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saver.go
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saver.go
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package oonirun
import (
"errors"
"github.com/ooni/probe-engine/pkg/engine"
"github.com/ooni/probe-engine/pkg/model"
)
// SaverConfig is the configuration for creating a new Saver.
type SaverConfig struct {
// Enabled is true if saving is enabled.
Enabled bool
// FilePath is the filepath where to append the measurement as a
// serialized JSON followed by a newline character.
FilePath string
// Logger is the logger used by the saver.
Logger model.Logger
}
// NewSaver creates a new instance of Saver.
func NewSaver(config SaverConfig) (model.Saver, error) {
if !config.Enabled {
return fakeSaver{}, nil
}
if config.FilePath == "" {
return nil, errors.New("saver: passed an empty filepath")
}
return &realSaver{
FilePath: config.FilePath,
Logger: config.Logger,
savefunc: engine.SaveMeasurement,
}, nil
}
type fakeSaver struct{}
func (fs fakeSaver) SaveMeasurement(m *model.Measurement) error {
return nil
}
var _ model.Saver = fakeSaver{}
type realSaver struct {
FilePath string
Logger model.Logger
savefunc func(measurement *model.Measurement, filePath string) error
}
func (rs *realSaver) SaveMeasurement(m *model.Measurement) error {
rs.Logger.Info("saving measurement to disk")
return rs.savefunc(m, rs.FilePath)
}
var _ model.Saver = &realSaver{}