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news_sources.go
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/
news_sources.go
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package traderdb
import (
"context"
"github.com/jackc/pgx/v4/pgxpool"
)
type NewsSource struct {
Id string
Name string
Description string
}
const userNewsSourcesQuery = `
SELECT ns.id, ns.name, ns.description FROM user_news_sources uns
INNER JOIN news_sources ns ON ns.id = uns.news_source_id
WHERE uns.user_id = $1
`
func GetNewsSourcesByUserId(db *pgxpool.Pool, userId int) (newsSources []NewsSource, err error) {
rows, err := db.Query(context.Background(), userNewsSourcesQuery, userId)
if err != nil {
return newsSources, err
}
defer rows.Close()
for rows.Next() {
var id string
var name string
var description string
if err = rows.Scan(&id, &name, &description); err != nil {
return newsSources, err
}
newsSources = append(newsSources, NewsSource{
Id: id,
Name: name,
Description: description,
})
}
if rows.Err() != nil {
return newsSources, rows.Err()
}
return newsSources, err
}
func GetNewsSourceIdsByUserId(db *pgxpool.Pool, userId int) (newsSourceIds []string, err error) {
newsSources, err := GetNewsSourcesByUserId(db, userId)
if err != nil {
return newsSourceIds, err
}
for _, newsSource := range newsSources {
newsSourceIds = append(newsSourceIds, newsSource.Id)
}
return newsSourceIds, nil
}