30 lines
1.0 KiB
Go
30 lines
1.0 KiB
Go
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package barertc
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import (
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"fmt"
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"regexp"
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)
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// Media regexps
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var (
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ytLinkRegexp = regexp.MustCompile(`(?:youtube(?:-nocookie)?\.com/(?:[^/]+/.+/|(?:v|e(?:mbed)?)/|.*[?&]v=)|youtu\.be/)([^"&?/\s]{11})`)
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ytIdRegexp = regexp.MustCompile(`[0-9A-Za-z_-]{10}[048AEIMQUYcgkosw]`) // YT ID validator
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)
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// YT embed template
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const youtubeEmbedTemplate = `<iframe class="youtube-embed" width="560" height="315" src="https://www.youtube.com/embed/%s" title="YouTube video player" frameborder="0" allow="autoplay; encrypted-media; picture-in-picture; web-share" allowfullscreen></iframe>`
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// ExpandMedia detects media URLs such as YouTube videos and stylizes the message up with embeds.
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func (s *Server) ExpandMedia(message string) string {
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// YouTube links.
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if m := ytLinkRegexp.FindStringSubmatch(message); len(m) > 0 {
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var ytid = m[1]
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// Sanity check the ID parsed OK (e.g. multiple youtube links can throw it off)
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if ytIdRegexp.Match([]byte(ytid)) {
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message += fmt.Sprintf(youtubeEmbedTemplate, ytid)
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}
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}
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return message
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}
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