Add currentUser template func

templates/tailwind.gohtml

@@ -16,12 +16,15 @@
           <a class="text-base font-semibold hover:text-blue-100 pr-8" href="/faq">FAQ</a>
         </div>
         <div class="space-x-4">
+         {{if currentUser }}
           <form action="/signout" method="post" class="inline pr-4">
             {{csrfField}}
             <button type="submit">Sign out</button>
           </form>
+         {{else}}
           <a href="/signin">Sign in</a>
           <a href="/signup" clss="px-4 py-2 bg-blue-700 hover:bg-blue-600 rounded">Sign up</a>
+         {{end}}
         </div>
       </nav>
     </header>

views/template.go

@@ -11,6 +11,8 @@ import (
 	"os"
 	"strings"
 
+	userctx "git.kealoha.me/lks/lenslocked/context"
+	"git.kealoha.me/lks/lenslocked/models"
 	"github.com/gorilla/csrf"
 )
 
@@ -28,6 +30,7 @@ func (t Template) Execute(w http.ResponseWriter, r *http.Request, data interface
 
 	tpl = tpl.Funcs(template.FuncMap{
 		"csrfField":   func() template.HTML { return csrf.TemplateField(r) },
+		"currentUser": func() *models.User { return userctx.User(r.Context()) },
 	})
 
 	w.Header().Set("Content-Type", "text/html; charset=utf8")
@@ -40,6 +43,7 @@ func (t Template) Execute(w http.ResponseWriter, r *http.Request, data interface
 	}
 	io.Copy(w, &buf)
 }
+
 func (t Template) TestTemplate(data interface{}) error {
 	var testWriter strings.Builder
 	tpl, err := t.htmlTpl.Clone()
@@ -50,6 +54,9 @@ func (t Template) TestTemplate(data interface{}) error {
 		"csrfField": func() template.HTML {
 			return `<div class="hidden">STUB: PLACEHOLDER</div>`
 		},
+		"currentUser": func() *models.User {
+			return &models.User{ID: 0, Email: "a@a"}
+		},
 	})
 	return tpl.Execute(&testWriter, data)
 }
@@ -62,7 +69,10 @@ func FromFS(fs fs.FS, pattern ...string) (Template, error) {
 	tpl := template.New(pattern[0])
 	tpl = tpl.Funcs(template.FuncMap{
 		"csrfField": func() (template.HTML, error) {
-			return `<div class="hidden">STUB: PLACEHOLDER</div>`, fmt.Errorf("csrfField Not Implimented")
+			return "", fmt.Errorf("csrfField Not Implimented")
+		},
+		"currentUser": func() (*models.User, error) {
+			return nil, fmt.Errorf("currentUser Not Implimented")
 		},
 	})
 	tpl, err := tpl.ParseFS(fs, pattern...)