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import type { FC, ReactNode } from 'react';
import { useIntl } from 'react-intl';
import type { PageLink } from '../../../../types';
import { getReadingTimeFrom } from '../../../../utils/helpers';
import { Link, Time, VisuallyHidden } from '../../../atoms';
import {
CardMeta,
type MetaItemData,
type CardMetaProps,
} from '../../../molecules';
const a11y = (chunks: ReactNode) => <VisuallyHidden>{chunks}</VisuallyHidden>;
export type PostPreviewMetaComment = {
/**
* The number of comments.
*/
count: number;
/**
* The post heading (used to generate an accessible label).
*/
postHeading: string;
/**
* An url to the comments section.
*/
url?: string;
};
export type PostPreviewMetaData = {
/**
* The author name.
*/
author?: string;
/**
* The number of comments on the post and eventually an url to read them.
*/
comments?: PostPreviewMetaComment;
/**
* The publication date of the post.
*/
publicationDate?: string;
/**
* The thematics attached to the post.
*/
thematics?: PageLink[];
/**
* The topics attached to the post.
*/
topics?: PageLink[];
/**
* The last modification date of the post.
*/
updateDate?: string;
/**
* The number of words in the post.
*/
wordsCount?: number;
};
const validMetaKeys = [
'author',
'comments',
'publicationDate',
'thematics',
'topics',
'updateDate',
'wordsCount',
] satisfies (keyof PostPreviewMetaData)[];
const isValidMetaKey = (key: string): key is keyof PostPreviewMetaData =>
(validMetaKeys as string[]).includes(key);
export type PostPreviewMetaProps = Omit<CardMetaProps, 'items'> & {
/**
* The post meta.
*/
meta: PostPreviewMetaData;
};
export const PostPreviewMeta: FC<PostPreviewMetaProps> = ({
meta,
...props
}) => {
const intl = useIntl();
const getAuthor = (): MetaItemData | undefined => {
if (!meta.author) return undefined;
return {
id: 'author',
label: intl.formatMessage({
defaultMessage: 'Written by:',
description: 'PostPreviewMeta: author label',
id: '2U7ixo',
}),
value: meta.author,
};
};
const getCommentsCount = (): MetaItemData | undefined => {
if (!meta.comments) return undefined;
const commentsLabel = intl.formatMessage<ReactNode>(
{
defaultMessage:
'{commentsCount, plural, =0 {No comments} one {# comment} other {# comments}}<a11y> about {title}</a11y>',
description: 'PostPreviewMeta: comments count',
id: 'NfAn9N',
},
{
a11y,
commentsCount: meta.comments.count,
title: meta.comments.postHeading,
}
);
return {
id: 'comments',
label: intl.formatMessage({
defaultMessage: 'Comments:',
description: 'PostPreviewMeta: comments label',
id: 'FCpPCm',
}),
value: meta.comments.url ? (
<Link href={meta.comments.url}>{commentsLabel}</Link>
) : (
<>{commentsLabel}</>
),
};
};
const getPublicationDate = (): MetaItemData | undefined => {
if (!meta.publicationDate) return undefined;
return {
id: 'publication-date',
label: intl.formatMessage({
defaultMessage: 'Published on:',
description: 'PostPreviewMeta: publication date label',
id: '+6f4p1',
}),
value: <Time date={meta.publicationDate} />,
};
};
const getThematics = (): MetaItemData | undefined => {
if (!meta.thematics?.length) return undefined;
return {
id: 'thematics',
label: intl.formatMessage(
{
defaultMessage:
'{thematicsCount, plural, =0 {Thematics:} one {Thematic:} other {Thematics:}}',
description: 'PostPreviewMeta: thematics label',
id: '9MTBCG',
},
{ thematicsCount: meta.thematics.length }
),
value: meta.thematics.map((thematic) => {
return {
id: `thematic-${thematic.id}`,
value: <Link href={thematic.url}>{thematic.name}</Link>,
};
}),
};
};
const getTopics = (): MetaItemData | undefined => {
if (!meta.topics?.length) return undefined;
return {
id: 'topics',
label: intl.formatMessage(
{
defaultMessage:
'{topicsCount, plural, =0 {Topics:} one {Topic:} other {Topics:}}',
description: 'PostPreviewMeta: topics label',
id: 'aBQYbE',
},
{ topicsCount: meta.topics.length }
),
value: meta.topics.map((topic) => {
return {
id: `topic-${topic.id}`,
value: <Link href={topic.url}>{topic.name}</Link>,
};
}),
};
};
const getUpdateDate = (): MetaItemData | undefined => {
if (!meta.updateDate || meta.updateDate === meta.publicationDate)
return undefined;
return {
id: 'update-date',
label: intl.formatMessage({
defaultMessage: 'Updated on:',
description: 'PostPreviewMeta: update date label',
id: 'ZmRh0V',
}),
value: <Time date={meta.updateDate} />,
};
};
const getReadingTime = (): MetaItemData | undefined => {
if (!meta.wordsCount) return undefined;
return {
id: 'reading-time',
label: intl.formatMessage({
defaultMessage: 'Reading time:',
description: 'PostPreviewMeta: reading time label',
id: 'B1lS/v',
}),
value: intl.formatMessage(
{
defaultMessage:
'{minutesCount, plural, =0 {Less than one minute} one {# minute} other {# minutes}}',
description: 'PostPreviewMeta: rounded minutes count',
id: 'y+13Ax',
},
{ minutesCount: getReadingTimeFrom(meta.wordsCount).inMinutes() }
),
};
};
const items: MetaItemData[] = Object.keys(meta)
.filter(isValidMetaKey)
.map((key): MetaItemData | undefined => {
switch (key) {
case 'author':
return getAuthor();
case 'comments':
return getCommentsCount();
case 'publicationDate':
return getPublicationDate();
case 'thematics':
return getThematics();
case 'topics':
return getTopics();
case 'updateDate':
return getUpdateDate();
case 'wordsCount':
return getReadingTime();
default:
throw new Error('Unsupported meta key.');
}
})
.filter((item): item is MetaItemData => item !== undefined);
return <CardMeta {...props} items={items} />;
};
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