toshiki-notebook/docs/.vitepress/theme/utils/pageInfo.ts

// utility features of getting documentation page details for extrating page metadata for use of pageinfo component under doc title
import type { PageInfo } from '../types'

export function getWords(content: string): RegExpMatchArray | null {
    return content.match(/[\w\d\s,.\u00C0-\u024F\u0400-\u04FF]+/giu)
}

export function getChinese(content: string): RegExpMatchArray | null {
    return content.match(/[\u4E00-\u9FD5]/gu)
}

export function getEnWordCount(content: string): number {
    return (
        getWords(content)?.reduce<number>(
            (accumulator, word) => accumulator + (word.trim() === '' ? 0 : word.trim().split(/\s+/u).length),
            0
        ) || 0
    )
}

export function getCnWordCount(content: string): number {
    return getChinese(content)?.length || 0
}

export function getWordNumber(content: string): number {
    return getEnWordCount(content) + getCnWordCount(content)
}

export function getReadingTime(content: string, cnWordPerMinute = 350, enwordPerMinute = 160): PageInfo {
    const count = getWordNumber(content || '')
    const words = count >= 1000 ? `${Math.round(count / 100) / 10}k` : count

    const enWord = getEnWordCount(content)
    const cnWord = getCnWordCount(content)

    const readingTime = cnWord / cnWordPerMinute + enWord / enwordPerMinute
    const readTime = readingTime < 1 ? '1' : Number.parseInt(`${readingTime}`, 10)

    return {
        readTime,
        words,
    }
}