Refactor: change number of return parameters from page functions, include error handling in wrapper

errors.go

@@ -10,7 +10,6 @@
 package main
 
 import (
-	"errors"
 	"net/http"
 
 	"git.erbosoft.com/amy/amsterdam/ui"
@@ -19,7 +18,10 @@ import (
 )
 
 // ENOPERM is the standard "not permitted" error message.
-var ENOPERM error = errors.New("you are not permitted to perform this operation")
+var ENOPERM *echo.HTTPError = echo.NewHTTPError(http.StatusForbidden, "you are not permitted to perform this operation")
+
+// ENOACCESS is the standard "no access" error message.
+var ENOACCESS *echo.HTTPError = echo.NewHTTPError(http.StatusForbidden, "you are not permitted to access this page")
 
 /* NotImplPage is used for all TODO links, to show that something hasn't yet been implemented.
  * Parameters:
@@ -29,11 +31,11 @@ var ENOPERM error = errors.New("you are not permitted to perform this operation"
  *     Data as a parameter for the command string.
  *     Standard Go error status.
  */
-func NotImplPage(ctxt ui.AmContext) (string, any, error) {
+func NotImplPage(ctxt ui.AmContext) (string, any) {
 	ctxt.SetLeftMenu("top")
 	ctxt.VarMap().Set("amsterdam_pageTitle", "Function Not Implemented")
 	ctxt.VarMap().Set("path", ctxt.URLPath())
-	return "framed_template", "notimpl.jet", nil
+	return "framed", "notimpl.jet"
 }
 
 /* AmErrorHandler handles all the mundane HTTP errors generated by the Echo engine.