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27 lines
959 B
Go
27 lines
959 B
Go
package web
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import (
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"fmt"
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"html"
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"regexp"
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"strings"
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)
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// From http://daringfireball.net/2010/07/improved_regex_for_matching_urls
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var urlRE = regexp.MustCompile("(?i)\\b((?:[a-z][\\w-]+:(?:/{1,3}|[a-z0-9%])|www\\d{0,3}[.]|[a-z0-9.\\-]+[.][a-z]{2,4}/)(?:[^\\s()<>]+|\\(([^\\s()<>]+|(\\([^\\s()<>]+\\)))*\\))+(?:\\(([^\\s()<>]+|(\\([^\\s()<>]+\\)))*\\)|[^\\s`!()\\[\\]{};:'\".,<>?«»“”‘’]))")
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// TextToHTML takes plain text, escapes it and tries to pretty it up for
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// HTML display
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func TextToHTML(text string) string {
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text = html.EscapeString(text)
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text = urlRE.ReplaceAllStringFunc(text, WrapURL)
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replacer := strings.NewReplacer("\r\n", "<br/>\n", "\r", "<br/>\n", "\n", "<br/>\n")
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return replacer.Replace(text)
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}
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// WrapURL wraps a <a href> tag around the provided URL
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func WrapURL(url string) string {
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unescaped := strings.ReplaceAll(url, "&", "&")
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return fmt.Sprintf("<a href=\"%s\" target=\"_blank\">%s</a>", unescaped, url)
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}
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