Send mailing list emails

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

pkg/server/mailactions/render.go

@@ -0,0 +1,45 @@
+// Copyright (c) 2025 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package mailactions
+
+import (
+	_ "embed"
+	"html/template"
+	"net/http"
+)
+
+//go:embed templates/page.html.tmpl
+var pageTmplHTML string
+
+type form struct {
+	ActionURL template.URL
+	Button    string
+	Danger    bool
+}
+
+type page struct {
+	Title   string
+	Heading string
+	Body    string
+	Form    *form
+}
+
+var tmpl = template.Must(template.New("page.html.tmpl").Parse(pageTmplHTML))
+
+func renderPage(w http.ResponseWriter, status int, p page) {
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	w.WriteHeader(status)
+	_ = tmpl.Execute(w, p)
+}