sinProject-Inc/talk

export class Urlify {
    public constructor(private readonly _text: string) {}

    private _escape_html(): string {
        const escaped_text = this._text.replace(/[&<>"']/g, (char) => {
            switch (char) {
                case '&':
                    return '&amp;'
                case '<':
                    return '&lt;'
                case '>':
                    return '&gt;'
                case '"':
                    return '&quot;'
                case "'":
                    return '&#039;'
                default:
                    return char
            }
        })

        return escaped_text
    }

    public replace(): string {
        const escaped_text = this._escape_html()
        const url_regex = /(?:https?:\/\/|www\.)[^\s]+/gi

        return escaped_text.replace(url_regex, (url) => {
            let new_url = url

            if (!url.startsWith('http') && !url.startsWith('https')) {
                if (url.includes('www.')) {
                    new_url = `https://${url}`
                } else {
                    new_url = `https://www.${url}`
                }
            }

            return `<a href="${new_url}" target="_blank" rel="noopener noreferrer">${url}</a>`
        })
    }
}