[Fix] Trigger 'unlabeled' event when label is Deleted from PR

modules/actions/workflows.go

@@ -362,21 +362,40 @@ func matchIssuesEvent(issuePayload *api.IssuePayload, evt *jobparser.Event) bool
 			// Actions with the same name:
 			// opened, edited, closed, reopened, assigned, unassigned, milestoned, demilestoned
 			// Actions need to be converted:
-			// label_updated -> labeled
+			// label_updated -> labeled (when adding) or unlabeled (when removing)
 			// label_cleared -> unlabeled
 			// Unsupported activity types:
 			// deleted, transferred, pinned, unpinned, locked, unlocked
 
-			action := issuePayload.Action
-			switch action {
+			actions := []string{}
+			switch issuePayload.Action {
 			case api.HookIssueLabelUpdated:
-				action = "labeled"
+				// Check if both labels were added and removed to determine events to fire
+				if len(issuePayload.Issue.Labels) > 0 && len(issuePayload.RemovedLabels) > 0 {
+					// Both labeled and unlabeled events should be triggered
+					actions = append(actions, "labeled", "unlabeled")
+				} else if len(issuePayload.RemovedLabels) > 0 {
+					// Only labels were removed
+					actions = append(actions, "unlabeled")
+				} else {
+					// Only labels were added
+					actions = append(actions, "labeled")
+				}
 			case api.HookIssueLabelCleared:
-				action = "unlabeled"
+				actions = append(actions, "unlabeled")
+			default:
+				actions = append(actions, string(issuePayload.Action))
 			}
+
 			for _, val := range vals {
-				if glob.MustCompile(val, '/').Match(string(action)) {
-					matchTimes++
+				for _, action := range actions {
+					if glob.MustCompile(val, '/').Match(action) {
+						matchTimes++
+						break
+					}
+				}
+				// Once a match is found for this value, we can move to the next one
+				if matchTimes > 0 {
 					break
 				}
 			}

modules/actions/workflows_test.go

@@ -136,3 +136,159 @@ func TestDetectMatched(t *testing.T) {
 		})
 	}
 }
+
+func TestMatchIssuesEvent(t *testing.T) {
+	testCases := []struct {
+		desc      string
+		payload   *api.IssuePayload
+		yamlOn    string
+		expected  bool
+		eventType string
+	}{
+		{
+			desc: "Label deletion should trigger unlabeled event",
+			payload: &api.IssuePayload{
+				Action: api.HookIssueLabelUpdated,
+				Issue: &api.Issue{
+					Labels: []*api.Label{},
+				},
+				RemovedLabels: []*api.Label{
+					{ID: 123, Name: "deleted-label"},
+				},
+			},
+			yamlOn:    "on:\n  issues:\n    types: [unlabeled]",
+			expected:  true,
+			eventType: "unlabeled",
+		},
+		{
+			desc: "Label deletion with existing labels should trigger unlabeled event",
+			payload: &api.IssuePayload{
+				Action: api.HookIssueLabelUpdated,
+				Issue: &api.Issue{
+					Labels: []*api.Label{
+						{ID: 456, Name: "existing-label"},
+					},
+				},
+				RemovedLabels: []*api.Label{
+					{ID: 123, Name: "deleted-label"},
+				},
+			},
+			yamlOn:    "on:\n  issues:\n    types: [unlabeled]",
+			expected:  true,
+			eventType: "unlabeled",
+		},
+		{
+			desc: "Label addition should trigger labeled event",
+			payload: &api.IssuePayload{
+				Action: api.HookIssueLabelUpdated,
+				Issue: &api.Issue{
+					Labels: []*api.Label{
+						{ID: 123, Name: "new-label"},
+					},
+				},
+				RemovedLabels: []*api.Label{}, // Empty array, no labels removed
+			},
+			yamlOn:    "on:\n  issues:\n    types: [labeled]",
+			expected:  true,
+			eventType: "labeled",
+		},
+		{
+			desc: "Label clear should trigger unlabeled event",
+			payload: &api.IssuePayload{
+				Action: api.HookIssueLabelCleared,
+				Issue: &api.Issue{
+					Labels: []*api.Label{},
+				},
+			},
+			yamlOn:    "on:\n  issues:\n    types: [unlabeled]",
+			expected:  true,
+			eventType: "unlabeled",
+		},
+		{
+			desc: "Both adding and removing labels should trigger labeled event",
+			payload: &api.IssuePayload{
+				Action: api.HookIssueLabelUpdated,
+				Issue: &api.Issue{
+					Labels: []*api.Label{
+						{ID: 789, Name: "new-label"},
+					},
+				},
+				RemovedLabels: []*api.Label{
+					{ID: 123, Name: "deleted-label"},
+				},
+			},
+			yamlOn:    "on:\n  issues:\n    types: [labeled]",
+			expected:  true,
+			eventType: "labeled",
+		},
+		{
+			desc: "Both adding and removing labels should trigger unlabeled event",
+			payload: &api.IssuePayload{
+				Action: api.HookIssueLabelUpdated,
+				Issue: &api.Issue{
+					Labels: []*api.Label{
+						{ID: 789, Name: "new-label"},
+					},
+				},
+				RemovedLabels: []*api.Label{
+					{ID: 123, Name: "deleted-label"},
+				},
+			},
+			yamlOn:    "on:\n  issues:\n    types: [unlabeled]",
+			expected:  true,
+			eventType: "unlabeled",
+		},
+		{
+			desc: "Both adding and removing labels should trigger both events",
+			payload: &api.IssuePayload{
+				Action: api.HookIssueLabelUpdated,
+				Issue: &api.Issue{
+					Labels: []*api.Label{
+						{ID: 789, Name: "new-label"},
+					},
+				},
+				RemovedLabels: []*api.Label{
+					{ID: 123, Name: "deleted-label"},
+				},
+			},
+			yamlOn:    "on:\n  issues:\n    types: [labeled, unlabeled]",
+			expected:  true,
+			eventType: "multiple",
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.desc, func(t *testing.T) {
+			evts, err := GetEventsFromContent([]byte(tc.yamlOn))
+			assert.NoError(t, err)
+			assert.Len(t, evts, 1)
+
+			// Test if the event matches as expected
+			assert.Equal(t, tc.expected, matchIssuesEvent(tc.payload, evts[0]))
+
+			// For extra validation, check that action mapping works correctly
+			if tc.eventType == "multiple" {
+				// Skip direct action mapping validation for multiple events case
+				// as one action can map to multiple event types
+				return
+			}
+
+			// Determine expected action for single event case
+			var expectedAction string
+			switch tc.payload.Action {
+			case api.HookIssueLabelUpdated:
+				if tc.eventType == "labeled" {
+					expectedAction = "labeled"
+				} else if tc.eventType == "unlabeled" {
+					expectedAction = "unlabeled"
+				}
+			case api.HookIssueLabelCleared:
+				expectedAction = "unlabeled"
+			default:
+				expectedAction = string(tc.payload.Action)
+			}
+
+			assert.Equal(t, expectedAction, tc.eventType, "Event type should match expected")
+		})
+	}
+}

modules/structs/hook.go

@@ -310,13 +310,14 @@ const (
 
 // IssuePayload represents the payload information that is sent along with an issue event.
 type IssuePayload struct {
-	Action     HookIssueAction `json:"action"`
-	Index      int64           `json:"number"`
-	Changes    *ChangesPayload `json:"changes,omitempty"`
-	Issue      *Issue          `json:"issue"`
-	Repository *Repository     `json:"repository"`
-	Sender     *User           `json:"sender"`
-	CommitID   string          `json:"commit_id"`
+	Action        HookIssueAction `json:"action"`
+	Index         int64           `json:"number"`
+	Changes       *ChangesPayload `json:"changes,omitempty"`
+	RemovedLabels []*Label        `json:"removed_labels"`
+	Issue         *Issue          `json:"issue"`
+	Repository    *Repository     `json:"repository"`
+	Sender        *User           `json:"sender"`
+	CommitID      string          `json:"commit_id"`
 }
 
 // JSONPayload encodes the IssuePayload to JSON, with an indentation of two spaces.