feat: initial commit

2025-03-31 16:17:35 +01:00
commit 6719f8a61a
91 changed files with 7119 additions and 0 deletions
@@ -0,0 +1,148 @@
+package main
+
+import (
+	"context"
+	"expvar"
+	"log"
+	"runtime"
+	"time"
+
+	"github.com/FernandoVideira/LK_API_Temp/internal/auth"
+	"github.com/FernandoVideira/LK_API_Temp/internal/db"
+	"github.com/FernandoVideira/LK_API_Temp/internal/env"
+	"github.com/FernandoVideira/LK_API_Temp/internal/mailer"
+	"github.com/FernandoVideira/LK_API_Temp/internal/ratelimiter"
+	"github.com/FernandoVideira/LK_API_Temp/internal/store"
+	"github.com/FernandoVideira/LK_API_Temp/internal/store/cache"
+	"github.com/go-redis/redis/v8"
+	"go.uber.org/zap"
+)
+
+const version = ""
+
+//	@title			LK API Template
+//	@description	This is a template for building APIs with Go, Chi, and Swagger.
+//	@termsOfService	http://swagger.io/terms/
+
+//	@contact.name	API Support
+//	@contact.url	http://www.swagger.io/support
+//	@contact.email	[email protected]
+
+//	@license.name	Apache 2.0
+//	@license.url	http://www.apache.org/licenses/LICENSE-2.0.html
+
+// @BasePath					/v1
+//
+// @securityDefinitions.apikey	ApiKeyAuth
+// @in							header
+// @name						Authorization
+// @description
+func main() {
+	cfg := config{
+		addr:        env.GetString("ADDR", ":8080"),
+		apiURL:      env.GetString("EXTERNAL_URL", "localhost:8080"),
+		frontEndURL: env.GetString("FRONTEND_URL", "http://localhost:5173"),
+		db: dbConfig{
+			addr:         env.GetString("DB_ADDR", "postgres://postgres:postgres@localhost:5432/lk_tmpl?sslmode=disable"),
+			maxOpenConns: env.GetInt("DB_MAX_OPEN_CONNS", 30),
+			maxIdleConns: env.GetInt("DB_MAX_IDLE_CONNS", 30),
+			maxIdleTime:  env.GetDuration("DB_MAX_IDLE_TIME", "15m"),
+		},
+		redisCfg: redisConfig{
+			addr:    env.GetString("REDIS_ADDR", "localhost:6379"),
+			pw:      env.GetString("REDIS_PASSWORD", ""),
+			db:      env.GetInt("REDIS_DB", 0),
+			enabled: env.GetBool("REDIS_ENABLED", false),
+		},
+		env: env.GetString("ENV", "development"),
+		mail: mailConfig{
+			exp:       time.Hour * 24 * 3,
+			fromEmail: env.GetString("FROM_EMAIL", ""),
+			sendGrid: sendGridConfig{
+				apiKey: env.GetString("SENDGRID_API_KEY", ""),
+			},
+		},
+		auth: authConfig{
+			basic: basicConfig{
+				username: env.GetString("BASIC_AUTH_USERNAME", "admin"),
+				password: env.GetString("BASIC_AUTH_PASSWORD", "admin"),
+			},
+			token: tokenConfig{
+				secret: env.GetString("AUTH_TOKEN_SECRET", "secret"),
+				exp:    env.GetDuration("AUTH_TOKEN_EXP", "24h"),
+				iss:    env.GetString("AUTH_TOKEN_ISS", "lkapi"),
+				aud:    env.GetString("AUTH_TOKEN_AUD", "lkapi"),
+			},
+		},
+		rateLimiter: ratelimiter.Config{
+			RequestsPerTimeFrame: env.GetInt("RATE_LIMITER_REQS_COUNT", 20),
+			TimeFrame:            env.GetDuration("RATE_LIMITER_TIME_FRAME", "1m"),
+			Enabled:              env.GetBool("RATE_LIMITER_ENABLED", true),
+		},
+	}
+
+	// Logger
+	logger := zap.Must(zap.NewProduction()).Sugar()
+	defer logger.Sync()
+
+	// Database
+	db, err := db.New(
+		cfg.db.addr,
+		cfg.db.maxOpenConns,
+		cfg.db.maxIdleConns,
+		cfg.db.maxIdleTime,
+	)
+	if err != nil {
+		logger.Fatal(err)
+	}
+	defer db.Close()
+	logger.Info("database connection established")
+
+	// Cache
+	var redisDb *redis.Client
+	if cfg.redisCfg.enabled {
+		redisDb = cache.NewRedisClient(cfg.redisCfg.addr, cfg.redisCfg.pw, cfg.redisCfg.db)
+		logger.Info("redis connection established")
+	}
+
+	// Rate Limiter
+	rateLimiter := ratelimiter.NewFixedWindowLimiter(
+		cfg.rateLimiter.RequestsPerTimeFrame,
+		cfg.rateLimiter.TimeFrame,
+	)
+
+	store := store.NewStorage(db)
+	cacheStorage := cache.NewRedisStorage(redisDb)
+	mailer := mailer.NewSendGrid(cfg.mail.sendGrid.apiKey, cfg.mail.fromEmail)
+
+	jwtAuthenticator := auth.NewJWTAuthenticator(
+		cfg.auth.token.secret,
+		cfg.auth.token.aud,
+		cfg.auth.token.iss,
+	)
+
+	api := api{
+		config:        cfg,
+		store:         store,
+		cacheStore:    cacheStorage,
+		logger:        logger,
+		mailer:        mailer,
+		authenticator: jwtAuthenticator,
+		rateLimiter:   rateLimiter,
+	}
+
+	// Metrics Collected
+	expvar.NewString("version").Set(version)
+	expvar.Publish("database", expvar.Func(func() any {
+		return db.Stats()
+	}))
+	expvar.Publish("redis", expvar.Func(func() any {
+		return redisDb.Info(context.Background(), "keyspace")
+	}))
+	expvar.Publish("goroutines", expvar.Func(func() any {
+		return runtime.NumGoroutine()
+	}))
+
+	mux := api.mount()
+	log.Fatal(api.run(mux))
+}