[validate.go] Refactored invalid repository result page into message

Closes #66

Instead of error page will be displayed error message on the same screen.

Author: pavelsne

internal/resources/templates/pubvalidate.go

@@ -8,6 +8,9 @@ var PubValidate = `
 				Enter the full name of a GIN repository (user/repository) below and select a validator to run:
 			</h4>
 			<div class="ui attached segment">
+			{{ if .ErrorMessage }}
+				<div class="ui message red">{{ .ErrorMessage }}</div>
+			{{ end }}
 				<div class="required inline field left">
 					<label for="repopath">Repository name</label>
 					<input id="repopath" name="repopath" value="" autofocus required>

internal/web/validate.go

@@ -505,6 +505,13 @@ func Root(w http.ResponseWriter, r *http.Request) {
 // to manually run a validator on a publicly accessible repository, without
 // using a web hook.
 func PubValidateGet(w http.ResponseWriter, r *http.Request) {
+	renderValidationForm(w, r, "")
+}
+
+// renderValidationForm renders the one-time validation form, which allows the user
+// to manually run a validator on a publicly accessible repository, without
+// using a web hook.
+func renderValidationForm(w http.ResponseWriter, r *http.Request, errMsg string) {
 	tmpl := template.New("layout")
 	tmpl, err := tmpl.Parse(templates.Layout)
 	if err != nil {
@@ -521,11 +528,13 @@ func PubValidateGet(w http.ResponseWriter, r *http.Request) {
 	year, _, _ := time.Now().Date()
 	srvcfg := config.Read()
 	data := struct {
-		GinURL      string
-		CurrentYear int
+		GinURL       string
+		CurrentYear  int
+		ErrorMessage string
 	}{
 		srvcfg.GINAddresses.WebURL,
 		year,
+		errMsg,
 	}
 	tmpl.Execute(w, &data)
 }
@@ -560,7 +569,7 @@ func PubValidatePost(w http.ResponseWriter, r *http.Request) {
 	// check if repository is accessible
 	repoinfo, err := gcl.GetRepo(repopath)
 	if err != nil {
-		fail(w, http.StatusNotFound, err.Error())
+		renderValidationForm(w, r, fmt.Sprintf("Repository '%s' does not exist.", repopath))
 		return
 	}
 	if repoinfo.Private {