Management: Group Statistics (#1774)

src/api/gramjs/apiBuilders/statistics.ts

@@ -1,12 +1,14 @@
 import { Api as GramJs } from '../../../lib/gramjs';
 import {
-  ApiStatistics,
+  ApiChannelStatistics,
+  ApiGroupStatistics,
   StatisticsGraph,
   StatisticsOverviewItem,
   StatisticsOverviewPercentage,
+  StatisticsOverviewPeriod,
 } from '../../types';
 
-export function buildStatistics(stats: GramJs.stats.BroadcastStats): ApiStatistics {
+export function buildChannelStatistics(stats: GramJs.stats.BroadcastStats): ApiChannelStatistics {
   return {
     // Graphs
     growthGraph: buildGraph(stats.growthGraph),
@@ -31,6 +33,27 @@ export function buildStatistics(stats: GramJs.stats.BroadcastStats): ApiStatisti
   };
 }
 
+export function buildGroupStatistics(stats: GramJs.stats.MegagroupStats): ApiGroupStatistics {
+  return {
+    // Graphs
+    growthGraph: buildGraph(stats.growthGraph),
+    membersGraph: buildGraph(stats.membersGraph),
+    topHoursGraph: buildGraph(stats.topHoursGraph),
+
+    // Async graphs
+    languagesGraph: (stats.languagesGraph as GramJs.StatsGraphAsync).token,
+    messagesGraph: (stats.messagesGraph as GramJs.StatsGraphAsync).token,
+    actionsGraph: (stats.actionsGraph as GramJs.StatsGraphAsync).token,
+
+    // Statistics overview
+    period: getOverviewPeriod(stats.period),
+    members: buildStatisticsOverview(stats.members),
+    viewers: buildStatisticsOverview(stats.viewers),
+    messages: buildStatisticsOverview(stats.messages),
+    posters: buildStatisticsOverview(stats.posters),
+  };
+}
+
 export function buildGraph(result: GramJs.TypeStatsGraph, isPercentage?: boolean): StatisticsGraph {
   if ((result as GramJs.StatsGraphError).error) {
     throw new Error((result as GramJs.StatsGraphError).error);
@@ -41,7 +64,7 @@ export function buildGraph(result: GramJs.TypeStatsGraph, isPercentage?: boolean
   const hasSecondYAxis = data.y_scaled;
 
   return {
-    type: getGraphType(data.types.y0, isPercentage),
+    type: isPercentage ? 'area' : data.types.y0,
     zoomToken: (result as GramJs.StatsGraph).zoomToken,
     labelFormatter: data.xTickFormatter,
     tooltipFormatter: data.xTooltipFormatter,
@@ -63,15 +86,6 @@ export function buildGraph(result: GramJs.TypeStatsGraph, isPercentage?: boolean
   };
 }
 
-function getGraphType(apiType: string, isPercentage?: boolean): string {
-  switch (apiType) {
-    case 'step':
-      return 'bar';
-    default:
-      return isPercentage ? 'area' : apiType;
-  }
-}
-
 function extractColor(color: string): string {
   return color.substring(color.indexOf('#'));
 }
@@ -113,3 +127,10 @@ function buildStatisticsPercentage(data: GramJs.StatsPercentValue): StatisticsOv
     percentage: ((data.part / data.total) * 100).toFixed(2),
   };
 }
+
+function getOverviewPeriod(data: GramJs.StatsDateRangeDays): StatisticsOverviewPeriod {
+  return {
+    maxDate: data.maxDate,
+    minDate: data.minDate,
+  };
+}

src/api/gramjs/methods/index.ts

@@ -77,4 +77,4 @@ export {
   setDefaultReaction, fetchMessageReactions, sendWatchingEmojiInteraction,
 } from './reactions';
 
-export { fetchStatistics, fetchStatisticsAsyncGraph } from './statistics';
+export { fetchChannelStatistics, fetchGroupStatistics, fetchStatisticsAsyncGraph } from './statistics';

src/api/gramjs/methods/statistics.ts

@@ -1,13 +1,17 @@
 import BigInt from 'big-integer';
 import { Api as GramJs } from '../../../lib/gramjs';
 
-import { ApiChat, ApiStatistics, StatisticsGraph } from '../../types';
+import {
+  ApiChat, ApiChannelStatistics, ApiGroupStatistics, StatisticsGraph,
+} from '../../types';
 
 import { invokeRequest } from './client';
 import { buildInputEntity } from '../gramjsBuilders';
-import { buildStatistics, buildGraph } from '../apiBuilders/statistics';
+import { buildChannelStatistics, buildGroupStatistics, buildGraph } from '../apiBuilders/statistics';
 
-export async function fetchStatistics({ chat }: { chat: ApiChat }): Promise<ApiStatistics | undefined> {
+export async function fetchChannelStatistics({
+  chat,
+}: { chat: ApiChat }): Promise<ApiChannelStatistics | undefined> {
   const result = await invokeRequest(new GramJs.stats.GetBroadcastStats({
     channel: buildInputEntity(chat.id, chat.accessHash) as GramJs.InputChannel,
   }), undefined, undefined, undefined, chat.fullInfo!.statisticsDcId);
@@ -16,7 +20,21 @@ export async function fetchStatistics({ chat }: { chat: ApiChat }): Promise<ApiS
     return undefined;
   }
 
-  return buildStatistics(result);
+  return buildChannelStatistics(result);
+}
+
+export async function fetchGroupStatistics({
+  chat,
+}: { chat: ApiChat }): Promise<ApiGroupStatistics | undefined> {
+  const result = await invokeRequest(new GramJs.stats.GetMegagroupStats({
+    channel: buildInputEntity(chat.id, chat.accessHash) as GramJs.InputChannel,
+  }), undefined, undefined, undefined, chat.fullInfo!.statisticsDcId);
+
+  if (!result) {
+    return undefined;
+  }
+
+  return buildGroupStatistics(result);
 }
 
 export async function fetchStatisticsAsyncGraph({

src/api/types/statistics.ts

@@ -1,6 +1,6 @@
 import { ApiMessage } from './messages';
 
-export interface ApiStatistics {
+export interface ApiChannelStatistics {
   growthGraph: StatisticsGraph;
   followersGraph: StatisticsGraph;
   muteGraph: StatisticsGraph;
@@ -16,6 +16,20 @@ export interface ApiStatistics {
   recentTopMessages: Array<StatisticsRecentMessage | StatisticsRecentMessage & ApiMessage>;
 }
 
+export interface ApiGroupStatistics {
+  growthGraph: StatisticsGraph;
+  membersGraph: StatisticsGraph;
+  topHoursGraph: StatisticsGraph;
+  languagesGraph: StatisticsGraph | string;
+  messagesGraph: StatisticsGraph | string;
+  actionsGraph: StatisticsGraph | string;
+  period: StatisticsOverviewPeriod;
+  members: StatisticsOverviewItem;
+  viewers: StatisticsOverviewItem;
+  messages: StatisticsOverviewItem;
+  posters: StatisticsOverviewItem;
+}
+
 export interface StatisticsGraph {
   type: string;
   zoomToken?: string;
@@ -49,6 +63,11 @@ export interface StatisticsOverviewPercentage {
   percentage: string;
 }
 
+export interface StatisticsOverviewPeriod {
+  maxDate: number;
+  minDate: number;
+}
+
 export interface StatisticsRecentMessage {
   msgId: number;
   forwards: number;

src/components/right/statistics/Statistics.scss

@@ -3,8 +3,9 @@
   overflow-x: hidden;
   overflow-y: hidden;
 
-  &--messages {
+  &__messages {
     padding: 1rem 0.75rem;
+    border-top: 1px solid var(--color-borders);
 
     &-title {
       padding-left: 0.25rem;
@@ -23,13 +24,18 @@
     overflow-y: scroll !important;
   }
 
-  .chat-container {
+  &__graph {
     margin-bottom: 1rem;
     border-bottom: 1px solid var(--color-borders);
 
     opacity: 1;
     transition: opacity 0.3s ease;
 
+    &:last-of-type {
+      margin-bottom: 0;
+      border-bottom: none;
+    }
+
     &.hidden {
       opacity: 0;
     }

src/components/right/statistics/Statistics.tsx

@@ -1,11 +1,14 @@
 import React, {
-  FC, memo, useState, useEffect, useRef,
+  FC, memo, useState, useEffect, useRef, useMemo,
 } from '../../../lib/teact/teact';
 import { getActions, withGlobal } from '../../../global';
 
 import { callApi } from '../../../api/gramjs';
 import {
-  ApiMessage, ApiStatistics, StatisticsRecentMessage as StatisticsRecentMessageType, StatisticsGraph,
+  ApiMessage,
+  ApiChannelStatistics,
+  ApiGroupStatistics,
+  StatisticsRecentMessage as StatisticsRecentMessageType,
 } from '../../../api/types';
 import { selectChat, selectStatistics } from '../../../global/selectors';
 
@@ -31,7 +34,7 @@ async function ensureLovelyChart() {
   return lovelyChartPromise;
 }
 
-const GRAPHS_TITLES = {
+const CHANNEL_GRAPHS_TITLES = {
   growthGraph: 'ChannelStats.Graph.Growth',
   followersGraph: 'ChannelStats.Graph.Followers',
   muteGraph: 'ChannelStats.Graph.Notifications',
@@ -41,7 +44,17 @@ const GRAPHS_TITLES = {
   languagesGraph: 'ChannelStats.Graph.Language',
   interactionsGraph: 'ChannelStats.Graph.Interactions',
 };
-const GRAPHS = Object.keys(GRAPHS_TITLES) as (keyof ApiStatistics)[];
+const CHANNEL_GRAPHS = Object.keys(CHANNEL_GRAPHS_TITLES) as (keyof ApiChannelStatistics)[];
+
+const GROUP_GRAPHS_TITLES = {
+  growthGraph: 'Stats.GroupGrowthTitle',
+  membersGraph: 'Stats.GroupMembersTitle',
+  languagesGraph: 'Stats.GroupLanguagesTitle',
+  messagesGraph: 'Stats.GroupMessagesTitle',
+  actionsGraph: 'Stats.GroupActionsTitle',
+  topHoursGraph: 'Stats.GroupTopHoursTitle',
+};
+const GROUP_GRAPHS = Object.keys(GROUP_GRAPHS_TITLES) as (keyof ApiGroupStatistics)[];
 
 export type OwnProps = {
   chatId: string;
@@ -49,12 +62,17 @@ export type OwnProps = {
 };
 
 export type StateProps = {
-  statistics: ApiStatistics;
+  statistics: ApiChannelStatistics | ApiGroupStatistics;
   dcId?: number;
+  isGroup: boolean;
 };
 
 const Statistics: FC<OwnProps & StateProps> = ({
-  chatId, isActive, statistics, dcId,
+  chatId,
+  isActive,
+  statistics,
+  dcId,
+  isGroup,
 }) => {
   const lang = useLang();
   // eslint-disable-next-line no-null/no-null
@@ -65,8 +83,8 @@ const Statistics: FC<OwnProps & StateProps> = ({
   const { loadStatistics, loadStatisticsAsyncGraph } = getActions();
 
   useEffect(() => {
-    loadStatistics({ chatId });
-  }, [chatId, loadStatistics]);
+    loadStatistics({ chatId, isGroup });
+  }, [chatId, loadStatistics, isGroup]);
 
   useEffect(() => {
     if (!isActive) {
@@ -74,25 +92,35 @@ const Statistics: FC<OwnProps & StateProps> = ({
     }
   }, [isActive]);
 
+  const graphs = useMemo(() => {
+    return isGroup ? GROUP_GRAPHS : CHANNEL_GRAPHS;
+  }, [isGroup]);
+
+  const graphTitles = useMemo(() => {
+    return isGroup ? GROUP_GRAPHS_TITLES : CHANNEL_GRAPHS_TITLES;
+  }, [isGroup]);
+
   // Load async graphs
   useEffect(() => {
     if (!statistics) {
       return;
     }
 
-    GRAPHS.forEach((graph) => {
-      const isAsync = typeof statistics?.[graph] === 'string';
+    graphs.forEach((name) => {
+      const graph = statistics[name as keyof typeof statistics];
+      const isAsync = typeof graph === 'string';
+
       if (isAsync) {
         loadStatisticsAsyncGraph({
-          name: graph,
+          name,
           chatId,
-          token: statistics[graph],
+          token: graph,
           // Hardcode percentage for languages graph, since API does not return `percentage` flag
-          isPercentage: graph === 'languagesGraph',
+          isPercentage: name === 'languagesGraph',
         });
       }
     });
-  }, [chatId, statistics, loadStatisticsAsyncGraph]);
+  }, [graphs, chatId, statistics, loadStatisticsAsyncGraph]);
 
   useEffect(() => {
     (async () => {
@@ -107,30 +135,32 @@ const Statistics: FC<OwnProps & StateProps> = ({
         return;
       }
 
-      GRAPHS.forEach((graph, index: number) => {
-        const isAsync = typeof statistics?.[graph] === 'string';
-        if (isAsync || loadedCharts.current.includes(graph)) {
+      graphs.forEach((name, index: number) => {
+        const graph = statistics[name as keyof typeof statistics];
+        const isAsync = typeof graph === 'string';
+
+        if (isAsync || loadedCharts.current.includes(name)) {
           return;
         }
 
-        const { zoomToken } = (statistics[graph] as StatisticsGraph);
+        const { zoomToken } = graph;
 
         LovelyChart.create(
           containerRef.current!.children[index],
           {
-            title: lang((GRAPHS_TITLES as Record<string, string>)[graph]),
+            title: lang((graphTitles as Record<string, string>)[name]),
             ...zoomToken && {
               onZoom: (x: number) => callApi('fetchStatisticsAsyncGraph', { token: zoomToken, x, dcId }),
               zoomOutLabel: lang('Graph.ZoomOut'),
             },
-            ...(statistics[graph] as StatisticsGraph),
+            ...graph,
           },
         );
 
-        loadedCharts.current.push(graph);
+        loadedCharts.current.push(name);
       });
     })();
-  }, [isReady, statistics, lang, chatId, loadStatisticsAsyncGraph, dcId]);
+  }, [graphs, graphTitles, isReady, statistics, lang, chatId, loadStatisticsAsyncGraph, dcId]);
 
   if (!isReady || !statistics) {
     return <Loading />;
@@ -138,21 +168,21 @@ const Statistics: FC<OwnProps & StateProps> = ({
 
   return (
     <div className={buildClassName('Statistics custom-scroll', isReady && 'ready')}>
-      <StatisticsOverview statistics={statistics} />
+      <StatisticsOverview statistics={statistics} isGroup={isGroup} />
 
       {!loadedCharts.current.length && <Loading />}
 
       <div ref={containerRef}>
-        {GRAPHS.map((graph) => (
-          <div className={buildClassName('chat-container', !loadedCharts.current.includes(graph) && 'hidden')} />
+        {graphs.map((graph) => (
+          <div className={buildClassName('Statistics__graph', !loadedCharts.current.includes(graph) && 'hidden')} />
         ))}
       </div>
 
-      {Boolean(statistics.recentTopMessages?.length) && (
-        <div className="Statistics--messages">
-          <h2 className="Statistics--messages-title">{lang('ChannelStats.Recent.Header')}</h2>
+      {Boolean((statistics as ApiChannelStatistics).recentTopMessages?.length) && (
+        <div className="Statistics__messages">
+          <h2 className="Statistics__messages-title">{lang('ChannelStats.Recent.Header')}</h2>
 
-          {statistics.recentTopMessages.map((message) => (
+          {(statistics as ApiChannelStatistics).recentTopMessages.map((message) => (
             <StatisticsRecentMessage message={message as ApiMessage & StatisticsRecentMessageType} />
           ))}
         </div>
@@ -164,8 +194,10 @@ const Statistics: FC<OwnProps & StateProps> = ({
 export default memo(withGlobal<OwnProps>(
   (global, { chatId }): StateProps => {
     const statistics = selectStatistics(global, chatId);
-    const dcId = selectChat(global, chatId)?.fullInfo?.statisticsDcId;
+    const chat = selectChat(global, chatId);
+    const dcId = chat?.fullInfo?.statisticsDcId;
+    const isGroup = chat?.type === 'chatTypeSuperGroup';
 
-    return { statistics, dcId };
+    return { statistics, dcId, isGroup };
   },
 )(Statistics));

src/components/right/statistics/StatisticsOverview.scss

@@ -3,7 +3,16 @@
   margin-bottom: 1rem;
   border-bottom: 1px solid var(--color-borders);
 
-  &--title {
+  &__header {
+    margin-bottom: 0.5rem;
+    font-weight: 500;
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+  }
+
+  &__title {
+    margin-right: 2em;
     padding-left: 0.25rem;
     font-size: 16px;
     color: var(--text-color);
@@ -15,7 +24,12 @@
     }
   }
 
-  &--table {
+  &__caption {
+    font-size: 0.75rem;
+    text-align: right;
+  }
+
+  &__table {
     width: 100%;
 
     &-heading {
@@ -29,7 +43,7 @@
     }
   }
 
-  &--value {
+  &__value {
     font-size: 0.6875rem;
     color: var(--color-text-green);
 

src/components/right/statistics/StatisticsOverview.tsx

@@ -1,25 +1,60 @@
 import React, { FC, memo } from '../../../lib/teact/teact';
 
-import { ApiStatistics, StatisticsOverviewItem } from '../../../api/types';
+import { ApiChannelStatistics, ApiGroupStatistics, StatisticsOverviewItem } from '../../../api/types';
 
+import { formatIntegerCompact } from '../../../util/textFormat';
+import { formatFullDate } from '../../../util/dateFormat';
 import buildClassName from '../../../util/buildClassName';
 import useLang from '../../../hooks/useLang';
 
 import './StatisticsOverview.scss';
 
-export type OwnProps = {
-  statistics: ApiStatistics;
+type OverviewCell = {
+  name: string;
+  title: string;
+  isPercentage?: boolean;
 };
 
-const StatisticsOverview: FC<OwnProps> = ({ statistics }) => {
+const CHANNEL_OVERVIEW: OverviewCell[][] = [
+  [
+    { name: 'followers', title: 'ChannelStats.Overview.Followers' },
+    { name: 'enabledNotifications', title: 'ChannelStats.Overview.EnabledNotifications', isPercentage: true },
+  ],
+  [
+    { name: 'viewsPerPost', title: 'ChannelStats.Overview.ViewsPerPost' },
+    { name: 'sharesPerPost', title: 'ChannelStats.Overview.SharesPerPost' },
+  ],
+];
+
+const GROUP_OVERVIEW: OverviewCell[][] = [
+  [
+    { name: 'members', title: 'Stats.GroupMembers' },
+    { name: 'messages', title: 'Stats.GroupMessages' },
+  ],
+  [
+    { name: 'viewers', title: 'Stats.GroupViewers' },
+    { name: 'posters', title: 'Stats.GroupPosters' },
+  ],
+];
+
+export type OwnProps = {
+  isGroup?: boolean;
+  statistics: ApiChannelStatistics | ApiGroupStatistics;
+};
+
+const StatisticsOverview: FC<OwnProps> = ({ isGroup, statistics }) => {
   const lang = useLang();
 
   const renderOverviewItemValue = ({ change, percentage }: StatisticsOverviewItem) => {
+    if (!change) {
+      return undefined;
+    }
+
     const isChangeNegative = Number(change) < 0;
 
     return (
-      <span className={buildClassName('StatisticsOverview--value', isChangeNegative && 'negative')}>
-        {isChangeNegative ? change : `+${change}`}
+      <span className={buildClassName('StatisticsOverview__value', isChangeNegative && 'negative')}>
+        {isChangeNegative ? `-${formatIntegerCompact(Math.abs(change))}` : `+${formatIntegerCompact(change)}`}
         {percentage && (
           <>
             {' '}
@@ -30,40 +65,48 @@ const StatisticsOverview: FC<OwnProps> = ({ statistics }) => {
     );
   };
 
-  const {
-    followers, viewsPerPost, sharesPerPost, enabledNotifications,
-  } = statistics;
+  const { period } = (statistics as ApiGroupStatistics);
 
   return (
     <div className="StatisticsOverview">
-      <h2 className="StatisticsOverview--title">{lang('ChannelStats.Overview')}</h2>
+      <div className="StatisticsOverview__header">
+        <div className="StatisticsOverview__title">{lang('ChannelStats.Overview')}</div>
 
-      <table className="StatisticsOverview--table">
-        <tr>
-          <td>
-            <b className="StatisticsOverview--table-value">{followers.current}</b> {renderOverviewItemValue(followers)}
-            <h3 className="StatisticsOverview--table-heading">{lang('ChannelStats.Overview.Followers')}</h3>
-          </td>
-          <td>
-            <b className="StatisticsOverview--table-value">{enabledNotifications.percentage}%</b>
-            <h3 className="StatisticsOverview--table-heading">{lang('ChannelStats.Overview.EnabledNotifications')}</h3>
-          </td>
-        </tr>
+        {period && (
+          <div className="StatisticsOverview__caption">
+            {formatFullDate(lang, period.minDate * 1000)} — {formatFullDate(lang, period.maxDate * 1000)}
+          </div>
+        )}
+      </div>
 
-        <tr>
-          <td>
-            <b className="StatisticsOverview--table-value">{viewsPerPost.current}</b>
-            {' '}
-            {renderOverviewItemValue(viewsPerPost)}
-            <h3 className="StatisticsOverview--table-heading">{lang('ChannelStats.Overview.ViewsPerPost')}</h3>
-          </td>
-          <td>
-            <b className="StatisticsOverview--table-value">{sharesPerPost.current}</b>
-            {' '}
-            {renderOverviewItemValue(sharesPerPost)}
-            <h3 className="StatisticsOverview--table-heading">{lang('ChannelStats.Overview.SharesPerPost')}</h3>
-          </td>
-        </tr>
+      <table className="StatisticsOverview__table">
+        {(isGroup ? GROUP_OVERVIEW : CHANNEL_OVERVIEW).map((row) => (
+          <tr>
+            {row.map((cell: OverviewCell) => {
+              const field = (statistics as any)[cell.name];
+
+              if (cell.isPercentage) {
+                return (
+                  <td>
+                    <b className="StatisticsOverview__table-value">{field.percentage}%</b>
+                    <h3 className="StatisticsOverview__table-heading">{lang(cell.title)}</h3>
+                  </td>
+                );
+              }
+
+              return (
+                <td>
+                  <b className="StatisticsOverview__table-value">
+                    {formatIntegerCompact(field.current)}
+                  </b>
+                  {' '}
+                  {renderOverviewItemValue(field)}
+                  <h3 className="StatisticsOverview__table-heading">{lang(cell.title)}</h3>
+                </td>
+              );
+            })}
+          </tr>
+        ))}
       </table>
     </div>
   );

src/components/right/statistics/StatisticsRecentMessage.scss

@@ -2,14 +2,14 @@
   position: relative;
   padding-left: 3rem;
 
-  &--summary {
+  &__summary {
     flex: 1;
     overflow: hidden;
     white-space: nowrap;
     text-overflow: ellipsis;
     margin-right: 0.75rem;
 
-    .media-preview--image {
+    .media-preview__image {
       width: 2.5rem;
       height: 2.5rem;
       position: absolute;
@@ -35,24 +35,24 @@
     }
   }
 
-  &--title {
+  &__title {
     display: flex;
     align-items: center;
     line-height: 1.25rem;
   }
 
-  &--info {
+  &__info {
     display: flex;
     align-items: center;
     width: 100%;
     color: var(--color-text-meta);
   }
 
-  &--meta {
+  &__meta {
     font-size: 0.75rem;
   }
 
-  &--date {
+  &__date {
     flex: 1;
     font-size: 0.8125rem;
   }

src/components/right/statistics/StatisticsRecentMessage.tsx

@@ -30,20 +30,20 @@ const StatisticsRecentMessage: FC<OwnProps> = ({ message }) => {
 
   return (
     <p className="StatisticsRecentMessage">
-      <div className="StatisticsRecentMessage--title">
-        <div className="StatisticsRecentMessage--summary">
+      <div className="StatisticsRecentMessage__title">
+        <div className="StatisticsRecentMessage__summary">
           {renderSummary(lang, message, mediaBlobUrl || mediaThumbnail, isRoundVideo)}
         </div>
-        <div className="StatisticsRecentMessage--meta">
+        <div className="StatisticsRecentMessage__meta">
           {lang('ChannelStats.ViewsCount', message.views)}
         </div>
       </div>
 
-      <div className="StatisticsRecentMessage--info">
-        <div className="StatisticsRecentMessage--date">
+      <div className="StatisticsRecentMessage__info">
+        <div className="StatisticsRecentMessage__date">
           {formatDateTimeToString(message.date * 1000, lang.code)}
         </div>
-        <div className="StatisticsRecentMessage--meta">
+        <div className="StatisticsRecentMessage__meta">
           {message.forwards ? lang('ChannelStats.SharesCount', message.forwards) : 'No shares'}
         </div>
       </div>
@@ -58,7 +58,7 @@ function renderSummary(lang: LangFn, message: ApiMessage, blobUrl?: string, isRo
 
   return (
     <span className="media-preview">
-      <img src={blobUrl} alt="" className={buildClassName('media-preview--image', isRoundVideo && 'round')} />
+      <img src={blobUrl} alt="" className={buildClassName('media-preview__image', isRoundVideo && 'round')} />
       {getMessageVideo(message) && <i className="icon-play" />}
       {renderMessageSummary(lang, message, true)}
     </span>

src/global/actions/api/statistics.ts

@@ -1,27 +1,28 @@
 import { addActionHandler, getGlobal } from '../../index';
 
+import { ApiChannelStatistics } from '../../../api/types';
 import { callApi } from '../../../api/gramjs';
 import { updateStatistics, updateStatisticsGraph } from '../../reducers';
 import { selectChatMessages, selectChat } from '../../selectors';
 
 addActionHandler('loadStatistics', async (global, actions, payload) => {
-  const { chatId } = payload;
+  const { chatId, isGroup } = payload;
   const chat = selectChat(global, chatId);
   if (!chat?.fullInfo) {
     return undefined;
   }
 
-  const result = await callApi('fetchStatistics', { chat });
+  const result = await callApi(isGroup ? 'fetchGroupStatistics' : 'fetchChannelStatistics', { chat });
   if (!result) {
     return undefined;
   }
 
   global = getGlobal();
 
-  if (result?.recentTopMessages.length) {
+  if ((result as ApiChannelStatistics).recentTopMessages?.length) {
     const messages = selectChatMessages(global, chatId);
 
-    result.recentTopMessages = result.recentTopMessages
+    (result as ApiChannelStatistics).recentTopMessages = (result as ApiChannelStatistics).recentTopMessages
       .map((message) => ({ ...message, ...messages[message.msgId] }));
   }
 

src/global/actions/ui/chats.ts

@@ -33,6 +33,7 @@ addActionHandler('openChat', (global, actions, payload) => {
 
     global = {
       ...global,
+      isStatisticsShown: false,
       messages: {
         ...global.messages,
         contentToBeScheduled: undefined,

src/global/reducers/statistics.ts

@@ -1,8 +1,8 @@
 import { GlobalState } from '../types';
-import { ApiStatistics, StatisticsGraph } from '../../api/types';
+import { ApiChannelStatistics, ApiGroupStatistics, StatisticsGraph } from '../../api/types';
 
 export function updateStatistics(
-  global: GlobalState, chatId: string, statistics: ApiStatistics,
+  global: GlobalState, chatId: string, statistics: ApiChannelStatistics | ApiGroupStatistics,
 ): GlobalState {
   return {
     ...global,

src/global/types.ts

@@ -26,7 +26,8 @@ import {
   ApiAvailableReaction,
   ApiAppConfig,
   ApiSponsoredMessage,
-  ApiStatistics,
+  ApiChannelStatistics,
+  ApiGroupStatistics,
   ApiPaymentFormNativeParams, ApiUpdate,
 } from '../api/types';
 import {
@@ -508,7 +509,7 @@ export type GlobalState = {
   serviceNotifications: ServiceNotification[];
 
   statistics: {
-    byChatId: Record<string, ApiStatistics>;
+    byChatId: Record<string, ApiChannelStatistics | ApiGroupStatistics>;
   };
 
   newContact?: {

src/lib/gramjs/tl/apiTl.js

@@ -1170,4 +1170,5 @@ langpack.getStrings#efea3803 lang_pack:string lang_code:string keys:Vector<strin
 langpack.getLanguages#42c6978f lang_pack:string = Vector<LangPackLanguage>;
 folders.editPeerFolders#6847d0ab folder_peers:Vector<InputFolderPeer> = Updates;
 stats.getBroadcastStats#ab42441a flags:# dark:flags.0?true channel:InputChannel = stats.BroadcastStats;
-stats.loadAsyncGraph#621d5fa0 flags:# token:string x:flags.0?long = StatsGraph;`;
+stats.loadAsyncGraph#621d5fa0 flags:# token:string x:flags.0?long = StatsGraph;
+stats.getMegagroupStats#dcdf8607 flags:# dark:flags.0?true channel:InputChannel = stats.MegagroupStats;`;

src/lib/gramjs/tl/static/api.json

@@ -211,5 +211,6 @@
     "messages.setDefaultReaction",
     "help.getAppConfig",
     "stats.getBroadcastStats",
+    "stats.getMegagroupStats",
     "stats.loadAsyncGraph"
 ]

src/lib/lovely-chart/LovelyChart.js

@@ -152,7 +152,7 @@ function create(container, originalData) {
   }
 
   function _onFocus(focusOn) {
-    if (_data.isBars || _data.isPie) {
+    if (_data.isBars || _data.isPie || _data.isSteps) {
       // TODO animate
       _stateManager.update({ focusOn });
     }

src/lib/lovely-chart/StateManager.js

@@ -143,7 +143,6 @@ function calculateYRanges(data, filter, labelFromIndex, labelToIndex, prevState)
   const yRanges = calculateYRangesForGroup(data, labelFromIndex, labelToIndex, prevState, filteredDatasets);
 
   if (secondaryYAxisDataset) {
-    const group = filter[secondaryYAxisDataset.key] ? [secondaryYAxisDataset] : [];
     const {
       yMinViewport: yMinViewportSecond,
       yMaxViewport: yMaxViewportSecond,

src/lib/lovely-chart/Tooltip.js

@@ -408,7 +408,7 @@ export function createTooltip(container, data, plotSize, colors, onZoom, onFocus
       }
     });
 
-    if (data.isBars && data.isStacked) {
+    if ((data.isBars || data.isSteps) && data.isStacked) {
       _renderTotal(dataSetContainer, formatInteger(totalValue));
     }
 

src/lib/lovely-chart/data.js

@@ -48,6 +48,7 @@ export function analyzeData(data) {
     onZoom,
     isLines: data.type === 'line',
     isBars: data.type === 'bar',
+    isSteps: data.type === 'step',
     isAreas: data.type === 'area',
     isPie: data.type === 'pie',
     yMin: totalYMin,

src/lib/lovely-chart/drawDatasets.js

@@ -58,14 +58,14 @@ export function drawDatasets(
     drawDataset(datasetType, context, datasetPoints, datasetProjection, options);
   });
 
-  if (state.focusOn && data.isBars) {
+  if (state.focusOn && (data.isBars || data.isSteps)) {
     const [x0] = toPixels(projection, 0, 0);
     const [x1] = toPixels(projection, 1, 0);
 
     drawBarsMask(context, projection, {
       focusOn: state.focusOn,
       color: getCssColor(colors, 'mask'),
-      lineWidth: x1 - x0,
+      lineWidth: data.isSteps ? x1 - x0 + lineWidth : x1 - x0,
     });
   }
 }
@@ -76,6 +76,8 @@ function drawDataset(type, ...args) {
       return drawDatasetLine(...args);
     case 'bar':
       return drawDatasetBars(...args);
+    case 'step':
+      return drawDatasetSteps(...args);
     case 'area':
       return drawDatasetArea(...args);
     case 'pie':
@@ -138,6 +140,31 @@ function drawDatasetBars(context, points, projection, options) {
   context.restore();
 }
 
+function drawDatasetSteps(context, points, projection, options) {
+  context.beginPath();
+
+  let pixels = [];
+
+  for (let j = 0, l = points.length; j < l; j++) {
+    const { labelIndex, stackValue } = points[j];
+    pixels.push(
+      toPixels(projection, labelIndex - PLOT_BARS_WIDTH_SHIFT, stackValue),
+      toPixels(projection, labelIndex + PLOT_BARS_WIDTH_SHIFT, stackValue),
+    );
+  }
+
+  pixels.forEach(([x, y]) => {
+    context.lineTo(x, y);
+  });
+
+  context.save();
+  context.strokeStyle = options.color;
+  context.lineWidth = options.lineWidth;
+  context.globalAlpha = options.opacity;
+  context.stroke();
+  context.restore();
+}
+
 function drawBarsMask(context, projection, options) {
   const [xCenter, yCenter] = projection.getCenter();
   const [width, height] = projection.getSize();

src/lib/lovely-chart/styles/_header.scss

@@ -17,7 +17,7 @@
   &-title {
     font-size: 16px;
     float: left;
-    margin-right: 1em;
+    margin-right: 2em;
     text-transform: lowercase;
 
     &:first-letter {