restructuring core package
- files are organized by functionality, not by class - structs / interfaces are defined in the file that first outputs them (not shure if i'll keep it, i'm experimenting with go's namespaces, bear with me)
This commit is contained in:
noerw
parent
dfbbe9d58f
commit
bf853e0ff4
7 changed files with 335 additions and 324 deletions
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@ -1,186 +0,0 @@
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package core
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import (
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"crypto/sha256"
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"encoding/hex"
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"fmt"
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log "github.com/sirupsen/logrus"
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"github.com/spf13/viper"
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)
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type CheckResult struct {
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Status string
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Event string
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Target string
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TargetName string
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Value string
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Threshold string
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}
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func (r CheckResult) EventID() string {
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s := fmt.Sprintf("%s%s%s", r.Event, r.Target, r.Threshold)
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hasher := sha256.New()
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hasher.Write([]byte(s))
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return hex.EncodeToString(hasher.Sum(nil))
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}
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func (r CheckResult) String() string {
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if r.Status == CheckOk {
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return fmt.Sprintf("%s %s (on sensor %s (%s) with value %s)\n", r.Event, r.Status, r.TargetName, r.Target, r.Value)
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} else {
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return fmt.Sprintf("%s: "+checkTypes[r.Event].description+"\n", r.Status, r.TargetName, r.Target, r.Value)
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}
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}
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type BoxCheckResults map[*Box][]CheckResult
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func (results BoxCheckResults) Size() int {
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size := 0
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for _, boxResults := range results {
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size += len(boxResults)
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}
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return size
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}
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func (results BoxCheckResults) Log() {
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for box, boxResults := range results {
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boxLog := log.WithFields(log.Fields{
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"boxId": box.Id,
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})
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countErr := 0
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for _, r := range boxResults {
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resultLog := boxLog.WithFields(log.Fields{
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"status": r.Status,
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"event": r.Event,
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"value": r.Value,
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"target": r.Target,
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})
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if r.Status == CheckOk {
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resultLog.Debugf("%s: %s", box.Name, r)
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} else {
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resultLog.Warnf("%s: %s", box.Name, r)
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countErr++
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}
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}
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if countErr == 0 {
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boxLog.Infof("%s: all is fine!", box.Name)
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}
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}
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}
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func (results BoxCheckResults) SendNotifications() error {
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// FIXME: don't return on errors, process all boxes first!
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results = results.FilterChangedFromCache(false)
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n := results.Size()
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if n == 0 {
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log.Info("No notifications due.")
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return nil
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} else {
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log.Infof("Notifying for %v checks turned bad in total...", results.Size())
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}
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for box, resultsDue := range results {
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if len(resultsDue) == 0 {
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continue
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}
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transport := box.NotifyConf.Notifications.Transport
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notifyLog := log.WithFields(log.Fields{
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"boxId": box.Id,
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"transport": transport,
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})
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notifier, err2 := box.GetNotifier()
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if err2 != nil {
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notifyLog.Error(err2)
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return err2
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}
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notification := notifier.ComposeNotification(box, resultsDue)
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err3 := notifier.Submit(notification)
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if err3 != nil {
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notifyLog.Error(err3)
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return err3
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}
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notifyLog.Infof("Sent notification for %s via %s with %v new issues", box.Name, transport, len(resultsDue))
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}
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return nil
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}
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func (results BoxCheckResults) FilterChangedFromCache(keepOk bool) BoxCheckResults {
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remaining := BoxCheckResults{}
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for box, boxResults := range results {
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// get results from cache. they are indexed by an event ID per boxId
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// filter, so that only changed result.Status remain
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remaining[box] = []CheckResult{}
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for _, result := range boxResults {
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cached := viper.GetStringMap(fmt.Sprintf("watchcache.%s.%s", box.Id, result.EventID()))
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if result.Status != cached["laststatus"] {
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if result.Status != CheckOk || keepOk {
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remaining[box] = append(remaining[box], result)
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}
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}
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}
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// TODO: reminder functionality: extract additional results with Status ERR
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// from cache with time.Since(lastNotifyDate) > remindAfter.
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// would require to serialize the full result..
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}
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// upate cache, setting lastNotifyDate to Now()
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for box, boxResults := range results {
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for _, result := range boxResults {
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// FIXME: somehow this is not persisted?
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key := fmt.Sprintf("watchcache.%s.%s", box.Id, result.EventID())
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viper.Set(key+".laststatus", result.Status)
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}
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}
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return remaining
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}
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func CheckBoxes(boxIds []string, defaultConf *NotifyConfig) (BoxCheckResults, error) {
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log.Debug("Checking notifications for ", len(boxIds), " box(es)")
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results := BoxCheckResults{}
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for _, boxId := range boxIds {
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box, res, err := checkBox(boxId, defaultConf)
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if err != nil {
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return nil, err
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}
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results[box] = res
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}
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return results, nil
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}
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func checkBox(boxId string, defaultConf *NotifyConfig) (*Box, []CheckResult, error) {
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boxLogger := log.WithFields(log.Fields{"boxId": boxId})
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boxLogger.Info("checking box for events")
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osem := NewOsemClient(viper.GetString("api"))
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// get box data
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box, err := osem.GetBox(boxId)
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if err != nil {
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boxLogger.Error(err)
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return nil, nil, err
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}
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// if box has no notify config, we use the defaultConf
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if box.NotifyConf == nil {
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box.NotifyConf = defaultConf
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}
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// run checks
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results, err2 := box.RunChecks()
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if err2 != nil {
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boxLogger.Error("could not run checks on box: ", err2)
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return box, results, err2
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}
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return box, results, nil
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}
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@ -1,34 +0,0 @@
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package core
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import (
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"errors"
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"net/http"
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"github.com/dghubble/sling"
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)
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type OsemError struct {
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Code int `json:"code"`
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Message string `json:"message"`
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}
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type OsemClient struct {
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sling *sling.Sling
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}
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func NewOsemClient(endpoint string) *OsemClient {
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return &OsemClient{
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sling: sling.New().Client(&http.Client{}).Base(endpoint),
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}
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}
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func (client *OsemClient) GetBox(boxId string) (*Box, error) {
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box := &Box{}
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fail := &OsemError{}
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client.sling.New().Path("boxes/").Path(boxId).Receive(box, fail)
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if fail.Message != "" {
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return box, errors.New("could not fetch box: " + fail.Message)
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}
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return box, nil
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}
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87
core/checkrunner.go
Normal file
87
core/checkrunner.go
Normal file
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@ -0,0 +1,87 @@
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package core
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import (
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log "github.com/sirupsen/logrus"
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"github.com/spf13/viper"
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)
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type BoxCheckResults map[*Box][]CheckResult
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func (results BoxCheckResults) Size() int {
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size := 0
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for _, boxResults := range results {
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size += len(boxResults)
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}
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return size
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}
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func (results BoxCheckResults) Log() {
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for box, boxResults := range results {
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boxLog := log.WithFields(log.Fields{
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"boxId": box.Id,
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})
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countErr := 0
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for _, r := range boxResults {
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resultLog := boxLog.WithFields(log.Fields{
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"status": r.Status,
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"event": r.Event,
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"value": r.Value,
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"target": r.Target,
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})
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if r.Status == CheckOk {
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resultLog.Debugf("%s: %s", box.Name, r)
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} else {
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resultLog.Warnf("%s: %s", box.Name, r)
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countErr++
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}
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}
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if countErr == 0 {
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boxLog.Infof("%s: all is fine!", box.Name)
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}
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}
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}
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func CheckBoxes(boxIds []string, defaultConf *NotifyConfig) (BoxCheckResults, error) {
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log.Debug("Checking notifications for ", len(boxIds), " box(es)")
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results := BoxCheckResults{}
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for _, boxId := range boxIds {
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// TODO: check boxes in parallel, capped at 5 at once
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box, res, err := checkBox(boxId, defaultConf)
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if err != nil {
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return nil, err
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}
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results[box] = res
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}
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return results, nil
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}
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func checkBox(boxId string, defaultConf *NotifyConfig) (*Box, []CheckResult, error) {
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boxLogger := log.WithFields(log.Fields{"boxId": boxId})
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boxLogger.Info("checking box for events")
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osem := NewOsemClient(viper.GetString("api"))
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// get box data
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box, err := osem.GetBox(boxId)
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if err != nil {
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boxLogger.Error(err)
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return nil, nil, err
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}
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// if box has no notify config, we use the defaultConf
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if box.NotifyConf == nil {
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box.NotifyConf = defaultConf
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}
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// run checks
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results, err2 := box.RunChecks()
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if err2 != nil {
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boxLogger.Error("could not run checks on box: ", err2)
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return box, results, err2
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}
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return box, results, nil
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}
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@ -1,6 +1,8 @@
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package core
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import (
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"crypto/sha256"
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"encoding/hex"
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"fmt"
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"strconv"
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"time"
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@ -37,35 +39,28 @@ var faultyVals = map[FaultyValue]bool{
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FaultyValue{sensor: "SDS 011", val: 0.0}: true,
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}
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type NotifyEvent struct {
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Type string `json:"type"`
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Target string `json:"target"`
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Threshold string `json:"threshold"`
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type CheckResult struct {
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Status string
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Event string
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Target string
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TargetName string
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Value string
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Threshold string
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}
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type TransportConfig struct {
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Transport string `json:"transport"`
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Options interface{} `json:"options"`
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func (r CheckResult) EventID() string {
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s := fmt.Sprintf("%s%s%s", r.Event, r.Target, r.Threshold)
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hasher := sha256.New()
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hasher.Write([]byte(s))
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return hex.EncodeToString(hasher.Sum(nil))
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}
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type NotifyConfig struct {
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Notifications TransportConfig `json:"notifications"`
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Events []NotifyEvent `json:"events"`
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}
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type Box struct {
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Id string `json:"_id"`
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Name string `json:"name"`
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Sensors []struct {
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Id string `json:"_id"`
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Phenomenon string `json:"title"`
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Type string `json:"sensorType"`
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LastMeasurement *struct {
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Value string `json:"value"`
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Date time.Time `json:"createdAt"`
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} `json:"lastMeasurement"`
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} `json:"sensors"`
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NotifyConf *NotifyConfig `json:"healthcheck"`
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func (r CheckResult) String() string {
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if r.Status == CheckOk {
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return fmt.Sprintf("%s %s (on sensor %s (%s) with value %s)\n", r.Event, r.Status, r.TargetName, r.Target, r.Value)
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} else {
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return fmt.Sprintf("%s: "+checkTypes[r.Event].description+"\n", r.Status, r.TargetName, r.Target, r.Value)
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}
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}
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func (box Box) RunChecks() ([]CheckResult, error) {
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@ -145,17 +140,3 @@ func (box Box) RunChecks() ([]CheckResult, error) {
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return results, nil
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}
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func (box Box) GetNotifier() (AbstractNotifier, error) {
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transport := box.NotifyConf.Notifications.Transport
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if transport == "" {
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return nil, fmt.Errorf("No notification transport provided")
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}
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notifier := notifiers[transport]
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if notifier == nil {
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return nil, fmt.Errorf("%s is not a supported notification transport", transport)
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}
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return notifier.New(box.NotifyConf.Notifications.Options)
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}
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84
core/notifier_email.go
Normal file
84
core/notifier_email.go
Normal file
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@ -0,0 +1,84 @@
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package core
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import (
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"errors"
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"fmt"
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"net/smtp"
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"strings"
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"time"
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"github.com/spf13/viper"
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)
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// box config required for the EmailNotifier
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type EmailNotifier struct {
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Recipients []string
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}
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func (n EmailNotifier) New(config interface{}) (AbstractNotifier, error) {
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// assign configuration to the notifier after ensuring the correct type.
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// lesson of this project: golang requires us to fuck around with type
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// assertions, instead of providing us with proper inheritance.
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asserted, ok := config.(EmailNotifier)
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if !ok || asserted.Recipients == nil {
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// config did not contain valid options.
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// first try fallback: parse result of viper is a map[string]interface{},
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// which requires a different assertion change
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asserted2, ok := config.(map[string]interface{})
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if ok {
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asserted3, ok := asserted2["recipients"].([]interface{})
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if ok {
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asserted = EmailNotifier{Recipients: []string{}}
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for _, rec := range asserted3 {
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asserted.Recipients = append(asserted.Recipients, rec.(string))
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}
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}
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}
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if asserted.Recipients == nil {
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return nil, errors.New("Invalid EmailNotifier options")
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}
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}
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return EmailNotifier{
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Recipients: asserted.Recipients,
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}, nil
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}
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func (n EmailNotifier) ComposeNotification(box *Box, checks []CheckResult) Notification {
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resultTexts := []string{}
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for _, check := range checks {
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resultTexts = append(resultTexts, check.String())
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}
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return Notification{
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subject: fmt.Sprintf("Issues with your box \"%s\" on opensensemap.org!", box.Name),
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body: fmt.Sprintf("A check at %s identified the following issue(s) with your box %s:\n\n%s\n\nYou may visit https://opensensemap.org/explore/%s for more details.\n\n--\nSent automatically by osem_notify (https://github.com/noerw/osem_notify)",
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time.Now().Round(time.Minute), box.Name, strings.Join(resultTexts, "\n"), box.Id),
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}
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}
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func (n EmailNotifier) Submit(notification Notification) error {
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auth := smtp.PlainAuth(
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"",
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viper.GetString("email.user"),
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viper.GetString("email.pass"),
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viper.GetString("email.host"),
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)
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from := viper.GetString("email.from")
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body := fmt.Sprintf("From: openSenseMap Notifier <%s>\nSubject: %s\nContent-Type: text/plain; charset=\"utf-8\"\n\n%s", from, notification.subject, notification.body)
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// Connect to the server, authenticate, set the sender and recipient,
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// and send the email all in one step.
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err := smtp.SendMail(
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fmt.Sprintf("%s:%s", viper.GetString("email.host"), viper.GetString("email.port")),
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auth,
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from,
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n.Recipients,
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[]byte(body),
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)
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return err
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}
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|
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@ -1,12 +1,9 @@
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package core
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|
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import (
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"errors"
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"fmt"
|
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"net/smtp"
|
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"strings"
|
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"time"
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|
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log "github.com/sirupsen/logrus"
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"github.com/spf13/viper"
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)
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|
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@ -25,75 +22,92 @@ type Notification struct {
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subject string
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}
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|
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// box config required for the EmailNotifier
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type EmailNotifier struct {
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Recipients []string
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//////
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|
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func (box Box) GetNotifier() (AbstractNotifier, error) {
|
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transport := box.NotifyConf.Notifications.Transport
|
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if transport == "" {
|
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return nil, fmt.Errorf("No notification transport provided")
|
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}
|
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|
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notifier := notifiers[transport]
|
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if notifier == nil {
|
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return nil, fmt.Errorf("%s is not a supported notification transport", transport)
|
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}
|
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|
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return notifier.New(box.NotifyConf.Notifications.Options)
|
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}
|
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|
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func (n EmailNotifier) New(config interface{}) (AbstractNotifier, error) {
|
||||
// assign configuration to the notifier after ensuring the correct type.
|
||||
// lesson of this project: golang requires us to fuck around with type
|
||||
// assertions, instead of providing us with proper inheritance.
|
||||
func (results BoxCheckResults) SendNotifications() error {
|
||||
// FIXME: don't return on errors, process all boxes first!
|
||||
// FIXME: only update cache when notifications sent successfully
|
||||
results = results.FilterChangedFromCache(false)
|
||||
|
||||
asserted, ok := config.(EmailNotifier)
|
||||
if !ok || asserted.Recipients == nil {
|
||||
// config did not contain valid options.
|
||||
// first try fallback: parse result of viper is a map[string]interface{},
|
||||
// which requires a different assertion change
|
||||
asserted2, ok := config.(map[string]interface{})
|
||||
if ok {
|
||||
asserted3, ok := asserted2["recipients"].([]interface{})
|
||||
if ok {
|
||||
asserted = EmailNotifier{Recipients: []string{}}
|
||||
for _, rec := range asserted3 {
|
||||
asserted.Recipients = append(asserted.Recipients, rec.(string))
|
||||
n := results.Size()
|
||||
if n == 0 {
|
||||
log.Info("No notifications due.")
|
||||
return nil
|
||||
} else {
|
||||
log.Infof("Notifying for %v checks turned bad in total...", results.Size())
|
||||
}
|
||||
|
||||
for box, resultsDue := range results {
|
||||
if len(resultsDue) == 0 {
|
||||
continue
|
||||
}
|
||||
|
||||
transport := box.NotifyConf.Notifications.Transport
|
||||
notifyLog := log.WithFields(log.Fields{
|
||||
"boxId": box.Id,
|
||||
"transport": transport,
|
||||
})
|
||||
|
||||
notifier, err2 := box.GetNotifier()
|
||||
if err2 != nil {
|
||||
notifyLog.Error(err2)
|
||||
return err2
|
||||
}
|
||||
notification := notifier.ComposeNotification(box, resultsDue)
|
||||
err3 := notifier.Submit(notification)
|
||||
if err3 != nil {
|
||||
notifyLog.Error(err3)
|
||||
return err3
|
||||
}
|
||||
notifyLog.Infof("Sent notification for %s via %s with %v new issues", box.Name, transport, len(resultsDue))
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func (results BoxCheckResults) FilterChangedFromCache(keepOk bool) BoxCheckResults {
|
||||
remaining := BoxCheckResults{}
|
||||
|
||||
for box, boxResults := range results {
|
||||
// get results from cache. they are indexed by an event ID per boxId
|
||||
// filter, so that only changed result.Status remain
|
||||
remaining[box] = []CheckResult{}
|
||||
for _, result := range boxResults {
|
||||
cached := viper.GetStringMap(fmt.Sprintf("watchcache.%s.%s", box.Id, result.EventID()))
|
||||
if result.Status != cached["laststatus"] {
|
||||
if result.Status != CheckOk || keepOk {
|
||||
remaining[box] = append(remaining[box], result)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if asserted.Recipients == nil {
|
||||
return nil, errors.New("Invalid EmailNotifier options")
|
||||
// TODO: reminder functionality: extract additional results with Status ERR
|
||||
// from cache with time.Since(lastNotifyDate) > remindAfter.
|
||||
// would require to serialize the full result..
|
||||
}
|
||||
|
||||
// upate cache, setting lastNotifyDate to Now()
|
||||
for box, boxResults := range results {
|
||||
for _, result := range boxResults {
|
||||
// FIXME: somehow this is not persisted?
|
||||
key := fmt.Sprintf("watchcache.%s.%s", box.Id, result.EventID())
|
||||
viper.Set(key+".laststatus", result.Status)
|
||||
}
|
||||
}
|
||||
|
||||
return EmailNotifier{
|
||||
Recipients: asserted.Recipients,
|
||||
}, nil
|
||||
}
|
||||
|
||||
func (n EmailNotifier) ComposeNotification(box *Box, checks []CheckResult) Notification {
|
||||
resultTexts := []string{}
|
||||
for _, check := range checks {
|
||||
resultTexts = append(resultTexts, check.String())
|
||||
}
|
||||
|
||||
return Notification{
|
||||
subject: fmt.Sprintf("Issues with your box \"%s\" on opensensemap.org!", box.Name),
|
||||
body: fmt.Sprintf("A check at %s identified the following issue(s) with your box %s:\n\n%s\n\nYou may visit https://opensensemap.org/explore/%s for more details.\n\n--\nSent automatically by osem_notify (https://github.com/noerw/osem_notify)",
|
||||
time.Now().Round(time.Minute), box.Name, strings.Join(resultTexts, "\n"), box.Id),
|
||||
}
|
||||
}
|
||||
|
||||
func (n EmailNotifier) Submit(notification Notification) error {
|
||||
auth := smtp.PlainAuth(
|
||||
"",
|
||||
viper.GetString("email.user"),
|
||||
viper.GetString("email.pass"),
|
||||
viper.GetString("email.host"),
|
||||
)
|
||||
|
||||
from := viper.GetString("email.from")
|
||||
body := fmt.Sprintf("From: openSenseMap Notifier <%s>\nSubject: %s\nContent-Type: text/plain; charset=\"utf-8\"\n\n%s", from, notification.subject, notification.body)
|
||||
|
||||
// Connect to the server, authenticate, set the sender and recipient,
|
||||
// and send the email all in one step.
|
||||
err := smtp.SendMail(
|
||||
fmt.Sprintf("%s:%s", viper.GetString("email.host"), viper.GetString("email.port")),
|
||||
auth,
|
||||
from,
|
||||
n.Recipients,
|
||||
[]byte(body),
|
||||
)
|
||||
|
||||
return err
|
||||
return remaining
|
||||
}
|
||||
|
|
|
|||
65
core/osem_api.go
Normal file
65
core/osem_api.go
Normal file
|
|
@ -0,0 +1,65 @@
|
|||
package core
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"net/http"
|
||||
"time"
|
||||
|
||||
"github.com/dghubble/sling"
|
||||
)
|
||||
|
||||
type OsemError struct {
|
||||
Code int `json:"code"`
|
||||
Message string `json:"message"`
|
||||
}
|
||||
|
||||
type OsemClient struct {
|
||||
sling *sling.Sling
|
||||
}
|
||||
|
||||
func NewOsemClient(endpoint string) *OsemClient {
|
||||
return &OsemClient{
|
||||
sling: sling.New().Client(&http.Client{}).Base(endpoint),
|
||||
}
|
||||
}
|
||||
|
||||
func (client *OsemClient) GetBox(boxId string) (*Box, error) {
|
||||
box := &Box{}
|
||||
fail := &OsemError{}
|
||||
client.sling.New().Path("boxes/").Path(boxId).Receive(box, fail)
|
||||
if fail.Message != "" {
|
||||
return box, errors.New("could not fetch box: " + fail.Message)
|
||||
}
|
||||
return box, nil
|
||||
}
|
||||
|
||||
type NotifyEvent struct {
|
||||
Type string `json:"type"`
|
||||
Target string `json:"target"`
|
||||
Threshold string `json:"threshold"`
|
||||
}
|
||||
|
||||
type TransportConfig struct {
|
||||
Transport string `json:"transport"`
|
||||
Options interface{} `json:"options"`
|
||||
}
|
||||
|
||||
type NotifyConfig struct {
|
||||
Notifications TransportConfig `json:"notifications"`
|
||||
Events []NotifyEvent `json:"events"`
|
||||
}
|
||||
|
||||
type Box struct {
|
||||
Id string `json:"_id"`
|
||||
Name string `json:"name"`
|
||||
Sensors []struct {
|
||||
Id string `json:"_id"`
|
||||
Phenomenon string `json:"title"`
|
||||
Type string `json:"sensorType"`
|
||||
LastMeasurement *struct {
|
||||
Value string `json:"value"`
|
||||
Date time.Time `json:"createdAt"`
|
||||
} `json:"lastMeasurement"`
|
||||
} `json:"sensors"`
|
||||
NotifyConf *NotifyConfig `json:"healthcheck"`
|
||||
}
|
||||
Loading…
Add table
Reference in a new issue