2 files changed, 198 insertions, 0 deletions
diff --git a/page/default.go b/page/default.go
new file mode 100644
index 0000000..ea51acc
--- /dev/null
+++ b/page/default.go
@@ -0,0 +1,88 @@
+package page
+
+import (
+	"strings"
+	"text/template"
+)
+
+
+type page struct {
+	Title string
+	Body string
+}
+
+
+func buildPage(p page) (string, error) {
+	t, err := template.New("").Parse(`
+<!doctype html>
+<html>
+	<head>
+		<meta charset="utf-8">
+		<meta name="viewport" content="width=device-width, initial-scale=1">
+		<title>{{ .Title }}</title>
+	</head>
+	<body>
+		{{ .Body }}
+	</body>
+</html>
+	`)
+	if err != nil {
+		return "", err
+	}
+
+	var b strings.Builder
+
+	err = t.Execute(&b, p)
+	if err != nil {
+		return "", err
+	}
+
+	return b.String(), nil
+}
+
+
+func DefaultLogin() (string, error) {
+	return buildPage(page{
+		Title: "Login",
+		Body: `
+			<form method="post">
+				<label for="username">Username</label>
+				<input type="text" id="username" name="username">
+				<br>
+				<label for="password">Password</label>
+				<input type="text" id="password" name="password">
+				<br>
+				<input type="submit" value="Submit">
+			</form>
+		`,
+	})
+}
+
+
+func DefaultLoggedIn() (string, error) {
+	return buildPage(page{
+		Title: "Logged In",
+		Body: `
+			<h1>You are logged in.</h1>
+			<form method="get" action="/phlox/logout">
+				<input type="submit" value="Log Out">
+			</form>
+		`,
+	})
+}
+
+
+func DefaultError404() (string, error) {
+	return buildPage(page{
+		Title: "404 Not Found",
+		Body: "<h1>Error 404: Page not found</h1>",
+	})
+}
+
+
+func DefaultError500() (string, error) {
+	return buildPage(page{
+		Title: "500 Not Found",
+		Body: "<h1>Error 500: Page not found</h1>",
+	})
+}
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
+}