chore: add legacy inventory metrics (#119)

Signed-off-by: Artur Troian <troian.ap@gmail.com>

go/inventory/v1/metrics.go

@@ -0,0 +1,84 @@
+package v1
+
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+
+	dtypes "github.com/akash-network/akash-api/go/node/deployment/v1beta3"
+)
+
+type ResourcesMetric struct {
+	CPU              uint64 `json:"cpu"`
+	GPU              uint64 `json:"gpu"`
+	Memory           uint64 `json:"memory"`
+	StorageEphemeral uint64 `json:"storage_ephemeral"`
+}
+
+type NodeMetrics struct {
+	Name        string          `json:"name"`
+	Allocatable ResourcesMetric `json:"allocatable"`
+	Available   ResourcesMetric `json:"available"`
+}
+
+type Metrics struct {
+	Nodes            []NodeMetrics `json:"nodes"`
+	TotalAllocatable MetricTotal   `json:"total_allocatable"`
+	TotalAvailable   MetricTotal   `json:"total_available"`
+}
+
+type MetricTotal struct {
+	CPU              uint64           `json:"cpu"`
+	GPU              uint64           `json:"gpu"`
+	Memory           uint64           `json:"memory"`
+	StorageEphemeral uint64           `json:"storage_ephemeral"`
+	Storage          map[string]int64 `json:"storage,omitempty"`
+}
+
+type StorageStatus struct {
+	Class string `json:"class"`
+	Size  int64  `json:"size"`
+}
+
+// InventoryMetrics stores active, pending and available units
+type InventoryMetrics struct {
+	Active    []MetricTotal `json:"active,omitempty"`
+	Pending   []MetricTotal `json:"pending,omitempty"`
+	Available struct {
+		Nodes   []NodeMetrics   `json:"nodes,omitempty"`
+		Storage []StorageStatus `json:"storage,omitempty"`
+	} `json:"available,omitempty"`
+	Error error `json:"error,omitempty"`
+}
+
+func (inv *MetricTotal) AddResources(res dtypes.ResourceUnit) {
+	cpu := sdk.NewIntFromUint64(inv.CPU)
+	gpu := sdk.NewIntFromUint64(inv.GPU)
+	mem := sdk.NewIntFromUint64(inv.Memory)
+	ephemeralStorage := sdk.NewIntFromUint64(inv.StorageEphemeral)
+
+	if res.CPU != nil {
+		cpu = cpu.Add(res.CPU.Units.Val.MulRaw(int64(res.Count)))
+	}
+
+	if res.GPU != nil {
+		gpu = gpu.Add(res.GPU.Units.Val.MulRaw(int64(res.Count)))
+	}
+
+	if res.Memory != nil {
+		mem = mem.Add(res.Memory.Quantity.Val.MulRaw(int64(res.Count)))
+	}
+
+	for _, storage := range res.Storage {
+		if storageClass, found := storage.Attributes.Find("class").AsString(); !found {
+			ephemeralStorage = ephemeralStorage.Add(storage.Quantity.Val.MulRaw(int64(res.Count)))
+		} else {
+			val := sdk.NewIntFromUint64(uint64(inv.Storage[storageClass]))
+			val = val.Add(storage.Quantity.Val.MulRaw(int64(res.Count)))
+			inv.Storage[storageClass] = val.Int64()
+		}
+	}
+
+	inv.CPU = cpu.Uint64()
+	inv.GPU = gpu.Uint64()
+	inv.Memory = mem.Uint64()
+	inv.StorageEphemeral = ephemeralStorage.Uint64()
+}