Added dashboard

pkg/api/check/check.go

@@ -0,0 +1,93 @@
+package check
+
+import (
+	"encoding/json"
+	"net/http"
+
+	log "github.com/sirupsen/logrus"
+
+	"github.com/containrrr/watchtower/pkg/container"
+	"github.com/containrrr/watchtower/pkg/types"
+)
+
+// Handler is an HTTP handle for serving list data
+type Handler struct {
+	Path   string
+	Client container.Client
+}
+
+type CheckRequest struct {
+	ContainerId string
+}
+
+type CheckResponse struct {
+	ContainerId       string
+	HasUpdate         bool
+	NewVersion        string
+	NewVersionCreated string
+}
+
+// New is a factory function creating a new List instance
+func New(client container.Client) *Handler {
+	return &Handler{
+		Path:   "/v1/check",
+		Client: client,
+	}
+}
+
+// HandlePost is the actual http.HandlePost function doing all the heavy lifting
+func (handle *Handler) HandlePost(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		log.Info("Calling Check API with unsupported method")
+		w.WriteHeader(http.StatusNotFound)
+		return
+	}
+
+	log.Info("Check for update triggered by HTTP API request.")
+
+	var request CheckRequest
+	err := json.NewDecoder(r.Body).Decode(&request)
+	if err != nil {
+		log.Error(err)
+		w.WriteHeader(http.StatusInternalServerError)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	client := handle.Client
+	container, err := client.GetContainer(types.ContainerID(request.ContainerId))
+	if err != nil {
+		log.Error(err)
+		w.WriteHeader(http.StatusInternalServerError)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	stale, newestImage, created, err := client.IsContainerStale(container)
+
+	if err != nil {
+		log.Error(err)
+		w.WriteHeader(http.StatusInternalServerError)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	data := CheckResponse{
+		ContainerId:       request.ContainerId,
+		HasUpdate:         stale,
+		NewVersion:        newestImage.ShortID(),
+		NewVersionCreated: created,
+	}
+
+	jsonData, err := json.Marshal(data)
+	if err != nil {
+		log.Fatalf("Error happened in JSON marshal. Err: %s", err)
+		w.WriteHeader(http.StatusInternalServerError)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	w.Write(jsonData)
+}