Move internal packages to an internal folder

For reference: https://go.dev/doc/go1.4#internalpackages

internal/storage/icon.go

@@ -0,0 +1,159 @@
+// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+package storage // import "miniflux.app/v2/internal/storage"
+
+import (
+	"database/sql"
+	"fmt"
+	"strings"
+
+	"miniflux.app/v2/internal/model"
+)
+
+// HasIcon checks if the given feed has an icon.
+func (s *Storage) HasIcon(feedID int64) bool {
+	var result bool
+	query := `SELECT true FROM feed_icons WHERE feed_id=$1`
+	s.db.QueryRow(query, feedID).Scan(&result)
+	return result
+}
+
+// IconByID returns an icon by the ID.
+func (s *Storage) IconByID(iconID int64) (*model.Icon, error) {
+	var icon model.Icon
+	query := `SELECT id, hash, mime_type, content FROM icons WHERE id=$1`
+	err := s.db.QueryRow(query, iconID).Scan(&icon.ID, &icon.Hash, &icon.MimeType, &icon.Content)
+	if err == sql.ErrNoRows {
+		return nil, nil
+	} else if err != nil {
+		return nil, fmt.Errorf("Unable to fetch icon by hash: %v", err)
+	}
+
+	return &icon, nil
+}
+
+// IconByFeedID returns a feed icon.
+func (s *Storage) IconByFeedID(userID, feedID int64) (*model.Icon, error) {
+	query := `
+		SELECT
+			icons.id,
+			icons.hash,
+			icons.mime_type,
+			icons.content
+		FROM icons
+		LEFT JOIN feed_icons ON feed_icons.icon_id=icons.id
+		LEFT JOIN feeds ON feeds.id=feed_icons.feed_id
+		WHERE
+			feeds.user_id=$1 AND feeds.id=$2
+		LIMIT 1
+	`
+	var icon model.Icon
+	err := s.db.QueryRow(query, userID, feedID).Scan(&icon.ID, &icon.Hash, &icon.MimeType, &icon.Content)
+	if err != nil {
+		return nil, fmt.Errorf(`store: unable to fetch icon: %v`, err)
+	}
+
+	return &icon, nil
+}
+
+// IconByHash returns an icon by the hash (checksum).
+func (s *Storage) IconByHash(icon *model.Icon) error {
+	err := s.db.QueryRow(`SELECT id FROM icons WHERE hash=$1`, icon.Hash).Scan(&icon.ID)
+	if err == sql.ErrNoRows {
+		return nil
+	} else if err != nil {
+		return fmt.Errorf(`store: unable to fetch icon by hash: %v`, err)
+	}
+
+	return nil
+}
+
+// CreateIcon creates a new icon.
+func (s *Storage) CreateIcon(icon *model.Icon) error {
+	query := `
+		INSERT INTO icons
+			(hash, mime_type, content)
+		VALUES
+			($1, $2, $3)
+		RETURNING
+			id
+	`
+	err := s.db.QueryRow(
+		query,
+		icon.Hash,
+		normalizeMimeType(icon.MimeType),
+		icon.Content,
+	).Scan(&icon.ID)
+
+	if err != nil {
+		return fmt.Errorf(`store: unable to create icon: %v`, err)
+	}
+
+	return nil
+}
+
+// CreateFeedIcon creates an icon and associate the icon to the given feed.
+func (s *Storage) CreateFeedIcon(feedID int64, icon *model.Icon) error {
+	err := s.IconByHash(icon)
+	if err != nil {
+		return err
+	}
+
+	if icon.ID == 0 {
+		err := s.CreateIcon(icon)
+		if err != nil {
+			return err
+		}
+	}
+
+	_, err = s.db.Exec(`INSERT INTO feed_icons (feed_id, icon_id) VALUES ($1, $2)`, feedID, icon.ID)
+	if err != nil {
+		return fmt.Errorf(`store: unable to create feed icon: %v`, err)
+	}
+
+	return nil
+}
+
+// Icons returns all icons that belongs to a user.
+func (s *Storage) Icons(userID int64) (model.Icons, error) {
+	query := `
+		SELECT
+			icons.id,
+			icons.hash,
+			icons.mime_type,
+			icons.content
+		FROM icons
+		LEFT JOIN feed_icons ON feed_icons.icon_id=icons.id
+		LEFT JOIN feeds ON feeds.id=feed_icons.feed_id
+		WHERE
+			feeds.user_id=$1
+	`
+	rows, err := s.db.Query(query, userID)
+	if err != nil {
+		return nil, fmt.Errorf(`store: unable to fetch icons: %v`, err)
+	}
+	defer rows.Close()
+
+	var icons model.Icons
+	for rows.Next() {
+		var icon model.Icon
+		err := rows.Scan(&icon.ID, &icon.Hash, &icon.MimeType, &icon.Content)
+		if err != nil {
+			return nil, fmt.Errorf(`store: unable to fetch icons row: %v`, err)
+		}
+		icons = append(icons, &icon)
+	}
+
+	return icons, nil
+}
+
+func normalizeMimeType(mimeType string) string {
+	mimeType = strings.ToLower(mimeType)
+	switch mimeType {
+	case "image/png", "image/jpeg", "image/jpg", "image/webp", "image/svg+xml", "image/x-icon", "image/gif":
+		return mimeType
+	default:
+		return "image/x-icon"
+	}
+}