WIP settings system.

- updated dbdiagrams schema
- [BREAKING] force failure if `notify.filter_attributes` or `notify.level` is set
- added Settings table (and default values during migration)
- Added Save Settings and Get Settings functions.
- Added web API endpoints for getting and saving settings.
- Deprecated old Notify* constants. Created new MetricsStatus* and MetricsNotifyLevel constants.

webapp/backend/pkg/models/settings.go

@@ -0,0 +1,35 @@
+package models
+
+import "github.com/analogj/scrutiny/webapp/backend/pkg"
+
+// Settings is made up of parsed SettingEntry objects retrieved from the database
+type Settings struct {
+	MetricsNotifyLevel            pkg.MetricsNotifyLevel            `json:"metrics_notify_level"`
+	MetricsStatusFilterAttributes pkg.MetricsStatusFilterAttributes `json:"metrics_status_filter_attributes"`
+	MetricsStatusThreshold        pkg.MetricsStatusThreshold        `json:"metrics_status_threshold"`
+}
+
+func (s *Settings) PopulateFromSettingEntries(entries []SettingEntry) {
+	for _, entry := range entries {
+		if entry.SettingKeyName == "metrics.notify.level" {
+			s.MetricsNotifyLevel = pkg.MetricsNotifyLevel(entry.SettingValueNumeric)
+		} else if entry.SettingKeyName == "metrics.status.filter_attributes" {
+			s.MetricsStatusFilterAttributes = pkg.MetricsStatusFilterAttributes(entry.SettingValueNumeric)
+		} else if entry.SettingKeyName == "metrics.status.threshold" {
+			s.MetricsStatusThreshold = pkg.MetricsStatusThreshold(entry.SettingValueNumeric)
+		}
+	}
+}
+
+func (s *Settings) UpdateSettingEntries(entries []SettingEntry) []SettingEntry {
+	for _, entry := range entries {
+		if entry.SettingKeyName == "metrics.notify.level" {
+			entry.SettingValueNumeric = int64(s.MetricsNotifyLevel)
+		} else if entry.SettingKeyName == "metrics.status.filter_attributes" {
+			entry.SettingValueNumeric = int64(s.MetricsStatusFilterAttributes)
+		} else if entry.SettingKeyName == "metrics.status.threshold" {
+			entry.SettingValueNumeric = int64(s.MetricsStatusThreshold)
+		}
+	}
+	return entries
+}