парсер

tg_parser/internal/adapter/database/get_channels.go

@@ -0,0 +1,79 @@
+package database
+
+import (
+	"context"
+
+	"github.com/jackc/pgx/v5/pgtype"
+	"github.com/rs/zerolog/log"
+
+	"github.com/TelegramExchange/tgex-parser/internal/domain"
+	"github.com/TelegramExchange/tgex-parser/pkg/transaction"
+)
+
+func (d *Database) GetChannels(ctx context.Context) []domain.Channel {
+	query := `SELECT
+    id,
+    telegram_id,
+    username,
+    title,
+    access_hash,
+    pts
+FROM channel
+WHERE deleted_at IS NULL;`
+
+	txOrPool := transaction.TryExtractTX(ctx)
+
+	rows, err := txOrPool.Query(ctx, query)
+	if err != nil {
+		log.Error().Err(err).Msg("txOrPool.Query failed")
+		return []domain.Channel{}
+	}
+	defer rows.Close()
+
+	channels := make([]domain.Channel, 0)
+
+	for rows.Next() {
+		var dto getChannelsDTO
+
+		err = rows.Scan(dto.destination()...)
+		if err != nil {
+			log.Error().Err(err).Msg("rows.Scan failed")
+			return []domain.Channel{}
+		}
+
+		channels = append(channels, dto.toDomain())
+	}
+
+	return channels
+}
+
+type getChannelsDTO struct {
+	ID         pgtype.UUID
+	TelegramID pgtype.Int8
+	Username   pgtype.Text
+	Title      pgtype.Text
+	AccessHash pgtype.Int8
+	Pts        pgtype.Int4
+}
+
+func (dto *getChannelsDTO) destination() []any {
+	return []any{
+		&dto.ID,
+		&dto.TelegramID,
+		&dto.Username,
+		&dto.Title,
+		&dto.AccessHash,
+		&dto.Pts,
+	}
+}
+
+func (dto *getChannelsDTO) toDomain() domain.Channel {
+	return domain.Channel{
+		ID:         dto.ID.Bytes,
+		TelegramID: domain.NormalizeChatID(dto.TelegramID.Int64),
+		Username:   dto.Username.String,
+		Title:      dto.Title.String,
+		AccessHash: dto.AccessHash.Int64,
+		Pts:        int(dto.Pts.Int32),
+	}
+}