[Glitch] Replace shortNumberFormat with <ShortNumber>

Port cb2adaaf9d6c3147de9060132b69933df734d5dc to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

7 files changed, 445 insertions, 64 deletions

diff --git a/app/javascript/flavours/glitch/components/autosuggest_hashtag.js b/app/javascript/flavours/glitch/components/autosuggest_hashtag.js
index 648987dfd..d787ed07a 100644
--- a/app/javascript/flavours/glitch/components/autosuggest_hashtag.js
+++ b/app/javascript/flavours/glitch/components/autosuggest_hashtag.js
@@ -1,6 +1,6 @@
 import React from 'react';
 import PropTypes from 'prop-types';
-import { shortNumberFormat } from 'flavours/glitch/util/numbers';
+import ShortNumber from 'flavours/glitch/components/short_number';
 import { FormattedMessage } from 'react-intl';
 
 export default class AutosuggestHashtag extends React.PureComponent {
@@ -13,14 +13,28 @@ export default class AutosuggestHashtag extends React.PureComponent {
     }).isRequired,
   };
 
-  render () {
+  render() {
     const { tag } = this.props;
-    const weeklyUses = tag.history && shortNumberFormat(tag.history.reduce((total, day) => total + (day.uses * 1), 0));
+    const weeklyUses = tag.history && (
+      <ShortNumber
+        value={tag.history.reduce((total, day) => total + day.uses * 1, 0)}
+      />
+    );
 
     return (
       <div className='autosuggest-hashtag'>
-        <div className='autosuggest-hashtag__name'>#<strong>{tag.name}</strong></div>
-        {tag.history !== undefined && <div className='autosuggest-hashtag__uses'><FormattedMessage id='autosuggest_hashtag.per_week' defaultMessage='{count} per week' values={{ count: weeklyUses }} /></div>}
+        <div className='autosuggest-hashtag__name'>
+          #<strong>{tag.name}</strong>
+        </div>
+        {tag.history !== undefined && (
+          <div className='autosuggest-hashtag__uses'>
+            <FormattedMessage
+              id='autosuggest_hashtag.per_week'
+              defaultMessage='{count} per week'
+              values={{ count: weeklyUses }}
+            />
+          </div>
+        )}
       </div>
     );
   }
diff --git a/app/javascript/flavours/glitch/components/common_counter.js b/app/javascript/flavours/glitch/components/common_counter.js
new file mode 100644
index 000000000..4fdf3babf
--- /dev/null
+++ b/app/javascript/flavours/glitch/components/common_counter.js
@@ -0,0 +1,62 @@
+// @ts-check
+import React from 'react';
+import { FormattedMessage } from 'react-intl';
+
+/**
+ * Returns custom renderer for one of the common counter types
+ *
+ * @param {"statuses" | "following" | "followers"} counterType
+ * Type of the counter
+ * @param {boolean} isBold Whether display number must be displayed in bold
+ * @returns {(displayNumber: JSX.Element, pluralReady: number) => JSX.Element}
+ * Renderer function
+ * @throws If counterType is not covered by this function
+ */
+export function counterRenderer(counterType, isBold = true) {
+  /**
+   * @type {(displayNumber: JSX.Element) => JSX.Element}
+   */
+  const renderCounter = isBold
+    ? (displayNumber) => <strong>{displayNumber}</strong>
+    : (displayNumber) => displayNumber;
+
+  switch (counterType) {
+  case 'statuses': {
+    return (displayNumber, pluralReady) => (
+      <FormattedMessage
+        id='account.statuses_counter'
+        defaultMessage='{count, plural, one {{counter} Toot} other {{counter} Toots}}'
+        values={{
+          count: pluralReady,
+          counter: renderCounter(displayNumber),
+        }}
+      />
+    );
+  }
+  case 'following': {
+    return (displayNumber, pluralReady) => (
+      <FormattedMessage
+        id='account.following_counter'
+        defaultMessage='{count, plural, other {{counter} Following}}'
+        values={{
+          count: pluralReady,
+          counter: renderCounter(displayNumber),
+        }}
+      />
+    );
+  }
+  case 'followers': {
+    return (displayNumber, pluralReady) => (
+      <FormattedMessage
+        id='account.followers_counter'
+        defaultMessage='{count, plural, one {{counter} Follower} other {{counter} Followers}}'
+        values={{
+          count: pluralReady,
+          counter: renderCounter(displayNumber),
+        }}
+      />
+    );
+  }
+  default: throw Error(`Incorrect counter name: ${counterType}. Ensure it accepted by commonCounter function`);
+  }
+}
diff --git a/app/javascript/flavours/glitch/components/hashtag.js b/app/javascript/flavours/glitch/components/hashtag.js
index d42bee0e9..639d87a1e 100644
--- a/app/javascript/flavours/glitch/components/hashtag.js
+++ b/app/javascript/flavours/glitch/components/hashtag.js
@@ -1,26 +1,65 @@
+// @ts-check
 import React from 'react';
 import { Sparklines, SparklinesCurve } from 'react-sparklines';
 import { FormattedMessage } from 'react-intl';
 import ImmutablePropTypes from 'react-immutable-proptypes';
 import Permalink from './permalink';
-import { shortNumberFormat } from 'flavours/glitch/util/numbers';
+import ShortNumber from 'flavours/glitch/components/short_number';
+
+/**
+ * Used to render counter of how much people are talking about hashtag
+ *
+ * @type {(displayNumber: JSX.Element, pluralReady: number) => JSX.Element}
+ */
+const accountsCountRenderer = (displayNumber, pluralReady) => (
+  <FormattedMessage
+    id='trends.counter_by_accounts'
+    defaultMessage='{count, plural, one {{counter} person} other {{counter} people}} talking'
+    values={{
+      count: pluralReady,
+      counter: <strong>{displayNumber}</strong>,
+    }}
+  />
+);
 
 const Hashtag = ({ hashtag }) => (
   <div className='trends__item'>
     <div className='trends__item__name'>
-      <Permalink href={hashtag.get('url')} to={`/timelines/tag/${hashtag.get('name')}`}>
+      <Permalink
+        href={hashtag.get('url')}
+        to={`/timelines/tag/${hashtag.get('name')}`}
+      >
         #<span>{hashtag.get('name')}</span>
       </Permalink>
 
-      <FormattedMessage id='trends.count_by_accounts' defaultMessage='{count} {rawCount, plural, one {person} other {people}} talking' values={{ rawCount: hashtag.getIn(['history', 0, 'accounts']) * 1 + hashtag.getIn(['history', 1, 'accounts']) * 1, count: <strong>{shortNumberFormat(hashtag.getIn(['history', 0, 'accounts']) * 1 + hashtag.getIn(['history', 1, 'accounts']) * 1)}</strong> }} />
+      <ShortNumber
+        value={
+          hashtag.getIn(['history', 0, 'accounts']) * 1 +
+          hashtag.getIn(['history', 1, 'accounts']) * 1
+        }
+        renderer={accountsCountRenderer}
+      />
     </div>
 
     <div className='trends__item__current'>
-      {shortNumberFormat(hashtag.getIn(['history', 0, 'uses']) * 1 + hashtag.getIn(['history', 1, 'uses']) * 1)}
+      <ShortNumber
+        value={
+          hashtag.getIn(['history', 0, 'uses']) * 1 +
+          hashtag.getIn(['history', 1, 'uses']) * 1
+        }
+      />
     </div>
 
     <div className='trends__item__sparkline'>
-      <Sparklines width={50} height={28} data={hashtag.get('history').reverse().map(day => day.get('uses')).toArray()}>
+      <Sparklines
+        width={50}
+        height={28}
+        data={hashtag
+          .get('history')
+          .reverse()
+          .map((day) => day.get('uses'))
+          .toArray()}
+      >
         <SparklinesCurve style={{ fill: 'none' }} />
       </Sparklines>
     </div>
diff --git a/app/javascript/flavours/glitch/components/short_number.js b/app/javascript/flavours/glitch/components/short_number.js
new file mode 100644
index 000000000..e4ba09634
--- /dev/null
+++ b/app/javascript/flavours/glitch/components/short_number.js
@@ -0,0 +1,117 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { toShortNumber, pluralReady, DECIMAL_UNITS } from '../util/numbers';
+import { FormattedMessage, FormattedNumber } from 'react-intl';
+// @ts-check
+
+/**
+ * @callback ShortNumberRenderer
+ * @param {JSX.Element} displayNumber Number to display
+ * @param {number} pluralReady Number used for pluralization
+ * @returns {JSX.Element} Final render of number
+ */
+
+/**
+ * @typedef {object} ShortNumberProps
+ * @property {number} value Number to display in short variant
+ * @property {ShortNumberRenderer} [renderer]
+ * Custom renderer for numbers, provided as a prop. If another renderer
+ * passed as a child of this component, this prop won't be used.
+ * @property {ShortNumberRenderer} [children]
+ * Custom renderer for numbers, provided as a child. If another renderer
+ * passed as a prop of this component, this one will be used instead.
+ */
+
+/**
+ * Component that renders short big number to a shorter version
+ *
+ * @param {ShortNumberProps} param0 Props for the component
+ * @returns {JSX.Element} Rendered number
+ */
+function ShortNumber({ value, renderer, children }) {
+  const shortNumber = toShortNumber(value);
+  const [, division] = shortNumber;
+
+  // eslint-disable-next-line eqeqeq
+  if (children != null && renderer != null) {
+    console.warn('Both renderer prop and renderer as a child provided. This is a mistake and you really should fix that. Only renderer passed as a child will be used.');
+  }
+
+  // eslint-disable-next-line eqeqeq
+  const customRenderer = children != null ? children : renderer;
+
+  const displayNumber = <ShortNumberCounter value={shortNumber} />;
+
+  // eslint-disable-next-line eqeqeq
+  return customRenderer != null
+    ? customRenderer(displayNumber, pluralReady(value, division))
+    : displayNumber;
+}
+
+ShortNumber.propTypes = {
+  value: PropTypes.number.isRequired,
+  renderer: PropTypes.func,
+  children: PropTypes.func,
+};
+
+/**
+ * @typedef {object} ShortNumberCounterProps
+ * @property {import('../util/number').ShortNumber} value Short number
+ */
+
+/**
+ * Renders short number into corresponding localizable react fragment
+ *
+ * @param {ShortNumberCounterProps} param0 Props for the component
+ * @returns {JSX.Element} FormattedMessage ready to be embedded in code
+ */
+function ShortNumberCounter({ value }) {
+  const [rawNumber, unit, maxFractionDigits = 0] = value;
+
+  const count = (
+    <FormattedNumber
+      value={rawNumber}
+      maximumFractionDigits={maxFractionDigits}
+    />
+  );
+
+  let values = { count, rawNumber };
+
+  switch (unit) {
+  case DECIMAL_UNITS.THOUSAND: {
+    return (
+      <FormattedMessage
+        id='units.short.thousand'
+        defaultMessage='{count}K'
+        values={values}
+      />
+    );
+  }
+  case DECIMAL_UNITS.MILLION: {
+    return (
+      <FormattedMessage
+        id='units.short.million'
+        defaultMessage='{count}M'
+        values={values}
+      />
+    );
+  }
+  case DECIMAL_UNITS.BILLION: {
+    return (
+      <FormattedMessage
+        id='units.short.billion'
+        defaultMessage='{count}B'
+        values={values}
+      />
+    );
+  }
+  // Not sure if we should go farther - @Sasha-Sorokin
+  default: return count;
+  }
+}
+
+ShortNumberCounter.propTypes = {
+  value: PropTypes.arrayOf(PropTypes.number),
+};
+
+export default React.memo(ShortNumber);
diff --git a/app/javascript/flavours/glitch/features/account/components/header.js b/app/javascript/flavours/glitch/features/account/components/header.js
index a5abf38ae..4ef8036fc 100644
--- a/app/javascript/flavours/glitch/features/account/components/header.js
+++ b/app/javascript/flavours/glitch/features/account/components/header.js
@@ -9,7 +9,6 @@ import classNames from 'classnames';
 import Icon from 'flavours/glitch/components/icon';
 import Avatar from 'flavours/glitch/components/avatar';
 import Button from 'flavours/glitch/components/button';
-import { shortNumberFormat } from 'flavours/glitch/util/numbers';
 import { NavLink } from 'react-router-dom';
 import DropdownMenuContainer from 'flavours/glitch/containers/dropdown_menu_container';
 import AccountNoteContainer from '../containers/account_note_container';
diff --git a/app/javascript/flavours/glitch/features/directory/components/account_card.js b/app/javascript/flavours/glitch/features/directory/components/account_card.js
index 557120960..2ef9d5ba4 100644
--- a/app/javascript/flavours/glitch/features/directory/components/account_card.js
+++ b/app/javascript/flavours/glitch/features/directory/components/account_card.js
@@ -11,8 +11,14 @@ import RelativeTimestamp from 'flavours/glitch/components/relative_timestamp';
 import IconButton from 'flavours/glitch/components/icon_button';
 import { FormattedMessage, injectIntl, defineMessages } from 'react-intl';
 import { autoPlayGif, me, unfollowModal } from 'flavours/glitch/util/initial_state';
-import { shortNumberFormat } from 'flavours/glitch/util/numbers';
-import { followAccount, unfollowAccount, blockAccount, unblockAccount, unmuteAccount } from 'flavours/glitch/actions/accounts';
+import ShortNumber from 'flavours/glitch/components/short_number';
+import {
+  followAccount,
+  unfollowAccount,
+  blockAccount,
+  unblockAccount,
+  unmuteAccount,
+} from 'flavours/glitch/actions/accounts';
 import { openModal } from 'flavours/glitch/actions/modal';
 import { initMuteModal } from 'flavours/glitch/actions/mutes';
 
@@ -22,7 +28,10 @@ const messages = defineMessages({
   requested: { id: 'account.requested', defaultMessage: 'Awaiting approval' },
   unblock: { id: 'account.unblock', defaultMessage: 'Unblock @{name}' },
   unmute: { id: 'account.unmute', defaultMessage: 'Unmute @{name}' },
-  unfollowConfirm: { id: 'confirmations.unfollow.confirm', defaultMessage: 'Unfollow' },
+  unfollowConfirm: {
+    id: 'confirmations.unfollow.confirm',
+    defaultMessage: 'Unfollow',
+  },
 });
 
 const makeMapStateToProps = () => {
@@ -36,15 +45,25 @@ const makeMapStateToProps = () => {
 };
 
 const mapDispatchToProps = (dispatch, { intl }) => ({
-
-  onFollow (account) {
-    if (account.getIn(['relationship', 'following']) || account.getIn(['relationship', 'requested'])) {
+  onFollow(account) {
+    if (
+      account.getIn(['relationship', 'following']) ||
+      account.getIn(['relationship', 'requested'])
+    ) {
       if (unfollowModal) {
-        dispatch(openModal('CONFIRM', {
-          message: <FormattedMessage id='confirmations.unfollow.message' defaultMessage='Are you sure you want to unfollow {name}?' values={{ name: <strong>@{account.get('acct')}</strong> }} />,
-          confirm: intl.formatMessage(messages.unfollowConfirm),
-          onConfirm: () => dispatch(unfollowAccount(account.get('id'))),
-        }));
+        dispatch(
+          openModal('CONFIRM', {
+            message: (
+              <FormattedMessage
+                id='confirmations.unfollow.message'
+                defaultMessage='Are you sure you want to unfollow {name}?'
+                values={{ name: <strong>@{account.get('acct')}</strong> }}
+              />
+            ),
+            confirm: intl.formatMessage(messages.unfollowConfirm),
+            onConfirm: () => dispatch(unfollowAccount(account.get('id'))),
+          }),
+        );
       } else {
         dispatch(unfollowAccount(account.get('id')));
       }
@@ -53,7 +72,7 @@ const mapDispatchToProps = (dispatch, { intl }) => ({
     }
   },
 
-  onBlock (account) {
+  onBlock(account) {
     if (account.getIn(['relationship', 'blocking'])) {
       dispatch(unblockAccount(account.get('id')));
     } else {
@@ -61,17 +80,17 @@ const mapDispatchToProps = (dispatch, { intl }) => ({
     }
   },
 
-  onMute (account) {
+  onMute(account) {
     if (account.getIn(['relationship', 'muting'])) {
       dispatch(unmuteAccount(account.get('id')));
     } else {
       dispatch(initMuteModal(account));
     }
   },
-
 });
 
-export default @injectIntl
+export default
+@injectIntl
 @connect(makeMapStateToProps, mapDispatchToProps)
 class AccountCard extends ImmutablePureComponent {
 
@@ -83,7 +102,7 @@ class AccountCard extends ImmutablePureComponent {
     onMute: PropTypes.func.isRequired,
   };
 
-  _updateEmojis () {
+  _updateEmojis() {
     const node = this.node;
 
     if (!node || autoPlayGif) {
@@ -104,68 +123,113 @@ class AccountCard extends ImmutablePureComponent {
     }
   }
 
-  componentDidMount () {
+  componentDidMount() {
     this._updateEmojis();
   }
 
-  componentDidUpdate () {
+  componentDidUpdate() {
     this._updateEmojis();
   }
 
   handleEmojiMouseEnter = ({ target }) => {
     target.src = target.getAttribute('data-original');
-  }
+  };
 
   handleEmojiMouseLeave = ({ target }) => {
     target.src = target.getAttribute('data-static');
-  }
+  };
 
   handleFollow = () => {
     this.props.onFollow(this.props.account);
-  }
+  };
 
   handleBlock = () => {
     this.props.onBlock(this.props.account);
-  }
+  };
 
   handleMute = () => {
     this.props.onMute(this.props.account);
-  }
+  };
 
   setRef = (c) => {
     this.node = c;
-  }
+  };
 
-  render () {
+  render() {
     const { account, intl } = this.props;
 
     let buttons;
 
-    if (account.get('id') !== me && account.get('relationship', null) !== null) {
+    if (
+      account.get('id') !== me &&
+      account.get('relationship', null) !== null
+    ) {
       const following = account.getIn(['relationship', 'following']);
       const requested = account.getIn(['relationship', 'requested']);
-      const blocking  = account.getIn(['relationship', 'blocking']);
-      const muting    = account.getIn(['relationship', 'muting']);
+      const blocking = account.getIn(['relationship', 'blocking']);
+      const muting = account.getIn(['relationship', 'muting']);
 
       if (requested) {
-        buttons = <IconButton disabled icon='hourglass' title={intl.formatMessage(messages.requested)} />;
+        buttons = (
+          <IconButton
+            disabled
+            icon='hourglass'
+            title={intl.formatMessage(messages.requested)}
+          />
+        );
       } else if (blocking) {
-        buttons = <IconButton active icon='unlock' title={intl.formatMessage(messages.unblock, { name: account.get('username') })} onClick={this.handleBlock} />;
+        buttons = (
+          <IconButton
+            active
+            icon='unlock'
+            title={intl.formatMessage(messages.unblock, {
+              name: account.get('username'),
+            })}
+            onClick={this.handleBlock}
+          />
+        );
       } else if (muting) {
-        buttons = <IconButton active icon='volume-up' title={intl.formatMessage(messages.unmute, { name: account.get('username') })} onClick={this.handleMute} />;
+        buttons = (
+          <IconButton
+            active
+            icon='volume-up'
+            title={intl.formatMessage(messages.unmute, {
+              name: account.get('username'),
+            })}
+            onClick={this.handleMute}
+          />
+        );
       } else if (!account.get('moved') || following) {
-        buttons = <IconButton icon={following ? 'user-times' : 'user-plus'} title={intl.formatMessage(following ? messages.unfollow : messages.follow)} onClick={this.handleFollow} active={following} />;
+        buttons = (
+          <IconButton
+            icon={following ? 'user-times' : 'user-plus'}
+            title={intl.formatMessage(
+              following ? messages.unfollow : messages.follow,
+            )}
+            onClick={this.handleFollow}
+            active={following}
+          />
+        );
       }
     }
 
     return (
       <div className='directory__card'>
         <div className='directory__card__img'>
-          <img src={autoPlayGif ? account.get('header') : account.get('header_static')} alt='' />
+          <img
+            src={
+              autoPlayGif ? account.get('header') : account.get('header_static')
+            }
+            alt=''
+          />
         </div>
 
         <div className='directory__card__bar'>
-          <Permalink className='directory__card__bar__name' href={account.get('url')} to={`/accounts/${account.get('id')}`}>
+          <Permalink
+            className='directory__card__bar__name'
+            href={account.get('url')}
+            to={`/accounts/${account.get('id')}`}
+          >
             <Avatar account={account} size={48} />
             <DisplayName account={account} />
           </Permalink>
@@ -176,13 +240,44 @@ class AccountCard extends ImmutablePureComponent {
         </div>
 
         <div className='directory__card__extra' ref={this.setRef}>
-          <div className='account__header__content' dangerouslySetInnerHTML={{ __html: account.get('note_emojified') }} />
+          <div
+            className='account__header__content'
+            dangerouslySetInnerHTML={{ __html: account.get('note_emojified') }}
+          />
         </div>
 
         <div className='directory__card__extra'>
-          <div className='accounts-table__count'>{shortNumberFormat(account.get('statuses_count'))} <small><FormattedMessage id='account.posts' defaultMessage='Toots' /></small></div>
-          <div className='accounts-table__count'>{account.get('followers_count') < 0 ? '-' : shortNumberFormat(account.get('followers_count'))} <small><FormattedMessage id='account.followers' defaultMessage='Followers' /></small></div>
-          <div className='accounts-table__count'>{account.get('last_status_at') === null ? <FormattedMessage id='account.never_active' defaultMessage='Never' /> : <RelativeTimestamp timestamp={account.get('last_status_at')} />} <small><FormattedMessage id='account.last_status' defaultMessage='Last active' /></small></div>
+          <div className='accounts-table__count'>
+            <ShortNumber value={account.get('statuses_count')} />
+            <small>
+              <FormattedMessage id='account.posts' defaultMessage='Toots' />
+            </small>
+          </div>
+          <div className='accounts-table__count'>
+            {account.get('followers_count') < 0 ? '-' : <ShortNumber value={account.get('followers_count')} />}{' '}
+            <small>
+              <FormattedMessage
+                id='account.followers'
+                defaultMessage='Followers'
+              />
+            </small>
+          </div>
+          <div className='accounts-table__count'>
+            {account.get('last_status_at') === null ? (
+              <FormattedMessage
+                id='account.never_active'
+                defaultMessage='Never'
+              />
+            ) : (
+              <RelativeTimestamp timestamp={account.get('last_status_at')} />
+            )}{' '}
+            <small>
+              <FormattedMessage
+                id='account.last_status'
+                defaultMessage='Last active'
+              />
+            </small>
+          </div>
         </div>
       </div>
     );
diff --git a/app/javascript/flavours/glitch/util/numbers.js b/app/javascript/flavours/glitch/util/numbers.js
index af18dcfdd..6f2505cae 100644
--- a/app/javascript/flavours/glitch/util/numbers.js
+++ b/app/javascript/flavours/glitch/util/numbers.js
@@ -1,16 +1,71 @@
-import React, { Fragment } from 'react';
-import { FormattedNumber } from 'react-intl';
-
-export const shortNumberFormat = number => {
-  if (number < 1000) {
-    return <FormattedNumber value={number} />;
-  } else if (number < 10000) {
-    return <Fragment><FormattedNumber value={number / 1000} maximumFractionDigits={1} />K</Fragment>;
-  } else if (number < 1000000) {
-    return <Fragment><FormattedNumber value={number / 1000} maximumFractionDigits={0} />K</Fragment>;
-  } else if (number < 10000000) {
-    return <Fragment><FormattedNumber value={number / 1000000} maximumFractionDigits={1} />M</Fragment>;
-  } else {
-    return <Fragment><FormattedNumber value={number / 1000000} maximumFractionDigits={0} />M</Fragment>;
+// @ts-check
+
+export const DECIMAL_UNITS = Object.freeze({
+  ONE: 1,
+  TEN: 10,
+  HUNDRED: Math.pow(10, 2),
+  THOUSAND: Math.pow(10, 3),
+  MILLION: Math.pow(10, 6),
+  BILLION: Math.pow(10, 9),
+  TRILLION: Math.pow(10, 12),
+});
+
+const TEN_THOUSAND = DECIMAL_UNITS.THOUSAND * 10;
+const TEN_MILLIONS = DECIMAL_UNITS.MILLION * 10;
+
+/**
+ * @typedef {[number, number, number]} ShortNumber
+ * Array of: shorten number, unit of shorten number and maximum fraction digits
+ */
+
+/**
+ * @param {number} sourceNumber Number to convert to short number
+ * @returns {ShortNumber} Calculated short number
+ * @example
+ * shortNumber(5936);
+ * // => [5.936, 1000, 1]
+ */
+export function toShortNumber(sourceNumber) {
+  if (sourceNumber < DECIMAL_UNITS.THOUSAND) {
+    return [sourceNumber, DECIMAL_UNITS.ONE, 0];
+  } else if (sourceNumber < DECIMAL_UNITS.MILLION) {
+    return [
+      sourceNumber / DECIMAL_UNITS.THOUSAND,
+      DECIMAL_UNITS.THOUSAND,
+      sourceNumber < TEN_THOUSAND ? 1 : 0,
+    ];
+  } else if (sourceNumber < DECIMAL_UNITS.BILLION) {
+    return [
+      sourceNumber / DECIMAL_UNITS.MILLION,
+      DECIMAL_UNITS.MILLION,
+      sourceNumber < TEN_MILLIONS ? 1 : 0,
+    ];
+  } else if (sourceNumber < DECIMAL_UNITS.TRILLION) {
+    return [
+      sourceNumber / DECIMAL_UNITS.BILLION,
+      DECIMAL_UNITS.BILLION,
+      0,
+    ];
   }
-};
+
+  return [sourceNumber, DECIMAL_UNITS.ONE, 0];
+}
+
+/**
+ * @param {number} sourceNumber Original number that is shortened
+ * @param {number} division The scale in which short number is displayed
+ * @returns {number} Number that can be used for plurals when short form used
+ * @example
+ * pluralReady(1793, DECIMAL_UNITS.THOUSAND)
+ * // => 1790
+ */
+export function pluralReady(sourceNumber, division) {
+  // eslint-disable-next-line eqeqeq
+  if (division == null || division < DECIMAL_UNITS.HUNDRED) {
+    return sourceNumber;
+  }
+
+  let closestScale = division / DECIMAL_UNITS.TEN;
+
+  return Math.trunc(sourceNumber / closestScale) * closestScale;
+}