api: Add go files

I know this is a huge commit, but I can't be bothered to check
this in part by part.

api/router_static.go

@@ -0,0 +1,69 @@
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/gorilla/mux"
+	"html/template"
+	"io/ioutil"
+	"net/http"
+	"os"
+)
+
+func redirectLogin(w http.ResponseWriter, r *http.Request) {
+	http.Redirect(w, r, "/login", 301)
+}
+
+type staticHtmlPlugs struct {
+	CdnPrefix string
+}
+
+func initStaticRouter(router *mux.Router) error {
+	for _, path := range []string{"js", "css", "images"} {
+		router.PathPrefix("/" + path + "/").HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			f, err := os.Stat("." + r.URL.Path)
+			if err != nil || f.IsDir() {
+				http.NotFound(w, r)
+			}
+
+			http.ServeFile(w, r, "."+r.URL.Path)
+		})
+	}
+
+	pages := []string{
+		"login",
+		"signup",
+		"dashboard",
+		"account",
+	}
+
+	html := make(map[string]string)
+	for _, page := range pages {
+		contents, err := ioutil.ReadFile(page + ".html")
+		if err != nil {
+			logger.Errorf("cannot read file %s.html: %v", page, err)
+			return err
+		}
+
+		t, err := template.New(page).Parse(string(contents))
+		if err != nil {
+			logger.Errorf("cannot parse %s.html template: %v", page, err)
+			return err
+		}
+
+		var buf bytes.Buffer
+		t.Execute(&buf, &staticHtmlPlugs{CdnPrefix: os.Getenv("CDN_PREFIX")})
+
+		html[page] = buf.String()
+	}
+
+	for _, page := range pages {
+		router.HandleFunc("/"+page, func(w http.ResponseWriter, r *http.Request) {
+			fmt.Fprintf(w, html[page])
+		})
+	}
+
+	router.HandleFunc("/", redirectLogin).Methods("GET")
+
+	return nil
+}