парсер

tg_parser/pkg/logger/logger.go

@@ -0,0 +1,36 @@
+package logger
+
+import (
+	"os"
+	"time"
+
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+)
+
+type Config struct {
+	Level         string `default:"info"          envconfig:"LOGGER__LEVEL"`
+	PrettyConsole bool   `default:"false"         envconfig:"LOGGER__PRETTY_CONSOLE"`
+}
+
+func Init(c Config) {
+	zerolog.TimeFieldFormat = time.RFC3339
+
+	level := zerolog.InfoLevel
+	if parsedLevel, err := zerolog.ParseLevel(c.Level); err == nil {
+		level = parsedLevel
+	}
+	zerolog.SetGlobalLevel(level)
+
+	log.Logger = log.With().
+		// Caller().
+		// Str("app_name", c.AppName).
+		// Str("app_version", c.AppVersion).
+		Logger()
+
+	if c.PrettyConsole {
+		log.Logger = log.Output(zerolog.ConsoleWriter{Out: os.Stderr, TimeFormat: "15:04:05"})
+	}
+
+	log.Info().Msg("Logger initialized")
+}

tg_parser/pkg/postgres/postgres.go

@@ -0,0 +1,37 @@
+package postgres
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+	"github.com/rs/zerolog/log"
+)
+
+type Config struct {
+	URL string `envconfig:"DB__URL" required:"true"`
+}
+
+type Pool struct {
+	*pgxpool.Pool
+}
+
+func New(ctx context.Context, c Config) (*Pool, error) {
+	cfg, err := pgxpool.ParseConfig(c.URL)
+	if err != nil {
+		return nil, fmt.Errorf("pgxpool.ParseConfig: %w", err)
+	}
+
+	pool, err := pgxpool.NewWithConfig(ctx, cfg)
+	if err != nil {
+		return nil, fmt.Errorf("pgxpool.NewWithConfig: %w", err)
+	}
+
+	return &Pool{Pool: pool}, nil
+}
+
+func (p *Pool) Close() {
+	p.Pool.Close()
+
+	log.Info().Msg("Postgres closed")
+}

tg_parser/pkg/telegram/telegram.go

@@ -0,0 +1,76 @@
+package telegram
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/rs/zerolog/log"
+
+	"github.com/gotd/td/session"
+	"github.com/gotd/td/telegram"
+)
+
+type Config struct {
+	ApiID       int    `envconfig:"TELEGRAM__API_ID"       required:"true"`
+	ApiHash     string `envconfig:"TELEGRAM__API_HASH"     required:"true"`
+	SessionFile string `envconfig:"TELEGRAM__SESSION_FILE" required:"true"`
+}
+
+type Client struct {
+	*telegram.Client
+	cancel context.CancelFunc
+	done   chan struct{}
+}
+
+func New(cfg Config) (*Client, error) {
+	ctx := context.Background()
+
+	tg := telegram.NewClient(cfg.ApiID, cfg.ApiHash, telegram.Options{
+		SessionStorage: &session.FileStorage{Path: cfg.SessionFile},
+	})
+
+	runCtx, cancel := context.WithCancel(ctx)
+
+	ready := make(chan struct{})
+	done := make(chan struct{})
+
+	client := &Client{
+		Client: tg,
+		cancel: cancel,
+		done:   done,
+	}
+
+	go func() {
+		err := tg.Run(runCtx, func(ctx context.Context) error {
+			status, err := tg.Auth().Status(ctx)
+			if err != nil {
+				close(ready)
+				return fmt.Errorf("telegram.Auth error: %w", err)
+			}
+			if !status.Authorized {
+				close(ready)
+				return fmt.Errorf("session not authorized")
+			}
+
+			close(ready)
+
+			<-ctx.Done()
+			return ctx.Err()
+		})
+
+		if err != nil {
+			log.Error().Err(err).Msg("telegram client stopped")
+		}
+
+		close(done)
+	}()
+
+	<-ready
+
+	return client, nil
+}
+
+func (c *Client) Close() {
+	c.cancel()
+	<-c.done
+}

tg_parser/pkg/transaction/transaction.go

@@ -0,0 +1,101 @@
+package transaction
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/TelegramExchange/tgex-parser/pkg/postgres"
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgconn"
+	"github.com/jackc/pgx/v5/pgxpool"
+	"github.com/rs/zerolog/log"
+)
+
+var (
+	errMissingInit  = errors.New("missing `transaction.Init' call before `transaction.Begin'")
+	errMissingBegin = errors.New("missing `transaction.Begin' call before 'transaction.Get'")
+)
+
+var (
+	pool       *pgxpool.Pool
+	IsUnitTest bool
+)
+
+type ctxKey struct{}
+
+func Init(p *postgres.Pool) {
+	pool = p.Pool
+}
+
+type Transaction struct {
+	pgx.Tx
+}
+
+func Begin(ctx context.Context) (context.Context, error) {
+	if IsUnitTest {
+		return ctx, nil
+	}
+
+	if pool == nil {
+		return nil, errMissingInit
+	}
+
+	tx, err := pool.Begin(ctx)
+	if err != nil {
+		return nil, fmt.Errorf("pool.Begin: %w", err)
+	}
+
+	ctx = context.WithValue(ctx, ctxKey{}, &Transaction{tx})
+
+	return ctx, nil
+}
+
+func Rollback(ctx context.Context) {
+	if IsUnitTest {
+		return
+	}
+
+	tx, ok := ctx.Value(ctxKey{}).(*Transaction)
+	if !ok {
+		return
+	}
+
+	err := tx.Rollback(ctx)
+	if err != nil && !errors.Is(err, pgx.ErrTxClosed) {
+		log.Error().Err(err).Msg("transaction: Rollback")
+	}
+}
+
+func Commit(ctx context.Context) error {
+	if IsUnitTest {
+		return nil
+	}
+
+	tx, ok := ctx.Value(ctxKey{}).(*Transaction)
+	if !ok {
+		return errMissingBegin
+	}
+
+	err := tx.Commit(ctx)
+	if err != nil {
+		return fmt.Errorf("tx.Commit: %w", err)
+	}
+
+	return nil
+}
+
+type Executor interface {
+	Exec(ctx context.Context, sql string, args ...any) (pgconn.CommandTag, error)
+	Query(ctx context.Context, sql string, args ...any) (pgx.Rows, error)
+	QueryRow(ctx context.Context, sql string, args ...any) pgx.Row
+}
+
+func TryExtractTX(ctx context.Context) Executor {
+	tx, ok := ctx.Value(ctxKey{}).(*Transaction)
+	if !ok {
+		return pool
+	}
+
+	return tx
+}

tg_parser/pkg/transaction/wrap.go

@@ -0,0 +1,38 @@
+package transaction
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/jackc/pgx/v5"
+	"github.com/rs/zerolog/log"
+)
+
+func Wrap(ctx context.Context, fn func(context.Context) error) error {
+	tx, err := pool.Begin(ctx)
+	if err != nil {
+		return fmt.Errorf("pool.Begin: %w", err)
+	}
+
+	defer func() {
+		err = tx.Rollback(ctx)
+		if err != nil && !errors.Is(err, pgx.ErrTxClosed) {
+			log.Error().Err(err).Msg("transaction: Rollback")
+		}
+	}()
+
+	ctx = context.WithValue(ctx, ctxKey{}, &Transaction{tx})
+
+	err = fn(ctx)
+	if err != nil {
+		return fmt.Errorf("fn: %w", err)
+	}
+
+	err = tx.Commit(ctx)
+	if err != nil {
+		return fmt.Errorf("tx.Commit: %w", err)
+	}
+
+	return nil
+}