feat: added API gateway

internal/gw/config/config.go

@@ -0,0 +1,101 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"strconv"
+)
+
+type Config struct {
+	Server ServerConfig
+	GRPC   GRPCConfig
+	S3     S3Config
+	Auth   AuthConfig
+}
+
+type ServerConfig struct {
+	Port string
+	Host string
+}
+
+type GRPCConfig struct {
+	AuthServiceAddr         string
+	UserServiceAddr         string
+	CompetitionServiceAddr  string
+	TaskServiceAddr         string
+	SubmissionServiceAddr   string
+	ResultsServiceAddr      string
+	ReviewServiceAddr       string
+	AchievementsServiceAddr string
+}
+
+type S3Config struct {
+	AccessKeyID     string
+	SecretAccessKey string
+	Region          string
+	Bucket          string
+	Endpoint        string
+}
+
+type AuthConfig struct {
+	JWTSecret string
+}
+
+func Load() (*Config, error) {
+	cfg := &Config{
+		Server: ServerConfig{
+			Port: getEnv("SERVER_PORT", "8080"),
+			Host: getEnv("SERVER_HOST", "0.0.0.0"),
+		},
+		GRPC: GRPCConfig{
+			AuthServiceAddr:         getEnvRequired("AUTH_SERVICE_ADDR"),
+			UserServiceAddr:         getEnvRequired("USER_SERVICE_ADDR"),
+			CompetitionServiceAddr:  getEnvRequired("COMPETITION_SERVICE_ADDR"),
+			TaskServiceAddr:         getEnvRequired("TASK_SERVICE_ADDR"),
+			SubmissionServiceAddr:   getEnvRequired("SUBMISSION_SERVICE_ADDR"),
+			ResultsServiceAddr:      getEnvRequired("RESULTS_SERVICE_ADDR"),
+			ReviewServiceAddr:       getEnvRequired("REVIEW_SERVICE_ADDR"),
+			AchievementsServiceAddr: getEnvRequired("ACHIEVEMENTS_SERVICE_ADDR"),
+		},
+		S3: S3Config{
+			AccessKeyID:     getEnvRequired("AWS_ACCESS_KEY_ID"),
+			SecretAccessKey: getEnvRequired("AWS_SECRET_ACCESS_KEY"),
+			Region:          getEnvRequired("AWS_REGION"),
+			Bucket:          getEnvRequired("S3_BUCKET"),
+			Endpoint:        getEnv("S3_ENDPOINT", ""),
+		},
+		Auth: AuthConfig{
+			JWTSecret: getEnv("JWT_SECRET", ""),
+		},
+	}
+
+	return cfg, nil
+}
+
+func getEnv(key, defaultValue string) string {
+	value := os.Getenv(key)
+	if value == "" {
+		return defaultValue
+	}
+	return value
+}
+
+func getEnvRequired(key string) string {
+	value := os.Getenv(key)
+	if value == "" {
+		panic(fmt.Sprintf("required environment variable %s is not set", key))
+	}
+	return value
+}
+
+func getEnvAsInt(key string, defaultValue int) int {
+	valueStr := os.Getenv(key)
+	if valueStr == "" {
+		return defaultValue
+	}
+	value, err := strconv.Atoi(valueStr)
+	if err != nil {
+		return defaultValue
+	}
+	return value
+}