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import { _x } from '@wordpress/i18n'

const DEFAULT_MAX_CHARS = 150

export const toCamelCase = (text: string): string =>
	text.replace(/-(?<letter>[a-z])/g, (_, letter: string) => letter.toUpperCase())

export const trimLeadingChar = (text: string, characters: string): string =>
	characters.includes(text.charAt(0)) ? text.slice(1) : text

export const trimTrailingChar = (text: string, characters: string): string =>
	characters.includes(text.charAt(text.length - 1)) ? text.slice(0, -1) : text

export const truncateChars = (text: string, chars = DEFAULT_MAX_CHARS): string =>
	text.length > chars
		? `${text.slice(0, chars)}${_x('…', 'truncated text', 'code-snippets')}`
		: text

export const truncateWords = (text: string, wordCount: number): string => {
	const words = text.trim().split(/\s+/)

	return words.length > wordCount
		? `${words.slice(0, wordCount).join(' ')}${_x('…', 'truncated text', 'code-snippets')}`
		: text
}

export const stripTags = (text: string): string => {
	const document = new DOMParser().parseFromString(text, 'text/html')
	const blockSelector = 'p,div,li,br,h1,h2,h3,h4,h5,h6,tr,td,th,ul,ol,blockquote,table,pre,hr,' +
		'dl,dt,dd,section,article,header,footer,figure,figcaption,' +
		'address,aside,nav,main,fieldset,form,details,summary,dialog,hgroup,caption'

	document.body.querySelectorAll('script,style').forEach(element => element.remove())
	document.body
		.querySelectorAll(blockSelector)
		.forEach(element => element.after(document.createTextNode(' ')))

	return (document.body.textContent ?? '').replace(/\s+/g, ' ').trim()
}