web コンテナの土台を追加（HTTP サーバー、TVer API クライアント、htmx の画面枠、Dockerfile・compose.yaml）

internal/web/handler.go

@@ -0,0 +1,43 @@
+package web
+
+import (
+	"embed"
+	"html/template"
+	"io/fs"
+	"net/http"
+)
+
+//go:embed templates/*.html static/*
+var assets embed.FS
+
+type page struct {
+	Title string
+}
+
+func NewHandler() http.Handler {
+	tmpl := template.Must(template.ParseFS(assets, "templates/*.html"))
+	staticFiles, err := fs.Sub(assets, "static")
+	if err != nil {
+		panic(err)
+	}
+	mux := http.NewServeMux()
+	mux.Handle("GET /static/", http.StripPrefix("/static/", http.FileServerFS(staticFiles)))
+	mux.HandleFunc("GET /healthz", func(w http.ResponseWriter, _ *http.Request) {
+		w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+		_, _ = w.Write([]byte("ok\n"))
+	})
+	for path, title := range map[string]string{
+		"GET /{$}":           "新着",
+		"GET /queue":         "待ち行列",
+		"GET /subscriptions": "登録番組",
+		"GET /library":       "ライブラリ",
+	} {
+		mux.HandleFunc(path, func(w http.ResponseWriter, _ *http.Request) {
+			w.Header().Set("Content-Type", "text/html; charset=utf-8")
+			if err := tmpl.ExecuteTemplate(w, "layout", page{Title: title}); err != nil {
+				http.Error(w, "template error", http.StatusInternalServerError)
+			}
+		})
+	}
+	return mux
+}