Decoration issue fails due invalid project id when branch is in fork

src/main/java/com/github/mc1arke/sonarqube/plugin/almclient/gitlab/model/MergeRequest.java

@@ -24,15 +24,18 @@ public class MergeRequest {
     private final long iid;
     private final DiffRefs diffRefs;
     private final long sourceProjectId;
+    private final long targetProjectId;
     private final String webUrl;
 
     public MergeRequest(@JsonProperty("iid") long iid, @JsonProperty("diff_refs") DiffRefs diffRefs,
                         @JsonProperty("source_project_id") long sourceProjectId,
+                        @JsonProperty("target_project_id") long targetProjectId,
                         @JsonProperty("web_url") String webUrl) {
         this.iid = iid;
         this.diffRefs = diffRefs;
         this.sourceProjectId = sourceProjectId;
         this.webUrl = webUrl;
+        this.targetProjectId = targetProjectId;
     }
 
     public long getIid() {
@@ -47,6 +50,10 @@ public long getSourceProjectId() {
         return sourceProjectId;
     }
 
+    public long getTargetProjectId() {
+        return targetProjectId;
+    }
+
     public String getWebUrl() {
         return webUrl;
     }

src/main/java/com/github/mc1arke/sonarqube/plugin/ce/pullrequest/gitlab/GitlabMergeRequestDecorator.java

@@ -107,7 +107,7 @@ protected User getCurrentUser(GitlabClient gitlabClient) {
     @Override
     protected List<String> getCommitIdsForPullRequest(GitlabClient gitlabClient, MergeRequest mergeRequest) {
         try {
-            return gitlabClient.getMergeRequestCommits(mergeRequest.getSourceProjectId(), mergeRequest.getIid()).stream()
+            return gitlabClient.getMergeRequestCommits(mergeRequest.getTargetProjectId(), mergeRequest.getIid()).stream()
                     .map(Commit::getId)
                     .collect(Collectors.toList());
         } catch (IOException ex) {
@@ -130,7 +130,7 @@ protected void submitPipelineStatus(GitlabClient gitlabClient, MergeRequest merg
                     analysisSummary.getNewCoverage(),
                     pipelineId);
 
-            gitlabClient.setMergeRequestPipelineStatus(mergeRequest.getSourceProjectId(), analysis.getCommitSha(), pipelineStatus);
+            gitlabClient.setMergeRequestPipelineStatus(mergeRequest.getTargetProjectId(), analysis.getCommitSha(), pipelineStatus);
         } catch (IOException ex) {
             throw new IllegalStateException("Could not update pipeline status in Gitlab", ex);
         }
@@ -141,7 +141,7 @@ protected void submitCommitNoteForIssue(GitlabClient client, MergeRequest mergeR
         Integer line = Optional.ofNullable(issue.getIssue().getLine()).orElseThrow(() -> new IllegalStateException("No line is associated with this issue"));
 
         try {
-            client.addMergeRequestDiscussion(mergeRequest.getSourceProjectId(), mergeRequest.getIid(),
+            client.addMergeRequestDiscussion(mergeRequest.getTargetProjectId(), mergeRequest.getIid(),
                     new CommitNote(analysisIssueSummary.format(formatterFactory),
                     mergeRequest.getDiffRefs().getBaseSha(),
                     mergeRequest.getDiffRefs().getStartSha(),
@@ -157,11 +157,11 @@ protected void submitCommitNoteForIssue(GitlabClient client, MergeRequest mergeR
     @Override
     protected void submitSummaryNote(GitlabClient client, MergeRequest mergeRequest, AnalysisDetails analysis, AnalysisSummary analysisSummary) {
         try {
-            Discussion summaryComment = client.addMergeRequestDiscussion(mergeRequest.getSourceProjectId(),
+            Discussion summaryComment = client.addMergeRequestDiscussion(mergeRequest.getTargetProjectId(),
                     mergeRequest.getIid(),
                     new MergeRequestNote(analysisSummary.format(formatterFactory)));
             if (analysis.getQualityGateStatus() == QualityGate.Status.OK) {
-                client.resolveMergeRequestDiscussion(mergeRequest.getSourceProjectId(), mergeRequest.getIid(), summaryComment.getId());
+                client.resolveMergeRequestDiscussion(mergeRequest.getTargetProjectId(), mergeRequest.getIid(), summaryComment.getId());
             }
         } catch (IOException ex) {
             throw new IllegalStateException("Could not submit summary comment to Gitlab", ex);
@@ -172,7 +172,7 @@ protected void submitSummaryNote(GitlabClient client, MergeRequest mergeRequest,
     @Override
     protected List<Discussion> getDiscussions(GitlabClient client, MergeRequest pullRequest) {
         try {
-            return client.getMergeRequestDiscussions(pullRequest.getSourceProjectId(), pullRequest.getIid());
+            return client.getMergeRequestDiscussions(pullRequest.getTargetProjectId(), pullRequest.getIid());
         } catch (IOException ex) {
             throw new IllegalStateException("Could not retrieve Merge Request discussions", ex);
         }
@@ -209,7 +209,7 @@ protected boolean isUserNote(Note note) {
     @Override
     protected void addNoteToDiscussion(GitlabClient client, Discussion discussion, MergeRequest pullRequest, String note) {
         try {
-            client.addMergeRequestDiscussionNote(pullRequest.getSourceProjectId(), pullRequest.getIid(), discussion.getId(), note);
+            client.addMergeRequestDiscussionNote(pullRequest.getTargetProjectId(), pullRequest.getIid(), discussion.getId(), note);
         } catch (IOException ex) {
             throw new IllegalStateException("Could not add note to Merge Request discussion", ex);
         }
@@ -218,7 +218,7 @@ protected void addNoteToDiscussion(GitlabClient client, Discussion discussion, M
     @Override
     protected void resolveDiscussion(GitlabClient client, Discussion discussion, MergeRequest pullRequest) {
         try {
-            client.resolveMergeRequestDiscussion(pullRequest.getSourceProjectId(), pullRequest.getIid(), discussion.getId());
+            client.resolveMergeRequestDiscussion(pullRequest.getTargetProjectId(), pullRequest.getIid(), discussion.getId());
         } catch (IOException ex) {
             throw new IllegalStateException("Could not resolve Merge Request discussion", ex);
         }

src/test/java/com/github/mc1arke/sonarqube/plugin/ce/pullrequest/gitlab/GitlabMergeRequestDecoratorIntegrationTest.java

@@ -149,6 +149,7 @@ private void decorateQualityGateStatus(QualityGate.Status status) {
         wireMockRule.stubFor(get(urlPathEqualTo("/api/v4/projects/" + urlEncode(repositorySlug) + "/merge_requests/" + mergeRequestIid)).willReturn(okJson("{\n" +
                 "  \"id\": 15235,\n" +
                 "  \"iid\": " + mergeRequestIid + ",\n" +
+                "  \"target_project_id\": " + sourceProjectId + ",\n" +
                 "  \"web_url\": \"http://gitlab.example.com/my-group/my-project/merge_requests/1\",\n" +
                 "  \"diff_refs\": {\n" +
                 "    \"base_sha\":\"d6a420d043dfe85e7c240fd136fc6e197998b10a\",\n" +

src/test/java/com/github/mc1arke/sonarqube/plugin/ce/pullrequest/gitlab/GitlabMergeRequestDecoratorTest.java

@@ -114,6 +114,7 @@ public void setUp() throws IOException {
         when(analysisDetails.getPullRequestId()).thenReturn(Long.toString(MERGE_REQUEST_IID));
         when(mergeRequest.getIid()).thenReturn(MERGE_REQUEST_IID);
         when(mergeRequest.getSourceProjectId()).thenReturn(PROJECT_ID);
+        when(mergeRequest.getTargetProjectId()).thenReturn(PROJECT_ID);
         when(mergeRequest.getDiffRefs()).thenReturn(diffRefs);
         when(mergeRequest.getWebUrl()).thenReturn(MERGE_REQUEST_WEB_URL);
         when(diffRefs.getBaseSha()).thenReturn(BASE_SHA);