grafana/pkg/services/sqlstore/alert_notification.go

package sqlstore

import (
	"bytes"
	"fmt"
	"strconv"
	"time"

	"github.com/go-xorm/xorm"
	"github.com/grafana/grafana/pkg/bus"
	m "github.com/grafana/grafana/pkg/models"
)

func init() {
	bus.AddHandler("sql", AlertNotificationQuery)
	bus.AddHandler("sql", CreateAlertNotificationCommand)
	bus.AddHandler("sql", UpdateAlertNotification)
	bus.AddHandler("sql", DeleteAlertNotification)
}

func DeleteAlertNotification(cmd *m.DeleteAlertNotificationCommand) error {
	return inTransaction(func(sess *xorm.Session) error {
		sql := "DELETE FROM alert_notification WHERE alert_notification.org_id = ? AND alert_notification.id = ?"
		_, err := sess.Exec(sql, cmd.OrgId, cmd.Id)

		if err != nil {
			return err
		}

		return nil
	})
}

func AlertNotificationQuery(query *m.GetAlertNotificationQuery) error {
	return getAlertNotifications(query, x.NewSession())
}

func getAlertNotifications(query *m.GetAlertNotificationQuery, sess *xorm.Session) error {
	var sql bytes.Buffer
	params := make([]interface{}, 0)

	sql.WriteString(`SELECT
	   					  alert_notification.id,
	   					  alert_notification.org_id,
	   					  alert_notification.name,
	                      alert_notification.type,
	   					  alert_notification.created,
	                      alert_notification.updated,
	                      alert_notification.settings,
						  alert_notification.always_execute
	   					  FROM alert_notification
	   					  `)

	sql.WriteString(` WHERE alert_notification.org_id = ?`)
	params = append(params, query.OrgID)

	if query.Name != "" {
		sql.WriteString(` AND alert_notification.name = ?`)
		params = append(params, query.Name)
	}

	if query.Id != 0 {
		sql.WriteString(` AND alert_notification.id = ?`)
		params = append(params, strconv.Itoa(int(query.Id)))
	}

	if len(query.Ids) > 0 {
		sql.WriteString(` AND (`)

		for i, id := range query.Ids {
			if i != 0 {
				sql.WriteString(` OR`)
			}
			sql.WriteString(` alert_notification.id = ?`)
			params = append(params, id)
		}

		sql.WriteString(`)`)
	}

	var searches []*m.AlertNotification
	if err := sess.Sql(sql.String(), params...).Find(&searches); err != nil {
		return err
	}

	var result []*m.AlertNotification
	var def []*m.AlertNotification
	if query.IncludeAlwaysExecute {

		if err := sess.Where("org_id = ? AND always_execute = 1", query.OrgID).Find(&def); err != nil {
			return err
		}

		result = append(result, def...)
	}

	for _, s := range searches {
		canAppend := true
		for _, d := range result {
			if d.Id == s.Id {
				canAppend = false
				break
			}
		}

		if canAppend {
			result = append(result, s)
		}
	}

	query.Result = result
	return nil
}

func CreateAlertNotificationCommand(cmd *m.CreateAlertNotificationCommand) error {
	return inTransaction(func(sess *xorm.Session) error {
		existingQuery := &m.GetAlertNotificationQuery{OrgID: cmd.OrgID, Name: cmd.Name, IncludeAlwaysExecute: false}
		err := getAlertNotifications(existingQuery, sess)

		if err != nil {
			return err
		}

		if len(existingQuery.Result) > 0 {
			return fmt.Errorf("Alert notification name %s already exists", cmd.Name)
		}

		alertNotification := &m.AlertNotification{
			OrgId:         cmd.OrgID,
			Name:          cmd.Name,
			Type:          cmd.Type,
			Created:       time.Now(),
			Settings:      cmd.Settings,
			Updated:       time.Now(),
			AlwaysExecute: cmd.AlwaysExecute,
		}

		_, err = sess.Insert(alertNotification)

		if err != nil {
			return err
		}

		cmd.Result = alertNotification
		return nil
	})
}

func UpdateAlertNotification(cmd *m.UpdateAlertNotificationCommand) error {
	return inTransaction(func(sess *xorm.Session) (err error) {
		current := &m.AlertNotification{}
		_, err = sess.Id(cmd.Id).Get(current)

		if err != nil {
			return err
		}

		alertNotification := &m.AlertNotification{
			Id:            cmd.Id,
			OrgId:         cmd.OrgID,
			Name:          cmd.Name,
			Type:          cmd.Type,
			Settings:      cmd.Settings,
			Updated:       time.Now(),
			Created:       current.Created,
			AlwaysExecute: cmd.AlwaysExecute,
		}

		sess.UseBool("always_execute")

		var affected int64
		affected, err = sess.Id(alertNotification.Id).Update(alertNotification)

		if err != nil {
			return err
		}

		if affected == 0 {
			return fmt.Errorf("Could not find alert notification")
		}

		cmd.Result = alertNotification
		return nil
	})
}