server

type AccountCredentials interface {
	Customer() (credentials map[string]string)
	Admin() (credentials map[string]string)
}

type AccountResourceGroup interface {
	AllResourceNames() []string
	SelectedResources(resNames ...string) map[string]*Resource
}

type Resource struct {
	Name        string
	Description string
	Allocated   float64
	Used        float64
}

type Server interface {

	// ResourceGroup() shows usage statistics of all allocatable resources on the server
	ResourceGroup() ServerResourceGroup

	// CreateAccount() utilizes internal server configuration and aconf pased in to create a series of accounts with
	// same sconf and variable aconf in order.
	CreateAccount(referenceID int, accountConfiguration interface{}) error

	// ReadAccount() returns an ServerAccount-compatible struct
	ReadAccount(referenceID int) (ServerAccount, error)

	// UpdateAccount() utilizes internal server configuration and aconf pased in to update a series of accounts
	// specified by referenceID.
	UpdateAccount(referenceID int, accountConfiguration interface{}) error

	// DeleteAccount() utilizes internal server configuration to delete a series of accounts specified by accID.
	DeleteAccount(referenceID int) error

	// PurgeResourceUsage sets all USED resource counter to 0 for all users.
	// usecase: clean-reinstall
	// Won't be automatically called on a time-basis. Not a cronjob mounting point.
	PurgeResourceUsage()
}

type ServerAccount interface {
	Credentials() (AccountCredentials, error)
	ResourceGroup() (AccountResourceGroup, error)
}

type ServerGen func(db *sql.DB, instanceID string, serverConfiguration interface{}) (Server, error)

type ServerResourceAllocation struct {
	UserAllocatedPercentageMap map[string]float64
	UserConsumedPercentageMap  map[string]float64
}

type ServerResourceGroup interface {
	AllResourceNames() []string
	SelectedResources(resNames ...string) map[string]*Resource

	ResourceAllocations(resNames ...string) map[string]*ServerResourceAllocation
}