feat: publish standalone worker

Separate worker packaging and service lifecycle from the control plane.

app/models/check.go

@@ -0,0 +1,171 @@
+package models
+
+import (
+	"encoding/json"
+	"strings"
+	"time"
+	"unicode"
+
+	"github.com/lib/pq"
+	"gorm.io/datatypes"
+	"gorm.io/gorm"
+)
+
+// Check provides functionality.
+type Check struct {
+	ID      int64 `gorm:"primarykey" json:"id"`
+	Enabled *bool `gorm:"not null;default:true" json:"enabled"`
+
+	MonitorID int64    `gorm:"index;type:bigint REFERENCES monitors(id)" json:"monitor_id,omitempty"`
+	Monitor   *Monitor `json:"-"`
+
+	Name     *string `json:"name"`
+	Kind     string  `json:"kind"`
+	Interval int     `json:"interval" validate:"required,gte=60"`
+
+	// URL to monitor
+	URL *string `json:"url,omitempty"`
+
+	// Other settings of the check
+	Settings datatypes.JSON `gorm:"not null;" json:"settings"`
+
+	State string `gorm:"not null;default:'UNK'" json:"state"`
+
+	LastStart *time.Time `json:"last_start"`
+	LastEnd   *time.Time `json:"last_end"`
+	LastOk    *time.Time `json:"last_ok"`
+	LastFail  *time.Time `json:"last_fail"`
+	WasUp     *time.Time `json:"was_up"`
+
+	Fails   int        `json:"fails"`
+	Expires *time.Time `json:"expires"`
+
+	Error    *string        `json:"error"`
+	Warnings pq.StringArray `gorm:"type:varchar(255)[]" json:"warnings"`
+	Infos    pq.StringArray `gorm:"type:varchar(255)[]" json:"infos"`
+
+	// RequireQuorum enables multi-region result aggregation (Phase 3 of
+	// docs/todo.md): when >1 the check's State is NOT written directly by
+	// ApplyRemoteCheckResult — instead CheckRegionResult rows accumulate
+	// until app/models/check_aggregator.go decides OK/ERR/DEGRADED.
+	// Default 1 keeps the legacy single-region behavior unchanged.
+	RequireQuorum int `gorm:"not null;default:1" json:"require_quorum"`
+
+	// AggregationWindowSeconds is how long the aggregator waits for
+	// regional CheckRegionResult rows before deciding the check's State.
+	// Stored as int seconds (matching the existing GORM style — no
+	// time.Duration columns) and exposed via AggregationWindow(). Default
+	// 5s; ignored when RequireQuorum <= 1.
+	AggregationWindowSeconds int `gorm:"not null;default:5" json:"aggregation_window_seconds"`
+
+	IsNew   bool `gorm:"-:all" sql:"-" json:"is_new,omitempty"`
+	Deleted bool `gorm:"-:all" sql:"-" json:"deleted,omitempty"`
+
+	Events []Event `json:"-" gorm:"many2many:event_checks;"`
+
+	Audited
+}
+
+// ExpScope provides functionality.
+func ExpScope(q *gorm.DB) *gorm.DB {
+	return q.Where("kind IN ('whois', 'ssl')").
+		Preload("Monitor").
+		Preload("Monitor.Group").
+		Preload("Monitor.Group.Notifications").
+		Preload("Monitor.Group.Notifications.Contacts").
+		Where("expires < ?", time.Now().Add(time.Hour*7*24))
+}
+
+// IntervalOK provides functionality.
+func (c *Check) IntervalOK() bool {
+	if c.Kind == kindRKN {
+		return true
+	}
+
+	if c.Kind == kindWhois {
+		return c.Interval >= 43200
+	}
+
+	return c.Interval >= 30
+}
+
+// GetLabel provides functionality.
+func (c *Check) GetLabel() string {
+	if c.Name != nil {
+		return *c.Name
+	}
+	if c.URL != nil {
+		return *c.URL
+	}
+	return c.Kind
+}
+
+// KindLabel provides functionality.
+func (c *Check) KindLabel() string {
+	if c.Kind == kindWhois {
+		return "регистрация домена"
+	}
+	if c.Kind == kindSSL {
+		return "SSL сертификат"
+	}
+
+	return c.Kind
+}
+
+// GetSettings provides functionality.
+func (c *Check) GetSettings() CheckSettings {
+	d := CheckSettings{}
+
+	err := json.Unmarshal(c.Settings, &d)
+	if err != nil {
+		panic(err)
+	}
+	return d
+}
+
+// ValidateSettings provides functionality.
+func (c *Check) ValidateSettings() error {
+	if len(c.Settings) == 0 {
+		c.Settings = []byte("{}")
+	}
+
+	return nil
+}
+
+// GetURL provides functionality.
+func (c *Check) GetURL() (string, error) {
+	// return c.GetSettings()["url"].(string)
+	if c.URL != nil {
+		return *c.URL, nil
+	}
+
+	return "http://" + c.Monitor.Host, nil
+}
+
+// MetricName provides functionality.
+func (c *Check) MetricName() string {
+	sanitized := strings.Map(func(r rune) rune {
+		if unicode.IsLetter(r) || unicode.IsDigit(r) || r == '_' || r == ':' {
+			return r
+		}
+		return '_'
+	}, c.Kind)
+	return "c" + sanitized
+}
+
+// QuorumEnabled reports whether this check should be aggregated by
+// app/models/check_aggregator.go. When false (RequireQuorum <= 1),
+// ApplyRemoteCheckResult keeps the legacy direct State update path.
+func (c *Check) QuorumEnabled() bool {
+	return c.RequireQuorum > 1
+}
+
+// AggregationWindow returns AggregationWindowSeconds as a time.Duration.
+// Defaults to 5s when the underlying int is zero/negative, mirroring the
+// GORM column default; callers can rely on a strictly positive value.
+func (c *Check) AggregationWindow() time.Duration {
+	if c.AggregationWindowSeconds <= 0 {
+		return 5 * time.Second
+	}
+	return time.Duration(c.AggregationWindowSeconds) * time.Second
+}