added ideal and thresholds for NVMe and SCSI drives.

Added functions (PopulateAttributeStatus) to ensure that NVME and SCSI drives set the status for SMART attributes.
Moved Status populating fucntion into the *Attribute files, so they are closer to the code they actually interact with.
Fix frontend to correctly display status, thresh and Ideal for NVMe and SCSI ddrives.

webapp/backend/pkg/models/db/smart_nvme_attribute.go

@@ -1,6 +1,9 @@
 package db
 
-import "github.com/jinzhu/gorm"
+import (
+	"github.com/analogj/scrutiny/webapp/backend/pkg/metadata"
+	"github.com/jinzhu/gorm"
+)
 
 type SmartNvmeAttribute struct {
 	gorm.Model
@@ -19,3 +22,25 @@ type SmartNvmeAttribute struct {
 	FailureRate      float64              `gorm:"-" json:"failure_rate,omitempty"`
 	History          []SmartNvmeAttribute `gorm:"-" json:"history,omitempty"`
 }
+
+//populate attribute status, using SMART Thresholds & Observed Metadata
+func (sa *SmartNvmeAttribute) PopulateAttributeStatus() {
+
+	//-1 is a special number meaning no threshold.
+	if sa.Threshold != -1 {
+		if smartMetadata, ok := metadata.NmveMetadata[sa.AttributeId]; ok {
+			//check what the ideal is. Ideal tells us if we our recorded value needs to be above, or below the threshold
+			if (smartMetadata.Ideal == "low" && sa.Value > sa.Threshold) ||
+				(smartMetadata.Ideal == "high" && sa.Value < sa.Threshold) {
+				sa.Status = SmartAttributeStatusFailed
+				sa.StatusReason = "Attribute is failing recommended SMART threshold"
+			}
+		}
+	}
+	//TODO: eventually figure out the critical_warning bits and determine correct error messages here.
+
+	//check if status is blank, set to "passed"
+	if len(sa.Status) == 0 {
+		sa.Status = SmartAttributeStatusPassed
+	}
+}