added models and getting information from woodpecker

internal/woodpecker/metrics.go

@@ -1,7 +1,59 @@
 package woodpecker
 
-import "git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler/internal/config"
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
 
-func GetPendingJobs(cfg *config.Config) {
+	"git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler/internal/config"
+	"git.uploadfilter24.eu/covidnetes/woodpecker-autoscaler/internal/models"
 
+	log "github.com/sirupsen/logrus"
+)
+
+func QueueInfo(cfg *config.Config, target interface{}) error {
+	apiRoute := fmt.Sprintf("%s/api/queue/info", cfg.WoodpeckerInstance)
+	req, err := http.NewRequest("GET", apiRoute, nil)
+	if err != nil {
+		return errors.New(fmt.Sprintf("Could not create queue request: %s", err.Error()))
+	}
+	req.Header.Set("Accept", "application/json")
+	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", cfg.WoodpeckerApiToken))
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return errors.New(fmt.Sprintf("Could not query queue info: %s", err.Error()))
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != 200 {
+		return errors.New(fmt.Sprintf("Error from queue info api: %s", err.Error()))
+	}
+
+	return json.NewDecoder(resp.Body).Decode(target)
+}
+
+func CheckPending(cfg *config.Config) error {
+	queueInfo := new(models.QueueInfo)
+	err := QueueInfo(cfg, queueInfo)
+	if err != nil {
+		return errors.New(fmt.Sprintf("Error from QueueInfo: %s", err.Error()))
+	}
+	if queueInfo.Stats.PendingCount > 0 {
+		for _, pendingJobs := range queueInfo.Pending {
+			// TODO: separate key and value from LabelSelector and compare them deeply
+			_, exists := pendingJobs.Labels[cfg.LabelSelector]
+			if exists {
+				log.WithFields(log.Fields{
+					"Caller": "CheckPending",
+				}).Info("Found pending job for us. Requesting new Agent")
+			} else {
+				log.WithFields(log.Fields{
+					"Caller": "CheckPending",
+				}).Info("No Jobs for us in Queue")
+			}
+		}
+	}
+	return nil
 }