data layer

data-layer/api/internal/config/config.go

@@ -0,0 +1,47 @@
+// Package config loads runtime configuration from environment variables.
+//
+// Vars prefixed with ANALYTICS_ are owned by this service; un-prefixed ones
+// (POSTGRES_DSN, REDIS_ADDR, CLICKHOUSE_*) are shared with cdp-ingestion.
+package config
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/caarlos0/env/v11"
+)
+
+type Config struct {
+	HTTPAddr        string        `env:"ANALYTICS_HTTP_ADDR"               envDefault:":4000"`
+	LogLevel        string        `env:"ANALYTICS_LOG_LEVEL"               envDefault:"info"`
+	ShutdownTimeout time.Duration `env:"ANALYTICS_SHUTDOWN_TIMEOUT_SECONDS" envDefault:"30s"`
+
+	// Cache TTLs — configurable per query type.
+	CacheTTLQuery   time.Duration `env:"ANALYTICS_CACHE_TTL_QUERY_SECONDS"   envDefault:"60s"`
+	CacheTTLProfile time.Duration `env:"ANALYTICS_CACHE_TTL_PROFILE_SECONDS" envDefault:"30s"`
+
+	// Where ClickHouse SQL templates live on disk. Resolved relative to the
+	// process working directory; default matches `cd api && go run ./cmd/server`.
+	ClickHouseTemplatesDir string `env:"ANALYTICS_CH_TEMPLATES_DIR" envDefault:"../infra/clickhouse"`
+
+	// Custom SQL ClickHouse credentials — separate read-only user.
+	ClickHouseSQLUser     string `env:"ANALYTICS_CH_SQL_USER"     envDefault:"analytics_ro"`
+	ClickHouseSQLPassword string `env:"ANALYTICS_CH_SQL_PASSWORD"`
+
+	// Shared infra ----------------------------------------------------------
+	PostgresDSN string `env:"POSTGRES_DSN,required"`
+	RedisAddr   string `env:"REDIS_ADDR" envDefault:"localhost:6379"`
+
+	ClickHouseAddr     string `env:"CLICKHOUSE_ADDR"     envDefault:"localhost:9000"`
+	ClickHouseDB       string `env:"CLICKHOUSE_DB"       envDefault:"cdp"`
+	ClickHouseUser     string `env:"CLICKHOUSE_USER"     envDefault:"default"`
+	ClickHousePassword string `env:"CLICKHOUSE_PASSWORD"`
+}
+
+func Load() (*Config, error) {
+	cfg := &Config{}
+	if err := env.Parse(cfg); err != nil {
+		return nil, fmt.Errorf("config load: %w", err)
+	}
+	return cfg, nil
+}