Universal Disappearing Messages

2021-06-01 13:45:43 -07:00 · 2021-06-01 13:45:43 -07:00 · 19f8042cd3
commit 19f8042cd3
parent c63871d71b
50 changed files with 1224 additions and 191 deletions
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@ -1801,7 +1801,7 @@
  },
  "disappearingMessages": {
    "message": "Disappearing messages",
-    "description": "Conversation menu option to enable disappearing messages"
+    "description": "Conversation menu option to enable disappearing messages. Title of the settings section for Disappearing Messages"
  },
  "disappearingMessagesDisabled": {
    "message": "Disappearing messages disabled",
@ -5414,5 +5414,63 @@
  "CustomColorEditor__title": {
    "message": "Custom Color",
    "description": "Modal title for the custom color editor"
+  },
+  "customDisappearingTimeOption": {
+    "message": "Custom time...",
+    "description": "Text for an option in Disappearing Messages menu and Conversation Details Disappearing Messages setting when no user value is available"
+  },
+  "selectedCustomDisappearingTimeOption": {
+    "message": "Custom time",
+    "description": "Text for an option in Conversation Details Disappearing Messages setting when user previously selected custom time"
+  },
+  "DisappearingTimeDialog__title": {
+    "message": "Custom Time",
+    "description": "Title for the custom disappearing message timeout dialog"
+  },
+  "DisappearingTimeDialog__body": {
+    "message": "Choose a custom time for disappearing messages.",
+    "description": "Body for the custom disappearing message timeout dialog"
+  },
+  "DisappearingTimeDialog__set": {
+    "message": "Set",
+    "description": "Text for the dialog button confirming the custom disappearing message timeout"
+  },
+  "DisappearingTimeDialog__seconds": {
+    "message": "Seconds",
+    "description": "Name of the 'seconds' unit select for the custom disappearing message timeout dialog"
+  },
+  "DisappearingTimeDialog__minutes": {
+    "message": "Minutes",
+    "description": "Name of the 'minutes' unit select for the custom disappearing message timeout dialog"
+  },
+  "DisappearingTimeDialog__hours": {
+    "message": "Hours",
+    "description": "Name of the 'hours' unit select for the custom disappearing message timeout dialog"
+  },
+  "DisappearingTimeDialog__days": {
+    "message": "Days",
+    "description": "Name of the 'days' unit select for the custom disappearing message timeout dialog"
+  },
+  "DisappearingTimeDialog__weeks": {
+    "message": "Weeks",
+    "description": "Name of the 'weeks' unit select for the custom disappearing message timeout dialog"
+  },
+  "settings__DisappearingMessages__footer": {
+    "message": "Set a default disappearing message timer for all new chats started by you.",
+    "description": "Footer for the Disappearing Messages settings section"
+  },
+  "settings__DisappearingMessages__timer__label": {
+    "message": "Default timer for new chats",
+    "description": "Label for the Disapearring Messages default timer setting"
+  },
+  "UniversalTimerNotification__text": {
+    "message": "The disappearing message time will be set to $timeValue$ when you message them.",
+    "description": "A message displayed when default disappearing message timeout is about to be applied",
+    "placeholders": {
+      "timeValue": {
+        "content": "$1",
+        "example": "1 week"
+      }
+    }
  }
 }
--- a/js/modules/signal.js
+++ b/js/modules/signal.js
@ -59,6 +59,9 @@ const {
 const {
  StagedLinkPreview,
 } = require('../../ts/components/conversation/StagedLinkPreview');
+const {
+  DisappearingTimeDialog,
+} = require('../../ts/components/conversation/DisappearingTimeDialog');

 // State
 const { createTimeline } = require('../../ts/state/roots/createTimeline');
@ -346,6 +349,7 @@ exports.setup = (options = {}) => {
    ProgressModal,
    SafetyNumberChangeDialog,
    StagedLinkPreview,
+    DisappearingTimeDialog,
    Types: {
      Message: MediaGalleryMessage,
    },
--- a/js/settings_start.js
+++ b/js/settings_start.js
@ -48,6 +48,7 @@ const getInitialData = async () => ({

  isPrimary: await window.isPrimary(),
  lastSyncTime: await window.getLastSyncTime(),
+  universalExpireTimer: await window.getUniversalExpireTimer(),
 });

 window.initialRequest = getInitialData();
--- a/js/views/settings_view.js
+++ b/js/views/settings_view.js
@ -12,6 +12,12 @@
  window.Whisper = window.Whisper || {};
  const { Settings } = window.Signal.Types;

+  const {
+    DEFAULT_DURATIONS_IN_SECONDS,
+    DEFAULT_DURATIONS_SET,
+    format: formatExpirationTimer,
+  } = window.Signal.Util.expirationTimer;
+
  const CheckboxView = Whisper.View.extend({
    initialize(options) {
      this.name = options.name;
@ -70,6 +76,106 @@
    },
  });

+  const DisappearingMessagesView = Whisper.View.extend({
+    template: () => $('#disappearingMessagesSettings').html(),
+    initialize(options) {
+      this.timeDialog = null;
+
+      this.value = options.value || 0;
+
+      this.render();
+    },
+
+    render_attributes() {
+      const isCustomValue = this.isCustomValue();
+
+      return {
+        title: i18n('disappearingMessages'),
+        timerValues: DEFAULT_DURATIONS_IN_SECONDS.map(seconds => {
+          const text = formatExpirationTimer(i18n, seconds, {
+            capitalizeOff: true,
+          });
+          return {
+            selected: seconds === this.value ? 'selected' : undefined,
+            value: seconds,
+            text,
+          };
+        }),
+        customSelected: isCustomValue ? 'selected' : undefined,
+        customText: i18n(
+          isCustomValue
+            ? 'selectedCustomDisappearingTimeOption'
+            : 'customDisappearingTimeOption'
+        ),
+        customInfo: isCustomValue
+          ? {
+              text: formatExpirationTimer(i18n, this.value),
+            }
+          : undefined,
+        timerLabel: i18n('settings__DisappearingMessages__timer__label'),
+        footer: i18n('settings__DisappearingMessages__footer'),
+      };
+    },
+
+    events: {
+      change: 'change',
+    },
+
+    change(e) {
+      const value = parseInt(e.target.value, 10);
+
+      if (value === -1) {
+        this.showDialog();
+        return;
+      }
+
+      this.updateValue(value);
+      window.log.info('disappearing-messages-timer changed to', this.value);
+    },
+
+    isCustomValue() {
+      return this.value && !DEFAULT_DURATIONS_SET.has(this.value);
+    },
+
+    showDialog() {
+      this.closeDialog();
+
+      this.timeDialog = new window.Whisper.ReactWrapperView({
+        className: 'disappearing-time-dialog-wrapper',
+        Component: window.Signal.Components.DisappearingTimeDialog,
+        props: {
+          i18n,
+          initialValue: this.value,
+          onSubmit: newValue => {
+            this.updateValue(newValue);
+            this.closeDialog();
+
+            window.log.info(
+              'disappearing-messages-timer changed to custom value',
+              this.value
+            );
+          },
+          onClose: () => {
+            this.closeDialog();
+          },
+        },
+      });
+    },
+
+    closeDialog() {
+      if (this.timeDialog) {
+        this.timeDialog.remove();
+      }
+      this.timeDialog = null;
+    },
+
+    updateValue(newValue) {
+      this.value = newValue;
+      window.setUniversalExpireTimer(newValue);
+      this.render();
+    },
+  });
+
  const RadioButtonGroupView = Whisper.View.extend({
    initialize(options) {
      this.name = options.name;
@ -202,6 +308,15 @@
        value: window.initialData.mediaCameraPermissions,
        setFn: window.setMediaCameraPermissions,
      });
+
+      const disappearingMessagesView = new DisappearingMessagesView({
+        value: window.initialData.universalExpireTimer,
+        name: 'disappearing-messages-setting',
+      });
+      this.$('.disappearing-messages-setting').append(
+        disappearingMessagesView.el
+      );
+
      if (!window.initialData.isPrimary) {
        const syncView = new SyncView().render();
        this.$('.sync-setting').append(syncView.el);
--- a/main.js
+++ b/main.js
@ -1697,6 +1697,8 @@ installSettingsGetter('is-primary');
 installSettingsGetter('sync-request');
 installSettingsGetter('sync-time');
 installSettingsSetter('sync-time');
+installSettingsGetter('universal-expire-timer');
+installSettingsSetter('universal-expire-timer');

 ipc.on('delete-all-data', () => {
  if (mainWindow && mainWindow.webContents) {
--- a/preload.js
+++ b/preload.js
@ -367,6 +367,8 @@ try {
  installGetter('sync-request', 'getSyncRequest');
  installGetter('sync-time', 'getLastSyncTime');
  installSetter('sync-time', 'setLastSyncTime');
+  installGetter('universal-expire-timer', 'getUniversalExpireTimer');
+  installSetter('universal-expire-timer', 'setUniversalExpireTimer');

  ipc.on('delete-all-data', async () => {
    const { deleteAllData } = window.Events;
--- a/protos/SignalStorage.proto
+++ b/protos/SignalStorage.proto
@ -129,5 +129,6 @@ message AccountRecord {
  optional PhoneNumberSharingMode phoneNumberSharingMode       = 12;
  optional bool                   notDiscoverableByPhoneNumber = 13;
  repeated PinnedConversation     pinnedConversations          = 14;
+  optional uint32                 universalExpireTimer         = 17;
  optional bool                   primarySendsSms              = 18;
 }
--- a/settings.html
+++ b/settings.html
@ -1,4 +1,4 @@
-<!-- Copyright 2018-2020 Signal Messenger, LLC -->
+<!-- Copyright 2018-2021 Signal Messenger, LLC -->
 <!-- SPDX-License-Identifier: AGPL-3.0-only -->

 <html>
@ -38,6 +38,42 @@
      </p>
    </div>
 </script>
+<script type='text/x-tmpl-mustache' id='disappearingMessagesSettings'>
+    <h3>{{ title }}</h3>
+    <div class="disappearing-messages-setting__timer {{#customInfo}}disappearing-messages-setting__timer--with-info{{/customInfo}}">
+      <label
+        class="disappearing-messages-setting__timer__label"
+        for='disappearing-messages-timer'
+      >
+        {{ timerLabel }}
+      </label>
+      <div class="disappearing-messages-setting__timer__right">
+        <div class="module-select">
+          <select
+            name='disappearing-messages-timer'
+            id='disappearing-messages-timer'
+          >
+            {{#timerValues}}
+              <option value="{{value}}" {{selected}}>
+                {{ text }}
+              </option>
+            {{/timerValues}}
+            <option value="-1" {{customSelected}}>
+              {{customText}}
+            </option>
+          </select>
+        </div>
+        {{#customInfo}}
+          <div class="disappearing-messages-setting__timer__right__info">
+            {{text}}
+          </div>
+        {{/customInfo}}
+      </div>
+    </div>
+    <div class='disappearing-messages-setting__footer'>
+      {{ footer }}
+    </div>
+</script>
 <script type='text/x-tmpl-mustache' id='settings'>
  <div class='content'>
    <a class='x close' alt='close settings' href='#'></a>
@ -163,6 +199,9 @@
    </div>
    <div class='sync-setting'></div>
    <hr>
+    <div class='disappearing-messages-setting'>
+    </div>
+    <hr>
    <div class='clear-data-settings'>
      <h3>{{ clearDataHeader }}</h3>
      <div>
@ -174,6 +213,7 @@
 </script>
 <script type='text/javascript' src='js/components.js'></script>
 <script type='text/javascript' src='ts/backboneJquery.js'></script>
+<script type='text/javascript' src='js/views/react_wrapper_view.js'></script>
 <script type='text/javascript' src='js/views/settings_view.js'></script>
 <script type='text/javascript' src='js/settings_start.js'></script>
 </html>
--- a/settings_preload.js
+++ b/settings_preload.js
@ -98,6 +98,8 @@ window.isPrimary = makeGetter('is-primary');
 window.makeSyncRequest = makeGetter('sync-request');
 window.getLastSyncTime = makeGetter('sync-time');
 window.setLastSyncTime = makeSetter('sync-time');
+window.getUniversalExpireTimer = makeGetter('universal-expire-timer');
+window.setUniversalExpireTimer = makeSetter('universal-expire-timer');

 window.deleteAllData = () => ipcRenderer.send('delete-all-data');

@ -130,6 +132,9 @@ function makeSetter(name) {
 }

 window.Backbone = require('backbone');
+window.React = require('react');
+window.ReactDOM = require('react-dom');
+
 require('./ts/backbone/views/whisper_view');
 require('./ts/backbone/views/toast_view');
 require('./ts/logging/set_up_renderer_logging').initialize();
--- a/stylesheets/_modules.scss
+++ b/stylesheets/_modules.scss
@ -2461,6 +2461,19 @@ $timer-icons: '55', '50', '45', '40', '35', '30', '25', '20', '15', '10', '05',
  margin-top: 1px;
 }

+// Module: Universal Timer Notification
+
+.module-universal-timer-notification {
+  text-align: center;
+
+  @include light-theme {
+    color: $color-gray-60;
+  }
+  @include dark-theme {
+    color: $color-gray-05;
+  }
+}
+
 .module-notification--with-click-handler {
  cursor: pointer;
 }
@ -3096,7 +3109,8 @@ button.module-conversation-details__action-button {
      margin-right: 12px;
    }

-    &__info {
+    &__info,
+    &__right-info {
      @include font-body-2;
      margin-top: 4px;

@ -3110,7 +3124,17 @@ button.module-conversation-details__action-button {
    }

    &__right {
+      position: relative;
      color: $color-gray-45;
+      min-width: 143px;
+    }
+
+    &__right-info {
+      position: absolute;
+
+      @include font-subtitle;
+
+      padding-left: 14px;
    }

    &__actions {
@ -3170,60 +3194,6 @@ button.module-conversation-details__action-button {
      @include font-body-1-bold;
    }
  }
-
-  &-select {
-    position: relative;
-
-    select {
-      @include font-body-2;
-      -webkit-appearance: none;
-      border-radius: 4px;
-      border: 1px solid $color-gray-25;
-      cursor: pointer;
-      height: 40px;
-      min-width: 124px;
-      outline: 0;
-      padding: 10px;
-      padding-left: 12px;
-      padding-right: 32px;
-      text-overflow: ellipsis;
-      width: 100%;
-
-      @include dark-theme {
-        background-color: $color-gray-90;
-        border-color: $color-gray-60;
-        color: $color-gray-05;
-      }
-
-      &:focus {
-        border: 3px solid $color-ultramarine;
-        line-height: 14px;
-        padding-left: 10px;
-      }
-    }
-
-    &::after {
-      border: 2px solid $color-gray-60;
-      border-radius: 2px;
-      border-right: 0;
-      border-top: 0;
-      content: ' ';
-      display: block;
-      height: 10px;
-      pointer-events: none;
-      position: absolute;
-      right: 15px;
-      top: 14px;
-      transform-origin: center;
-      transform: rotate(-45deg);
-      width: 10px;
-      z-index: 2;
-
-      @include dark-theme {
-        border-color: $color-gray-15;
-      }
-    }
-  }
 }

 // Module: Message Detail
--- a/stylesheets/_settings.scss
+++ b/stylesheets/_settings.scss
@ -7,6 +7,7 @@
  &.modal {
    padding: 0;
    background-color: transparent;
+    z-index: 1;

    .content {
      margin: 0;
@ -77,4 +78,39 @@
    @include font-body-2;
    color: $color-gray-60;
  }
+
+  .disappearing-messages-setting {
+    &__timer {
+      display: flex;
+      flex-direction: row;
+      align-items: center;
+
+      &__label {
+        flex-grow: 1;
+        margin-right: 20px;
+      }
+
+      margin-bottom: 10px;
+
+      &__right {
+        position: relative;
+        &__info {
+          position: absolute;
+
+          @include font-subtitle;
+
+          padding-left: 14px;
+        }
+      }
+
+      &--with-info {
+        margin-bottom: 16px;
+      }
+    }
+
+    &__footer {
+      @include font-body-2;
+      color: $color-gray-60;
+    }
+  }
 }
--- a/stylesheets/components/ConversationHeader.scss
+++ b/stylesheets/components/ConversationHeader.scss
@ -2,6 +2,30 @@
 // SPDX-License-Identifier: AGPL-3.0-only

 .module-ConversationHeader {
+  @mixin icon-element($icon, $margin-right: 4px) {
+    display: flex;
+    align-items: center;
+    user-select: none;
+    white-space: nowrap;
+    text-overflow: ellipsis;
+    overflow: hidden;
+
+    &::before {
+      content: '';
+      width: 13px;
+      height: 13px;
+      display: block;
+      margin-right: $margin-right;
+
+      @include light-theme {
+        @include color-svg($icon, $color-gray-60);
+      }
+      @include dark-theme {
+        @include color-svg($icon, $color-gray-25);
+      }
+    }
+  }
+
  --button-spacing: 24px;

  &.module-ConversationHeader--narrow {
@ -133,37 +157,13 @@
          color: $color-gray-25;
        }

-        @mixin subtitle-element($icon) {
-          display: flex;
-          align-items: center;
-          user-select: none;
-          white-space: nowrap;
-          text-overflow: ellipsis;
-          overflow: hidden;
-
-          &::before {
-            content: '';
-            width: 13px;
-            height: 13px;
-            display: block;
-            margin-right: 4px;
-
-            @include light-theme {
-              @include color-svg($icon, $color-gray-60);
-            }
-            @include dark-theme {
-              @include color-svg($icon, $color-gray-25);
-            }
-          }
-        }
-
        &__expiration {
-          @include subtitle-element('../images/icons/v2/timer-24.svg');
+          @include icon-element('../images/icons/v2/timer-24.svg');
          margin-right: 12px;
        }

        &__verified {
-          @include subtitle-element('../images/icons/v2/check-24.svg');
+          @include icon-element('../images/icons/v2/check-24.svg');
        }
      }
    }
@ -308,4 +308,13 @@
      }
    }
  }
+
+  &__disappearing-timer__item {
+    padding-left: 25px;
+
+    &--active {
+      padding-left: 0px;
+      @include icon-element('../images/icons/v2/check-24.svg', 12px);
+    }
+  }
 }
--- a/stylesheets/components/DisappearingTimeDialog.scss
+++ b/stylesheets/components/DisappearingTimeDialog.scss
@ -0,0 +1,25 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+.module-disappearing-time-dialog {
+  &__title.module-Modal__title {
+    margin-bottom: 2px;
+  }
+
+  &__body p {
+    margin: 0 0 25px 0;
+  }
+
+  &__time-boxes {
+    display: flex;
+    flex-direction: row;
+
+    .module-select {
+      flex-grow: 1;
+    }
+
+    &__units {
+      margin-left: 9px;
+    }
+  }
+}
--- a/stylesheets/components/Select.scss
+++ b/stylesheets/components/Select.scss
@ -0,0 +1,55 @@
+.module-select {
+  position: relative;
+
+  select {
+    @include font-body-2;
+    -webkit-appearance: none;
+    border-radius: 4px;
+    border: 1px solid $color-gray-25;
+    cursor: pointer;
+    height: 40px;
+    min-width: 124px;
+    outline: 0;
+    padding: 10px;
+    padding-left: 12px;
+    padding-right: 32px;
+    text-overflow: ellipsis;
+    width: 100%;
+
+    @include dark-theme {
+      background-color: $color-gray-90;
+      border-color: $color-gray-60;
+      color: $color-gray-05;
+    }
+
+    @include keyboard-mode {
+      &:focus {
+        border: 3px solid $color-ultramarine;
+        line-height: 14px;
+        padding-left: 10px;
+      }
+    }
+  }
+
+  &::after {
+    border: 2px solid $color-gray-60;
+    border-radius: 2px;
+    border-right: 0;
+    border-top: 0;
+    content: ' ';
+    display: block;
+    height: 10px;
+    pointer-events: none;
+    position: absolute;
+    right: 15px;
+    top: 14px;
+    transform-origin: center;
+    transform: rotate(-45deg);
+    width: 10px;
+    z-index: 2;
+
+    @include dark-theme {
+      border-color: $color-gray-15;
+    }
+  }
+}
--- a/stylesheets/manifest.scss
+++ b/stylesheets/manifest.scss
@ -41,6 +41,7 @@
@import './components/ContactSpoofingReviewDialogPerson.scss';
@import './components/ConversationHeader.scss';
@import './components/CustomColorEditor.scss';
+@import './components/DisappearingTimeDialog.scss';
@import './components/EditConversationAttributesModal.scss';
@import './components/ForwardMessageModal.scss';
@import './components/GradientDial.scss';
@ -55,5 +56,6 @@
@import './components/SearchResultsLoadingFakeRow.scss';
@import './components/Slider.scss';
@import './components/Tabs.scss';
+@import './components/Select.scss';
@import './components/TimelineWarning.scss';
@import './components/TimelineWarnings.scss';
--- a/ts/background.ts
+++ b/ts/background.ts
@ -34,6 +34,7 @@ import {
  RetryRequestType,
 } from './textsecure/MessageReceiver';
 import { connectToServerWithStoredCredentials } from './util/connectToServerWithStoredCredentials';
+import * as universalExpireTimer from './util/universalExpireTimer';

 const MAX_ATTACHMENT_DOWNLOAD_AGE = 3600 * 72 * 1000;

@ -513,6 +514,15 @@ export async function startApp(): Promise<void> {
      getLastSyncTime: () => window.storage.get('synced_at'),
      setLastSyncTime: (value: number) =>
        window.storage.put('synced_at', value),
+      getUniversalExpireTimer: (): number | undefined => {
+        return universalExpireTimer.get();
+      },
+      setUniversalExpireTimer: async (
+        newValue: number | undefined
+      ): Promise<void> => {
+        await universalExpireTimer.set(newValue);
+        window.Signal.Services.storageServiceUploadJob();
+      },

      addDarkOverlay: () => {
        if ($('.dark-overlay').length) {
--- a/ts/components/ConfirmationDialog.tsx
+++ b/ts/components/ConfirmationDialog.tsx
@ -14,6 +14,7 @@ export type ActionSpec = {
 };

 export type OwnProps = {
+  readonly moduleClassName?: string;
  readonly actions?: Array<ActionSpec>;
  readonly cancelText?: string;
  readonly children?: React.ReactNode;
@ -22,6 +23,7 @@ export type OwnProps = {
  readonly onClose: () => unknown;
  readonly title?: string | React.ReactNode;
  readonly theme?: Theme;
+  readonly hasXButton?: boolean;
 };

 export type Props = OwnProps;
@ -48,6 +50,7 @@ function getButtonVariant(

 export const ConfirmationDialog = React.memo(
  ({
+    moduleClassName,
    actions = [],
    cancelText,
    children,
@ -56,6 +59,7 @@ export const ConfirmationDialog = React.memo(
    onClose,
    theme,
    title,
+    hasXButton,
  }: Props) => {
    const cancelAndClose = React.useCallback(() => {
      if (onCancel) {
@ -76,7 +80,14 @@ export const ConfirmationDialog = React.memo(
    const hasActions = Boolean(actions.length);

    return (
-      <Modal i18n={i18n} onClose={cancelAndClose} title={title} theme={theme}>
+      <Modal
+        moduleClassName={moduleClassName}
+        i18n={i18n}
+        onClose={cancelAndClose}
+        title={title}
+        theme={theme}
+        hasXButton={hasXButton}
+      >
        {children}
        <Modal.ButtonFooter>
          <Button
--- a/ts/components/Select.stories.tsx
+++ b/ts/components/Select.stories.tsx
@ -0,0 +1,31 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React, { useState } from 'react';
+import { action } from '@storybook/addon-actions';
+import { storiesOf } from '@storybook/react';
+
+import { Select } from './Select';
+
+const story = storiesOf('Components/Select', module);
+
+story.add('Normal', () => {
+  const [value, setValue] = useState(0);
+
+  const onChange = action('onChange');
+
+  return (
+    <Select
+      options={[
+        { value: 1, text: '1' },
+        { value: 2, text: '2' },
+        { value: 3, text: '3' },
+      ]}
+      value={value}
+      onChange={newValue => {
+        onChange(newValue);
+        setValue(parseInt(newValue, 10));
+      }}
+    />
+  );
+});
--- a/ts/components/Select.tsx
+++ b/ts/components/Select.tsx
@ -0,0 +1,39 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React from 'react';
+import classNames from 'classnames';
+
+export type Option = Readonly<{
+  text: string;
+  value: string | number;
+}>;
+
+export type PropsType = Readonly<{
+  moduleClassName?: string;
+  options: ReadonlyArray<Option>;
+  onChange(value: string): void;
+  value: string | number;
+}>;
+
+export function Select(props: PropsType): JSX.Element {
+  const { moduleClassName, value, options, onChange } = props;
+
+  const onSelectChange = (event: React.ChangeEvent<HTMLSelectElement>) => {
+    onChange(event.target.value);
+  };
+
+  return (
+    <div className={classNames(['module-select', moduleClassName])}>
+      <select value={value} onChange={onSelectChange}>
+        {options.map(({ text, value: optionValue }) => {
+          return (
+            <option value={optionValue} key={optionValue} aria-label={text}>
+              {text}
+            </option>
+          );
+        })}
+      </select>
+    </div>
+  );
+}
--- a/ts/components/conversation/ConversationHeader.stories.tsx
+++ b/ts/components/conversation/ConversationHeader.stories.tsx
@ -107,7 +107,7 @@ const stories: Array<ConversationHeaderStory> = [
          name: 'Joyrey 🔥 Leppey',
          phoneNumber: '(202) 555-0002',
          type: 'direct',
-          id: '2',
+          id: '3',
          acceptedMessageRequest: true,
        },
      },
@ -119,7 +119,7 @@ const stories: Array<ConversationHeaderStory> = [
          isVerified: false,
          phoneNumber: '(202) 555-0003',
          type: 'direct',
-          id: '3',
+          id: '4',
          title: '🔥Flames🔥',
          profileName: '🔥Flames🔥',
          acceptedMessageRequest: true,
@ -132,7 +132,7 @@ const stories: Array<ConversationHeaderStory> = [
          title: '(202) 555-0011',
          phoneNumber: '(202) 555-0011',
          type: 'direct',
-          id: '11',
+          id: '5',
          acceptedMessageRequest: true,
        },
      },
@ -145,7 +145,7 @@ const stories: Array<ConversationHeaderStory> = [
          phoneNumber: '(202) 555-0004',
          title: '(202) 555-0004',
          type: 'direct',
-          id: '4',
+          id: '6',
          acceptedMessageRequest: true,
        },
      },
@ -157,7 +157,7 @@ const stories: Array<ConversationHeaderStory> = [
          title: '(202) 555-0005',
          phoneNumber: '(202) 555-0005',
          type: 'direct',
-          id: '5',
+          id: '7',
          expireTimer: 10,
          acceptedMessageRequest: true,
        },
@ -170,10 +170,11 @@ const stories: Array<ConversationHeaderStory> = [
          title: '(202) 555-0005',
          phoneNumber: '(202) 555-0005',
          type: 'direct',
-          id: '5',
-          expireTimer: 60,
+          id: '8',
+          expireTimer: 300,
          acceptedMessageRequest: true,
          isVerified: true,
+          canChangeTimer: true,
        },
      },
      {
@ -184,7 +185,7 @@ const stories: Array<ConversationHeaderStory> = [
          title: '(202) 555-0006',
          phoneNumber: '(202) 555-0006',
          type: 'direct',
-          id: '6',
+          id: '9',
          acceptedMessageRequest: true,
          muteExpiresAt: new Date('3000-10-18T11:11:11Z').valueOf(),
        },
@ -197,7 +198,7 @@ const stories: Array<ConversationHeaderStory> = [
          title: '(202) 555-0006',
          phoneNumber: '(202) 555-0006',
          type: 'direct',
-          id: '6',
+          id: '10',
          acceptedMessageRequest: true,
          isSMSOnly: true,
        },
@ -217,7 +218,7 @@ const stories: Array<ConversationHeaderStory> = [
          title: 'Typescript support group',
          name: 'Typescript support group',
          phoneNumber: '',
-          id: '1',
+          id: '11',
          type: 'group',
          expireTimer: 10,
          acceptedMessageRequest: true,
@ -232,7 +233,7 @@ const stories: Array<ConversationHeaderStory> = [
          title: 'Typescript support group',
          name: 'Typescript support group',
          phoneNumber: '',
-          id: '2',
+          id: '12',
          type: 'group',
          left: true,
          expireTimer: 10,
@ -248,7 +249,7 @@ const stories: Array<ConversationHeaderStory> = [
          title: 'Typescript support group',
          name: 'Typescript support group',
          phoneNumber: '',
-          id: '1',
+          id: '13',
          type: 'group',
          expireTimer: 10,
          acceptedMessageRequest: true,
@ -263,7 +264,7 @@ const stories: Array<ConversationHeaderStory> = [
          title: 'Way too many messages',
          name: 'Way too many messages',
          phoneNumber: '',
-          id: '1',
+          id: '14',
          type: 'group',
          expireTimer: 10,
          acceptedMessageRequest: true,
@ -284,7 +285,7 @@ const stories: Array<ConversationHeaderStory> = [
          color: 'blue',
          title: '(202) 555-0007',
          phoneNumber: '(202) 555-0007',
-          id: '7',
+          id: '15',
          type: 'direct',
          isMe: true,
          acceptedMessageRequest: true,
@ -304,7 +305,7 @@ const stories: Array<ConversationHeaderStory> = [
          color: 'blue',
          title: '(202) 555-0007',
          phoneNumber: '(202) 555-0007',
-          id: '7',
+          id: '16',
          type: 'direct',
          isMe: false,
          acceptedMessageRequest: false,
--- a/ts/components/conversation/ConversationHeader.tsx
+++ b/ts/components/conversation/ConversationHeader.tsx
@ -13,6 +13,7 @@ import {
 } from 'react-contextmenu';

 import { Emojify } from './Emojify';
+import { DisappearingTimeDialog } from './DisappearingTimeDialog';
 import { Avatar, AvatarSize } from '../Avatar';
 import { InContactsIcon } from '../InContactsIcon';

@ -92,10 +93,18 @@ export type PropsType = PropsDataType &
  PropsActionsType &
  PropsHousekeepingType;

+enum ModalState {
+  NothingOpen,
+  CustomDisappearingTimeout,
+}
+
 type StateType = {
  isNarrow: boolean;
+  modalState: ModalState;
 };

+const TIMER_ITEM_CLASS = 'module-ConversationHeader__disappearing-timer__item';
+
 export class ConversationHeader extends React.Component<PropsType, StateType> {
  private showMenuBound: (event: React.MouseEvent<HTMLButtonElement>) => void;

@ -106,7 +115,7 @@ export class ConversationHeader extends React.Component<PropsType, StateType> {
  public constructor(props: PropsType) {
    super(props);

-    this.state = { isNarrow: false };
+    this.state = { isNarrow: false, modalState: ModalState.NothingOpen };

    this.menuTriggerRef = React.createRef();
    this.showMenuBound = this.showMenu.bind(this);
@ -355,6 +364,7 @@ export class ConversationHeader extends React.Component<PropsType, StateType> {
      i18n,
      acceptedMessageRequest,
      canChangeTimer,
+      expireTimer,
      isArchived,
      isMe,
      isPinned,
@ -427,23 +437,60 @@ export class ConversationHeader extends React.Component<PropsType, StateType> {

    const hasGV2AdminEnabled = isGroup && groupVersion === 2;

+    const isActiveExpireTimer = (value: number): boolean => {
+      if (!expireTimer) {
+        return value === 0;
+      }
+
+      // Custom time...
+      if (value === -1) {
+        return !expirationTimer.DEFAULT_DURATIONS_SET.has(expireTimer);
+      }
+      return value === expireTimer;
+    };
+
+    const expireDurations: ReadonlyArray<ReactNode> = [
+      ...expirationTimer.DEFAULT_DURATIONS_IN_SECONDS,
+      -1,
+    ].map((seconds: number) => {
+      let text: string;
+
+      if (seconds === -1) {
+        text = i18n('customDisappearingTimeOption');
+      } else {
+        text = expirationTimer.format(i18n, seconds, {
+          capitalizeOff: true,
+        });
+      }
+
+      const onDurationClick = () => {
+        if (seconds === -1) {
+          this.setState({
+            modalState: ModalState.CustomDisappearingTimeout,
+          });
+        } else {
+          onSetDisappearingMessages(seconds);
+        }
+      };
+
+      return (
+        <MenuItem key={seconds} onClick={onDurationClick}>
+          <div
+            className={classNames(
+              TIMER_ITEM_CLASS,
+              isActiveExpireTimer(seconds) && `${TIMER_ITEM_CLASS}--active`
+            )}
+          >
+            {text}
+          </div>
+        </MenuItem>
+      );
+    });
+
    return (
      <ContextMenu id={triggerId}>
        {disableTimerChanges ? null : (
-          <SubMenu title={disappearingTitle}>
-            {expirationTimer.DEFAULT_DURATIONS_IN_SECONDS.map(
-              (seconds: number) => (
-                <MenuItem
-                  key={seconds}
-                  onClick={() => {
-                    onSetDisappearingMessages(seconds);
-                  }}
-                >
-                  {expirationTimer.format(i18n, seconds)}
-                </MenuItem>
-              )
-            )}
-          </SubMenu>
+          <SubMenu title={disappearingTitle}>{expireDurations}</SubMenu>
        )}
        <SubMenu title={muteTitle}>
          {muteOptions.map(item => (
@ -578,36 +625,64 @@ export class ConversationHeader extends React.Component<PropsType, StateType> {
  }

  public render(): ReactNode {
-    const { id, isSMSOnly } = this.props;
-    const { isNarrow } = this.state;
+    const {
+      id,
+      isSMSOnly,
+      i18n,
+      onSetDisappearingMessages,
+      expireTimer,
+    } = this.props;
+    const { isNarrow, modalState } = this.state;
    const triggerId = `conversation-${id}`;

+    let modalNode: ReactNode;
+    if (modalState === ModalState.NothingOpen) {
+      modalNode = undefined;
+    } else if (modalState === ModalState.CustomDisappearingTimeout) {
+      modalNode = (
+        <DisappearingTimeDialog
+          i18n={i18n}
+          initialValue={expireTimer}
+          onSubmit={value => {
+            this.setState({ modalState: ModalState.NothingOpen });
+            onSetDisappearingMessages(value);
+          }}
+          onClose={() => this.setState({ modalState: ModalState.NothingOpen })}
+        />
+      );
+    } else {
+      throw missingCaseError(modalState);
+    }
+
    return (
-      <Measure
-        bounds
-        onResize={({ bounds }) => {
-          if (!bounds || !bounds.width) {
-            return;
-          }
-          this.setState({ isNarrow: bounds.width < 500 });
-        }}
-      >
-        {({ measureRef }) => (
-          <div
-            className={classNames('module-ConversationHeader', {
-              'module-ConversationHeader--narrow': isNarrow,
-            })}
-            ref={measureRef}
-          >
-            {this.renderBackButton()}
-            {this.renderHeader()}
-            {!isSMSOnly && this.renderOutgoingCallButtons()}
-            {this.renderSearchButton()}
-            {this.renderMoreButton(triggerId)}
-            {this.renderMenu(triggerId)}
-          </div>
-        )}
-      </Measure>
+      <>
+        {modalNode}
+        <Measure
+          bounds
+          onResize={({ bounds }) => {
+            if (!bounds || !bounds.width) {
+              return;
+            }
+            this.setState({ isNarrow: bounds.width < 500 });
+          }}
+        >
+          {({ measureRef }) => (
+            <div
+              className={classNames('module-ConversationHeader', {
+                'module-ConversationHeader--narrow': isNarrow,
+              })}
+              ref={measureRef}
+            >
+              {this.renderBackButton()}
+              {this.renderHeader()}
+              {!isSMSOnly && this.renderOutgoingCallButtons()}
+              {this.renderSearchButton()}
+              {this.renderMoreButton(triggerId)}
+              {this.renderMenu(triggerId)}
+            </div>
+          )}
+        </Measure>
+      </>
    );
  }
 }
--- a/ts/components/conversation/DisappearingTimeDialog.stories.tsx
+++ b/ts/components/conversation/DisappearingTimeDialog.stories.tsx
@ -0,0 +1,29 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React from 'react';
+import { action } from '@storybook/addon-actions';
+import { storiesOf } from '@storybook/react';
+
+import { DisappearingTimeDialog } from './DisappearingTimeDialog';
+import { setup as setupI18n } from '../../../js/modules/i18n';
+import enMessages from '../../../_locales/en/messages.json';
+
+import { EXPIRE_TIMERS } from '../../test-both/util/expireTimers';
+
+const story = storiesOf('Components/DisappearingTimeDialog', module);
+
+const i18n = setupI18n('en', enMessages);
+
+EXPIRE_TIMERS.forEach(({ value, label }) => {
+  story.add(`Initial value: ${label}`, () => {
+    return (
+      <DisappearingTimeDialog
+        i18n={i18n}
+        initialValue={value}
+        onSubmit={action('onSubmit')}
+        onClose={action('onClose')}
+      />
+    );
+  });
+});
--- a/ts/components/conversation/DisappearingTimeDialog.tsx
+++ b/ts/components/conversation/DisappearingTimeDialog.tsx
@ -0,0 +1,124 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+/* eslint-disable no-restricted-syntax */
+
+import React, { useState } from 'react';
+
+import { ConfirmationDialog } from '../ConfirmationDialog';
+import { Select } from '../Select';
+import { LocalizerType } from '../../types/Util';
+import { Theme } from '../../util/theme';
+
+const CSS_MODULE = 'module-disappearing-time-dialog';
+
+const DEFAULT_VALUE = 60;
+
+export type PropsType = Readonly<{
+  i18n: LocalizerType;
+  theme?: Theme;
+  initialValue?: number;
+  onSubmit: (value: number) => void;
+  onClose: () => void;
+}>;
+
+const UNITS = ['seconds', 'minutes', 'hours', 'days', 'weeks'];
+
+const UNIT_TO_MS = new Map<string, number>([
+  ['seconds', 1],
+  ['minutes', 60],
+  ['hours', 60 * 60],
+  ['days', 24 * 60 * 60],
+  ['weeks', 7 * 24 * 60 * 60],
+]);
+
+const RANGES = new Map<string, [number, number]>([
+  ['seconds', [1, 60]],
+  ['minutes', [1, 60]],
+  ['hours', [1, 24]],
+  ['days', [1, 7]],
+  ['weeks', [1, 5]],
+]);
+
+export function DisappearingTimeDialog(props: PropsType): JSX.Element {
+  const {
+    i18n,
+    theme,
+    initialValue = DEFAULT_VALUE,
+    onSubmit,
+    onClose,
+  } = props;
+
+  let initialUnit = 'seconds';
+  let initialUnitValue = 1;
+  for (const unit of UNITS) {
+    const ms = UNIT_TO_MS.get(unit) || 1;
+
+    if (initialValue < ms) {
+      break;
+    }
+
+    initialUnit = unit;
+    initialUnitValue = Math.floor(initialValue / ms);
+  }
+
+  const [unitValue, setUnitValue] = useState(initialUnitValue);
+  const [unit, setUnit] = useState(initialUnit);
+
+  const range = RANGES.get(unit) || [1, 1];
+
+  const values: Array<number> = [];
+  for (let i = range[0]; i < range[1]; i += 1) {
+    values.push(i);
+  }
+
+  return (
+    <ConfirmationDialog
+      moduleClassName={CSS_MODULE}
+      i18n={i18n}
+      theme={theme}
+      onClose={onClose}
+      title={i18n('DisappearingTimeDialog__title')}
+      hasXButton
+      actions={[
+        {
+          text: i18n('DisappearingTimeDialog__set'),
+          style: 'affirmative',
+          action() {
+            onSubmit(unitValue * (UNIT_TO_MS.get(unit) || 1));
+          },
+        },
+      ]}
+    >
+      <p>{i18n('DisappearingTimeDialog__body')}</p>
+      <section className={`${CSS_MODULE}__time-boxes`}>
+        <Select
+          moduleClassName={`${CSS_MODULE}__time-boxes__value`}
+          value={unitValue}
+          onChange={newValue => setUnitValue(parseInt(newValue, 10))}
+          options={values.map(value => ({ value, text: value.toString() }))}
+        />
+        <Select
+          moduleClassName={`${CSS_MODULE}__time-boxes__units`}
+          value={unit}
+          onChange={newUnit => {
+            setUnit(newUnit);
+
+            const ranges = RANGES.get(newUnit);
+            if (!ranges) {
+              return;
+            }
+
+            const [min, max] = ranges;
+            setUnitValue(Math.max(min, Math.min(max - 1, unitValue)));
+          }}
+          options={UNITS.map(unitName => {
+            return {
+              value: unitName,
+              text: i18n(`DisappearingTimeDialog__${unitName}`),
+            };
+          })}
+        />
+      </section>
+    </ConfirmationDialog>
+  );
+}
--- a/ts/components/conversation/Timeline.stories.tsx
+++ b/ts/components/conversation/Timeline.stories.tsx
@ -298,6 +298,9 @@ const renderItem = (id: string) => (
    conversationId=""
    conversationAccepted
    renderContact={() => '*ContactName*'}
+    renderUniversalTimerNotification={() => (
+      <div>*UniversalTimerNotification*</div>
+    )}
    renderAudioAttachment={() => <div>*AudioAttachment*</div>}
    {...actions()}
  />
--- a/ts/components/conversation/TimelineItem.stories.tsx
+++ b/ts/components/conversation/TimelineItem.stories.tsx
@ -10,6 +10,7 @@ import { EmojiPicker } from '../emoji/EmojiPicker';
 import { setup as setupI18n } from '../../../js/modules/i18n';
 import enMessages from '../../../_locales/en/messages.json';
 import { PropsType as TimelineItemProps, TimelineItem } from './TimelineItem';
+import { UniversalTimerNotification } from './UniversalTimerNotification';
 import { CallMode } from '../../types/Calling';
 import { getDefaultConversation } from '../../test-both/helpers/getDefaultConversation';

@ -34,6 +35,10 @@ const renderContact = (conversationId: string) => (
  <React.Fragment key={conversationId}>{conversationId}</React.Fragment>
 );

+const renderUniversalTimerNotification = () => (
+  <UniversalTimerNotification i18n={i18n} expireTimer={3600} />
+);
+
 const getDefaultProps = () => ({
  conversationId: 'conversation-id',
  conversationAccepted: true,
@ -73,6 +78,7 @@ const getDefaultProps = () => ({
  returnToActiveCall: action('returnToActiveCall'),

  renderContact,
+  renderUniversalTimerNotification,
  renderEmojiPicker,
  renderAudioAttachment: () => <div>*AudioAttachment*</div>,
 });
@ -115,6 +121,10 @@ storiesOf('Components/Conversation/TimelineItem', module)
          sender: getDefaultConversation(),
        },
      },
+      {
+        type: 'universalTimerNotification',
+        data: null,
+      },
      {
        type: 'callHistory',
        data: {
--- a/ts/components/conversation/TimelineItem.tsx
+++ b/ts/components/conversation/TimelineItem.tsx
@ -90,6 +90,10 @@ type TimerNotificationType = {
  type: 'timerNotification';
  data: TimerNotificationProps;
 };
+type UniversalTimerNotificationType = {
+  type: 'universalTimerNotification';
+  data: null;
+};
 type SafetyNumberNotificationType = {
  type: 'safetyNumberNotification';
  data: SafetyNumberNotificationProps;
@ -132,6 +136,7 @@ export type TimelineItemType =
  | ResetSessionNotificationType
  | SafetyNumberNotificationType
  | TimerNotificationType
+  | UniversalTimerNotificationType
  | UnsupportedMessageType
  | VerificationNotificationType;

@ -143,6 +148,7 @@ type PropsLocalType = {
  isSelected: boolean;
  selectMessage: (messageId: string, conversationId: string) => unknown;
  renderContact: SmartContactRendererType;
+  renderUniversalTimerNotification: () => JSX.Element;
  i18n: LocalizerType;
  interactionMode: InteractionModeType;
  theme?: ThemeType;
@ -169,6 +175,7 @@ export class TimelineItem extends React.PureComponent<PropsType> {
      theme,
      messageSizeChanged,
      renderContact,
+      renderUniversalTimerNotification,
      returnToActiveCall,
      selectMessage,
      startCallingLobby,
@ -225,6 +232,8 @@ export class TimelineItem extends React.PureComponent<PropsType> {
      notification = (
        <TimerNotification {...this.props} {...item.data} i18n={i18n} />
      );
+    } else if (item.type === 'universalTimerNotification') {
+      notification = renderUniversalTimerNotification();
    } else if (item.type === 'safetyNumberNotification') {
      notification = (
        <SafetyNumberNotification {...this.props} {...item.data} i18n={i18n} />
--- a/ts/components/conversation/UniversalTimerNotification.stories.tsx
+++ b/ts/components/conversation/UniversalTimerNotification.stories.tsx
@ -0,0 +1,21 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React from 'react';
+import { storiesOf } from '@storybook/react';
+
+import { UniversalTimerNotification } from './UniversalTimerNotification';
+import { setup as setupI18n } from '../../../js/modules/i18n';
+import enMessages from '../../../_locales/en/messages.json';
+
+import { EXPIRE_TIMERS } from '../../test-both/util/expireTimers';
+
+const story = storiesOf('Components/UniversalTimerNotification', module);
+
+const i18n = setupI18n('en', enMessages);
+
+EXPIRE_TIMERS.forEach(({ value, label }) => {
+  story.add(`Initial value: ${label}`, () => {
+    return <UniversalTimerNotification i18n={i18n} expireTimer={value} />;
+  });
+});
--- a/ts/components/conversation/UniversalTimerNotification.tsx
+++ b/ts/components/conversation/UniversalTimerNotification.tsx
@ -0,0 +1,28 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React from 'react';
+
+import { LocalizerType } from '../../types/Util';
+import * as expirationTimer from '../../util/expirationTimer';
+
+export type Props = {
+  i18n: LocalizerType;
+  expireTimer: number;
+};
+
+export const UniversalTimerNotification: React.FC<Props> = props => {
+  const { i18n, expireTimer } = props;
+
+  if (!expireTimer) {
+    return null;
+  }
+
+  return (
+    <div className="module-universal-timer-notification">
+      {i18n('UniversalTimerNotification__text', {
+        timeValue: expirationTimer.format(i18n, expireTimer),
+      })}
+    </div>
+  );
+};
--- a/ts/components/conversation/conversation-details/ConversationDetails.stories.tsx
+++ b/ts/components/conversation/conversation-details/ConversationDetails.stories.tsx
@ -29,13 +29,18 @@ const conversation: ConversationType = getDefaultConversation({
  conversationColor: 'ultramarine' as const,
 });

-const createProps = (hasGroupLink = false): Props => ({
+const createProps = (hasGroupLink = false, expireTimer?: number): Props => ({
  addMembers: async () => {
    action('addMembers');
  },
  canEditGroupInfo: false,
  candidateContactsToAdd: times(10, () => getDefaultConversation()),
-  conversation,
+  conversation: expireTimer
+    ? {
+        ...conversation,
+        expireTimer,
+      }
+    : conversation,
  hasGroupLink,
  i18n,
  isAdmin: false,
@ -122,6 +127,12 @@ story.add('Group Editable', () => {
  return <ConversationDetails {...props} canEditGroupInfo />;
 });

+story.add('Group Editable with custom disappearing timeout', () => {
+  const props = createProps(false, 3 * 24 * 60 * 60);
+
+  return <ConversationDetails {...props} canEditGroupInfo />;
+});
+
 story.add('Group Links On', () => {
  const props = createProps(true);

--- a/ts/components/conversation/conversation-details/ConversationDetails.tsx
+++ b/ts/components/conversation/conversation-details/ConversationDetails.tsx
@ -11,6 +11,10 @@ import { LocalizerType } from '../../../types/Util';
 import { MediaItemType } from '../../LightboxGallery';
 import { missingCaseError } from '../../../util/missingCaseError';

+import { Select } from '../../Select';
+
+import { DisappearingTimeDialog } from '../DisappearingTimeDialog';
+
 import { PanelRow } from './PanelRow';
 import { PanelSection } from './PanelSection';
 import { AddGroupMembersModal } from './AddGroupMembersModal';
@ -34,6 +38,7 @@ enum ModalState {
  NothingOpen,
  EditingGroupAttributes,
  AddingGroupMembers,
+  CustomDisappearingTimeout,
 }

 export type StateProps = {
@ -71,10 +76,6 @@ export type StateProps = {

 export type Props = StateProps;

-const expirationTimerDefaultSet = new Set<number>(
-  expirationTimer.DEFAULT_DURATIONS_IN_SECONDS
-);
-
 export const ConversationDetails: React.ComponentType<Props> = ({
  addMembers,
  canEditGroupInfo,
@ -111,8 +112,13 @@ export const ConversationDetails: React.ComponentType<Props> = ({
    setAddGroupMembersRequestState,
  ] = useState<RequestState>(RequestState.Inactive);

-  const updateExpireTimer = (event: React.ChangeEvent<HTMLSelectElement>) => {
-    setDisappearingMessages(parseInt(event.target.value, 10));
+  const updateExpireTimer = (value: string) => {
+    const intValue = parseInt(value, 10);
+    if (intValue === -1) {
+      setModalState(ModalState.CustomDisappearingTimeout);
+    } else {
+      setDisappearingMessages(intValue);
+    }
  };

  if (conversation === undefined) {
@ -204,16 +210,54 @@ export const ConversationDetails: React.ComponentType<Props> = ({
        />
      );
      break;
+    case ModalState.CustomDisappearingTimeout:
+      modalNode = (
+        <DisappearingTimeDialog
+          i18n={i18n}
+          initialValue={conversation.expireTimer}
+          onSubmit={value => {
+            setModalState(ModalState.NothingOpen);
+            setDisappearingMessages(value);
+          }}
+          onClose={() => setModalState(ModalState.NothingOpen)}
+        />
+      );
+      break;
    default:
      throw missingCaseError(modalState);
  }

-  const expireTimer = conversation.expireTimer || 0;
+  const expireTimer: number = conversation.expireTimer || 0;

-  let expirationTimerDurations = expirationTimer.DEFAULT_DURATIONS_IN_SECONDS;
-  if (!expirationTimerDefaultSet.has(expireTimer)) {
-    expirationTimerDurations = [...expirationTimerDurations, expireTimer];
-  }
+  let expirationTimerOptions: ReadonlyArray<{
+    readonly value: number;
+    readonly text: string;
+  }> = expirationTimer.DEFAULT_DURATIONS_IN_SECONDS.map(seconds => {
+    const text = expirationTimer.format(i18n, seconds, {
+      capitalizeOff: true,
+    });
+    return {
+      value: seconds,
+      text,
+    };
+  });
+
+  const isCustomTimeSelected = !expirationTimer.DEFAULT_DURATIONS_SET.has(
+    expireTimer
+  );
+
+  // Custom time...
+  expirationTimerOptions = [
+    ...expirationTimerOptions,
+    {
+      value: -1,
+      text: i18n(
+        isCustomTimeSelected
+          ? 'selectedCustomDisappearingTimeOption'
+          : 'customDisappearingTimeOption'
+      ),
+    },
+  ];

  return (
    <div className="conversation-details-panel">
@ -241,18 +285,16 @@ export const ConversationDetails: React.ComponentType<Props> = ({
            info={i18n('ConversationDetails--disappearing-messages-info')}
            label={i18n('ConversationDetails--disappearing-messages-label')}
            right={
-              <div className="module-conversation-details-select">
-                <select onChange={updateExpireTimer} value={expireTimer}>
-                  {expirationTimerDurations.map((seconds: number) => {
-                    const label = expirationTimer.format(i18n, seconds);
-                    return (
-                      <option value={seconds} key={seconds} aria-label={label}>
-                        {label}
-                      </option>
-                    );
-                  })}
-                </select>
-              </div>
+              <Select
+                onChange={updateExpireTimer}
+                value={isCustomTimeSelected ? -1 : expireTimer}
+                options={expirationTimerOptions}
+              />
+            }
+            rightInfo={
+              isCustomTimeSelected
+                ? expirationTimer.format(i18n, expireTimer)
+                : undefined
            }
          />
        ) : null}
--- a/ts/components/conversation/conversation-details/PanelRow.tsx
+++ b/ts/components/conversation/conversation-details/PanelRow.tsx
@ -13,6 +13,7 @@ export type Props = {
  label: string | React.ReactNode;
  info?: string;
  right?: string | React.ReactNode;
+  rightInfo?: string;
  actions?: React.ReactNode;
  onClick?: () => void;
 };
@ -27,6 +28,7 @@ export const PanelRow: React.ComponentType<Props> = ({
  label,
  info,
  right,
+  rightInfo,
  actions,
  onClick,
 }) => {
@ -37,7 +39,14 @@ export const PanelRow: React.ComponentType<Props> = ({
        <div>{label}</div>
        {info !== undefined ? <div className={bem('info')}>{info}</div> : null}
      </div>
-      {right !== undefined ? <div className={bem('right')}>{right}</div> : null}
+      {right !== undefined ? (
+        <div className={bem('right')}>
+          {right}
+          {rightInfo !== undefined ? (
+            <div className={bem('right-info')}>{rightInfo}</div>
+          ) : null}
+        </div>
+      ) : null}
      {actions !== undefined ? (
        <div className={alwaysShowActions ? '' : bem('actions')}>{actions}</div>
      ) : null}
--- a/ts/groups.ts
+++ b/ts/groups.ts
@ -47,6 +47,7 @@ import {
  getClientZkGroupCipher,
  getClientZkProfileOperations,
 } from './util/zkgroup';
+import * as universalExpireTimer from './util/universalExpireTimer';
 import {
  arrayBufferToBase64,
  arrayBufferToHex,
@ -1675,6 +1676,11 @@ export async function createGroupV2({
  window.MessageController.register(model.id, model);
  conversation.trigger('newmessage', model);

+  const expireTimer = universalExpireTimer.get();
+  if (expireTimer) {
+    await conversation.updateExpirationTimer(expireTimer);
+  }
+
  return conversation;
 }

--- a/ts/model-types.d.ts
+++ b/ts/model-types.d.ts
@ -141,6 +141,7 @@ export type MessageAttributesType = {
    | 'outgoing'
    | 'profile-change'
    | 'timer-notification'
+    | 'universal-timer-notification'
    | 'verified-change';
  body: string;
  attachments: Array<WhatIsThis>;
@ -254,6 +255,7 @@ export type ConversationAttributesType = {
  profileName?: string;
  verified?: number;
  profileLastFetchedAt?: number;
+  pendingUniversalTimer?: string;

  // Group-only
  groupId?: string;
--- a/ts/models/conversations.ts
+++ b/ts/models/conversations.ts
@ -55,6 +55,7 @@ import { getConversationMembers } from '../util/getConversationMembers';
 import { sendReadReceiptsFor } from '../util/sendReadReceiptsFor';
 import { updateConversationsWithUuidLookup } from '../updateConversationsWithUuidLookup';
 import { filter, map, take } from '../util/iterables';
+import * as universalExpireTimer from '../util/universalExpireTimer';

 /* eslint-disable more/no-then */
 window.Whisper = window.Whisper || {};
@ -1069,10 +1070,15 @@ export class ConversationModel extends window.Backbone
      );
    }

-    // On successful fetch - mark contact as registered.
-    if (this.get('uuid')) {
-      this.setRegistered();
+    if (!this.get('uuid')) {
+      return;
    }
+
+    // On successful fetch - mark contact as registered.
+    this.setRegistered();
+
+    // If we couldn't apply universal timer before - try it again.
+    this.queueJob(() => this.maybeSetPendingUniversalTimer());
  }

  isValid(): boolean {
@ -2749,6 +2755,85 @@ export class ConversationModel extends window.Backbone
    }
  }

+  async addUniversalTimerNotification(): Promise<string> {
+    const now = Date.now();
+    const message = ({
+      conversationId: this.id,
+      type: 'universal-timer-notification',
+      sent_at: now,
+      received_at: window.Signal.Util.incrementMessageCounter(),
+      received_at_ms: now,
+      unread: 0,
+      // TODO: DESKTOP-722
+    } as unknown) as typeof window.Whisper.MessageAttributesType;
+
+    const id = await window.Signal.Data.saveMessage(message, {
+      Message: window.Whisper.Message,
+    });
+    const model = window.MessageController.register(
+      id,
+      new window.Whisper.Message({
+        ...message,
+        id,
+      })
+    );
+
+    this.trigger('newmessage', model);
+
+    return id;
+  }
+
+  async maybeSetPendingUniversalTimer(): Promise<void> {
+    if (!this.isPrivate()) {
+      return;
+    }
+
+    if (this.isSMSOnly()) {
+      return;
+    }
+
+    if (this.get('pendingUniversalTimer') || this.get('expireTimer')) {
+      return;
+    }
+
+    const activeAt = this.get('active_at');
+    if (activeAt) {
+      return;
+    }
+
+    const expireTimer = universalExpireTimer.get();
+    if (!expireTimer) {
+      return;
+    }
+
+    const notificationId = await this.addUniversalTimerNotification();
+    this.set('pendingUniversalTimer', notificationId);
+  }
+
+  async maybeApplyUniversalTimer(): Promise<void> {
+    const notificationId = this.get('pendingUniversalTimer');
+    if (!notificationId) {
+      return;
+    }
+
+    const message = window.MessageController.getById(notificationId);
+    if (message) {
+      message.cleanup();
+    }
+
+    if (this.get('expireTimer')) {
+      this.set('pendingUniversalTimer', undefined);
+      return;
+    }
+
+    const expireTimer = universalExpireTimer.get();
+    if (expireTimer) {
+      await this.updateExpirationTimer(expireTimer);
+    }
+
+    this.set('pendingUniversalTimer', undefined);
+  }
+
  async onReadMessage(
    message: MessageModel,
    readAt?: number
@ -3243,7 +3328,6 @@ export class ConversationModel extends window.Backbone
  ): Promise<WhatIsThis> {
    const timestamp = Date.now();
    const outgoingReaction = { ...reaction, ...target };
-    const expireTimer = this.get('expireTimer');

    const reactionModel = window.Whisper.Reactions.add({
      ...outgoingReaction,
@ -3269,6 +3353,10 @@ export class ConversationModel extends window.Backbone
        timestamp
      );

+      await this.maybeApplyUniversalTimer();
+
+      const expireTimer = this.get('expireTimer');
+
      const attributes = ({
        id: window.getGuid(),
        type: 'outgoing',
@ -3447,12 +3535,15 @@ export class ConversationModel extends window.Backbone

    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
    const destination = this.getSendTarget()!;
-    const expireTimer = this.get('expireTimer');
    const recipients = this.getRecipients();

    this.queueJob(async () => {
      const now = Date.now();

+      await this.maybeApplyUniversalTimer();
+
+      const expireTimer = this.get('expireTimer');
+
      window.log.info(
        'Sending message to conversation',
        this.idForLogging(),
@ -3655,6 +3746,8 @@ export class ConversationModel extends window.Backbone
      return;
    }

+    this.queueJob(() => this.maybeSetPendingUniversalTimer());
+
    const ourConversationId = window.ConversationController.getOurConversationId();
    if (!ourConversationId) {
      throw new Error('updateLastMessage: Failed to fetch ourConversationId');
@ -3915,8 +4008,8 @@ export class ConversationModel extends window.Backbone

  async updateExpirationTimer(
    providedExpireTimer: number | undefined,
-    providedSource: unknown,
-    receivedAt: number,
+    providedSource?: unknown,
+    receivedAt?: number,
    options: { fromSync?: unknown; fromGroupUpdate?: unknown } = {}
  ): Promise<boolean | null | MessageModel | void> {
    if (this.isGroupV2()) {
@ -3964,6 +4057,11 @@ export class ConversationModel extends window.Backbone
    const timestamp = (receivedAt || Date.now()) - 1;

    this.set({ expireTimer });
+
+    // This call actually removes universal timer notification and clears
+    // the pending flags.
+    await this.maybeApplyUniversalTimer();
+
    window.Signal.Data.updateConversation(this.attributes);

    const model = new window.Whisper.Message(({
@ -4677,6 +4775,7 @@ export class ConversationModel extends window.Backbone
      lastMessage: null,
      timestamp: null,
      active_at: null,
+      pendingUniversalTimer: undefined,
    });
    window.Signal.Data.updateConversation(this.attributes);

--- a/ts/models/messages.ts
+++ b/ts/models/messages.ts
@ -129,6 +129,10 @@ type MessageBubbleProps =
      type: 'profileChange';
      data: ProfileChangeNotificationPropsType;
    }
+  | {
+      type: 'universalTimerNotification';
+      data: null;
+    }
  | {
      type: 'chatSessionRefreshed';
      data: null;
@ -333,6 +337,7 @@ export class MessageModel extends window.Backbone.Model<MessageAttributesType> {
      !this.isKeyChange() &&
      !this.isMessageHistoryUnsynced() &&
      !this.isProfileChange() &&
+      !this.isUniversalTimerNotification() &&
      !this.isUnsupportedMessage() &&
      !this.isVerifiedChange()
    );
@ -406,6 +411,12 @@ export class MessageModel extends window.Backbone.Model<MessageAttributesType> {
        data: this.getPropsForProfileChange(),
      };
    }
+    if (this.isUniversalTimerNotification()) {
+      return {
+        type: 'universalTimerNotification',
+        data: null,
+      };
+    }
    if (this.isChatSessionRefreshed()) {
      return {
        type: 'chatSessionRefreshed',
@ -600,6 +611,10 @@ export class MessageModel extends window.Backbone.Model<MessageAttributesType> {
    return this.get('type') === 'profile-change';
  }

+  isUniversalTimerNotification(): boolean {
+    return this.get('type') === 'universal-timer-notification';
+  }
+
  // Props for each message type
  getPropsForUnsupportedMessage(): PropsForUnsupportedMessage {
    const requiredVersion = this.get('requiredProtocolVersion');
@ -1941,6 +1956,7 @@ export class MessageModel extends window.Backbone.Model<MessageAttributesType> {
    const isKeyChange = this.isKeyChange();
    const isMessageHistoryUnsynced = this.isMessageHistoryUnsynced();
    const isProfileChange = this.isProfileChange();
+    const isUniversalTimerNotification = this.isUniversalTimerNotification();

    // Note: not all of these message types go through message.handleDataMessage

@ -1967,7 +1983,8 @@ export class MessageModel extends window.Backbone.Model<MessageAttributesType> {
      // Locally-generated notifications
      isKeyChange ||
      isMessageHistoryUnsynced ||
-      isProfileChange;
+      isProfileChange ||
+      isUniversalTimerNotification;

    return !hasSomethingToDisplay;
  }
--- a/ts/services/storageRecordOps.ts
+++ b/ts/services/storageRecordOps.ts
@ -38,6 +38,10 @@ import {
  getSafeLongFromTimestamp,
  getTimestampFromLong,
 } from '../util/timestampLongUtils';
+import {
+  get as getUniversalExpireTimer,
+  set as setUniversalExpireTimer,
+} from '../util/universalExpireTimer';
 import { ourProfileKeyService } from './ourProfileKey';

 const { updateConversation } = dataInterface;
@ -182,6 +186,11 @@ export async function toAccountRecord(
    accountRecord.primarySendsSms = Boolean(primarySendsSms);
  }

+  const universalExpireTimer = getUniversalExpireTimer();
+  if (universalExpireTimer) {
+    accountRecord.universalExpireTimer = Number(universalExpireTimer);
+  }
+
  const PHONE_NUMBER_SHARING_MODE_ENUM =
    window.textsecure.protobuf.AccountRecord.PhoneNumberSharingMode;
  const phoneNumberSharingMode = parsePhoneNumberSharingMode(
@ -811,6 +820,7 @@ export async function mergeAccountRecord(
    sealedSenderIndicators,
    typingIndicators,
    primarySendsSms,
+    universalExpireTimer,
  } = accountRecord;

  window.storage.put('read-receipt-setting', readReceipts);
@ -831,6 +841,10 @@ export async function mergeAccountRecord(
    window.storage.put('primarySendsSms', primarySendsSms);
  }

+  if (typeof universalExpireTimer === 'number') {
+    setUniversalExpireTimer(universalExpireTimer);
+  }
+
  const PHONE_NUMBER_SHARING_MODE_ENUM =
    window.textsecure.protobuf.AccountRecord.PhoneNumberSharingMode;
  let phoneNumberSharingModeToStore: PhoneNumberSharingMode;
--- a/ts/sql/Server.ts
+++ b/ts/sql/Server.ts
@ -3713,7 +3713,8 @@ async function getLastConversationActivity({
            'verified-change',
            'message-history-unsynced',
            'keychange',
-            'group-v1-migration'
+            'group-v1-migration',
+            'universal-timer-notification'
          )
        ) AND
        (
@ -3763,7 +3764,8 @@ async function getLastConversationPreview({
            'profile-change',
            'verified-change',
            'message-history-unsynced',
-            'group-v1-migration'
+            'group-v1-migration',
+            'universal-timer-notification'
          )
        ) AND NOT
        (
--- a/ts/state/ducks/conversations.ts
+++ b/ts/state/ducks/conversations.ts
@ -171,6 +171,7 @@ export type MessageType = {
    | 'outgoing'
    | 'profile-change'
    | 'timer-notification'
+    | 'universal-timer-notification'
    | 'verified-change';
  quote?: { author?: string; authorUuid?: string };
  received_at: number;
--- a/ts/state/ducks/items.ts
+++ b/ts/state/ducks/items.ts
@ -12,6 +12,8 @@ import { CustomColorType } from '../../types/Colors';
 // State

 export type ItemsStateType = {
+  readonly universalExpireTimer?: number;
+
  readonly [key: string]: unknown;
  readonly customColors?: {
    readonly colors: Record<string, CustomColorType>;
--- a/ts/state/selectors/items.ts
+++ b/ts/state/selectors/items.ts
@ -3,6 +3,8 @@

 import { createSelector } from 'reselect';

+import { ITEM_NAME as UNIVERSAL_EXPIRE_TIMER_ITEM } from '../../util/universalExpireTimer';
+
 import { StateType } from '../reducer';
 import { ItemsStateType } from '../ducks/items';

@ -18,3 +20,8 @@ export const getPinnedConversationIds = createSelector(
  (state: ItemsStateType): Array<string> =>
    (state.pinnedConversationIds || []) as Array<string>
 );
+
+export const getUniversalExpireTimer = createSelector(
+  getItems,
+  (state: ItemsStateType): number => state[UNIVERSAL_EXPIRE_TIMER_ITEM] || 0
+);
--- a/ts/state/smart/TimelineItem.tsx
+++ b/ts/state/smart/TimelineItem.tsx
@ -17,6 +17,7 @@ import {
 } from '../selectors/conversations';

 import { SmartContactName } from './ContactName';
+import { SmartUniversalTimerNotification } from './UniversalTimerNotification';

 type ExternalProps = {
  id: string;
@ -33,6 +34,10 @@ function renderContact(conversationId: string): JSX.Element {
  return <FilteredSmartContactName conversationId={conversationId} />;
 }

+function renderUniversalTimerNotification(): JSX.Element {
+  return <SmartUniversalTimerNotification />;
+}
+
 const mapStateToProps = (state: StateType, props: ExternalProps) => {
  const { id, conversationId } = props;

@ -60,6 +65,7 @@ const mapStateToProps = (state: StateType, props: ExternalProps) => {
    customColor: conversation?.customColor,
    isSelected,
    renderContact,
+    renderUniversalTimerNotification,
    i18n: getIntl(state),
    interactionMode: getInteractionMode(state),
    theme: getTheme(state),
--- a/ts/state/smart/UniversalTimerNotification.tsx
+++ b/ts/state/smart/UniversalTimerNotification.tsx
@ -0,0 +1,23 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { connect } from 'react-redux';
+import { mapDispatchToProps } from '../actions';
+import { UniversalTimerNotification } from '../../components/conversation/UniversalTimerNotification';
+import { StateType } from '../reducer';
+import { getIntl } from '../selectors/user';
+import { getUniversalExpireTimer } from '../selectors/items';
+
+const mapStateToProps = (state: StateType) => {
+  return {
+    ...state.updates,
+    i18n: getIntl(state),
+    expireTimer: getUniversalExpireTimer(state),
+  };
+};
+
+const smart = connect(mapStateToProps, mapDispatchToProps);
+
+export const SmartUniversalTimerNotification = smart(
+  UniversalTimerNotification
+);
--- a/ts/test-both/util/expireTimers.ts
+++ b/ts/test-both/util/expireTimers.ts
@ -0,0 +1,18 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+export type TestExpireTimer = Readonly<{ value: number; label: string }>;
+
+const SECOND = 1;
+const MINUTE = 60 * SECOND;
+const HOUR = 60 * MINUTE;
+const DAY = 24 * HOUR;
+const WEEK = 7 * DAY;
+
+export const EXPIRE_TIMERS: ReadonlyArray<TestExpireTimer> = [
+  { value: 42 * SECOND, label: '42 seconds' },
+  { value: 5 * MINUTE, label: '5 minutes' },
+  { value: 1 * HOUR, label: '1 hour' },
+  { value: 6 * DAY, label: '6 days' },
+  { value: 3 * WEEK, label: '3 weeks' },
+];
--- a/ts/textsecure.d.ts
+++ b/ts/textsecure.d.ts
@ -1067,6 +1067,7 @@ export declare class AccountRecordClass {
  notDiscoverableByPhoneNumber?: boolean;
  pinnedConversations?: PinnedConversationClass[];
  noteToSelfMarkedUnread?: boolean;
+  universalExpireTimer?: number;
  primarySendsSms?: boolean;

  __unknownFields?: ArrayBuffer;
--- a/ts/util/expirationTimer.ts
+++ b/ts/util/expirationTimer.ts
@ -6,25 +6,33 @@ import humanizeDuration from 'humanize-duration';
 import { LocalizerType } from '../types/Util';

 const SECONDS_PER_WEEK = 604800;
-export const DEFAULT_DURATIONS_IN_SECONDS = [
+export const DEFAULT_DURATIONS_IN_SECONDS: ReadonlyArray<number> = [
  0,
-  5,
-  10,
-  30,
-  moment.duration(1, 'minute').asSeconds(),
-  moment.duration(5, 'minutes').asSeconds(),
-  moment.duration(30, 'minutes').asSeconds(),
-  moment.duration(1, 'hour').asSeconds(),
-  moment.duration(6, 'hours').asSeconds(),
-  moment.duration(12, 'hours').asSeconds(),
-  moment.duration(1, 'day').asSeconds(),
+  moment.duration(4, 'weeks').asSeconds(),
  moment.duration(1, 'week').asSeconds(),
+  moment.duration(1, 'day').asSeconds(),
+  moment.duration(8, 'hours').asSeconds(),
+  moment.duration(1, 'hour').asSeconds(),
+  moment.duration(5, 'minutes').asSeconds(),
+  moment.duration(30, 'seconds').asSeconds(),
 ];

-export function format(i18n: LocalizerType, dirtySeconds?: number): string {
+export const DEFAULT_DURATIONS_SET: ReadonlySet<number> = new Set<number>(
+  DEFAULT_DURATIONS_IN_SECONDS
+);
+
+export type FormatOptions = {
+  capitalizeOff?: boolean;
+};
+
+export function format(
+  i18n: LocalizerType,
+  dirtySeconds?: number,
+  { capitalizeOff = false }: FormatOptions = {}
+): string {
  let seconds = Math.abs(dirtySeconds || 0);
  if (!seconds) {
-    return i18n('disappearingMessages__off');
+    return i18n(capitalizeOff ? 'off' : 'disappearingMessages__off');
  }
  seconds = Math.max(Math.floor(seconds), 1);

--- a/ts/util/index.ts
+++ b/ts/util/index.ts
@ -37,6 +37,7 @@ import { StartupQueue } from './StartupQueue';
 import { postLinkExperience } from './postLinkExperience';
 import { sendToGroup, sendContentMessageToGroup } from './sendToGroup';
 import { RetryPlaceholders } from './retryPlaceholders';
+import * as expirationTimer from './expirationTimer';

 export {
  GoogleChrome,
@ -73,4 +74,5 @@ export {
  sleep,
  toWebSafeBase64,
  zkgroup,
+  expirationTimer,
 };
--- a/ts/util/lint/exceptions.json
+++ b/ts/util/lint/exceptions.json
@ -1233,6 +1233,22 @@
    "updated": "2021-05-11T20:38:03.542Z",
    "reasonDetail": "Protected from arbitrary input"
  },
+  {
+    "rule": "jQuery-$(",
+    "path": "js/views/settings_view.js",
+    "line": "    template: () => $('#disappearingMessagesSettings').html(),",
+    "reasonCategory": "usageTrusted",
+    "updated": "2021-05-27T01:33:06.541Z",
+    "reasonDetail": "Interacting with already-existing DOM nodes"
+  },
+  {
+    "rule": "jQuery-$(",
+    "path": "js/views/settings_view.js",
+    "line": "      this.$('.disappearing-messages-setting').append(",
+    "reasonCategory": "usageTrusted",
+    "updated": "2021-05-27T01:33:06.541Z",
+    "reasonDetail": "Interacting with already-existing DOM nodes"
+  },
  {
    "rule": "jQuery-append(",
    "path": "js/views/settings_view.js",
@ -1241,6 +1257,14 @@
    "updated": "2020-08-21T11:29:29.636Z",
    "reasonDetail": "Interacting with already-existing DOM nodes"
  },
+  {
+    "rule": "jQuery-append(",
+    "path": "js/views/settings_view.js",
+    "line": "      this.$('.disappearing-messages-setting').append(",
+    "reasonCategory": "usageTrusted",
+    "updated": "2021-05-27T01:33:06.541Z",
+    "reasonDetail": "Interacting with already-existing DOM nodes"
+  },
  {
    "rule": "jQuery-html(",
    "path": "js/views/settings_view.js",
@ -1257,6 +1281,14 @@
    "updated": "2021-02-26T18:44:56.450Z",
    "reasonDetail": "Static selector, read-only access"
  },
+  {
+    "rule": "jQuery-html(",
+    "path": "js/views/settings_view.js",
+    "line": "    template: () => $('#disappearingMessagesSettings').html(),",
+    "reasonCategory": "usageTrusted",
+    "updated": "2021-05-27T01:33:06.541Z",
+    "reasonDetail": "Interacting with already-existing DOM nodes"
+  },
  {
    "rule": "jQuery-$(",
    "path": "js/views/standalone_registration_view.js",
--- a/ts/util/universalExpireTimer.ts
+++ b/ts/util/universalExpireTimer.ts
@ -0,0 +1,12 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+export const ITEM_NAME = 'universalExpireTimer';
+
+export function get(): number {
+  return window.storage.get(ITEM_NAME) || 0;
+}
+
+export function set(newValue: number | undefined): Promise<void> {
+  return window.storage.put(ITEM_NAME, newValue || 0);
+}
--- a/ts/views/conversation_view.ts
+++ b/ts/views/conversation_view.ts
@ -1068,7 +1068,7 @@ Whisper.ConversationView = Whisper.View.extend({

    const finish = () => {
      resolvePromise();
-      this.model.inProgressFinish = null;
+      this.model.inProgressFetch = null;
    };

    return finish;
--- a/ts/window.d.ts
+++ b/ts/window.d.ts
@ -102,6 +102,7 @@ import { MessageDetail } from './components/conversation/MessageDetail';
 import { ProgressModal } from './components/ProgressModal';
 import { Quote } from './components/conversation/Quote';
 import { StagedLinkPreview } from './components/conversation/StagedLinkPreview';
+import { DisappearingTimeDialog } from './components/conversation/DisappearingTimeDialog';
 import { MIMEType } from './types/MIME';
 import { ElectronLocaleType } from './util/mapToSupportLocale';
 import { SignalProtocolStore } from './SignalProtocolStore';
@ -488,6 +489,7 @@ declare global {
        ProgressModal: typeof ProgressModal;
        Quote: typeof Quote;
        StagedLinkPreview: typeof StagedLinkPreview;
+        DisappearingTimeDialog: typeof DisappearingTimeDialog;
      };
      OS: typeof OS;
      Workflow: {
@ -796,4 +798,5 @@ export type WhisperType = {
  View: typeof Backbone.View & {
    Templates: Record<string, string>;
  };
+  DisappearingTimeDialog: typeof window.Whisper.View | undefined;
 };