Use vanilla HTTP handlers (refactoring)

ui/entry_prev_next.go

@@ -0,0 +1,36 @@
+// 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 ui
+
+import (
+	"github.com/miniflux/miniflux/model"
+	"github.com/miniflux/miniflux/storage"
+)
+
+func (c *Controller) getEntryPrevNext(user *model.User, builder *storage.EntryQueryBuilder, entryID int64) (prev *model.Entry, next *model.Entry, err error) {
+	builder.WithoutStatus(model.EntryStatusRemoved)
+	builder.WithOrder(model.DefaultSortingOrder)
+	builder.WithDirection(user.EntryDirection)
+
+	entries, err := builder.GetEntries()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	n := len(entries)
+	for i := 0; i < n; i++ {
+		if entries[i].ID == entryID {
+			if i-1 >= 0 {
+				prev = entries[i-1]
+			}
+
+			if i+1 < n {
+				next = entries[i+1]
+			}
+		}
+	}
+
+	return prev, next, nil
+}