feat: publish the Sandwich Hime source preview

Signed-off-by: Cole Speelman <gamertan@noreply.localhost>

examples/eql-shaped/cmd/example/main.go

@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: 0BSD
+
+package main
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"fmt"
+	"net/http"
+	"os"
+	"time"
+
+	"example.com/eql-shaped/views"
+	"gamertan.com/sandwich-hime/sando"
+)
+
+func main() {
+	address := os.Getenv("HIMESAN_LISTEN_ADDR")
+	if address != "" {
+		serve(address)
+		return
+	}
+
+	output, err := renderPage(context.Background())
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+	_, _ = output.WriteTo(os.Stdout)
+}
+
+func serve(address string) {
+	mux := http.NewServeMux()
+	mux.HandleFunc("GET /healthz", func(response http.ResponseWriter, _ *http.Request) {
+		response.Header().Set("Content-Type", "text/plain; charset=utf-8")
+		response.WriteHeader(http.StatusOK)
+		_, _ = response.Write([]byte("ok\n"))
+	})
+	mux.HandleFunc("GET /", func(response http.ResponseWriter, request *http.Request) {
+		output, err := renderPage(request.Context())
+		if err != nil {
+			http.Error(response, "render failed", http.StatusInternalServerError)
+			return
+		}
+		response.Header().Set("Content-Type", "text/html; charset=utf-8")
+		response.Header().Set("Content-Security-Policy", "default-src 'none'; style-src 'self'")
+		response.WriteHeader(http.StatusOK)
+		_, _ = output.WriteTo(response)
+	})
+
+	server := &http.Server{Addr: address, Handler: mux, ReadHeaderTimeout: 5 * time.Second}
+	if err := server.ListenAndServe(); !errors.Is(err, http.ErrServerClosed) {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+
+func renderPage(ctx context.Context) (*bytes.Buffer, error) {
+	body := views.Home(views.HomeView{
+		Heading: "EQL-shaped records",
+		Intro:   "Typed markup without making the template compiler your web framework.",
+		Browse: views.BrowseView{
+			Query: "pioneer & archivist",
+			Records: []views.RecordView{
+				{URL: "/items/1?from=home&kind=book", Title: "A <field> guide", Kind: "book", Featured: true},
+				{URL: "/items/2", Title: "Community memory", Kind: "archive"},
+			},
+		},
+	})
+
+	page := views.Layout(views.LayoutView{
+		SiteName: "EQL Wiki Fixture",
+		Title:    "Home",
+		Body:     body,
+	})
+
+	var output bytes.Buffer
+	if err := sando.Render(ctx, &output, page); err != nil {
+		return nil, err
+	}
+	return &output, nil
+}