Add optional sort option in category page

closes #1552

model/categories_sort_options.go

@@ -0,0 +1,13 @@
+// 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 model // import "miniflux.app/model"
+
+// HomePages returns the list of available home pages.
+func CategoriesSortOptions() map[string]string {
+	return map[string]string{
+		"unread_count": "form.prefs.select.unread_count",
+		"alphabetical": "form.prefs.select.alphabetical",
+	}
+}

model/user.go

@@ -33,6 +33,7 @@ type User struct {
 	DefaultReadingSpeed int        `json:"default_reading_speed"`
 	CJKReadingSpeed     int        `json:"cjk_reading_speed"`
 	DefaultHomePage     string     `json:"default_home_page"`
+	CategoriesSortOrder string     `json:"categories_sort_order"`
 }
 
 // UserCreationRequest represents the request to create a user.
@@ -65,6 +66,7 @@ type UserModificationRequest struct {
 	DefaultReadingSpeed *int    `json:"default_reading_speed"`
 	CJKReadingSpeed     *int    `json:"cjk_reading_speed"`
 	DefaultHomePage     *string `json:"default_home_page"`
+	CategoriesSortOrder *string `json:"categories_sort_order"`
 }
 
 // Patch updates the User object with the modification request.
@@ -144,6 +146,10 @@ func (u *UserModificationRequest) Patch(user *User) {
 	if u.DefaultHomePage != nil {
 		user.DefaultHomePage = *u.DefaultHomePage
 	}
+
+	if u.CategoriesSortOrder != nil {
+		user.CategoriesSortOrder = *u.CategoriesSortOrder
+	}
 }
 
 // UseTimezone converts last login date to the given timezone.