feat: add basic linkding connection

internal/service/service.go

@@ -0,0 +1,42 @@
+package service
+
+import "fmt"
+
+type ServiceOption string
+
+const (
+	ServiceLinkding ServiceOption = "linkding"
+)
+
+type ServiceConfig struct {
+	Service ServiceOption
+	Host    string
+	User    string
+	Token   string
+}
+
+type Service interface {
+	IsAvailable() (bool, error)
+	Archive(string) error
+}
+
+func ResolveService(serviceConfig ServiceConfig) (Service, error) {
+	var service Service
+	switch serviceConfig.Service {
+	case ServiceLinkding:
+		service, _ = NewLinkding(serviceConfig)
+	default:
+		return nil, fmt.Errorf("Could not determine service to connect to")
+	}
+
+	if isAvailable, err := service.IsAvailable(); !isAvailable {
+		return nil, fmt.Errorf(
+			"Could not connect to the service %v in %v: %v",
+			serviceConfig.Service,
+			serviceConfig.Host,
+			err,
+		)
+	}
+
+	return service, nil
+}