feat(alerting): working on alert notification and image rendering

pkg/services/alerting/eval_context.go

@@ -1,25 +1,31 @@
 package alerting
 
 import (
+	"fmt"
 	"time"
 
+	"github.com/grafana/grafana/pkg/bus"
 	"github.com/grafana/grafana/pkg/log"
 	m "github.com/grafana/grafana/pkg/models"
+	"github.com/grafana/grafana/pkg/setting"
 )
 
 type EvalContext struct {
-	Firing      bool
-	IsTestRun   bool
-	Events      []*Event
-	Logs        []*ResultLogEntry
-	Error       error
-	Description string
-	StartTime   time.Time
-	EndTime     time.Time
-	Rule        *Rule
-	DoneChan    chan bool
-	CancelChan  chan bool
-	log         log.Logger
+	Firing          bool
+	IsTestRun       bool
+	Events          []*Event
+	Logs            []*ResultLogEntry
+	Error           error
+	Description     string
+	StartTime       time.Time
+	EndTime         time.Time
+	Rule            *Rule
+	DoneChan        chan bool
+	CancelChan      chan bool
+	log             log.Logger
+	dashboardSlug   string
+	ImagePublicUrl  string
+	ImageOnDiskPath string
 }
 
 func (a *EvalContext) GetDurationMs() float64 {
@@ -50,6 +56,38 @@ func (c *EvalContext) GetStateText() string {
 	}
 }
 
+func (c *EvalContext) getDashboardSlug() (string, error) {
+	if c.dashboardSlug != "" {
+		return c.dashboardSlug, nil
+	}
+
+	slugQuery := &m.GetDashboardSlugByIdQuery{Id: c.Rule.DashboardId}
+	if err := bus.Dispatch(slugQuery); err != nil {
+		return "", err
+	}
+
+	c.dashboardSlug = slugQuery.Result
+	return c.dashboardSlug, nil
+}
+
+func (c *EvalContext) GetRuleUrl() (string, error) {
+	if slug, err := c.getDashboardSlug(); err != nil {
+		return "", err
+	} else {
+		ruleUrl := fmt.Sprintf("%sdashboard/db/%s?fullscreen&edit&tab=alert&panelId=%d", setting.AppUrl, slug, c.Rule.PanelId)
+		return ruleUrl, nil
+	}
+}
+
+func (c *EvalContext) GetImageUrl() (string, error) {
+	if slug, err := c.getDashboardSlug(); err != nil {
+		return "", err
+	} else {
+		ruleUrl := fmt.Sprintf("%sdashboard-solo/db/%s?&panelId=%d", setting.AppUrl, slug, c.Rule.PanelId)
+		return ruleUrl, nil
+	}
+}
+
 func NewEvalContext(rule *Rule) *EvalContext {
 	return &EvalContext{
 		StartTime:  time.Now(),