PLT-5699 Improvements to channel switcher (#6486)

* Refactor channel switcher to not wait on server results

* Change channel switcher to quick switcher and include team switching

* Add sections, update ordering and add discoverability button

* Fix styling error

* Use CMD in text if on mac

* Clean yarn cache on every install

* Various UX updates per feedback

* Add shortcut help text for team switcher

* Couple more updates per feedback

* Some minor fixes for GM and autocomplete race

* Updating UI for channel switcher (#6504)

* Updating channel switcher button (#6506)

* Updating switcher modal on mobile (#6507)

* Removed jQuery usage

* Rename function to toggleQuickSwitchModal

5 files changed, 371 insertions, 95 deletions

diff --git a/webapp/components/suggestion/provider.jsx b/webapp/components/suggestion/provider.jsx
index 39bb135a8..a5b54fb26 100644
--- a/webapp/components/suggestion/provider.jsx
+++ b/webapp/components/suggestion/provider.jsx
@@ -7,6 +7,7 @@ export default class Provider {
     constructor() {
         this.latestPrefix = '';
         this.latestComplete = true;
+        this.disableDispatches = false;
     }
 
     handlePretextChanged(suggestionId, pretext) { // eslint-disable-line no-unused-vars
@@ -22,6 +23,10 @@ export default class Provider {
     }
 
     shouldCancelDispatch(prefix) {
+        if (this.disableDispatches) {
+            return true;
+        }
+
         if (prefix === this.latestPrefix) {
             this.latestComplete = true;
         } else if (this.latestComplete) {
diff --git a/webapp/components/suggestion/suggestion_box.jsx b/webapp/components/suggestion/suggestion_box.jsx
index 1915b22b7..e1de927b9 100644
--- a/webapp/components/suggestion/suggestion_box.jsx
+++ b/webapp/components/suggestion/suggestion_box.jsx
@@ -15,6 +15,71 @@ import PropTypes from 'prop-types';
 import React from 'react';
 
 export default class SuggestionBox extends React.Component {
+    static propTypes = {
+
+        /**
+         * The list component to render, usually SuggestionList
+         */
+        listComponent: PropTypes.func.isRequired,
+
+        /**
+         * The HTML input box type
+         */
+        type: PropTypes.oneOf(['input', 'textarea', 'search']).isRequired,
+
+        /**
+         * The value of in the input
+         */
+        value: PropTypes.string.isRequired,
+
+        /**
+         * Array of suggestion providers
+         */
+        providers: PropTypes.arrayOf(PropTypes.object),
+
+        /**
+         * Where the list will be displayed relative to the input box, defaults to 'top'
+         */
+        listStyle: PropTypes.string,
+
+        /**
+         * Set to true to draw dividers between types of list items, defaults to false
+         */
+        renderDividers: PropTypes.bool,
+
+        /**
+         * Set to allow TAB to select an item in the list, defaults to true
+         */
+        completeOnTab: PropTypes.bool,
+
+        /**
+         * Function called when input box loses focus
+         */
+        onBlur: PropTypes.func,
+
+        /**
+         * Function called when input box value changes
+         */
+        onChange: PropTypes.func,
+
+        /**
+         * Function called when a key is pressed and the input box is in focus
+         */
+        onKeyDown: PropTypes.func,
+
+        /**
+         * Function called when an item is selected
+         */
+        onItemSelected: PropTypes.func
+    }
+
+    static defaultProps = {
+        type: 'input',
+        listStyle: 'top',
+        renderDividers: false,
+        completeOnTab: true
+    }
+
     constructor(props) {
         super(props);
 
@@ -46,6 +111,14 @@ export default class SuggestionBox extends React.Component {
         SuggestionStore.unregisterSuggestionBox(this.suggestionId);
     }
 
+    componentDidUpdate(prevProps) {
+        if (this.props.providers !== prevProps.providers) {
+            const textbox = this.getTextbox();
+            const pretext = textbox.value.substring(0, textbox.selectionEnd);
+            GlobalActions.emitSuggestionPretextChanged(this.suggestionId, pretext);
+        }
+    }
+
     getTextbox() {
         if (this.props.type === 'textarea') {
             return this.refs.textbox.getDOMNode();
@@ -171,7 +244,7 @@ export default class SuggestionBox extends React.Component {
             } else if (e.which === KeyCodes.DOWN) {
                 GlobalActions.emitSelectNextSuggestion(this.suggestionId);
                 e.preventDefault();
-            } else if (e.which === KeyCodes.ENTER || e.which === KeyCodes.TAB) {
+            } else if (e.which === KeyCodes.ENTER || (this.props.completeOnTab && e.which === KeyCodes.TAB)) {
                 this.handleCompleteWord(SuggestionStore.getSelection(this.suggestionId), SuggestionStore.getSelectedMatchedPretext(this.suggestionId));
                 this.props.onKeyDown(e);
                 e.preventDefault();
@@ -281,23 +354,3 @@ export default class SuggestionBox extends React.Component {
         return '';
     }
 }
-
-SuggestionBox.defaultProps = {
-    type: 'input',
-    listStyle: 'top'
-};
-
-SuggestionBox.propTypes = {
-    listComponent: PropTypes.func.isRequired,
-    type: PropTypes.oneOf(['input', 'textarea', 'search']).isRequired,
-    value: PropTypes.string.isRequired,
-    providers: PropTypes.arrayOf(PropTypes.object),
-    listStyle: PropTypes.string,
-    renderDividers: PropTypes.bool,
-
-    // explicitly name any input event handlers we override and need to manually call
-    onBlur: PropTypes.func,
-    onChange: PropTypes.func,
-    onKeyDown: PropTypes.func,
-    onItemSelected: PropTypes.func
-};
diff --git a/webapp/components/suggestion/suggestion_list.jsx b/webapp/components/suggestion/suggestion_list.jsx
index 59f0d02f8..64e8713c5 100644
--- a/webapp/components/suggestion/suggestion_list.jsx
+++ b/webapp/components/suggestion/suggestion_list.jsx
@@ -1,14 +1,14 @@
 // Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
 // See License.txt for license information.
 
+import SuggestionStore from 'stores/suggestion_store.jsx';
+
 import $ from 'jquery';
-import PropTypes from 'prop-types';
 import React from 'react';
 import ReactDOM from 'react-dom';
+import PropTypes from 'prop-types';
 import {FormattedMessage} from 'react-intl';
 
-import SuggestionStore from 'stores/suggestion_store.jsx';
-
 export default class SuggestionList extends React.Component {
     static propTypes = {
         suggestionId: PropTypes.string.isRequired,
@@ -111,6 +111,17 @@ export default class SuggestionList extends React.Component {
         );
     }
 
+    renderLoading(type) {
+        return (
+            <div
+                key={type + '-loading'}
+                className='suggestion-loader'
+            >
+                <i className='fa fa-spinner fa-pulse fa-fw margin-bottom'/>
+            </div>
+        );
+    }
+
     render() {
         if (this.state.items.length === 0) {
             return null;
@@ -131,6 +142,11 @@ export default class SuggestionList extends React.Component {
                 lastType = item.type;
             }
 
+            if (item.loading) {
+                items.push(this.renderLoading(item.type));
+                continue;
+            }
+
             items.push(
                 <Component
                     key={term}
diff --git a/webapp/components/suggestion/switch_channel_provider.jsx b/webapp/components/suggestion/switch_channel_provider.jsx
index 89af74c6d..9790de38e 100644
--- a/webapp/components/suggestion/switch_channel_provider.jsx
+++ b/webapp/components/suggestion/switch_channel_provider.jsx
@@ -4,10 +4,6 @@
 import Suggestion from './suggestion.jsx';
 import Provider from './provider.jsx';
 
-import ChannelStore from 'stores/channel_store.jsx';
-import UserStore from 'stores/user_store.jsx';
-
-import {autocompleteUsers} from 'actions/user_actions.jsx';
 import Client from 'client/web_client.jsx';
 import AppDispatcher from 'dispatcher/app_dispatcher.jsx';
 import {Constants, ActionTypes} from 'utils/constants.jsx';
@@ -16,30 +12,44 @@ import {sortChannelsByDisplayName, getChannelDisplayName} from 'utils/channel_ut
 
 import React from 'react';
 
+import store from 'stores/redux_store.jsx';
+const getState = store.getState;
+const dispatch = store.dispatch;
+
+import {searchChannels} from 'mattermost-redux/actions/channels';
+import {autocompleteUsers} from 'mattermost-redux/actions/users';
+
+import {getCurrentUserId, searchProfiles} from 'mattermost-redux/selectors/entities/users';
+import {getChannelsInCurrentTeam, getMyChannelMemberships, getGroupChannels} from 'mattermost-redux/selectors/entities/channels';
+import {getCurrentTeamId} from 'mattermost-redux/selectors/entities/teams';
+import {getBool} from 'mattermost-redux/selectors/entities/preferences';
+import {Preferences} from 'mattermost-redux/constants';
+
 class SwitchChannelSuggestion extends Suggestion {
     render() {
         const {item, isSelection} = this.props;
+        const channel = item.channel;
 
         let className = 'mentions__name';
         if (isSelection) {
             className += ' suggestion--selected';
         }
 
-        let displayName = item.display_name;
+        let displayName = channel.display_name;
         let icon = null;
-        if (item.type === Constants.OPEN_CHANNEL) {
+        if (channel.type === Constants.OPEN_CHANNEL) {
             icon = <div className='status'><i className='fa fa-globe'/></div>;
-        } else if (item.type === Constants.PRIVATE_CHANNEL) {
+        } else if (channel.type === Constants.PRIVATE_CHANNEL) {
             icon = <div className='status'><i className='fa fa-lock'/></div>;
-        } else if (item.type === Constants.GM_CHANNEL) {
-            displayName = getChannelDisplayName(item);
+        } else if (channel.type === Constants.GM_CHANNEL) {
+            displayName = getChannelDisplayName(channel);
             icon = <div className='status status--group'>{'G'}</div>;
         } else {
             icon = (
                 <div className='pull-left'>
                     <img
                         className='mention__image'
-                        src={Client.getUsersRoute() + '/' + item.id + '/image?time=' + item.last_picture_update}
+                        src={Client.getUsersRoute() + '/' + channel.id + '/image?time=' + channel.last_picture_update}
                     />
                 </div>
             );
@@ -57,83 +67,179 @@ class SwitchChannelSuggestion extends Suggestion {
     }
 }
 
+let prefix = '';
+
+function quickSwitchSorter(wrappedA, wrappedB) {
+    if (wrappedA.type === Constants.MENTION_CHANNELS && wrappedB.type === Constants.MENTION_MORE_CHANNELS) {
+        return -1;
+    } else if (wrappedB.type === Constants.MENTION_CHANNELS && wrappedA.type === Constants.MENTION_MORE_CHANNELS) {
+        return 1;
+    }
+
+    const a = wrappedA.channel;
+    const b = wrappedB.channel;
+
+    let aDisplayName = getChannelDisplayName(a).toLowerCase();
+    let bDisplayName = getChannelDisplayName(b).toLowerCase();
+
+    if (a.type === Constants.DM_CHANNEL) {
+        aDisplayName = aDisplayName.substring(1);
+    }
+
+    if (b.type === Constants.DM_CHANNEL) {
+        bDisplayName = bDisplayName.substring(1);
+    }
+
+    const aStartsWith = aDisplayName.startsWith(prefix);
+    const bStartsWith = bDisplayName.startsWith(prefix);
+    if (aStartsWith && bStartsWith) {
+        return sortChannelsByDisplayName(a, b);
+    } else if (!aStartsWith && !bStartsWith) {
+        return sortChannelsByDisplayName(a, b);
+    } else if (aStartsWith) {
+        return -1;
+    }
+
+    return 1;
+}
+
 export default class SwitchChannelProvider extends Provider {
     handlePretextChanged(suggestionId, channelPrefix) {
         if (channelPrefix) {
+            prefix = channelPrefix;
             this.startNewRequest(suggestionId, channelPrefix);
 
-            const allChannels = ChannelStore.getAll();
-            const channels = [];
+            // Dispatch suggestions for local data
+            const channels = getChannelsInCurrentTeam(getState()).concat(getGroupChannels(getState()));
+            const users = Object.assign([], searchProfiles(getState(), channelPrefix, true), true);
+            this.formatChannelsAndDispatch(channelPrefix, suggestionId, channels, users, true);
 
-            autocompleteUsers(
-                channelPrefix,
-                (data) => {
-                    const users = Object.assign([], data.users);
+            // Fetch data from the server and dispatch
+            this.fetchUsersAndChannels(channelPrefix, suggestionId);
 
-                    if (this.shouldCancelDispatch(channelPrefix)) {
-                        return;
-                    }
+            return true;
+        }
 
-                    const currentId = UserStore.getCurrentId();
+        return false;
+    }
 
-                    for (const id of Object.keys(allChannels)) {
-                        const channel = allChannels[id];
-                        if (channel.display_name.toLowerCase().indexOf(channelPrefix.toLowerCase()) !== -1) {
-                            const newChannel = Object.assign({}, channel);
-                            if (newChannel.type === Constants.GM_CHANNEL) {
-                                newChannel.name = getChannelDisplayName(newChannel);
-                            }
-                            channels.push(newChannel);
-                        }
-                    }
+    async fetchUsersAndChannels(channelPrefix, suggestionId) {
+        const usersAsync = autocompleteUsers(channelPrefix)(dispatch, getState);
+        const channelsAsync = searchChannels(getCurrentTeamId(getState()), channelPrefix)(dispatch, getState);
+        await usersAsync;
+        await channelsAsync;
 
-                    const userMap = {};
-                    for (let i = 0; i < users.length; i++) {
-                        const user = users[i];
-                        let displayName = `@${user.username} `;
+        if (this.shouldCancelDispatch(channelPrefix)) {
+            return;
+        }
 
-                        if (user.id === currentId) {
-                            continue;
-                        }
+        const users = Object.assign([], searchProfiles(getState(), channelPrefix, true));
+        const channels = getChannelsInCurrentTeam(getState()).concat(getGroupChannels(getState()));
+        this.formatChannelsAndDispatch(channelPrefix, suggestionId, channels, users);
+    }
 
-                        if ((user.first_name || user.last_name) && user.nickname) {
-                            displayName += `- ${Utils.getFullName(user)} (${user.nickname})`;
-                        } else if (user.nickname) {
-                            displayName += `- (${user.nickname})`;
-                        } else if (user.first_name || user.last_name) {
-                            displayName += `- ${Utils.getFullName(user)}`;
-                        }
+    formatChannelsAndDispatch(channelPrefix, suggestionId, allChannels, users, skipNotInChannel = false) {
+        const channels = [];
+        const members = getMyChannelMemberships(getState());
+
+        if (this.shouldCancelDispatch(channelPrefix)) {
+            return;
+        }
 
-                        const newChannel = {
-                            display_name: displayName,
-                            name: user.username,
-                            id: user.id,
-                            update_at: user.update_at,
-                            type: Constants.DM_CHANNEL
-                        };
-                        channels.push(newChannel);
-                        userMap[user.id] = user;
+        const currentId = getCurrentUserId(getState());
+
+        for (const id of Object.keys(allChannels)) {
+            const channel = allChannels[id];
+            const member = members[channel.id];
+
+            if (channel.display_name.toLowerCase().indexOf(channelPrefix.toLowerCase()) !== -1) {
+                const newChannel = Object.assign({}, channel);
+                const wrappedChannel = {channel: newChannel, name: newChannel.name};
+                if (newChannel.type === Constants.GM_CHANNEL) {
+                    newChannel.name = getChannelDisplayName(newChannel);
+                    wrappedChannel.name = newChannel.name;
+                    const isGMVisible = getBool(getState(), Preferences.CATEGORY_GROUP_CHANNEL_SHOW, newChannel.id, false);
+                    if (isGMVisible) {
+                        wrappedChannel.type = Constants.MENTION_CHANNELS;
+                    } else {
+                        wrappedChannel.type = Constants.MENTION_MORE_CHANNELS;
+                        if (skipNotInChannel) {
+                            continue;
+                        }
                     }
+                } else if (member) {
+                    wrappedChannel.type = Constants.MENTION_CHANNELS;
+                } else {
+                    wrappedChannel.type = Constants.MENTION_MORE_CHANNELS;
+                    if (skipNotInChannel || !newChannel.display_name.startsWith(channelPrefix)) {
+                        continue;
+                    }
+                }
 
-                    const channelNames = channels.
-                        sort(sortChannelsByDisplayName).
-                        map((channel) => channel.name);
-
-                    AppDispatcher.handleServerAction({
-                        type: ActionTypes.SUGGESTION_RECEIVED_SUGGESTIONS,
-                        id: suggestionId,
-                        matchedPretext: channelPrefix,
-                        terms: channelNames,
-                        items: channels,
-                        component: SwitchChannelSuggestion
-                    });
-
-                    AppDispatcher.handleServerAction({
-                        type: ActionTypes.RECEIVED_PROFILES,
-                        profiles: userMap
-                    });
+                channels.push(wrappedChannel);
+            }
+        }
+
+        for (let i = 0; i < users.length; i++) {
+            const user = users[i];
+            const isDMVisible = getBool(getState(), Preferences.CATEGORY_DIRECT_CHANNEL_SHOW, user.id, false);
+            let displayName = `@${user.username} `;
+
+            if (user.id === currentId) {
+                continue;
+            }
+
+            if ((user.first_name || user.last_name) && user.nickname) {
+                displayName += `- ${Utils.getFullName(user)} (${user.nickname})`;
+            } else if (user.nickname) {
+                displayName += `- (${user.nickname})`;
+            } else if (user.first_name || user.last_name) {
+                displayName += `- ${Utils.getFullName(user)}`;
+            }
+
+            const wrappedChannel = {
+                channel: {
+                    display_name: displayName,
+                    name: user.username,
+                    id: user.id,
+                    update_at: user.update_at,
+                    type: Constants.DM_CHANNEL
+                },
+                name: user.username
+            };
+
+            if (isDMVisible) {
+                wrappedChannel.type = Constants.MENTION_CHANNELS;
+            } else {
+                wrappedChannel.type = Constants.MENTION_MORE_CHANNELS;
+                if (skipNotInChannel) {
+                    continue;
                 }
-            );
+            }
+
+            channels.push(wrappedChannel);
         }
+
+        const channelNames = channels.
+            sort(quickSwitchSorter).
+            map((wrappedChannel) => wrappedChannel.channel.name);
+
+        if (skipNotInChannel) {
+            channels.push({
+                type: Constants.MENTION_MORE_CHANNELS,
+                loading: true
+            });
+        }
+
+        setTimeout(() => {
+            AppDispatcher.handleServerAction({
+                type: ActionTypes.SUGGESTION_RECEIVED_SUGGESTIONS,
+                id: suggestionId,
+                matchedPretext: channelPrefix,
+                terms: channelNames,
+                items: channels,
+                component: SwitchChannelSuggestion
+            });
+        }, 0);
     }
 }
diff --git a/webapp/components/suggestion/switch_team_provider.jsx b/webapp/components/suggestion/switch_team_provider.jsx
new file mode 100644
index 000000000..ff2a8f24b
--- /dev/null
+++ b/webapp/components/suggestion/switch_team_provider.jsx
@@ -0,0 +1,96 @@
+// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+import Suggestion from './suggestion.jsx';
+import Provider from './provider.jsx';
+
+import AppDispatcher from 'dispatcher/app_dispatcher.jsx';
+import {ActionTypes} from 'utils/constants.jsx';
+import LocalizationStore from 'stores/localization_store.jsx';
+
+import React from 'react';
+
+// Redux actions
+import store from 'stores/redux_store.jsx';
+const getState = store.getState;
+
+import * as Selectors from 'mattermost-redux/selectors/entities/teams';
+
+class SwitchTeamSuggestion extends Suggestion {
+    render() {
+        const {item, isSelection} = this.props;
+
+        let className = 'mentions__name';
+        if (isSelection) {
+            className += ' suggestion--selected';
+        }
+
+        return (
+            <div
+                onClick={this.handleClick}
+                className={className}
+            >
+                <div className='status'><i className='fa fa-group'/></div>
+                {item.display_name}
+            </div>
+        );
+    }
+}
+
+let prefix = '';
+
+function quickSwitchSorter(a, b) {
+    const aDisplayName = a.display_name.toLowerCase();
+    const bDisplayName = b.display_name.toLowerCase();
+    const aStartsWith = aDisplayName.startsWith(prefix);
+    const bStartsWith = bDisplayName.startsWith(prefix);
+
+    if (aStartsWith && bStartsWith) {
+        const locale = LocalizationStore.getLocale();
+
+        if (aDisplayName !== bDisplayName) {
+            return aDisplayName.localeCompare(bDisplayName, locale, {numeric: true});
+        }
+
+        return a.name.localeCompare(b.name, locale, {numeric: true});
+    } else if (aStartsWith) {
+        return -1;
+    }
+
+    return 1;
+}
+
+export default class SwitchTeamProvider extends Provider {
+    handlePretextChanged(suggestionId, teamPrefix) {
+        if (teamPrefix) {
+            prefix = teamPrefix;
+            this.startNewRequest(suggestionId, teamPrefix);
+
+            const allTeams = Selectors.getMyTeams(getState());
+
+            const teams = allTeams.filter((team) => {
+                return team.display_name.toLowerCase().indexOf(teamPrefix) !== -1 ||
+                    team.name.indexOf(teamPrefix) !== -1;
+            });
+
+            const teamNames = teams.
+                sort(quickSwitchSorter).
+                map((team) => team.name);
+
+            setTimeout(() => {
+                AppDispatcher.handleServerAction({
+                    type: ActionTypes.SUGGESTION_RECEIVED_SUGGESTIONS,
+                    id: suggestionId,
+                    matchedPretext: teamPrefix,
+                    terms: teamNames,
+                    items: teams,
+                    component: SwitchTeamSuggestion
+                });
+            }, 0);
+
+            return true;
+        }
+
+        return false;
+    }
+}