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// 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"
)
type BatchBuilder struct {
db *sql.DB
args []any
conditions []string
limit int
}
func (s *Storage) NewBatchBuilder() *BatchBuilder {
return &BatchBuilder{
db: s.db,
}
}
func (b *BatchBuilder) WithBatchSize(batchSize int) *BatchBuilder {
b.limit = batchSize
return b
}
func (b *BatchBuilder) WithUserID(userID int64) *BatchBuilder {
b.conditions = append(b.conditions, fmt.Sprintf("user_id = $%d", len(b.args)+1))
b.args = append(b.args, userID)
return b
}
func (b *BatchBuilder) WithCategoryID(categoryID int64) *BatchBuilder {
b.conditions = append(b.conditions, fmt.Sprintf("category_id = $%d", len(b.args)+1))
b.args = append(b.args, categoryID)
return b
}
func (b *BatchBuilder) WithErrorLimit(limit int) *BatchBuilder {
if limit > 0 {
b.conditions = append(b.conditions, fmt.Sprintf("parsing_error_count < $%d", len(b.args)+1))
b.args = append(b.args, limit)
}
return b
}
func (b *BatchBuilder) WithNextCheckExpired() *BatchBuilder {
b.conditions = append(b.conditions, "next_check_at < now()")
return b
}
func (b *BatchBuilder) WithoutDisabledFeeds() *BatchBuilder {
b.conditions = append(b.conditions, "disabled is false")
return b
}
func (b *BatchBuilder) FetchJobs() (jobs model.JobList, err error) {
var parts []string
parts = append(parts, `SELECT id, user_id FROM feeds`)
if len(b.conditions) > 0 {
parts = append(parts, fmt.Sprintf("WHERE %s", strings.Join(b.conditions, " AND ")))
}
if b.limit > 0 {
parts = append(parts, fmt.Sprintf("ORDER BY next_check_at ASC LIMIT %d", b.limit))
}
query := strings.Join(parts, " ")
rows, err := b.db.Query(query, b.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
}
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