First pass at basic functionality.

This PR introduces the beginnings of Sprint Padawan.

Reviewed-on: #1

main.go

@@ -0,0 +1,82 @@
+package main
+
+import (
+	"compress/gzip"
+	"embed"
+	"io"
+	"log"
+	"net/http"
+	"path/filepath"
+	"regexp"
+	"strings"
+
+	"github.com/joho/godotenv"
+
+	"sprintpadawan/api"
+	"sprintpadawan/lib"
+)
+
+type gzipResponseWriter struct {
+	io.Writer
+	http.ResponseWriter
+}
+
+var fingerprintPattern = regexp.MustCompile(`[-.][a-f0-9]{8,}\.`)
+
+func (w gzipResponseWriter) Write(b []byte) (int, error) {
+	return w.Writer.Write(b)
+}
+
+func gzipMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if !strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
+			next.ServeHTTP(w, r)
+			return
+		}
+
+		w.Header().Set("Content-Encoding", "gzip")
+		w.Header().Set("Vary", "Accept-Encoding")
+
+		gz := gzip.NewWriter(w)
+		defer gz.Close()
+
+		gzw := gzipResponseWriter{Writer: gz, ResponseWriter: w}
+		next.ServeHTTP(gzw, r)
+	})
+}
+
+func cacheMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if fingerprintPattern.MatchString(filepath.Base(r.URL.Path)) {
+			w.Header().Set("Cache-Control", "public, max-age=31536000, immutable")
+		} else {
+			w.Header().Set("Cache-Control", "public, max-age=3600")
+		}
+		next.ServeHTTP(w, r)
+	})
+}
+
+//go:embed static templates
+var embeddedFiles embed.FS
+
+func main() {
+	// load .env file if it exists
+	_ = godotenv.Load()
+
+	lib.InitDB()
+	api.InitTemplates(embeddedFiles)
+
+	mux := http.NewServeMux()
+
+	// serve static assets
+	staticHandler := http.FileServer(http.FS(embeddedFiles))
+	mux.Handle("/static/", cacheMiddleware(gzipMiddleware(staticHandler)))
+
+	api.SetupRoutes(mux)
+
+	addr := ":8080"
+	log.Printf("Starting SprintPadawan server on http://localhost%s", addr)
+	if err := http.ListenAndServe(addr, mux); err != nil {
+		log.Fatalf("server error: %v", err)
+	}
+}