adding an GetEnabledSubsystems API to storage miner

api/api_storage.go

@@ -166,6 +166,8 @@ type StorageMiner interface {
 	MarketPendingDeals(ctx context.Context) (PendingDealInfo, error)                                                             //perm:write
 	MarketPublishPendingDeals(ctx context.Context) error                                                                         //perm:admin
 
+	GetEnabledSubsystems(ctx context.Context) ([]MinerSubsystem, error) //perm:read
+
 	DealsImportData(ctx context.Context, dealPropCid cid.Cid, file string) error //perm:admin
 	DealsList(ctx context.Context) ([]MarketDeal, error)                         //perm:admin
 	DealsConsiderOnlineStorageDeals(context.Context) (bool, error)               //perm:admin

api/api_subsystems.go

@@ -0,0 +1,61 @@
+package api
+
+import (
+	"bytes"
+	"encoding/json"
+)
+
+type MinerSubsystem int
+
+const (
+	MarketsSubsystem MinerSubsystem = 1 << iota
+	MiningSubsystem
+	SealingSubsystem
+	SectorStorageSubsystem
+
+	MinerSubsystems = iota
+)
+
+func (ms MinerSubsystem) Add(single MinerSubsystem) MinerSubsystem {
+	return ms | single
+}
+
+func (ms MinerSubsystem) Has(single MinerSubsystem) bool {
+	return ms&single == single
+}
+
+func (ms MinerSubsystem) String() string {
+	return MinerSubsystemToString[ms]
+}
+
+var MinerSubsystemToString = map[MinerSubsystem]string{
+	MarketsSubsystem:       "Markets",
+	MiningSubsystem:        "Mining",
+	SealingSubsystem:       "Sealing",
+	SectorStorageSubsystem: "SectorStorage",
+}
+
+var MinerSubsystemToID = map[string]MinerSubsystem{
+	"Markets":       MarketsSubsystem,
+	"Mining":        MiningSubsystem,
+	"Sealing":       SealingSubsystem,
+	"SectorStorage": SectorStorageSubsystem,
+}
+
+func (ms MinerSubsystem) MarshalJSON() ([]byte, error) {
+	buffer := bytes.NewBufferString(`"`)
+	buffer.WriteString(MinerSubsystemToString[ms])
+	buffer.WriteString(`"`)
+	return buffer.Bytes(), nil
+}
+
+func (ms *MinerSubsystem) UnmarshalJSON(b []byte) error {
+	var j string
+	err := json.Unmarshal(b, &j)
+	if err != nil {
+		return err
+	}
+	// TODO: handle zero value
+	*ms = MinerSubsystemToID[j]
+	return nil
+}