keon94 commented on code in PR #4248:
URL: 
https://github.com/apache/incubator-devlake/pull/4248#discussion_r1149902270


##########
backend/plugins/pagerduty/tasks/incidents_collector.go:
##########
@@ -18,37 +18,137 @@ limitations under the License.
 package tasks
 
 import (
+       "encoding/json"
+       "fmt"
+       "github.com/apache/incubator-devlake/core/dal"
        "github.com/apache/incubator-devlake/core/errors"
        "github.com/apache/incubator-devlake/core/plugin"
-       helper "github.com/apache/incubator-devlake/helpers/pluginhelper/api"
-       "github.com/apache/incubator-devlake/helpers/pluginhelper/tap"
+       "github.com/apache/incubator-devlake/helpers/pluginhelper/api"
        "github.com/apache/incubator-devlake/plugins/pagerduty/models"
+       "net/http"
+       "net/url"
+       "reflect"
+       "time"
 )
 
 const RAW_INCIDENTS_TABLE = "pagerduty_incidents"
 
 var _ plugin.SubTaskEntryPoint = CollectIncidents
 
+type (
+       pagingInfo struct {
+               Limit  *int  `json:"limit"`
+               Offset *int  `json:"offset"`
+               Total  *int  `json:"total"`
+               More   *bool `json:"more"`
+       }
+       collectedIncidents struct {
+               pagingInfo
+               Incidents []json.RawMessage `json:"incidents"`
+       }
+
+       collectedIncident struct {
+               pagingInfo
+               Incident json.RawMessage `json:"incident"`
+       }
+       simplifiedRawIncident struct {
+               IncidentNumber int       `json:"incident_number"`
+               CreatedAt      time.Time `json:"created_at"`
+       }
+)
+
 func CollectIncidents(taskCtx plugin.SubTaskContext) errors.Error {
        data := taskCtx.GetData().(*PagerDutyTaskData)
-       collector, err := tap.NewTapCollector(
-               &tap.CollectorArgs[tap.SingerTapStream]{
-                       RawDataSubTaskArgs: helper.RawDataSubTaskArgs{
-                               Ctx:   taskCtx,
-                               Table: RAW_INCIDENTS_TABLE,
-                               Params: models.PagerDutyParams{
-                                       Stream:       models.IncidentStream,
-                                       ConnectionId: data.Options.ConnectionId,
+       db := taskCtx.GetDal()
+       args := api.RawDataSubTaskArgs{
+               Ctx: taskCtx,
+               Params: PagerDutyParams{
+                       ConnectionId: data.Options.ConnectionId,
+               },
+               Table: RAW_INCIDENTS_TABLE,
+       }
+       collector, err := 
api.NewStatefulApiCollectorForFinalizableEntity(api.FinalizableApiCollectorArgs{
+               RawDataSubTaskArgs: args,
+               ApiClient:          data.Client,
+               TimeAfter:          data.TimeAfter,
+               CollectNewRecordsByList: api.FinalizableApiCollectorListArgs{
+                       PageSize: 1,
+                       GetCreated: func(item json.RawMessage) (time.Time, 
errors.Error) {
+                               incident := &simplifiedRawIncident{}
+                               err := json.Unmarshal(item, incident)
+                               if err != nil {
+                                       return time.Time{}, 
errors.BadInput.Wrap(err, "failed to unmarshal incident")
+                               }
+                               return incident.CreatedAt, nil
+                       },
+                       FinalizableApiCollectorCommonArgs: 
api.FinalizableApiCollectorCommonArgs{
+                               UrlTemplate: "incidents",
+                               Query: func(reqData *api.RequestData, 
createdAfter *time.Time) (url.Values, errors.Error) {
+                                       query := url.Values{}
+                                       if createdAfter != nil {
+                                               now := time.Now()
+                                               if 
now.Sub(*createdAfter).Seconds() > 180*24*time.Hour.Seconds() {
+                                                       // beyond 6 months 
Pagerduty API will just return nothing, so need to query for 'all' instead
+                                                       query.Set("date_range", 
"all")
+                                               } else {
+                                                       query.Set("since", 
data.TimeAfter.String())

Review Comment:
   Yeah, I found this out through testing and experimentation. Their docs are 
not clear on what date this specifically means, but it's going to be the 
creation date. When I updated a property on the incident through their website, 
this value remained static, suggesting it is indeed the creation date. 



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