Refactor packages to have more idiomatic code base

ui/form/subscription.go

@@ -0,0 +1,42 @@
+// Copyright 2017 Frédéric Guillot. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package form
+
+import (
+	"net/http"
+	"strconv"
+
+	"github.com/miniflux/miniflux/errors"
+)
+
+// SubscriptionForm represents the subscription form.
+type SubscriptionForm struct {
+	URL        string
+	CategoryID int64
+	Crawler    bool
+}
+
+// Validate makes sure the form values are valid.
+func (s *SubscriptionForm) Validate() error {
+	if s.URL == "" || s.CategoryID == 0 {
+		return errors.NewLocalizedError("The URL and the category are mandatory.")
+	}
+
+	return nil
+}
+
+// NewSubscriptionForm returns a new SubscriptionForm.
+func NewSubscriptionForm(r *http.Request) *SubscriptionForm {
+	categoryID, err := strconv.Atoi(r.FormValue("category_id"))
+	if err != nil {
+		categoryID = 0
+	}
+
+	return &SubscriptionForm{
+		URL:        r.FormValue("url"),
+		Crawler:    r.FormValue("crawler") == "1",
+		CategoryID: int64(categoryID),
+	}
+}