91 lines
2.0 KiB
Go
91 lines
2.0 KiB
Go
package database
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import (
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"context"
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"fmt"
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"github.com/jackc/pgx/v5/pgtype"
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"github.com/TelegramExchange/tgex-parser/internal/domain"
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"github.com/TelegramExchange/tgex-parser/pkg/transaction"
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)
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func (d *Database) GetTrackedPosts(ctx context.Context, channel domain.Channel) ([]domain.Post, error) {
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query := `SELECT DISTINCT
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p.id,
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p.channel_id,
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p.message_id,
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p.text,
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CASE
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WHEN c.username IS NOT NULL THEN CONCAT('https://t.me/', c.username, '/', p.message_id)
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ELSE ''
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END as link,
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COALESCE(
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(SELECT pvh.views_count
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FROM post_views_history pvh
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WHERE pvh.post_id = p.id
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ORDER BY pvh.fetched_at DESC
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LIMIT 1),
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0
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) as views
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FROM post p
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INNER JOIN channel c ON c.id = p.channel_id
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INNER JOIN placement_post pp ON pp.post_id = p.id
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WHERE p.channel_id = $1
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AND p.deleted_from_channel_at IS NULL;`
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txOrPool := transaction.TryExtractTX(ctx)
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rows, err := txOrPool.Query(ctx, query, pgtype.UUID{Bytes: channel.ID, Valid: true})
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if err != nil {
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return nil, fmt.Errorf("txOrPool.Query: %w", err)
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}
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defer rows.Close()
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posts := make([]domain.Post, 0)
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for rows.Next() {
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var dto getTrackedPostsDTO
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err = rows.Scan(dto.destination()...)
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if err != nil {
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return nil, fmt.Errorf("rows.Scan: %w", err)
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}
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posts = append(posts, dto.toDomain())
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}
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return posts, nil
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}
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type getTrackedPostsDTO struct {
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ID pgtype.UUID
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ChannelID pgtype.UUID
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MessageID pgtype.Int4
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Text pgtype.Text
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Link pgtype.Text
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Views pgtype.Int4
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}
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func (dto *getTrackedPostsDTO) destination() []any {
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return []any{
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&dto.ID,
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&dto.ChannelID,
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&dto.MessageID,
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&dto.Text,
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&dto.Link,
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&dto.Views,
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}
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}
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func (dto *getTrackedPostsDTO) toDomain() domain.Post {
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return domain.Post{
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ID: dto.ID.Bytes,
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ChannelID: dto.ChannelID.Bytes,
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MessageID: int(dto.MessageID.Int32),
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Text: dto.Text.String,
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Link: dto.Link.String,
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Views: int(dto.Views.Int32),
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}
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}
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