elliotchance/gedcom

package core

import "io"

type GoogleAnalytics struct {
    id string
}

func NewGoogleAnalytics(id string) *GoogleAnalytics {
    return &GoogleAnalytics{
        id: id,
    }
}

func (c *GoogleAnalytics) WriteHTMLTo(w io.Writer) (int64, error) {
    if c.id == "" {
        return writeNothing()
    }

    return writeSprintf(w, `<!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=%s"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());

gtag('config', '%s');
</script>`, c.id, c.id)
}