1 files changed, 110 insertions, 0 deletions
diff --git a/page/page.go b/page/page.go
new file mode 100644
index 0000000..c58a344
--- /dev/null
+++ b/page/page.go
@@ -0,0 +1,110 @@
+package page
+
+import (
+	"os"
+	"io/fs"
+	"errors"
+	"path/filepath"
+	"net/http"
+	"sanine.net/git/phlox/config"
+)
+
+
+type Pages struct {
+	Login string
+	LoggedIn string
+	Error404 string
+	Error500 string
+}
+
+
+func (p Pages) ServeLogin(w http.ResponseWriter) {
+	w.Write([]byte(p.Login))
+}
+
+
+func (p Pages) ServeLoggedIn(w http.ResponseWriter) {
+	w.Write([]byte(p.LoggedIn))
+}
+
+
+func (p Pages) ServeError404(w http.ResponseWriter) {
+	w.WriteHeader(http.StatusNotFound)
+	w.Write([]byte(p.Error404))
+}
+
+
+func (p Pages) ServeError500(w http.ResponseWriter) {
+	w.WriteHeader(http.StatusInternalServerError)
+	w.Write([]byte(p.Error500))
+}
+
+
+type DefaultPage func() (string, error)
+
+
+func fileExists(filename string) (bool, error) {
+	_, err := os.Stat(filename)
+	if err == nil {
+		return true, nil
+	} else if errors.Is(err, fs.ErrNotExist) {
+		return false, nil
+	} else {
+		// unknown error
+		return false, err
+	}
+}
+
+
+func loadPage(c config.Config, filename string, fallback DefaultPage) (string, error) {
+	fullPath := filepath.Join(c.AssetDirectory, filename)
+	exist, err := fileExists(fullPath)
+	if err != nil {
+		return "", err
+	}
+
+	if exist {
+		bytes, err := os.ReadFile(fullPath)
+		if err != nil {
+			return "", err
+		}
+		return string(bytes), nil
+	} else {
+		// file does not exist
+		// use built-in
+		str, err := fallback()
+		if err != nil {
+			return "", err
+		}
+		return str, nil
+	}
+}
+
+
+func LoadPages(c config.Config) (Pages, error) {
+	var pages Pages
+	var err error
+
+	pages.Login, err = loadPage(c, "login.html", DefaultLogin)
+	if err != nil {
+		return Pages{}, err
+	}
+
+	pages.LoggedIn, err = loadPage(c, "logged_in.html", DefaultLoggedIn)
+	if err != nil {
+		return Pages{}, err
+	}
+
+
+	pages.Error404, err = loadPage(c, "404.html", DefaultError404)
+	if err != nil {
+		return Pages{}, err
+	}
+
+	pages.Error500, err = loadPage(c, "500.html", DefaultError500)
+	if err != nil {
+		return Pages{}, err
+	}
+
+	return pages, nil
+}