blk/internal/app/app.go

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2024-08-11 01:51:18 +00:00
package app
import (
"context"
"log/slog"
"os"
"github.com/optclblast/blk/internal/controller/http"
"github.com/optclblast/blk/internal/infrastructure/getblock"
"github.com/optclblast/blk/internal/logger"
"github.com/optclblast/blk/internal/server"
"github.com/optclblast/blk/internal/usecase"
)
const (
// API access token
getblockAccessTokenEnv = "BLK_GETBLOCK_ACCESS_TOKEN"
// Log level
logLevelEnv = "BLK_LOG_LEVEL"
// Listen address
httpAddrEnv = "BLK_HTTP_ADDR"
)
// Init is a main function in our application lifecycle.
// Init is responsible for bringing all the system's components together.
func Init(ctx context.Context) error {
// Fetch env vars
getblockAccessToken := os.Getenv(getblockAccessTokenEnv)
logLevel := os.Getenv(logLevelEnv)
httpAddr := os.Getenv(httpAddrEnv)
// Build logger
log := logger.NewBuilder().
WithLevel(logger.MapLevel(logLevel)).
Build()
log.Info(
"starting blk server 0w0",
slog.String("address", httpAddr),
slog.String("log level", logLevel),
)
// Initialize node provider client
getblockClient := getblock.NewClient(
log.WithGroup("getblock-client"),
getblockAccessToken,
)
// Initialize application layer
ethInteractor := usecase.NewEthInteractor(
log.WithGroup("eth-interactor"),
getblockClient,
)
// Initialize controller layer
walletsController := http.NewWalletsController(
log.WithGroup("wallets-controller"),
ethInteractor,
)
// Build a router
router := http.NewRouter(
log.WithGroup("router"),
walletsController,
)
// And run server with it
server := server.New(router, httpAddr)
select {
case <-ctx.Done():
log.Info("shutting down blk server. bye bye! =w=")
case err := <-server.Notify():
log.Error("error listen to net ;_;", logger.Err(err))
}
if err := server.Shutdown(); err != nil {
return err
}
return nil
}