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package trust
import "time"
// TrustMetricConfig - Configures the weight functions and time intervals for the metric
type TrustMetricConfig struct {
// Determines the percentage given to current behavior
ProportionalWeight float64
// Determines the percentage given to prior behavior
IntegralWeight float64
// The window of time that the trust metric will track events across.
// This can be set to cover many days without issue
TrackingWindow time.Duration
// Each interval should be short for adapability.
// Less than 30 seconds is too sensitive,
// and greater than 5 minutes will make the metric numb
IntervalLength time.Duration
}
// DefaultConfig returns a config with values that have been tested and produce desirable results
func DefaultConfig() TrustMetricConfig {
return TrustMetricConfig{
ProportionalWeight: 0.4,
IntegralWeight: 0.6,
TrackingWindow: (time.Minute * 60 * 24) * 14, // 14 days.
IntervalLength: 1 * time.Minute,
}
}
// Ensures that all configuration elements have valid values
func customConfig(tmc TrustMetricConfig) TrustMetricConfig {
config := DefaultConfig()
// Check the config for set values, and setup appropriately
if tmc.ProportionalWeight > 0 {
config.ProportionalWeight = tmc.ProportionalWeight
}
if tmc.IntegralWeight > 0 {
config.IntegralWeight = tmc.IntegralWeight
}
if tmc.IntervalLength > time.Duration(0) {
config.IntervalLength = tmc.IntervalLength
}
if tmc.TrackingWindow > time.Duration(0) &&
tmc.TrackingWindow >= config.IntervalLength {
config.TrackingWindow = tmc.TrackingWindow
}
return config
}