Move internal packages to an internal folder

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

internal/storage/job.go

@@ -0,0 +1,81 @@
+// SPDX-FileCopyrightText: Copyright The Miniflux Authors. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+package storage // import "miniflux.app/v2/internal/storage"
+
+import (
+	"fmt"
+
+	"miniflux.app/v2/internal/config"
+	"miniflux.app/v2/internal/model"
+)
+
+// NewBatch returns a series of jobs.
+func (s *Storage) NewBatch(batchSize int) (jobs model.JobList, err error) {
+	pollingParsingErrorLimit := config.Opts.PollingParsingErrorLimit()
+	query := `
+		SELECT
+			id,
+			user_id
+		FROM
+			feeds
+		WHERE
+			disabled is false AND next_check_at < now() AND 
+			CASE WHEN $1 > 0 THEN parsing_error_count < $1 ELSE parsing_error_count >= 0 END
+		ORDER BY next_check_at ASC LIMIT $2
+	`
+	return s.fetchBatchRows(query, pollingParsingErrorLimit, batchSize)
+}
+
+// NewUserBatch returns a series of jobs but only for a given user.
+func (s *Storage) NewUserBatch(userID int64, batchSize int) (jobs model.JobList, err error) {
+	// We do not take the error counter into consideration when the given
+	// user refresh manually all his feeds to force a refresh.
+	query := `
+		SELECT
+			id,
+			user_id
+		FROM
+			feeds
+		WHERE
+			user_id=$1 AND disabled is false
+		ORDER BY next_check_at ASC LIMIT %d
+	`
+	return s.fetchBatchRows(fmt.Sprintf(query, batchSize), userID)
+}
+
+// NewCategoryBatch returns a series of jobs but only for a given category.
+func (s *Storage) NewCategoryBatch(userID int64, categoryID int64, batchSize int) (jobs model.JobList, err error) {
+	// We do not take the error counter into consideration when the given
+	// user refresh manually all his feeds to force a refresh.
+	query := `
+		SELECT
+			id,
+			user_id
+		FROM
+			feeds
+		WHERE
+			user_id=$1 AND category_id=$2 AND disabled is false
+		ORDER BY next_check_at ASC LIMIT %d
+	`
+	return s.fetchBatchRows(fmt.Sprintf(query, batchSize), userID, categoryID)
+}
+
+func (s *Storage) fetchBatchRows(query string, args ...interface{}) (jobs model.JobList, err error) {
+	rows, err := s.db.Query(query, args...)
+	if err != nil {
+		return nil, fmt.Errorf(`store: unable to fetch batch of jobs: %v`, err)
+	}
+	defer rows.Close()
+
+	for rows.Next() {
+		var job model.Job
+		if err := rows.Scan(&job.FeedID, &job.UserID); err != nil {
+			return nil, fmt.Errorf(`store: unable to fetch job: %v`, err)
+		}
+
+		jobs = append(jobs, job)
+	}
+
+	return jobs, nil
+}