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tag.go
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tag.go
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package store
import (
"context"
"database/sql"
"github.com/caris-events/tunalog/entity"
)
type Tag struct {
ID string
Slug string
Name string
Description string
CreatedAt int64
}
func createTagTable() error {
_, err := Instance.db.Exec(`
CREATE TABLE IF NOT EXISTS tags (
id TEXT NOT NULL PRIMARY KEY,
slug TEXT NOT NULL,
name TEXT NOT NULL,
description TEXT NOT NULL,
created_at INTEGER NOT NULL
)
`)
return err
}
func createPostTagTable() error {
_, err := Instance.db.Exec(`
CREATE TABLE IF NOT EXISTS post_tags (
tag_id TEXT NOT NULL,
post_id TEXT NOT NULL,
PRIMARY KEY (tag_id, post_id)
)
`)
return err
}
// ListTags
func (s *Store) ListTags(c context.Context, offset, limit int, keyword string) ([]*entity.TagR, error) {
var rows *sql.Rows
var err error
if keyword != "" {
rows, err = s.db.Query(`SELECT t.id, t.slug, t.name, t.description, t.created_at, COUNT(pt.post_id) AS post_count FROM tags t LEFT JOIN post_tags pt ON t.id = pt.tag_id WHERE name LIKE ? GROUP BY t.id, t.slug, t.name, t.description ORDER BY t.created_at DESC LIMIT ?, ?`, "%"+keyword+"%", offset, limit)
} else {
rows, err = s.db.Query(`SELECT t.id, t.slug, t.name, t.description, t.created_at, COUNT(pt.post_id) AS post_count FROM tags t LEFT JOIN post_tags pt ON t.id = pt.tag_id GROUP BY t.id, t.slug, t.name, t.description ORDER BY t.created_at DESC LIMIT ?, ?`, offset, limit)
}
if err != nil {
return nil, err
}
defer rows.Close()
var tags []*entity.TagR
for rows.Next() {
var t entity.TagR
if err := rows.Scan(&t.ID, &t.Slug, &t.Name, &t.Description, &t.CreatedAt, &t.PostCount); err != nil {
return nil, err
}
tags = append(tags, &t)
}
return tags, nil
}
// CountTags
func (s *Store) CountTags(c context.Context, keyword string) (int, error) {
var count int
if keyword != "" {
if err := s.db.QueryRow(`SELECT COUNT(*) FROM tags WHERE name LIKE ?`, "%"+keyword+"%").Scan(&count); err != nil {
return 0, err
}
} else {
if err := s.db.QueryRow(`SELECT COUNT(*) FROM tags`).Scan(&count); err != nil {
return 0, err
}
}
return count, nil
}
// CreateTag
func (s *Store) CreateTag(c context.Context, t *entity.TagW) error {
_, err := s.db.Exec(`INSERT INTO tags (id, slug, name, description, created_at) VALUES (?, ?, ?, ?, ?)`, t.ID, t.Slug, t.Name, t.Description, t.CreatedAt)
if err != nil {
return err
}
return nil
}
// UpdateTag
func (s *Store) UpdateTag(c context.Context, t *entity.TagW) error {
_, err := s.db.Exec(`UPDATE tags SET slug = ?, name = ?, description = ?, created_at = ? WHERE id = ?`, t.Slug, t.Name, t.Description, t.CreatedAt, t.ID)
if err != nil {
return err
}
return nil
}
// ListTagsByPost
func (s *Store) ListTagsByPost(c context.Context, id string) ([]*entity.TagR, error) {
rows, err := s.db.Query(`SELECT t.id, t.slug, t.name, t.description, t.created_at FROM tags t JOIN post_tags pt ON t.id = pt.tag_id WHERE pt.post_id = ?`, id)
if err != nil {
return nil, err
}
defer rows.Close()
var tags []*entity.TagR
for rows.Next() {
var t entity.TagR
if err := rows.Scan(&t.ID, &t.Slug, &t.Name, &t.Description, &t.CreatedAt); err != nil {
return nil, err
}
tags = append(tags, &t)
}
return tags, nil
}
// GetTag
func (s *Store) GetTag(c context.Context, id string) (*entity.TagR, error) {
var t entity.TagR
if err := s.db.QueryRow(`SELECT t.id, t.slug, t.name, t.description, t.created_at, COUNT(pt.post_id) AS post_count FROM tags t LEFT JOIN post_tags pt ON t.id = pt.tag_id WHERE t.id = ? GROUP BY t.id, t.slug, t.name, t.description`, id).Scan(&t.ID, &t.Slug, &t.Name, &t.Description, &t.CreatedAt, &t.PostCount); err != nil {
return nil, err
}
return &t, nil
}
// DeleteTag
func (s *Store) DeleteTag(id string) error {
_, err := s.db.Exec(`DELETE FROM post_tags WHERE tag_id = ?`, id) // implicit linking table
if err != nil {
return err
}
_, err = s.db.Exec(`DELETE FROM tags WHERE id = ?`, id)
if err != nil {
return err
}
return nil
}
// GetTagsByName
func (s *Store) GetTagsByName(names []string) ([]*entity.TagR, error) {
var args []interface{}
q := "SELECT id, slug, name, description, created_at FROM tags WHERE name IN ("
for i := 0; i < len(names); i++ {
q += "?"
args = append(args, names[i])
if i < len(names)-1 {
q += ","
}
}
q += ")"
rows, err := s.db.Query(q, args...)
if err != nil {
return nil, err
}
defer rows.Close()
var tags []*entity.TagR
for rows.Next() {
var t entity.TagR
if err := rows.Scan(&t.ID, &t.Slug, &t.Name, &t.Description, &t.CreatedAt); err != nil {
return nil, err
}
tags = append(tags, &t)
}
return tags, nil
}