Add gemini CTA to HTTP pages

src/http/tpl.go

@@ -99,6 +99,9 @@ func (a *api) tplFuncs() template.FuncMap {
 		"DateTimeFormat": func(t time.Time) string {
 			return t.Format("2006-01-02")
 		},
+		"SafeURL": func(u string) template.URL {
+			return template.URL(u)
+		},
 	}
 }
 
@@ -123,6 +126,7 @@ func (a *api) mustParseTpl(name string) *template.Template {
 
 func (a *api) mustParseBasedTpl(name string) *template.Template {
 	tpl := a.mustParseTpl(name)
+	tpl = template.Must(tpl.New("gemini-cta.html").Parse(mustReadTplFile("gemini-cta.html")))
 	tpl = template.Must(tpl.New("base.html").Parse(mustReadTplFile("base.html")))
 	return tpl
 }
@@ -131,15 +135,19 @@ type tplData struct {
 	Payload interface{}
 }
 
+func newTPLData(r *http.Request, payload interface{}) tplData {
+	return tplData{
+		Payload: payload,
+	}
+}
+
 // executeTemplate expects to be the final action in an http.Handler
 func executeTemplate(
 	rw http.ResponseWriter, r *http.Request,
 	tpl *template.Template, payload interface{},
 ) {
 
-	tplData := tplData{
-		Payload: payload,
-	}
+	tplData := newTPLData(r, payload)
 
 	if err := tpl.Execute(rw, tplData); err != nil {
 		apiutil.InternalServerError(
@@ -164,7 +172,10 @@ func (a *api) renderDumbTplHandler(tplName string) http.Handler {
 	tpl := a.mustParseBasedTpl(tplName)
 
 	return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
-		if err := tpl.Execute(rw, nil); err != nil {
+
+		tplData := newTPLData(r, nil)
+
+		if err := tpl.Execute(rw, tplData); err != nil {
 			apiutil.InternalServerError(
 				rw, r, fmt.Errorf("rendering %q: %w", tplName, err),
 			)

src/http/tpl/follow.html

@@ -145,6 +145,8 @@ emailSubscribe.onclick = async () => {
   </li>
 </ul>
 
+{{ template "gemini-cta.html" . }}
+
 {{ end }}
 
 {{ template "base.html" . }}

src/http/tpl/gemini-cta.html

@@ -0,0 +1,12 @@
+<hr/>
+
+<p>
+  This site can also be accessed via the gemini protocol:
+  <a href="{{ BlogGeminiURL "/" | SafeURL }}">
+    {{ BlogGeminiURL "/" }}
+  </a>
+</p>
+<p>
+  <a href="{{ PostURL "gemspace-tour" }}">What is gemini?</a>
+</p>
+

src/http/tpl/index.html

@@ -50,6 +50,8 @@
     <li><a href="https://yamakan.place/palestine/#">Radio alHara</a> is another great internet radio station.</li>
   </ul>
 
+  {{ template "gemini-cta.html" . }}
+
 {{ end }}
 
 {{ template "base.html" . }}

src/http/tpl/post.html

@@ -38,6 +38,8 @@
 </em></p>
 {{ end }}
 
+{{ template "gemini-cta.html" . }}
+
 {{ end }}
 
 {{ template "base.html" . }}

src/http/tpl/posts.html

@@ -30,6 +30,8 @@
   </p>
   {{ end }}
 
+  {{ template "gemini-cta.html" . }}
+
 {{ end }}
 
 {{ template "base.html" . }}