Find sink and ready conditions for untyped source (#911)

* Find sink and ready conditions for untyped source

 Fixes #909
 - Look up spec.sink field in untyped source unstructured object and
   try to convert it to duck Destination object
 - Look up status.conditions field in untyped source unstructured object and
   try to convert it to duck Conditions object
 - Upon not finding the data at expected fields, return "<unknown>"

* Add unit tests

* Update LICENSE header

pkg/kn/commands/source/duck/multisourcelist.go

@@ -15,6 +15,7 @@
 package duck
 
 import (
+	"encoding/json"
 	"fmt"
 	"strings"
 
@@ -24,9 +25,10 @@ import (
 	"k8s.io/apimachinery/pkg/runtime/schema"
 	sourcesv1alpha2 "knative.dev/eventing/pkg/apis/sources/v1alpha2"
 	duck "knative.dev/pkg/apis/duck"
+	duckv1 "knative.dev/pkg/apis/duck/v1"
 
 	"knative.dev/client/pkg/kn/commands"
-	"knative.dev/client/pkg/kn/commands/flags"
+	knflags "knative.dev/client/pkg/kn/commands/flags"
 )
 
 // Source struct holds common properties between different eventing sources
@@ -103,25 +105,77 @@ func getSourceTypeName(source *unstructured.Unstructured) string {
 	)
 }
 
+func sinkFromUnstructured(u *unstructured.Unstructured) (*duckv1.Destination, error) {
+	content := u.UnstructuredContent()
+	sink, found, err := unstructured.NestedFieldCopy(content, "spec", "sink")
+	if err != nil {
+		return nil, fmt.Errorf("cant find sink in given unstructured object at spec.sink field: %v", err)
+	}
+
+	if !found {
+		return nil, nil
+	}
+
+	sinkM, err := json.Marshal(sink)
+	if err != nil {
+		return nil, fmt.Errorf("error marshaling sink %v: %v", sink, err)
+	}
+
+	var sinkD duckv1.Destination
+	if err := json.Unmarshal(sinkM, &sinkD); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal source sink: %v", err)
+	}
+
+	return &sinkD, nil
+}
+
+func conditionsFromUnstructured(u *unstructured.Unstructured) (*duckv1.Conditions, error) {
+	content := u.UnstructuredContent()
+	conds, found, err := unstructured.NestedFieldCopy(content, "status", "conditions")
+	if !found || err != nil {
+		return nil, fmt.Errorf("cant find conditions in given unstructured object at status.conditions field: %v", err)
+	}
+
+	condsM, err := json.Marshal(conds)
+	if err != nil {
+		return nil, fmt.Errorf("error marshaling conditions %v: %v", conds, err)
+	}
+
+	var condsD duckv1.Conditions
+	if err := json.Unmarshal(condsM, &condsD); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal source status conditions: %v", err)
+	}
+
+	return &condsD, nil
+}
+
 func findSink(source *unstructured.Unstructured) string {
 	switch source.GetKind() {
 	case "ApiServerSource":
 		var apiSource sourcesv1alpha2.ApiServerSource
 		if err := duck.FromUnstructured(source, &apiSource); err == nil {
-			return flags.SinkToString(apiSource.Spec.Sink)
+			return knflags.SinkToString(apiSource.Spec.Sink)
 		}
 	case "SinkBinding":
 		var binding sourcesv1alpha2.SinkBinding
 		if err := duck.FromUnstructured(source, &binding); err == nil {
-			return flags.SinkToString(binding.Spec.Sink)
+			return knflags.SinkToString(binding.Spec.Sink)
 		}
 	case "PingSource":
 		var pingSource sourcesv1alpha2.PingSource
 		if err := duck.FromUnstructured(source, &pingSource); err == nil {
-			return flags.SinkToString(pingSource.Spec.Sink)
+			return knflags.SinkToString(pingSource.Spec.Sink)
 		}
+	default:
+		sink, err := sinkFromUnstructured(source)
+		if err != nil {
+			return "<unknown>"
+		}
+		if sink == nil {
+			return ""
+		}
+		return knflags.SinkToString(*sink)
 	}
-	// TODO: Find out how to find sink in untyped sources
 	return "<unknown>"
 }
 
@@ -142,7 +196,13 @@ func isReady(source *unstructured.Unstructured) string {
 		if err := duck.FromUnstructured(source, &tSource); err == nil {
 			return commands.ReadyCondition(tSource.Status.Conditions)
 		}
-	}
-	// TODO: Find out how to find ready conditions for untyped sources
+	default:
+		conds, err := conditionsFromUnstructured(source)
+		if err != nil {
+			// dont throw error in listing: if it cant find the status, return unknown
+			return "<unknown>"
+		}
+		return commands.ReadyCondition(*conds)
+	}
 	return "<unknown>"
 }

pkg/kn/commands/source/duck/multisourcelist_test.go

@@ -0,0 +1,160 @@
+/*
+Copyright 2020 The Knative Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package duck
+
+import (
+	"testing"
+
+	"gotest.tools/assert"
+	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
+	//"knative.dev/client/pkg/util"
+)
+
+func TestToSource(t *testing.T) {
+	s := toSource(newSourceUnstructuredObjWithSink("a1",
+		"sources.knative.dev/v1alpha1", "ApiServerSource"))
+	assert.Check(t, s.Name == "a1")
+	s = toSource(newSourceUnstructuredObjWithSink("s1",
+		"sources.knative.dev/v1alpha1", "SinkBinding"))
+	assert.Check(t, s.SourceKind == "SinkBinding")
+	s = toSource(newSourceUnstructuredObjWithSink("p1",
+		"sources.knative.dev/v1alpha1", "PingSource"))
+	assert.Check(t, s.Sink == "svc:foo")
+	s = toSource(newSourceUnstructuredObjWithSink("k1",
+		"sources.knative.dev/v1alpha1", "KafkaSource"))
+	assert.Check(t, s.Sink == "svc:foo")
+	s = toSource(newSourceUnstructuredObjWithoutSink("k1",
+		"sources.knative.dev/v1alpha1", "KafkaSource"))
+	assert.Check(t, s.Sink == "")
+}
+
+func TestSinkFromUnstructured(t *testing.T) {
+	s, e := sinkFromUnstructured(newSourceUnstructuredObjWithSink("k1",
+		"sources.knative.dev/v1alpha1", "KafkaSource"))
+	assert.NilError(t, e)
+	assert.Check(t, s != nil)
+
+	s, e = sinkFromUnstructured(newSourceUnstructuredObjWithoutSink("k1",
+		"sources.knative.dev/v1alpha1", "KafkaSource"))
+	assert.NilError(t, e)
+	assert.Check(t, s == nil)
+
+	s, e = sinkFromUnstructured(newSourceUnstructuredObjWithIncorrectSink("k1",
+		"sources.knative.dev/v1alpha1", "KafkaSource"))
+	assert.Check(t, e != nil)
+	assert.Check(t, s == nil)
+
+}
+
+func TestConditionsFromUnstructured(t *testing.T) {
+	_, e := conditionsFromUnstructured(newSourceUnstructuredObjWithSink("k1",
+		"sources.knative.dev/v1alpha1", "KafkaSource"))
+	assert.NilError(t, e)
+
+	_, e = conditionsFromUnstructured(newSourceUnstructuredObjWithoutConditions("k1",
+		"sources.knative.dev/v1alpha1", "KafkaSource"))
+	assert.Check(t, e != nil)
+
+}
+
+func newSourceUnstructuredObjWithSink(name, apiVersion, kind string) *unstructured.Unstructured {
+	return &unstructured.Unstructured{
+		Object: map[string]interface{}{
+			"apiVersion": apiVersion,
+			"kind":       kind,
+			"metadata": map[string]interface{}{
+				"namespace": "current",
+				"name":      name,
+			},
+			"spec": map[string]interface{}{
+				"sink": map[string]interface{}{
+					"ref": map[string]interface{}{
+						"kind": "Service",
+						"name": "foo",
+					},
+				},
+			},
+			"status": map[string]interface{}{
+				"conditions": []interface{}{
+					map[string]interface{}{
+						"Type":   "Ready",
+						"Status": "True",
+					},
+				},
+			},
+		},
+	}
+}
+
+func newSourceUnstructuredObjWithoutSink(name, apiVersion, kind string) *unstructured.Unstructured {
+	return &unstructured.Unstructured{
+		Object: map[string]interface{}{
+			"apiVersion": apiVersion,
+			"kind":       kind,
+			"metadata": map[string]interface{}{
+				"namespace": "current",
+				"name":      name,
+			},
+			"spec": map[string]interface{}{},
+			"status": map[string]interface{}{
+				"conditions": []interface{}{
+					map[string]interface{}{
+						"Type":   "Ready",
+						"Status": "False",
+						"Reason": "SinkMissing",
+					},
+				},
+			},
+		},
+	}
+}
+
+func newSourceUnstructuredObjWithIncorrectSink(name, apiVersion, kind string) *unstructured.Unstructured {
+	return &unstructured.Unstructured{
+		Object: map[string]interface{}{
+			"apiVersion": apiVersion,
+			"kind":       kind,
+			"metadata": map[string]interface{}{
+				"namespace": "current",
+				"name":      name,
+			},
+			"spec": map[string]interface{}{"sink": "incorrect"},
+		},
+	}
+}
+
+func newSourceUnstructuredObjWithoutConditions(name, apiVersion, kind string) *unstructured.Unstructured {
+	return &unstructured.Unstructured{
+		Object: map[string]interface{}{
+			"apiVersion": apiVersion,
+			"kind":       kind,
+			"metadata": map[string]interface{}{
+				"namespace": "current",
+				"name":      name,
+			},
+			"spec": map[string]interface{}{
+				"sink": map[string]interface{}{
+					"ref": map[string]interface{}{
+						"kind": "Service",
+						"name": "foo",
+					},
+				},
+			},
+			"status": map[string]interface{}{},
+		},
+	}
+}

pkg/kn/commands/source/list_test.go

@@ -82,9 +82,21 @@ func TestSourceList(t *testing.T) {
 	)
 	assert.NilError(t, err)
 	assert.Check(t, util.ContainsAll(output[0], "NAME", "TYPE", "RESOURCE", "SINK", "READY"))
-	assert.Check(t, util.ContainsAll(output[1], "a1", "ApiServerSource", "apiserversources.sources.knative.dev", "svc:foo", "<unknown>"))
-	assert.Check(t, util.ContainsAll(output[2], "p1", "PingSource", "pingsources.sources.knative.dev", "svc:foo", "<unknown>"))
-	assert.Check(t, util.ContainsAll(output[3], "s1", "SinkBinding", "sinkbindings.sources.knative.dev", "svc:foo", "<unknown>"))
+	assert.Check(t, util.ContainsAll(output[1], "a1", "ApiServerSource", "apiserversources.sources.knative.dev", "svc:foo", "True"))
+	assert.Check(t, util.ContainsAll(output[2], "p1", "PingSource", "pingsources.sources.knative.dev", "svc:foo", "True"))
+	assert.Check(t, util.ContainsAll(output[3], "s1", "SinkBinding", "sinkbindings.sources.knative.dev", "svc:foo", "True"))
+}
+
+func TestSourceListUntyped(t *testing.T) {
+	output, err := sourceFakeCmd([]string{"source", "list"},
+		newSourceCRDObjWithSpec("kafkasources", "sources.knative.dev", "v1alpha1", "KafkaSource"),
+		newSourceUnstructuredObj("k1", "sources.knative.dev/v1alpha1", "KafkaSource"),
+		newSourceUnstructuredObj("k2", "sources.knative.dev/v1alpha1", "KafkaSource"),
+	)
+	assert.NilError(t, err)
+	assert.Check(t, util.ContainsAll(output[0], "NAME", "TYPE", "RESOURCE", "SINK", "READY"))
+	assert.Check(t, util.ContainsAll(output[1], "k1", "KafkaSource", "kafkasources.sources.knative.dev", "svc:foo", "True"))
+	assert.Check(t, util.ContainsAll(output[2], "k2", "KafkaSource", "kafkasources.sources.knative.dev", "svc:foo", "True"))
 }
 
 func TestSourceListNoHeaders(t *testing.T) {
@@ -137,6 +149,14 @@ func newSourceUnstructuredObj(name, apiVersion, kind string) *unstructured.Unstr
 					},
 				},
 			},
+			"status": map[string]interface{}{
+				"conditions": []interface{}{
+					map[string]interface{}{
+						"Type":   "Ready",
+						"Status": "True",
+					},
+				},
+			},
 		},
 	}
 }