Enhance the status query API

This patch enhances the status query API.
- The ResourceBundleState CRD is modified to just use the
  k8s Pod structure instead of a customized struct.
- Status queries can either present results showing
  the rsync status of the composite app and resources
  or from information received from the cluster via
  the ResourceBundleState CR
- Query parameters are provided to the API call to
  customize the query and response
- Support for querying status of cluster network
  intents is added

Issue-ID: MULTICLOUD-1042
Signed-off-by: Eric Multanen <eric.w.multanen@intel.com>
Change-Id: Icca4cdd901e2f2b446414fade256fc24d87594cd

2 files changed, 113 insertions, 1 deletions

diff --git a/src/ncm/api/api.go b/src/ncm/api/api.go
index 6dd958a1..45551e6c 100644
--- a/src/ncm/api/api.go
+++ b/src/ncm/api/api.go
@@ -90,6 +90,9 @@ func NewRouter(testClient interface{}) *mux.Router {
 	}
 	router.HandleFunc("/cluster-providers/{cluster-provider}/clusters/{cluster}/apply", schedulerHandler.applySchedulerHandler).Methods("POST")
 	router.HandleFunc("/cluster-providers/{cluster-provider}/clusters/{cluster}/terminate", schedulerHandler.terminateSchedulerHandler).Methods("POST")
+	router.HandleFunc("/cluster-providers/{cluster-provider}/clusters/{cluster}/status", schedulerHandler.statusSchedulerHandler).Methods("GET")
+	router.HandleFunc("/cluster-providers/{cluster-provider}/clusters/{cluster}/status",
+		schedulerHandler.statusSchedulerHandler).Queries("instance", "{instance}", "type", "{type}", "output", "{output}", "app", "{app}", "cluster", "{cluster}", "resource", "{resource}")
 
 	return router
 }
diff --git a/src/ncm/api/schedulerhandler.go b/src/ncm/api/schedulerhandler.go
index d07d132d..9d8b4eff 100644
--- a/src/ncm/api/schedulerhandler.go
+++ b/src/ncm/api/schedulerhandler.go
@@ -17,9 +17,13 @@
 package api
 
 import (
+	"encoding/json"
 	"net/http"
+	"net/url"
+	"strings"
 
 	"github.com/onap/multicloud-k8s/src/ncm/pkg/scheduler"
+	"github.com/onap/multicloud-k8s/src/orchestrator/pkg/infra/validation"
 
 	"github.com/gorilla/mux"
 )
@@ -47,7 +51,7 @@ func (h schedulerHandler) applySchedulerHandler(w http.ResponseWriter, r *http.R
 	w.WriteHeader(http.StatusNoContent)
 }
 
-//  terminateSchedulerHandler handles requests to apply network intents for a cluster
+//  terminateSchedulerHandler handles requests to terminate network intents for a cluster
 func (h schedulerHandler) terminateSchedulerHandler(w http.ResponseWriter, r *http.Request) {
 	vars := mux.Vars(r)
 	provider := vars["cluster-provider"]
@@ -61,3 +65,108 @@ func (h schedulerHandler) terminateSchedulerHandler(w http.ResponseWriter, r *ht
 
 	w.WriteHeader(http.StatusNoContent)
 }
+
+//  statusSchedulerHandler handles requests to query status of network intents for a cluster
+func (h schedulerHandler) statusSchedulerHandler(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	provider := vars["cluster-provider"]
+	cluster := vars["cluster"]
+
+	qParams, err := url.ParseQuery(r.URL.RawQuery)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	var queryInstance string
+	if i, found := qParams["instance"]; found {
+		queryInstance = i[0]
+	} else {
+		queryInstance = "" // default type
+	}
+
+	var queryType string
+	if t, found := qParams["type"]; found {
+		queryType = t[0]
+		if queryType != "cluster" && queryType != "rsync" {
+			http.Error(w, "Invalid query type", http.StatusBadRequest)
+			return
+		}
+	} else {
+		queryType = "rsync" // default type
+	}
+
+	var queryOutput string
+	if o, found := qParams["output"]; found {
+		queryOutput = o[0]
+		if queryOutput != "summary" && queryOutput != "all" && queryOutput != "detail" {
+			http.Error(w, "Invalid query output", http.StatusBadRequest)
+			return
+		}
+	} else {
+		queryOutput = "all" // default output format
+	}
+
+	var queryApps []string
+	if a, found := qParams["app"]; found {
+		queryApps = a
+		for _, app := range queryApps {
+			errs := validation.IsValidName(app)
+			if len(errs) > 0 {
+				http.Error(w, "Invalid app query", http.StatusBadRequest)
+				return
+			}
+		}
+	} else {
+		queryApps = make([]string, 0)
+	}
+
+	var queryClusters []string
+	if c, found := qParams["cluster"]; found {
+		queryClusters = c
+		for _, cl := range queryClusters {
+			parts := strings.Split(cl, "+")
+			if len(parts) != 2 {
+				http.Error(w, "Invalid cluster query", http.StatusBadRequest)
+				return
+			}
+			for _, p := range parts {
+				errs := validation.IsValidName(p)
+				if len(errs) > 0 {
+					http.Error(w, "Invalid cluster query", http.StatusBadRequest)
+					return
+				}
+			}
+		}
+	} else {
+		queryClusters = make([]string, 0)
+	}
+
+	var queryResources []string
+	if r, found := qParams["resource"]; found {
+		queryResources = r
+		for _, res := range queryResources {
+			errs := validation.IsValidName(res)
+			if len(errs) > 0 {
+				http.Error(w, "Invalid resources query", http.StatusBadRequest)
+				return
+			}
+		}
+	} else {
+		queryResources = make([]string, 0)
+	}
+
+	status, iErr := h.client.NetworkIntentsStatus(provider, cluster, queryInstance, queryType, queryOutput, queryApps, queryClusters, queryResources)
+	if iErr != nil {
+		http.Error(w, iErr.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	iErr = json.NewEncoder(w).Encode(status)
+	if iErr != nil {
+		http.Error(w, iErr.Error(), http.StatusInternalServerError)
+		return
+	}
+}