First checkpoint

app/config.go

@@ -0,0 +1,34 @@
+package app
+
+import (
+	"log"
+
+	"github.com/caarlos0/env/v11"
+	"github.com/joho/godotenv"
+)
+
+type Config struct {
+	Port  int    `env:"PORT" envDefault:"8080"`
+	DBURL string `env:"DB_URL"`
+
+	S3Endpoint  string `env:"S3_ENDPOINT"`
+	S3AccessKey string `env:"S3_ACCESS_KEY"`
+	S3SecretKey string `env:"S3_SECRET_KEY"`
+	S3Bucket    string `env:"S3_BUCKET" envDefault:"geofiles"`
+	S3UseSSL    bool   `env:"S3_USE_SSL" envDefault:"false"`
+}
+
+func loadConfig() (*Config, error) {
+
+	if err := godotenv.Load(); err != nil {
+		log.Println("No .env file found, relying on system env")
+	}
+
+	cfg := &Config{}
+
+	if err := env.Parse(cfg); err != nil {
+		return nil, err
+	}
+
+	return cfg, nil
+}

app/database.go

@@ -0,0 +1,29 @@
+package app
+
+import (
+	"context"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+type Store struct {
+	pool *pgxpool.Pool
+}
+
+func newDB(ctx context.Context, cfg *Config) (*Store, error) {
+	pool, err := pgxpool.New(ctx, cfg.DBURL)
+
+	if err != nil {
+		return nil, err
+	}
+
+	if err := pool.Ping(ctx); err != nil {
+		return nil, err
+	}
+
+	return &Store{pool: pool}, nil
+}
+
+func (s *Store) closeDB() {
+	s.pool.Close()
+}

app/init.go

@@ -0,0 +1,44 @@
+package app
+
+import (
+	"context"
+	"log"
+
+	"github.com/go-playground/validator/v10"
+	"github.com/jackc/pgx/v5/pgxpool"
+	"github.com/minio/minio-go/v7"
+)
+
+type App struct {
+	Ctx       context.Context
+	Cfg       *Config
+	Db        *pgxpool.Pool
+	S3        *minio.Client
+	Validator *validator.Validate
+}
+
+func NewApp(ctx context.Context) *App {
+	cfg, err := loadConfig()
+
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	db, err := newDB(ctx, cfg)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	s3, err := newS3Client(ctx, cfg)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	return &App{
+		Ctx:       ctx,
+		Cfg:       cfg,
+		Db:        db.pool,
+		S3:        s3,
+		Validator: validator.New(validator.WithRequiredStructEnabled()),
+	}
+}

app/storage.go

@@ -0,0 +1,31 @@
+package app
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/minio/minio-go/v7"
+	"github.com/minio/minio-go/v7/pkg/credentials"
+)
+
+func newS3Client(ctx context.Context, cfg *Config) (*minio.Client, error) {
+	client, err := minio.New(cfg.S3Endpoint, &minio.Options{
+		Creds:  credentials.NewStaticV4(cfg.S3AccessKey, cfg.S3SecretKey, ""),
+		Secure: cfg.S3UseSSL,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("s3 client: %w", err)
+	}
+
+	exists, err := client.BucketExists(ctx, cfg.S3Bucket)
+	if err != nil {
+		return nil, fmt.Errorf("s3 bucket check: %w", err)
+	}
+	if !exists {
+		if err := client.MakeBucket(ctx, cfg.S3Bucket, minio.MakeBucketOptions{}); err != nil {
+			return nil, fmt.Errorf("s3 make bucket: %w", err)
+		}
+	}
+
+	return client, nil
+}