Server-side form validation 1

internal/forms/errors.go

@@ -0,0 +1,18 @@
+package forms
+
+type errors map[string][]string
+
+// Add adds an error message for a given form field
+func (e errors) Add(field, message string) {
+	e[field] = append(e[field], message)
+}
+
+// Get returns the first error message
+func (e errors) Get(field string) string {
+	es := e[field]
+
+	if len(es) == 0 {
+		return ""
+	}
+	return es[0]
+}

internal/forms/forms.go

@@ -0,0 +1,26 @@
+package forms
+
+import (
+	"net/http"
+	"net/url"
+)
+
+// Form creates a custom form struct, embeds a url.Values object
+type Form struct {
+	url.Values
+	Errors errors
+}
+
+// New initializes a form struct
+func New(data url.Values) *Form {
+	return &Form{
+		data,
+		errors(map[string][]string{}),
+	}
+}
+
+// Has checks if form field is in post and not emtpy
+func (f *Form) Has(field string, r *http.Request) bool {
+	x := r.Form.Get(field)
+	return x != ""
+}