。
	room-tags-unfav-action-notification = 把 { $name } 从最爱中移除了
	room-tags-unfav-action-notification-failed = 不能把 { $name } 从最爱中移除。错误代码：{ $errorCode }。错误讯息：{ $errorMsg }。
	room-tags-add-tag-action-notification = 把标签 { $tag } 添加到了 { $name }
	room-tags-add-tag-action-notification-failed = 不能把标签 { $tag } 添加到 { $name }。错误代码：{ $errorCode }。错误讯息：{ $errorMsg }。
	room-tags-remove-tag-action-notification = 把标签 { $tag } 从 { $name } 移除了
	room-tags-remove-tag-action-notification-failed = 不能把标签 { $tag } 从 { $name } 移除。错误代码：{ $errorCode }。错误讯息：{ $errorMsg }。
	room-list-view-room-item-more-action = 更多...
	room-list-view-room-item-invited = （邀请）
	room-list-view-room-item-left = （已离开）

	room-settings-action = 房间设置...
	room-settings-page-title = { $room } 的房间设置
	room-settings-tags = 房间标签
	room-settings-favourited = 设为最爱
	room-settings-remove-tag = 移除标签
	room-settings-add-tag = 添加标签
	room-settings-members-action = 房间成员...
	room-settings-banned-members-action = 被封禁的成员...

	room-member-list-page-title = { $room } 的成员

	room-leave-action = 离开房间
	room-leave-confirm-popup-title = 离开房间
	room-leave-confirm-popup-message = 你确定要离开这个房间吗？
	room-leave-confirm-popup-confirm-action = 离开
	room-leave-confirm-popup-cancel-action = 留下

	send-message-box-input-placeholder = 在此输入您的讯息...
	send-message-box-send = 发送
	send-message-box-send-file = 发送文件
	send-message-box-reply-to = 回复给
	send-message-box-remove-reply-to-action = 移除回复关系
	send-message-box-stickers = 发送贴纸...
	send-message-box-stickers-popup-title = 发送贴纸

	sticker-picker-user-stickers = 我的贴纸

	room-timeline-load-more-action = 加载更多

	room-invite-accept-action = 接受邀请
	room-invite-reject-action = 拒绝邀请
	room-invite-popup-title = 被邀请了
	room-invite-popup-text = 你被邀请到这个房间了。
	room-invite-popup-text-with-inviter = 你被 { $inviterName } 邀请到这个房间了。

	## 状态事件
	## 通用参数：
	## gender = 发送者的性别（male/female/neutral）
	## stateKeyUser = state key 用户的名字
	## stateKeyUserGender = state key 用户的性别
	member-state-joined-room = 加入了房间。
	member-state-changed-name-and-avatar = 修改了名字和头像。
	member-state-changed-name = 修改了名字。
	member-state-changed-avatar = 修改了头像。
	member-state-invited = 把 { $stateKeyUser } 邀请到了本房间。
	member-state-left = 离开了房间。
	member-state-kicked = 踢出了 { $stateKeyUser }。
	member-state-banned = 封禁了 { $stateKeyUser }。
	member-state-unbanned = 解封了 { $stateKeyUser }。

	state-room-created = 创建了房间。
	state-room-name-changed = 把房间名字改成了 { $newName }。
	state-room-topic-changed = 把房间话题改成了 { $newTopic }。
	state-room-avatar-changed = 修改了房间头像。
	state-room-pinned-events-changed = 修改了房间的置顶讯息。
	state-room-alias-changed = 修改了房间的别名。
	state-room-join-rules-changed = 修改了房间的加入规则。
	state-room-power-levels-changed = 修改了房间的权限。
	state-room-encryption-activated = 对本房间启用了加密。

	event-message-image-sent = 发送了图片「{ $body }」。
	event-message-file-sent = 发送了文件「{ $body }」。
	event-message-video-sent = 发送了视频「{ $body }」。
	event-message-audio-sent = 发送了音频「{ $body }」。
	event-message-audio-play-audio = 播放音频
	event-sending = 发送中...
	event-send-failed = 发送失败
	event-resend = 重试发送这个事件
	event-deleted = （已删除）
	event-delete = 删除
	event-delete-failed = 删除事件出错。错误码：{ $errorCode }。错误讯息：{ $errorMsg }。
	event-view-source = 查看源码...
	event-source-popup-title = 事件源码
	event-source-decrypted = 解密的事件源码
	event-source-original = 原始的事件源码
	event-reply-action = 回复
	event-popup-action = 更多关于这个事件...
	event-reacted-with = 回应了「{ $key }」
	event-react-action = 回应...
	event-react-popup-title = 回应一条消息
	event-react-accept-action = 回应
	event-react-cancel-action = 取消
	event-react-with-prompt = 回应以：
	event-encrypted = 这条消息已加密
	event-msgtype-fallback-text = 未知的消息类型：{ $msgtype }
	event-fallback-text = 未知事件：{ $type }
	event-cannot-decrypt-text = （加密内容）
	event-read-indicator-more = +{ $rest }
	event-read-indicator-list-title = { $numUsers } 个用户已读
	+event-edited-indicator = （编辑过了）

	media-file-menu-option-view = 查看
	media-file-menu-option-save-as = 保存为
	media-file-menu-add-sticker-action = 添加到贴纸...

	add-sticker-popup-title = 添加到贴纸
	add-sticker-popup-short-code-prompt = 短代码：
	add-sticker-popup-short-code-exists-warning = 贴纸包里已经有这个短代码了。上面的贴纸会覆盖已有的。
	add-sticker-popup-add-sticker-button = 添加
	add-sticker-popup-cancel-button = 取消
	add-sticker-popup-failed-prompt = 无法添加贴纸。错误代码：{ $errorCode }。错误讯息：{ $errorMsg }。

	kazv-io-download-success-prompt = 下载成功
	kazv-io-download-failure-prompt = 下载失败：{ $detail }
	kazv-io-failure-detail-user-cancel = 用户已取消
	kazv-io-failure-detail-network-error = 网络错误
	kazv-io-failure-detail-open-file-error = 打开文件错误
	kazv-io-failure-detail-write-file-error = 写入文件错误
	kazv-io-failure-detail-hash-error = 哈息值校验失败
	kazv-io-failure-detail-kazv-error = 未知错误，请将此报告为漏洞
	kazv-io-upload-failure-prompt = 上传失败：{ $detail }
	kazv-io-downloading-prompt = 正在下载：{ $fileName }
	kazv-io-uploading-prompt = 正在上传：{ $fileName }
	kazv-io-prompt-close = 好的
	kazv-io-pause = 暂停
	kazv-io-resume = 继续
	kazv-io-cancel = 取消

	create-room-page-title = 创建房间
	create-room-page-visibility-prompt = 房间可见性：
	create-room-page-visibility-public = 公开
	create-room-page-visibility-private = 私有
	create-room-page-name-prompt = 房间名称（可选）：
	create-room-page-name-placeholder = 无名
	create-room-page-alias-prompt = 房间别名（可选）：
	create-room-page-alias-placeholder = #foo:example.org
	create-room-page-topic-prompt = 房间主题（可选）：
	create-room-page-topic-placeholder = 无题
	create-room-page-allow-federate-prompt = 允许别的服务器上的用户加入
	create-room-page-action-create-room = 创建房间
	create-room-page-success-prompt = 房间已创建。
	create-room-page-failed-prompt = 无法创建房间。错误代码：{ $errorCode }。错误讯息：{ $errorMsg }。

	join-room-page-title = 加入房间
	join-room-page-id-or-alias-prompt = 房间 id 或别名：
	join-room-page-id-or-alias-placeholder = #foo:example.org 或 !abcdef:example.org
	join-room-page-servers-prompt = 经由服务器（可选，用换行分割）：
	join-room-page-servers-placeholder =
	example.org
	example.com
	join-room-page-action-join-room = 加入房间
	join-room-page-success-prompt = 成功加入房间 { $room }。
	join-room-page-failed-prompt = 无法加入房间 { $room }。错误代码：{ $errorCode }。错误讯息：{ $errorMsg }。

	leave-room-success-prompt = 成功离开房间 { $room }。
	leave-room-failed-prompt = 无法离开房间 { $room }。错误代码：{ $errorCode }。错误讯息：{ $errorMsg }。

	device-trust-level-unseen = 未曾见过
	device-trust-level-seen = 见过
	device-trust-level-verified = 已验证
	device-trust-level-blocked = 已屏蔽
	device-set-trust-level = 设置信任等级...
	device-set-trust-level-dialog-title = 设置信任等级
	device-set-trust-level-dialog-name-label = 设备名：{ $name }
	device-set-trust-level-dialog-id-label = 设备id：{ $id }
	device-set-trust-level-dialog-ed25519-key-label = Ed25519公钥：{ $key }
	device-set-trust-level-dialog-curve25519-key-label = Curve25519公钥：{ $key }
	device-set-trust-level-dialog-save = 保存
	device-set-trust-level-dialog-cancel = 取消

	settings-page-title = 设置
	settings-save = 保存设置
	settings-profile-load-failed-prompt = 无法加载用户资料。错误码：{ $errorCode }。错误讯息：{ $errorMsg }。
	settings-profile-change-avatar = 改变头像...
	settings-profile-display-name = 显示名：
	settings-profile-save-failed-prompt = 无法保存用户资料。错误码：{ $errorCode }。错误讯息：{ $errorMsg }。
	settings-cache-directory = 缓存目录：

	typing-indicator = { $typingUser } { $otherNum ->
	[0] 正在输入...
	[1] 和 { $secondTypingUser } 正在输入...
	*[other] 和另外 { $otherNum } 人正在输入...
	}

	notification-message = <b>{ $user }：</b> { $message }
	notification-message-no-content = <b>{ $user }</b> 给你发了一条讯息。

	user-page-power-level = 权限等级：{ $powerLevel }
	user-page-edit-power-level-action = 编辑
	user-page-save-power-level-action = 保存
	user-page-discard-power-level-action = 丢弃
	user-page-set-power-level-failed-prompt = 无法设置权限等级。错误码：{ $errorCode }。错误讯息：{ $errorMsg }。
	user-page-kick-user-action = 踢出
	user-page-kick-user-confirm-dialog-title = 踢出用户
	user-page-kick-user-confirm-dialog-content = 确定要把 { $name }（{ $userId }）踢出 { $roomName } 吗？
	user-page-kick-user-reason-prompt = 原因（可选）：
	user-page-kick-user-failed-prompt = 无法踢出用户。错误码：{ $errorCode }。错误讯息：{ $errorMsg }。

	user-page-ban-user-action = 封禁
	user-page-ban-user-confirm-dialog-titile = 封禁用户
	user-page-ban-user-confirm-dialog-content = 确定要在 { $roomName } 中封禁 { $name }（{ $userId }）吗？
	user-page-ban-user-reason-prompt = 原因（可选）：
	user-page-ban-user-failed-prompt = 无法封禁用户。错误码：{ $error }。错误讯息：{ $errorMsg }。
	user-page-unban-user-action = 解禁
	user-page-unban-user-failed-prompt = 无法解禁用户。错误码：{ $error }。错误讯息：{ $errorMsg }。

	room-invite-page-title = 邀请用户到 { $room }
	room-invite-page-invite-failed-prompt = 无法邀请用户。错误码：{ $errorCode }。错误讯息：{ $errorMsg }。
	room-invite-invitee-matrix-id-placeholder = 用户的 Matrix id，比如 @foo:example.org
	room-invite-invitee-matrix-id-prompt = 要邀请的用户：
	room-invite-page-invite-button = 邀请
	room-invite-action = 邀请到房间...

	confirm-upload-popup-title = 确认上传
	confirm-upload-popup-prompt = 即将上传「{ $file }」（{ $current } / { $total }）。
	confirm-upload-popup-prompt-single-file = 即将上传「{ $file }」。
	confirm-upload-popup-accept-button = 上传
	confirm-upload-popup-cancel-button = 取消
	diff --git a/src/l10n/en/100-ui.ftl b/src/l10n/en/100-ui.ftl
	index a2f838d..ea83fbb 100644
	--- a/src/l10n/en/100-ui.ftl
	+++ b/src/l10n/en/100-ui.ftl
	@@ -1,296 +1,297 @@
	### This file is part of kazv.
	### SPDX-FileCopyrightText: 2020-2023 tusooa <tusooa@kazv.moe>
	### SPDX-License-Identifier: AGPL-3.0-or-later

	app-title = { -kt-app-name }

	user-name-with-id = { $name } ({ $userId })

	global-drawer-title = { -kt-app-name }
	global-drawer-action-switch-account = Switch account
	global-drawer-action-hard-logout = Logout
	global-drawer-action-save-session = Save current session
	global-drawer-action-configure-shortcuts = Configure shortcuts
	global-drawer-action-settings = Settings
	global-drawer-action-create-room = Create room
	global-drawer-action-join-room = Join room

	action-settings-page-title = Configure shortcuts
	action-settings-shortcut-prompt = Shortcut: { $shortcut }
	action-settings-shortcut-none = (none)
	action-settings-shortcut-edit-action = Edit
	action-settings-shortcut-remove-action = Clear
	action-settings-shortcut-conflict-modal-title = Conflicting shortcuts
	action-settings-shortcut-conflict = The shortcut { $shortcut } has conflicts with other actions. <br>If you continue, the shortcuts for other actions will be cleared. <br><br>Conflicting actions: <br>{ $conflictingAction }
	action-settings-shortcut-conflict-continue = Continue
	action-settings-shortcut-conflict-cancel = Cancel

	empty-room-page-title = No rooms selected
	empty-room-page-description = There is no room selected now.

	login-page-title = Log in
	login-page-userid-prompt = User id:
	login-page-userid-input-placeholder = E.g.: @foo:example.org
	login-page-password-prompt = Password:
	login-page-login-button = Log in
	login-page-close-button = Close
	login-page-existing-sessions-prompt = Choose from one of the existing sessions:
	login-page-alternative-password-login-prompt = Or start a new session with user id and password:
	login-page-restore-session-button = Restore session
	login-page-request-failed-prompt = Login failed. Error code: { $errorCode }. Error message: { $errorMsg }.
	login-page-discover-failed-prompt = Unable to detect the server this user is on, or the server is unavailable. Error code: { $errorCode }. Error message: { $errorMsg }.

	main-page-title = { -kt-app-name } - { $userId }
	main-page-recent-tab-title = Recent
	main-page-favourites-tab-title = Favourites
	main-page-people-tab-title = People
	main-page-rooms-tab-title = Rooms

	room-list-view-room-item-title-name = { $name }
	room-list-view-room-item-title-heroes = { $hero } { $otherNum ->
	[0] { "" }
	[1] and { $secondHero }
	*[other] and { $otherNum } others
	}
	room-list-view-room-item-title-id = Unnamed room ({ $roomId })
	room-list-view-room-item-fav-action = Set as favourite
	room-tags-fav-action-notification = Set { $name } as favourite
	room-tags-fav-action-notification-failed = Cannot set { $name } as favourite. Error code: { $errorCode }. Error message: { $errorMsg }.
	room-tags-unfav-action-notification = Removed { $name } from favourites
	room-tags-unfav-action-notification-failed = Cannot remove { $name } from favourites. Error code: { $errorCode }. Error message: { $errorMsg }.
	room-tags-add-tag-action-notification = Added tag { $tag } to { $name }
	room-tags-add-tag-action-notification-failed = Cannot add tag { $tag } to { $name }. Error code: { $errorCode }. Error message: { $errorMsg }.
	room-tags-remove-tag-action-notification = Removed tag { $tag } from { $name }
	room-tags-remove-tag-action-notification-failed = Cannot remove tag { $tag } from { $name }. Error code: { $errorCode }. Error message: { $errorMsg }.
	room-list-view-room-item-more-action = More...
	room-list-view-room-item-invited = (Invited)
	room-list-view-room-item-left = (Left)

	room-settings-action = Room settings...
	room-settings-page-title = Room settings for { $room }
	room-settings-tags = Room tags
	room-settings-favourited = Set as favourite
	room-settings-remove-tag = Remove tag
	room-settings-add-tag = Add tag
	room-settings-members-action = Room members...
	room-settings-banned-members-action = Banned members...

	room-member-list-page-title = Members of { $room }

	room-leave-action = Leave room
	room-leave-confirm-popup-title = Leaving room
	room-leave-confirm-popup-message = Are you sure you want to leave this room?
	room-leave-confirm-popup-confirm-action = Leave
	room-leave-confirm-popup-cancel-action = Stay

	send-message-box-input-placeholder = Type your message here...
	send-message-box-send = Send
	send-message-box-send-file = Send file
	send-message-box-reply-to = Replying to
	send-message-box-remove-reply-to-action = Remove reply-to relationship
	send-message-box-stickers = Send a sticker...
	send-message-box-stickers-popup-title = Send a sticker

	sticker-picker-user-stickers = My stickers

	room-timeline-load-more-action = Load more

	room-invite-accept-action = Accept invite
	room-invite-reject-action = Reject invite
	room-invite-popup-title = Invited
	room-invite-popup-text = You are invited to join this room.
	room-invite-popup-text-with-inviter = You are invited to join this room by { $inviterName }.

	## State events
	## Common parameters:
	## gender = gender of the sender (male/female/neutral)
	## stateKeyUser = name of the state key user
	## stateKeyUserGender = gender of the state key user
	member-state-joined-room = joined the room.
	member-state-changed-name-and-avatar = changed { $gender ->
	[male] his
	[female] her
	*[neutral] their
	} name and avatar.
	member-state-changed-name = changed { $gender ->
	[male] his
	[female] her
	*[neutral] their
	} name.
	member-state-changed-avatar = changed { $gender ->
	[male] his
	[female] her
	*[neutral] their
	} avatar.
	member-state-invited = invited { $stateKeyUser } to the room.
	member-state-left = left the room.
	member-state-kicked = kicked { $stateKeyUser }.
	member-state-banned = banned { $stateKeyUser }.
	member-state-unbanned = unbanned { $stateKeyUser }.

	state-room-created = created the room.
	state-room-name-changed = changed the name of the room to { $newName }.
	state-room-topic-changed = changed the topic of the room to { $newTopic }.
	state-room-avatar-changed = changed the avatar of the room.
	state-room-pinned-events-changed = changed the pinned events of the room.
	state-room-alias-changed = changed the aliases of the room.
	state-room-join-rules-changed = changed join rules of the room.
	state-room-power-levels-changed = changed power levels of the room.
	state-room-encryption-activated = enabled encryption for this room.

	event-message-image-sent = sent an image "{ $body }".
	event-message-file-sent = sent a file "{ $body }".
	event-message-video-sent = sent a video "{ $body }".
	event-message-audio-sent = sent an audio "{ $body }".
	event-message-audio-play-audio = Play audio
	event-sending = Sending...
	event-send-failed = Failed to send
	event-resend = Retry sending this event
	event-deleted = (Deleted)
	event-delete = Delete
	event-delete-failed = Error deleting event. Error code: { $errorCode }. Error message: { $errorMsg }.
	event-view-source = View source...
	event-source-popup-title = Event source
	event-source-decrypted = Decrypted event source
	event-source-original = Original event source
	event-reply-action = Reply
	event-popup-action = More about this event...
	event-reacted-with = Reacted with "{ $key }"
	event-react-action = React...
	event-react-popup-title = React to a message
	event-react-accept-action = React
	event-react-cancel-action = Cancel
	event-react-with-prompt = React with:
	event-encrypted = This message is encrypteed
	event-msgtype-fallback-text = Unknown message type: { $msgtype }
	event-fallback-text = Unknown event: { $type }
	event-cannot-decrypt-text = (Encrypted content)
	event-read-indicator-more = +{ $rest }
	event-read-indicator-list-title = Read by { $numUsers ->
	[1] 1 user
	*[other] { $numUsers } users
	}
	+event-edited-indicator = (edited)

	media-file-menu-option-view = View
	media-file-menu-option-save-as = Save as
	media-file-menu-add-sticker-action = Add to sticker...

	add-sticker-popup-title = Add to sticker
	add-sticker-popup-short-code-prompt = Short code:
	add-sticker-popup-short-code-exists-warning = The short code already exists in this pack. The sticker above will override the existing one.
	add-sticker-popup-add-sticker-button = Add
	add-sticker-popup-cancel-button = Cancel
	add-sticker-popup-failed-prompt = Unable to add sticker. Error code: { $errorCode }. Error message: { $errorMsg }.

	kazv-io-download-success-prompt = Download successful
	kazv-io-download-failure-prompt = Download failure: { $detail }
	kazv-io-failure-detail-user-cancel = User canceled
	kazv-io-failure-detail-network-error = Network error
	kazv-io-failure-detail-open-file-error = Open file error
	kazv-io-failure-detail-write-file-error = Write file error
	kazv-io-failure-detail-hash-error = Hash check error
	kazv-io-failure-detail-kazv-error = Unknow Error, please report this as bug.
	kazv-io-upload-failure-prompt = Upload failure: { $detail }
	kazv-io-downloading-prompt = Downloading: { $fileName }
	kazv-io-uploading-prompt = Uploading: { $fileName }
	kazv-io-prompt-close = Got it
	kazv-io-pause = Pause
	kazv-io-resume = Resume
	kazv-io-cancel = Cancel

	create-room-page-title = Create room
	create-room-page-type-prompt = Room type:
	create-room-page-type-public = Public (everyone can join)
	create-room-page-type-private = Private (only invited users can join)
	create-room-page-type-direct = Direct message (same as private, but those initially invited get admin permissions)
	create-room-page-name-prompt = Room name (optional):
	create-room-page-name-placeholder = No name
	create-room-page-alias-prompt = Room alias (optional):
	create-room-page-alias-placeholder = #foo:example.org
	create-room-page-topic-prompt = Room topic (optional):
	create-room-page-topic-placeholder = No topic
	create-room-page-allow-federate-prompt = Allow users from other servers to join
	create-room-page-action-create-room = Create room
	create-room-page-success-prompt = Room created.
	create-room-page-failed-prompt = Unable to create room. Error code: { $errorCode }. Error message: { $errorMsg }.
	create-room-invite-userids-prompt = Matrix ids of users to invite:
	create-room-page-add-invite-prompt = Add a new user to invite:
	create-room-page-add-invite-placeholder = Matrix id, e.g. @foo:example.org
	create-room-page-action-add-invite = Add
	create-room-page-action-remove-invite = Remove

	join-room-page-title = Join room
	join-room-page-id-or-alias-prompt = Room id or alias:
	join-room-page-id-or-alias-placeholder = #foo:example.org or !abcdef:example.org
	join-room-page-servers-prompt = Via servers (optional, separated by newlines):
	join-room-page-servers-placeholder =
	example.org
	example.com
	join-room-page-action-join-room = Join room
	join-room-page-success-prompt = Successfully joined room { $room }.
	join-room-page-failed-prompt = Unable to join room { $room }. Error code: { $errorCode }. Error message: { $errorMsg }.

	leave-room-success-prompt = Successfully left room { $room }.
	leave-room-failed-prompt = Unable to leave room { $room }. Error code: { $errorCode }. Error message: { $errorMsg }.

	device-trust-level-unseen = Unseen
	device-trust-level-seen = Seen
	device-trust-level-verified = Verified
	device-trust-level-blocked = Blocked
	device-set-trust-level = Set trust level...
	device-set-trust-level-dialog-title = Set trust level
	device-set-trust-level-dialog-name-label = Device name: { $name }
	device-set-trust-level-dialog-id-label = Device id: { $id }
	device-set-trust-level-dialog-ed25519-key-label = Ed25519 public key: { $key }
	device-set-trust-level-dialog-curve25519-key-label = Curve25519 public key: { $key }
	device-set-trust-level-dialog-save = Save
	device-set-trust-level-dialog-cancel = Cancel

	settings-page-title = Settings
	settings-save = Save settings
	settings-profile-load-failed-prompt = Unable to load profile. Error code: { $errorCode }. Error message: { $errorMsg }.
	settings-profile-change-avatar = Change avatar...
	settings-profile-display-name = Display name:
	settings-profile-save-failed-prompt = Unable to save profile. Error code: { $errorCode }. Error message: { $errorMsg }.
	settings-cache-directory = Cache directory:

	typing-indicator = { $typingUser } { $otherNum ->
	[0] is typing...
	[1] and { $secondTypingUser } are typing...
	*[other] and { $otherNum } others are typing...
	}

	notification-message = <b>{ $user }:</b> { $message }
	notification-message-no-content = <b>{ $user }</b> sent you a message.

	user-page-power-level = Power level: { $powerLevel }
	user-page-edit-power-level-action = Edit
	user-page-save-power-level-action = Save
	user-page-discard-power-level-action = Discard
	user-page-set-power-level-failed-prompt = Unable to set power level. Error code: { $errorCode }. Error message: { $errorMsg }.
	user-page-kick-user-action = Kick
	user-page-kick-user-confirm-dialog-title = Kicking user
	user-page-kick-user-confirm-dialog-content = Are you sure you want to kick { $name } ({ $userId }) out of { $roomName }?
	user-page-kick-user-reason-prompt = Reason (optional):
	user-page-kick-user-failed-prompt = Unable to kick user. Error code: { $errorCode }. Error message: { $errorMsg }.

	user-page-ban-user-action = Ban
	user-page-ban-user-confirm-dialog-title = Banning user
	user-page-ban-user-confirm-dialog-content = Are you sure you want to ban { $name } ({ $userId }) in { $roomName }?
	user-page-ban-user-reason-prompt = Reason (optional):
	user-page-ban-user-failed-prompt = Unable to ban user. Error code: { $errorCode }. Error message: { $errorMsg }.
	user-page-unban-user-action = Unban
	user-page-unban-user-failed-prompt = Unable to unban user. Error code: { $errorCode }. Error message: { $errorMsg }.

	room-invite-page-title = Inviting user to { $room }
	room-invite-page-invite-failed-prompt = Unable to invite user. Error code: { $errorCode }. Error message: { $errorMsg }.
	room-invite-invitee-matrix-id-placeholder = Matrix id of the user, e.g. @foo:example.org
	room-invite-invitee-matrix-id-prompt = User to invite:
	room-invite-page-invite-button = Invite
	room-invite-action = Invite to room...

	confirm-upload-popup-title = Confirm upload
	confirm-upload-popup-prompt = You are about to upload "{ $file }" ({ $current } / { $total }).
	confirm-upload-popup-prompt-single-file = You are about to upload "{ $file }".
	confirm-upload-popup-accept-button = Upload
	confirm-upload-popup-cancel-button = Cancel
	diff --git a/src/matrix-event.cpp b/src/matrix-event.cpp
	index daabfb0..60b168e 100644
	--- a/src/matrix-event.cpp
	+++ b/src/matrix-event.cpp
	@@ -1,139 +1,182 @@
	/*
	* This file is part of kazv.
	* SPDX-FileCopyrightText: 2020-2023 tusooa <tusooa@kazv.moe>
	* SPDX-License-Identifier: AGPL-3.0-or-later
	*/
	#include <libkazv-config.hpp>

	#include <immer/config.hpp> // https://github.com/arximboldi/immer/issues/168

	#include "matrix-event.hpp"
	#include "matrix-event-reader-list-model.hpp"

	#include "helper.hpp"
	#include "kazv-log.hpp"

	using namespace Kazv;

	static std::optional<LocalEchoDesc> getLocalEcho(std::variant<Event, LocalEchoDesc> event)
	{
	if (std::holds_alternative<LocalEchoDesc>(event)) {
	return std::get<LocalEchoDesc>(event);
	} else {
	return std::nullopt;
	}
	}

	static Event getEvent(std::variant<Event, LocalEchoDesc> event)
	{
	if (std::holds_alternative<LocalEchoDesc>(event)) {
	return std::get<LocalEchoDesc>(event).event;
	} else {
	return std::get<Event>(event);
	}
	}

	MatrixEvent::MatrixEvent(lager::reader<std::variant<Event, LocalEchoDesc>> event, std::optional<Room> room, QObject *parent)
	: QObject(parent)
	, m_localEcho(event.map(getLocalEcho))
	, m_event(event.map(getEvent))
	, m_room(room)
	- , LAGER_QT(eventId)(m_event.xform(zug::map([](Event e) { return e.id(); }) \| strToQt))
	- , LAGER_QT(sender)(m_event.xform(zug::map([](Event e) { return e.sender(); }) \| strToQt))
	+ , m_eventIdStd(m_event.map(&Event::id))
	+ , m_senderStd(m_event.map(&Event::sender))
	+ , m_originalContent(m_event.map([](Event e) { return e.content().get().get<QJsonObject>(); }))
	+ , m_edits(m_room.has_value() ? lager::reader<EventList>(lager::with(
	+ m_event,
	+ m_room->relatedEvents(m_eventIdStd, "m.replace")
	+ ).map([](const Event &origEvent, const EventList &edits) -> EventList {
	+ // https://spec.matrix.org/v1.10/client-server-api/#event-replacements
	+ if (!(
	+ // (3) no state key
	+ !origEvent.isState()
	+ // (4) original event is not an edit
	+ && origEvent.relationship().first != "m.replace"
	+ )) {
	+ return EventList{};
	+ }
	+ auto origType = origEvent.type();
	+ auto origSender = origEvent.sender();
	+ return intoImmer(
	+ EventList{},
	+ zug::filter([&origType, &origSender](const Event &ev) {
	+ return
	+ // (0) same room id requirement is implicit.
	+ // (1) same sender
	+ origSender == ev.sender()
	+ // (2) same type
	+ && origType == ev.type()
	+ // (3) no state key
	+ && !ev.isState()
	+ // (4) original event is not an edit is checked above
	+ // (5) replaced event content has `m.new_content`
	+ && ev.content().get().contains("m.new_content");
	+ }),
	+ edits
	+ );
	+ })) : lager::make_constant(EventList{}))
	+ , LAGER_QT(eventId)(m_eventIdStd.xform(strToQt))
	+ , LAGER_QT(sender)(m_senderStd.xform(strToQt))
	, LAGER_QT(type)(m_event.xform(zug::map([](Event e) { return e.type(); }) \| strToQt))
	, LAGER_QT(stateKey)(m_event.xform(zug::map([](Event e) { return e.stateKey(); }) \| strToQt))
	- , LAGER_QT(content)(m_event.xform(zug::map([](Event e) { return e.content().get().get<QJsonObject>(); })))
	+ , LAGER_QT(content)(lager::with(m_originalContent, m_edits).map([](const QJsonObject &origContent, const EventList &edits) {
	+ if (edits.empty()) {
	+ return origContent;
	+ } else {
	+ return edits.at(edits.size() - 1).content().get().at("m.new_content").get<QJsonObject>();
	+ }
	+ }))
	, LAGER_QT(encrypted)(m_event.xform(zug::map([](Event e) { return e.encrypted(); })))
	, LAGER_QT(decrypted)(m_event.map([](Event e) { return e.decrypted(); }))
	, LAGER_QT(isState)(m_event.map([](Event e) { return e.isState(); }))
	, LAGER_QT(unsignedData)(m_event.map([](Event e) {
	auto j = e.raw();
	if (j.get().contains("unsigned")) {
	return j.get()["unsigned"].template get<QJsonObject>();
	} else {
	return QJsonObject();
	}
	}))
	, LAGER_QT(isLocalEcho)(m_localEcho.map([](const auto &maybe) { return maybe.has_value(); }))
	, LAGER_QT(isSending)(m_localEcho.map([](const auto &maybe) {
	return maybe.has_value() && maybe.value().status == LocalEchoDesc::Sending;
	}))
	, LAGER_QT(isFailed)(m_localEcho.map([](const auto &maybe) {
	return maybe.has_value() && maybe.value().status == LocalEchoDesc::Failed;
	}))
	, LAGER_QT(txnId)(m_localEcho.map([](const auto &maybe) {
	return maybe.has_value() ? QString::fromStdString(maybe.value().txnId) : QStringLiteral("");
	}))
	, LAGER_QT(redacted)(m_event.map([](const auto &e) {
	return e.redacted();
	}))
	, LAGER_QT(originalSource)(m_event.map([](Event e) {
	return e.originalJson().get().template get<QJsonObject>();
	}))
	, LAGER_QT(decryptedSource)(m_event.map([](Event e) {
	return e.decrypted() ? e.raw().get().template get<QJsonObject>() : QJsonObject();
	}))
	, LAGER_QT(replyingToEventId)(m_event.map([](Event e) {
	return e.replyingTo();
	}).xform(strToQt))
	, LAGER_QT(relationType)(m_event.map([](Event e) {
	return e.relationship().first;
	}).xform(strToQt))
	, LAGER_QT(relatedEventId)(m_event.map([](Event e) {
	return e.relationship().second;
	}).xform(strToQt))
	, LAGER_QT(formattedTime)(m_event
	.map(&Event::originServerTs)
	.map([](Timestamp ts) {
	auto locale = QLocale::system();
	return locale.toString(
	QDateTime::fromMSecsSinceEpoch(ts).time(),
	QLocale::ShortFormat
	);
	}))
	+ , LAGER_QT(isEdited)(m_edits.map([](const auto &edits) { return !edits.empty(); }))
	{
	}

	MatrixEvent::MatrixEvent(lager::reader<Event> event, std::optional<Kazv::Room> room, QObject *parent)
	: MatrixEvent(event.map([](const auto &e) -> std::variant<Kazv::Event, Kazv::LocalEchoDesc> { return e; }), room, parent)
	{
	}

	MatrixEvent::~MatrixEvent() = default;

	MatrixEventReaderListModel *MatrixEvent::readers() const
	{
	if (!m_room.has_value()) {
	qCDebug(kazvLog) << "readers(): no room!";
	return new MatrixEventReaderListModel(lager::make_constant(immer::flex_vector<std::tuple<Kazv::Event, Kazv::Timestamp>>{}));
	}

	auto eventReaders = lager::with(
	m_room.value().eventReaders(m_event.map(&Event::id)),
	m_room.value().stateEvents()
	).map([](const auto &eventReaders, const auto &states) {
	return intoImmer(
	immer::flex_vector<std::tuple<Kazv::Event, Kazv::Timestamp>>{},
	zug::map([states](const auto &item) -> std::tuple<Kazv::Event, Kazv::Timestamp> {
	auto [userId, ts] = item;
	qCDebug(kazvLog) << "readers(): read by" << QString::fromStdString(userId);
	auto memberEvent = states.count({"m.room.member", userId})
	? states[{"m.room.member", userId}]
	: Event{json{
	{"content", json::object()},
	{"state_key", userId},
	{"type", "m.room.member"},
	}};
	return {memberEvent, ts};
	}),
	eventReaders
	);
	}).make();

	return new MatrixEventReaderListModel(eventReaders);
	}

	Kazv::Event MatrixEvent::underlyingEvent() const
	{
	return m_event.get();
	}
	diff --git a/src/matrix-event.hpp b/src/matrix-event.hpp
	index bd942c8..2c1ab22 100644
	--- a/src/matrix-event.hpp
	+++ b/src/matrix-event.hpp
	@@ -1,62 +1,68 @@
	/*
	* This file is part of kazv.
	* SPDX-FileCopyrightText: 2020-2023 tusooa <tusooa@kazv.moe>
	* SPDX-License-Identifier: AGPL-3.0-or-later
	*/

	#pragma once
	#include <libkazv-config.hpp>

	#include <immer/config.hpp> // https://github.com/arximboldi/immer/issues/168

	#include <QObject>
	#include <QQmlEngine>

	#include <lager/extra/qt.hpp>

	#include <client/room/room.hpp>

	#include "qt-json.hpp"

	class MatrixEventReaderListModel;

	class MatrixEvent : public QObject
	{
	Q_OBJECT
	QML_ELEMENT
	QML_UNCREATABLE("")

	lager::reader<std::optional<Kazv::LocalEchoDesc>> m_localEcho;
	lager::reader<Kazv::Event> m_event;
	std::optional<Kazv::Room> m_room;
	+ lager::reader<std::string> m_eventIdStd;
	+ lager::reader<std::string> m_senderStd;
	+ /// the unedited content of this event
	+ lager::reader<QJsonObject> m_originalContent;
	+ lager::reader<Kazv::EventList> m_edits;

	public:
	explicit MatrixEvent(lager::reader<std::variant<Kazv::Event, Kazv::LocalEchoDesc>> event, std::optional<Kazv::Room> room = std::nullopt, QObject *parent = 0);
	explicit MatrixEvent(lager::reader<Kazv::Event> event, std::optional<Kazv::Room> room = std::nullopt, QObject *parent = 0);
	~MatrixEvent() override;

	LAGER_QT_READER(QString, eventId);
	LAGER_QT_READER(QString, sender);
	LAGER_QT_READER(QString, type);
	LAGER_QT_READER(QString, stateKey);
	LAGER_QT_READER(QJsonObject, content);
	LAGER_QT_READER(bool, encrypted);
	LAGER_QT_READER(bool, decrypted);
	LAGER_QT_READER(bool, isState);
	LAGER_QT_READER(QJsonObject, unsignedData);
	LAGER_QT_READER(bool, isLocalEcho);
	LAGER_QT_READER(bool, isSending);
	LAGER_QT_READER(bool, isFailed);
	LAGER_QT_READER(QString, txnId);
	LAGER_QT_READER(bool, redacted);
	LAGER_QT_READER(QJsonObject, originalSource);
	LAGER_QT_READER(QJsonObject, decryptedSource);
	LAGER_QT_READER(QString, replyingToEventId);
	LAGER_QT_READER(QString, relationType);
	LAGER_QT_READER(QString, relatedEventId);
	LAGER_QT_READER(QString, formattedTime);
	+ LAGER_QT_READER(bool, isEdited);

	Q_INVOKABLE MatrixEventReaderListModel *readers() const;

	Kazv::Event underlyingEvent() const;
	};
	diff --git a/src/tests/matrix-room-timeline-test.cpp b/src/tests/matrix-room-timeline-test.cpp
	index c77fc59..5a524fb 100644
	--- a/src/tests/matrix-room-timeline-test.cpp
	+++ b/src/tests/matrix-room-timeline-test.cpp
	@@ -1,96 +1,133 @@
	/*
	* This file is part of kazv.
	* SPDX-FileCopyrightText: 2023 tusooa <tusooa@kazv.moe>
	* SPDX-License-Identifier: AGPL-3.0-or-later
	*/

	#include <libkazv-config.hpp>
	#include <immer/config.hpp> // https://github.com/arximboldi/immer/issues/168

	#include <memory>

	#include <QtTest>

	#include <factory.hpp>

	#include <matrix-room-timeline.hpp>
	#include <matrix-sdk.hpp>
	#include <matrix-room-list.hpp>
	#include <matrix-room.hpp>
	#include <matrix-event.hpp>
	#include <matrix-event-reader-list-model.hpp>
	#include <matrix-event-reader.hpp>

	#include "test-model.hpp"
	#include "test-utils.hpp"

	using namespace Kazv;
	using namespace Kazv::Factory;

	class MatrixRoomTimelineTest : public QObject
	{
	Q_OBJECT

	private Q_SLOTS:
	void testLocalEcho();
	void testReadReceipts();
	+ void testEdits();
	};

	void MatrixRoomTimelineTest::testLocalEcho()
	{
	auto model = makeTestModel();
	std::unique_ptr<MatrixSdk> sdk{makeTestSdk(model)};
	auto roomList = toUniquePtr(sdk->roomList());
	auto room = toUniquePtr(roomList->room("!foo:tusooa.xyz"));
	auto timeline = toUniquePtr(room->timeline());

	QCOMPARE(timeline->count(), 2);
	auto first = toUniquePtr(timeline->at(1)); // reverse order
	QCOMPARE(first->isSending(), true);
	QCOMPARE(first->isLocalEcho(), true);
	QCOMPARE(first->isFailed(), false);
	QCOMPARE(first->txnId(), "some-txn-id");
	auto second = toUniquePtr(timeline->at(0));
	QCOMPARE(second->isSending(), false);
	QCOMPARE(second->isLocalEcho(), true);
	QCOMPARE(second->isFailed(), true);
	QCOMPARE(second->txnId(), "some-other-txn-id");
	}

	void MatrixRoomTimelineTest::testReadReceipts()
	{
	auto r = makeRoom(withRoomTimeline({
	makeEvent(withEventId("$1")),
	makeEvent(withEventId("$2")),
	}));
	r.eventReadUsers = {{"$1", {"@a:example.com", "@b:example.com"}}};
	r.readReceipts = {{"@a:example.com", {"$1", 1234}}, {"@b:example.com", {"$2", 5678}}};
	auto model = SdkModel{makeClient(withRoom(r))};
	std::unique_ptr<MatrixSdk> sdk{makeTestSdk(model)};
	auto roomList = toUniquePtr(sdk->roomList());
	auto room = toUniquePtr(roomList->room(QString::fromStdString(r.roomId)));
	auto timeline = toUniquePtr(room->timeline());
	{
	auto event = toUniquePtr(timeline->at(1));
	QCOMPARE(event->eventId(), "$1");
	auto readers = toUniquePtr(event->readers());
	QCOMPARE(readers->count(), 2);
	auto reader1 = toUniquePtr(readers->at(0));
	QCOMPARE(reader1->userId(), "@a:example.com");
	QCOMPARE(reader1->timestamp(), 1234);
	auto reader2 = toUniquePtr(readers->at(1));
	QCOMPARE(reader2->userId(), "@b:example.com");
	QCOMPARE(reader2->timestamp(), 5678);
	}

	{
	auto event = toUniquePtr(timeline->at(0));
	QCOMPARE(event->eventId(), "$2");
	auto readers = toUniquePtr(event->readers());
	QCOMPARE(readers->count(), 0);
	}
	}

	+void MatrixRoomTimelineTest::testEdits()
	+{
	+ auto r = makeRoom(withRoomTimeline({
	+ makeEvent(withEventId("$0")),
	+ makeEvent(withEventId("$1") \| withEventRelationship("moe.kazv.mxc.some-rel", "$0")),
	+ makeEvent(withEventId("$2") \| withEventContent(json{{"body", "first"}}) \| withEventRelationship("m.replace", "$1")),
	+ // valid
	+ makeEvent(withEventId("$3") \| withEventContent(json{{"m.new_content", {{"body", "second"}}}}) \| withEventRelationship("m.replace", "$1")),
	+ // also valid
	+ makeEvent(withEventId("$4") \| withEventContent(json{{"m.new_content", {{"body", "third"}}}}) \| withEventRelationship("m.replace", "$1")),
	+ // invalid, changed event type
	+ makeEvent(withEventId("$5") \| withEventContent(json{{"m.new_content", {{"body", "fourth"}}}}) \| withEventRelationship("m.replace", "$1") \| withEventType("moe.kazv.mxc.some-other-type")),
	+ // invalid, changed event sender
	+ makeEvent(withEventId("$6") \| withEventContent(json{{"m.new_content", {{"body", "fifth"}}}}) \| withEventRelationship("m.replace", "$1") \| withEventType("moe.kazv.mxc.some-other-type") \| withEventSenderId("@othersender:example.com")),
	+ // invalid, has state key
	+ makeEvent(withEventId("$7") \| withEventContent(json{{"m.new_content", {{"body", "sixth"}}}}) \| withEventRelationship("m.replace", "$1") \| withEventType("moe.kazv.mxc.some-other-type") \| withStateKey("")),
	+ // invalid, no m.new_content
	+ makeEvent(withEventId("$8") \| withEventContent(json{{"body", "seventh"}}) \| withEventRelationship("m.replace", "$1") \| withEventType("moe.kazv.mxc.some-other-type")),
	+ }));
	+ auto model = SdkModel{makeClient(withRoom(r))};
	+ std::unique_ptr<MatrixSdk> sdk{makeTestSdk(model)};
	+ auto roomList = toUniquePtr(sdk->roomList());
	+ auto room = toUniquePtr(roomList->room(QString::fromStdString(r.roomId)));
	+ auto timeline = toUniquePtr(room->timeline());
	+
	+ auto event = toUniquePtr(timeline->at(7));
	+ QCOMPARE(event->eventId(), "$1");
	+ // the content is taken from the newest valid edit
	+ qDebug() << event->content();
	+ QCOMPARE(event->content(), (QJsonObject{{"body", "third"}}));
	+ // the relation is taken from the original content
	+ QCOMPARE(event->relationType(), "moe.kazv.mxc.some-rel");
	+ QCOMPARE(event->relatedEventId(), "$0");
	+ QVERIFY(event->isEdited());
	+}
	+
	QTEST_MAIN(MatrixRoomTimelineTest)

	#include "matrix-room-timeline-test.moc"

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