feat: currencies exchange rates cache (#22)

Makefile

@@ -14,9 +14,13 @@ stop:
 	@echo "Stopping application and its dependencies..."
 	@docker-compose down --remove-orphans
 
+mocks:
+	@echo "Creating mocks..."
+	@go generate ./...
+
 tests:
 	@echo "# Running tests..."
-	@go test -cover ./application/services/... ./domain/services/...
+	@go test -cover ./application/services/...
 
 tidy:
 	@echo "# Formatting code..."

application/config/config.go

@@ -5,6 +5,7 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"time"
 
 	"github.com/spf13/viper"
 )
@@ -14,6 +15,11 @@ func init() {
 	viper.SetDefault("database.kind", "mongodb")
 	viper.SetDefault("database.uri", "mongodb://database:27017")
 
+	// Cache Config
+	viper.SetDefault("cache.address", "cache:6379")
+	viper.SetDefault("cache.connection_timeout", "5s")
+	viper.SetDefault("cache.currency_exchange_rates.ttl", "24h")
+
 	// Server config
 	viper.SetDefault("server.address", ":8080")
 	viper.SetDefault("server.development_environment", true)
@@ -39,6 +45,14 @@ type Config struct {
 		URI  string
 	}
 
+	Cache struct {
+		Address               string
+		ConnectionTimeout     time.Duration `mapstructure:"connection_timeout"`
+		CurrencyExchangeRates struct {
+			TTL time.Duration
+		} `mapstructure:"currency_exchange_rates"`
+	}
+
 	Server struct {
 		Address                string
 		DevelopmentEnvironment bool `mapstructure:"development_environment"`

application/repositories/currencies_repository.go

@@ -1,9 +1,11 @@
 package repositories
 
-import "convercy/domain/aggregate"
+import "convercy/domain/valueobject"
 
-//go:generate mockery --name RegisteredCurrenciesRepository
-type RegisteredCurrenciesRepository interface {
-	GetRegisteredCurrencies() (*aggregate.RegisteredCurrencies, error)
-	SaveRegisteredCurrencies(registeredCurrencies *aggregate.RegisteredCurrencies) error
+// CurrenciesRepository is a service responsible for providing all known currencies
+//
+//go:generate mockery --name CurrenciesRepository
+type CurrenciesRepository interface {
+	// ListCurrencyCodes should return a list with all known currency codes
+	ListCurrencyCodes() (valueobject.CurrencyCodes, error)
 }

application/repositories/currency_exchange_rates_cache.go

@@ -0,0 +1,12 @@
+package repositories
+
+import (
+	"convercy/domain/aggregate"
+	"convercy/domain/valueobject"
+)
+
+//go:generate mockery --name CurrencyExchangeRatesCache
+type CurrencyExchangeRatesCache interface {
+	GetCurrencyExchangeRates(code valueobject.CurrencyCode) (*aggregate.CurrencyExchangeRates, error)
+	SaveCurrencyExchangeRates(currencyExchangeRates *aggregate.CurrencyExchangeRates) error
+}

application/repositories/currency_exchange_rates_repository.go

@@ -0,0 +1,11 @@
+package repositories
+
+import (
+	"convercy/domain/aggregate"
+	"convercy/domain/valueobject"
+)
+
+//go:generate mockery --name CurrencyExchangeRatesRepository
+type CurrencyExchangeRatesRepository interface {
+	GetCurrencyExchangeRates(code valueobject.CurrencyCode) (*aggregate.CurrencyExchangeRates, error)
+}

application/repositories/registered_currencies_repository.go

@@ -0,0 +1,9 @@
+package repositories
+
+import "convercy/domain/aggregate"
+
+//go:generate mockery --name RegisteredCurrenciesRepository
+type RegisteredCurrenciesRepository interface {
+	GetRegisteredCurrencies() (*aggregate.RegisteredCurrencies, error)
+	SaveRegisteredCurrencies(registeredCurrencies *aggregate.RegisteredCurrencies) error
+}