Isomorphic form functionality.

basicform.go

+// The Isomorphic Go Project
+// Copyright (c) Wirecog, LLC. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license, which can be found in the LICENSE file.
+
+package isokit
+
+import "strings"
+
+type BasicForm struct {
+	formParams *FormParams
+
+	autofillFields []string
+	fields         map[string]string
+	errors         map[string]string
+}
+
+func (c *BasicForm) AutofillFields() []string {
+	return c.autofillFields
+}
+
+func (c *BasicForm) Fields() map[string]string {
+	return c.fields
+}
+
+func (c *BasicForm) Errors() map[string]string {
+	return c.errors
+}
+
+func (c *BasicForm) FormParams() *FormParams {
+	return c.formParams
+
+}
+
+func (c *BasicForm) SetAutofillFields(autofillFields []string) {
+	c.autofillFields = autofillFields
+}
+
+func (c *BasicForm) SetFields(fields map[string]string) {
+	c.fields = fields
+}
+
+func (c *BasicForm) SetErrors(errors map[string]string) {
+	c.errors = errors
+}
+
+func (c *BasicForm) SetFormParams(formParams *FormParams) {
+	c.formParams = formParams
+}
+
+func (c *BasicForm) SetError(key string, message string) {
+	c.errors[key] = message
+}
+
+func (c *BasicForm) ClearErrors() {
+	c.errors = make(map[string]string)
+}
+
+func (c *BasicForm) PopulateFields() {
+	for _, fieldName := range c.autofillFields {
+		c.fields[fieldName] = FormValue(c.FormParams(), fieldName)
+	}
+}
+
+func (c *BasicForm) DisplayErrors() {
+	if OperatingEnvironment() == WebBrowserEnvironment && c.formParams.FormElement != nil {
+		errorSpans := c.formParams.FormElement.QuerySelectorAll(".formError")
+		for _, v := range errorSpans {
+			v.SetInnerHTML(c.errors[strings.Replace(v.GetAttribute("id"), "Error", "", -1)])
+		}
+	}
+}

form.go

+// The Isomorphic Go Project
+// Copyright (c) Wirecog, LLC. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license, which can be found in the LICENSE file.
+
+package isokit
+
+import (
+	"net/http"
+
+	"honnef.co/go/js/dom"
+)
+
+type Form interface {
+	Validate() bool
+	AutofillFields() []string
+	Fields() map[string]string
+	Errors() map[string]string
+	//	SetError(key string, message string)
+}
+
+type FormParams struct {
+	ResponseWriter http.ResponseWriter
+	Request        *http.Request
+	FormElement    *dom.HTMLFormElement
+}
+
+func FormValue(fp *FormParams, key string) string {
+
+	var result string
+
+	if OperatingEnvironment() == ServerEnvironment && fp.Request == nil {
+		return ""
+	}
+
+	switch OperatingEnvironment() {
+
+	case ServerEnvironment:
+		result = fp.Request.FormValue(key)
+
+	case WebBrowserEnvironment:
+
+		field := fp.FormElement.QuerySelector("[name=" + key + "]")
+
+		switch field.(type) {
+		case *dom.HTMLInputElement:
+			result = field.(*dom.HTMLInputElement).Value
+		case *dom.HTMLTextAreaElement:
+			result = field.(*dom.HTMLTextAreaElement).Value
+		case *dom.HTMLSelectElement:
+			result = field.(*dom.HTMLSelectElement).Value
+
+		}
+	}
+
+	return result
+}