Add query parameters support to instance API

Add support for query parameters to find instances
with rb-name, rb-version, profile-name as query parameters
eg: curl IP:PORT/v1/instance?rb-name=test&rb-version=v1

Issue-ID: MULTICLOUD-662
Change-Id: If68c87885c8b8dd097cbb3860e8c7320310a6ef7
Signed-off-by: Kiran Kamineni <kiran.k.kamineni@intel.com>

6 files changed, 146 insertions, 177 deletions

diff --git a/src/k8splugin/api/api.go b/src/k8splugin/api/api.go
index 4308db4f..726bd116 100644
--- a/src/k8splugin/api/api.go
+++ b/src/k8splugin/api/api.go
@@ -39,6 +39,12 @@ func NewRouter(defClient rb.DefinitionManager,
 	instRouter := router.PathPrefix("/v1").Subrouter()
 	instRouter.HandleFunc("/instance", instHandler.createHandler).Methods("POST")
 	instRouter.HandleFunc("/instance", instHandler.listHandler).Methods("GET")
+	// Match rb-names, versions or profiles
+	instRouter.HandleFunc("/instance", instHandler.listHandler).
+		Queries("rb-name", "{rb-name}",
+			"rb-version", "{rb-version}",
+			"profile-name", "{profile-name}").Methods("GET")
+
 	instRouter.HandleFunc("/instance/{instID}", instHandler.getHandler).Methods("GET")
 	instRouter.HandleFunc("/instance/{instID}", instHandler.deleteHandler).Methods("DELETE")
 	// (TODO): Fix update method
diff --git a/src/k8splugin/api/brokerhandler_test.go b/src/k8splugin/api/brokerhandler_test.go
index 319c64e7..8ef5e184 100644
--- a/src/k8splugin/api/brokerhandler_test.go
+++ b/src/k8splugin/api/brokerhandler_test.go
@@ -285,7 +285,7 @@ func TestBrokerFindHandler(t *testing.T) {
 				},
 			},
 			instClient: &mockInstanceClient{
-				items: []app.InstanceResponse{
+				miniitems: []app.InstanceMiniResponse{
 					{
 						ID: "HaKpys8e",
 						Request: app.InstanceRequest{
@@ -295,22 +295,6 @@ func TestBrokerFindHandler(t *testing.T) {
 							CloudRegion: "region1",
 						},
 						Namespace: "testnamespace",
-						Resources: []helm.KubernetesResource{
-							{
-								GVK: schema.GroupVersionKind{
-									Group:   "apps",
-									Version: "v1",
-									Kind:    "Deployment"},
-								Name: "test-deployment",
-							},
-							{
-								GVK: schema.GroupVersionKind{
-									Group:   "",
-									Version: "v1",
-									Kind:    "Service"},
-								Name: "test-service",
-							},
-						},
 					},
 				},
 			},
diff --git a/src/k8splugin/api/instancehandler.go b/src/k8splugin/api/instancehandler.go
index 3ec055bc..be8e64fa 100644
--- a/src/k8splugin/api/instancehandler.go
+++ b/src/k8splugin/api/instancehandler.go
@@ -106,10 +106,16 @@ func (i instanceHandler) getHandler(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-// getHandler retrieves information about an instance via the ID
+// listHandler retrieves information about an instance via the ID
 func (i instanceHandler) listHandler(w http.ResponseWriter, r *http.Request) {
 
-	resp, err := i.client.List()
+	//If parameters are not provided, they are sent as empty strings
+	//Which will list all instances
+	rbName := r.FormValue("rb-name")
+	rbVersion := r.FormValue("rb-version")
+	ProfileName := r.FormValue("profile-name")
+
+	resp, err := i.client.List(rbName, rbVersion, ProfileName)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
 		return
diff --git a/src/k8splugin/api/instancehandler_test.go b/src/k8splugin/api/instancehandler_test.go
index 83fa3d2b..418054ec 100644
--- a/src/k8splugin/api/instancehandler_test.go
+++ b/src/k8splugin/api/instancehandler_test.go
@@ -60,7 +60,7 @@ func (m *mockInstanceClient) Get(id string) (app.InstanceResponse, error) {
 	return m.items[0], nil
 }
 
-func (m *mockInstanceClient) List() ([]app.InstanceMiniResponse, error) {
+func (m *mockInstanceClient) List(rbname, rbversion, profilename string) ([]app.InstanceMiniResponse, error) {
 	if m.err != nil {
 		return []app.InstanceMiniResponse{}, m.err
 	}
@@ -68,12 +68,12 @@ func (m *mockInstanceClient) List() ([]app.InstanceMiniResponse, error) {
 	return m.miniitems, nil
 }
 
-func (m *mockInstanceClient) Find(rbName string, ver string, profile string, labelKeys map[string]string) ([]app.InstanceResponse, error) {
+func (m *mockInstanceClient) Find(rbName string, ver string, profile string, labelKeys map[string]string) ([]app.InstanceMiniResponse, error) {
 	if m.err != nil {
 		return nil, m.err
 	}
 
-	return m.items, nil
+	return m.miniitems, nil
 }
 
 func (m *mockInstanceClient) Delete(id string) error {
@@ -312,6 +312,8 @@ func TestInstanceListHandler(t *testing.T) {
 		label            string
 		input            string
 		expectedCode     int
+		queryParams      bool
+		queryParamsMap   map[string]string
 		expectedResponse []app.InstanceMiniResponse
 		instClient       *mockInstanceClient
 	}{
@@ -373,11 +375,52 @@ func TestInstanceListHandler(t *testing.T) {
 				},
 			},
 		},
+		{
+			label:       "List Instances Based on Query Parameters",
+			queryParams: true,
+			queryParamsMap: map[string]string{
+				"rb-name": "test-rbdef1",
+			},
+			expectedCode: http.StatusOK,
+			expectedResponse: []app.InstanceMiniResponse{
+				{
+					ID: "HaKpys8e",
+					Request: app.InstanceRequest{
+						RBName:      "test-rbdef",
+						RBVersion:   "v1",
+						ProfileName: "profile1",
+						CloudRegion: "region1",
+					},
+					Namespace: "testnamespace",
+				},
+			},
+			instClient: &mockInstanceClient{
+				miniitems: []app.InstanceMiniResponse{
+					{
+						ID: "HaKpys8e",
+						Request: app.InstanceRequest{
+							RBName:      "test-rbdef",
+							RBVersion:   "v1",
+							ProfileName: "profile1",
+							CloudRegion: "region1",
+						},
+						Namespace: "testnamespace",
+					},
+				},
+			},
+		},
 	}
 
 	for _, testCase := range testCases {
 		t.Run(testCase.label, func(t *testing.T) {
 			request := httptest.NewRequest("GET", "/v1/instance", nil)
+			if testCase.queryParams {
+				q := request.URL.Query()
+				for k, v := range testCase.queryParamsMap {
+					q.Add(k, v)
+				}
+				request.URL.RawQuery = q.Encode()
+			}
 			resp := executeRequest(request, NewRouter(nil, nil, testCase.instClient, nil, nil, nil))
 
 			if testCase.expectedCode != resp.StatusCode {
diff --git a/src/k8splugin/internal/app/instance.go b/src/k8splugin/internal/app/instance.go
index 5cfdaea1..cf96d50c 100644
--- a/src/k8splugin/internal/app/instance.go
+++ b/src/k8splugin/internal/app/instance.go
@@ -60,8 +60,8 @@ type InstanceMiniResponse struct {
 type InstanceManager interface {
 	Create(i InstanceRequest) (InstanceResponse, error)
 	Get(id string) (InstanceResponse, error)
-	List() ([]InstanceMiniResponse, error)
-	Find(rbName string, ver string, profile string, labelKeys map[string]string) ([]InstanceResponse, error)
+	List(rbname, rbversion, profilename string) ([]InstanceMiniResponse, error)
+	Find(rbName string, ver string, profile string, labelKeys map[string]string) ([]InstanceMiniResponse, error)
 	Delete(id string) error
 }
 
@@ -184,7 +184,7 @@ func (v *InstanceClient) Get(id string) (InstanceResponse, error) {
 
 // List returns the instance for corresponding ID
 // Empty string returns all
-func (v *InstanceClient) List() ([]InstanceMiniResponse, error) {
+func (v *InstanceClient) List(rbname, rbversion, profilename string) ([]InstanceMiniResponse, error) {
 
 	dbres, err := db.DBconn.ReadAll(v.storeName, v.tagInst)
 	if err != nil || len(dbres) == 0 {
@@ -192,6 +192,7 @@ func (v *InstanceClient) List() ([]InstanceMiniResponse, error) {
 	}
 
 	var results []InstanceMiniResponse
+
 	for key, value := range dbres {
 		//value is a byte array
 		if value != nil {
@@ -206,6 +207,21 @@ func (v *InstanceClient) List() ([]InstanceMiniResponse, error) {
 				Request:   resp.Request,
 				Namespace: resp.Namespace,
 			}
+
+			//Filter based on the accepted keys
+			if len(rbname) != 0 &&
+				miniresp.Request.RBName != rbname {
+				continue
+			}
+			if len(rbversion) != 0 &&
+				miniresp.Request.RBVersion != rbversion {
+				continue
+			}
+			if len(profilename) != 0 &&
+				miniresp.Request.ProfileName != profilename {
+				continue
+			}
+
 			results = append(results, miniresp)
 		}
 	}
@@ -218,70 +234,36 @@ func (v *InstanceClient) List() ([]InstanceMiniResponse, error) {
 // If profile is empty, it will return all instances for a given rbName+version
 // If labelKeys are provided, the results are filtered based on that.
 // It is an AND operation for labelkeys.
-func (v *InstanceClient) Find(rbName string, version string, profile string, labelKeys map[string]string) ([]InstanceResponse, error) {
+func (v *InstanceClient) Find(rbName string, version string, profile string, labelKeys map[string]string) ([]InstanceMiniResponse, error) {
 	if rbName == "" && len(labelKeys) == 0 {
-		return []InstanceResponse{}, pkgerrors.New("rbName or labelkeys is required and cannot be empty")
+		return []InstanceMiniResponse{}, pkgerrors.New("rbName or labelkeys is required and cannot be empty")
 	}
 
-	values, err := db.DBconn.ReadAll(v.storeName, v.tagInst)
-	if err != nil || len(values) == 0 {
-		return []InstanceResponse{}, pkgerrors.Wrap(err, "Find Instance")
+	responses, err := v.List(rbName, version, profile)
+	if err != nil {
+		return []InstanceMiniResponse{}, pkgerrors.Wrap(err, "Listing Instances")
 	}
 
-	response := []InstanceResponse{}
-	//values is a map[string][]byte
-InstanceResponseLoop:
-	for _, value := range values {
-		resp := InstanceResponse{}
-		db.DBconn.Unmarshal(value, &resp)
-		if err != nil {
-			return []InstanceResponse{}, pkgerrors.Wrap(err, "Unmarshaling Instance Value")
-		}
+	ret := []InstanceMiniResponse{}
 
-		// Filter by labels provided
-		if len(labelKeys) != 0 {
-			for lkey, lvalue := range labelKeys {
-				//Check if label key exists and get its value
-				if val, ok := resp.Request.Labels[lkey]; ok {
-					if lvalue != val {
-						continue InstanceResponseLoop
-					}
-				} else {
-					continue InstanceResponseLoop
-				}
-			}
-		}
+	//filter the list by labelKeys now
+	for _, resp := range responses {
 
-		if rbName != "" {
-			if resp.Request.RBName == rbName {
-
-				//Check if a version is provided and if it matches
-				if version != "" {
-					if resp.Request.RBVersion == version {
-						//Check if a profilename matches or if it is not provided
-						if profile == "" || resp.Request.ProfileName == profile {
-							response = append(response, resp)
-						}
-					}
-				} else {
-					//Append all versions as version is not provided
-					response = append(response, resp)
-				}
+		add := true
+		for k, v := range labelKeys {
+			if resp.Request.Labels[k] != v {
+				add = false
+				break
 			}
-		} else {
-			response = append(response, resp)
 		}
-	}
-
-	//filter the list by labelKeys now
-	for _, value := range response {
-		for _, label := range labelKeys {
-			if _, ok := value.Request.Labels[label]; ok {
-			}
+		// If label was not found in the response, don't add it
+		if add {
+			ret = append(ret, resp)
 		}
+
 	}
 
-	return response, nil
+	return ret, nil
 }
 
 // Delete the Instance from database
diff --git a/src/k8splugin/internal/app/instance_test.go b/src/k8splugin/internal/app/instance_test.go
index 3cb62ee1..b79cf388 100644
--- a/src/k8splugin/internal/app/instance_test.go
+++ b/src/k8splugin/internal/app/instance_test.go
@@ -434,7 +434,7 @@ func TestInstanceFind(t *testing.T) {
 			Items: items,
 		}
 
-		expected := []InstanceResponse{
+		expected := []InstanceMiniResponse{
 			{
 				ID: "HaKpys8e",
 				Request: InstanceRequest{
@@ -447,22 +447,6 @@ func TestInstanceFind(t *testing.T) {
 					},
 				},
 				Namespace: "testnamespace",
-				Resources: []helm.KubernetesResource{
-					{
-						GVK: schema.GroupVersionKind{
-							Group:   "apps",
-							Version: "v1",
-							Kind:    "Deployment"},
-						Name: "deployment-1",
-					},
-					{
-						GVK: schema.GroupVersionKind{
-							Group:   "",
-							Version: "v1",
-							Kind:    "Service"},
-						Name: "service-1",
-					},
-				},
 			},
 			{
 				ID: "HaKpys8f",
@@ -473,22 +457,6 @@ func TestInstanceFind(t *testing.T) {
 					CloudRegion: "region1",
 				},
 				Namespace: "testnamespace",
-				Resources: []helm.KubernetesResource{
-					{
-						GVK: schema.GroupVersionKind{
-							Group:   "apps",
-							Version: "v1",
-							Kind:    "Deployment"},
-						Name: "deployment-1",
-					},
-					{
-						GVK: schema.GroupVersionKind{
-							Group:   "",
-							Version: "v1",
-							Kind:    "Service"},
-						Name: "service-1",
-					},
-				},
 			},
 			{
 				ID: "HaKpys8g",
@@ -499,22 +467,6 @@ func TestInstanceFind(t *testing.T) {
 					CloudRegion: "region1",
 				},
 				Namespace: "testnamespace",
-				Resources: []helm.KubernetesResource{
-					{
-						GVK: schema.GroupVersionKind{
-							Group:   "apps",
-							Version: "v1",
-							Kind:    "Deployment"},
-						Name: "deployment-1",
-					},
-					{
-						GVK: schema.GroupVersionKind{
-							Group:   "",
-							Version: "v1",
-							Kind:    "Service"},
-						Name: "service-1",
-					},
-				},
 			},
 		}
 		ic := NewInstanceClient()
@@ -541,12 +493,12 @@ func TestInstanceFind(t *testing.T) {
 		}
 	})
 
-	t.Run("Successfully Find Instance By Name Version", func(t *testing.T) {
+	t.Run("Successfully Find Instance By Name and Label", func(t *testing.T) {
 		db.DBconn = &db.MockDB{
 			Items: items,
 		}
 
-		expected := []InstanceResponse{
+		expected := []InstanceMiniResponse{
 			{
 				ID: "HaKpys8e",
 				Request: InstanceRequest{
@@ -559,23 +511,53 @@ func TestInstanceFind(t *testing.T) {
 					},
 				},
 				Namespace: "testnamespace",
+			},
+		}
+		ic := NewInstanceClient()
+		name := "test-rbdef"
+		labels := map[string]string{
+			"vf_module_id": "test-vf-module-id",
+		}
+		data, err := ic.Find(name, "", "", labels)
+		if err != nil {
+			t.Fatalf("TestInstanceFind returned an error (%s)", err)
+		}
 
-				Resources: []helm.KubernetesResource{
-					{
-						GVK: schema.GroupVersionKind{
-							Group:   "apps",
-							Version: "v1",
-							Kind:    "Deployment"},
-						Name: "deployment-1",
-					},
-					{
-						GVK: schema.GroupVersionKind{
-							Group:   "",
-							Version: "v1",
-							Kind:    "Service"},
-						Name: "service-1",
+		// Since the order of returned slice is not guaranteed
+		// Check both and return error if both don't match
+		sort.Slice(data, func(i, j int) bool {
+			return data[i].ID < data[j].ID
+		})
+		// Sort both as it is not expected that testCase.expected
+		// is sorted
+		sort.Slice(expected, func(i, j int) bool {
+			return expected[i].ID < expected[j].ID
+		})
+
+		if !reflect.DeepEqual(expected, data) {
+			t.Fatalf("TestInstanceFind returned:\n result=%v\n expected=%v",
+				data, expected)
+		}
+	})
+
+	t.Run("Successfully Find Instance By Name Version", func(t *testing.T) {
+		db.DBconn = &db.MockDB{
+			Items: items,
+		}
+
+		expected := []InstanceMiniResponse{
+			{
+				ID: "HaKpys8e",
+				Request: InstanceRequest{
+					RBName:      "test-rbdef",
+					RBVersion:   "v1",
+					ProfileName: "profile1",
+					CloudRegion: "region1",
+					Labels: map[string]string{
+						"vf_module_id": "test-vf-module-id",
 					},
 				},
+				Namespace: "testnamespace",
 			},
 			{
 				ID: "HaKpys8f",
@@ -586,23 +568,6 @@ func TestInstanceFind(t *testing.T) {
 					CloudRegion: "region1",
 				},
 				Namespace: "testnamespace",
-
-				Resources: []helm.KubernetesResource{
-					{
-						GVK: schema.GroupVersionKind{
-							Group:   "apps",
-							Version: "v1",
-							Kind:    "Deployment"},
-						Name: "deployment-1",
-					},
-					{
-						GVK: schema.GroupVersionKind{
-							Group:   "",
-							Version: "v1",
-							Kind:    "Service"},
-						Name: "service-1",
-					},
-				},
 			},
 		}
 		ic := NewInstanceClient()
@@ -634,7 +599,7 @@ func TestInstanceFind(t *testing.T) {
 			Items: items,
 		}
 
-		expected := []InstanceResponse{
+		expected := []InstanceMiniResponse{
 			{
 				ID: "HaKpys8e",
 				Request: InstanceRequest{
@@ -647,23 +612,6 @@ func TestInstanceFind(t *testing.T) {
 					},
 				},
 				Namespace: "testnamespace",
-
-				Resources: []helm.KubernetesResource{
-					{
-						GVK: schema.GroupVersionKind{
-							Group:   "apps",
-							Version: "v1",
-							Kind:    "Deployment"},
-						Name: "deployment-1",
-					},
-					{
-						GVK: schema.GroupVersionKind{
-							Group:   "",
-							Version: "v1",
-							Kind:    "Service"},
-						Name: "service-1",
-					},
-				},
 			},
 		}
 		ic := NewInstanceClient()