Support GitLab work_items URL structure in unfurl integration (outline#11795)

* Initial plan

* Support GitLab work_items URL structure in parseUrl

Co-authored-by: tommoor <380914+tommoor@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: tommoor <380914+tommoor@users.noreply.github.com>

Author: Copilot

plugins/gitlab/shared/GitLabUtils.test.ts

@@ -42,6 +42,32 @@ describe("GitLabUtils.parseUrl", () => {
       });
     });
 
+    it("should parse a work_items URL", () => {
+      const result = GitLabUtils.parseUrl(
+        "https://gitlab.com/speak/purser/-/work_items/39"
+      );
+      expect(result).toEqual({
+        owner: "speak",
+        repo: "purser",
+        type: UnfurlResourceType.Issue,
+        id: 39,
+        url: "https://gitlab.com/speak/purser/-/work_items/39",
+      });
+    });
+
+    it("should parse a nested group work_items URL", () => {
+      const result = GitLabUtils.parseUrl(
+        "https://gitlab.com/group/subgroup/repo/-/work_items/5"
+      );
+      expect(result).toEqual({
+        owner: "group/subgroup",
+        repo: "repo",
+        type: UnfurlResourceType.Issue,
+        id: 5,
+        url: "https://gitlab.com/group/subgroup/repo/-/work_items/5",
+      });
+    });
+
     it("should return undefined for unsupported resource type", () => {
       const result = GitLabUtils.parseUrl(
         "https://gitlab.com/speak/purser/-/pipelines/100"
@@ -182,6 +208,22 @@ describe("GitLabUtils.parseUrl", () => {
       });
     });
 
+    it("should parse a work_items URL with show parameter", () => {
+      const show = btoa(
+        JSON.stringify({ iid: "39", full_path: "speak/purser", id: 1215135 })
+      );
+      const result = GitLabUtils.parseUrl(
+        `https://gitlab.com/speak/purser/-/work_items?show=${show}`
+      );
+      expect(result).toEqual({
+        owner: "speak",
+        repo: "purser",
+        type: UnfurlResourceType.Issue,
+        id: 39,
+        url: `https://gitlab.com/speak/purser/-/work_items?show=${show}`,
+      });
+    });
+
     it("should return undefined for invalid base64 in show parameter", () => {
       const result = GitLabUtils.parseUrl(
         "https://gitlab.com/speak/purser/-/issues?show=not-valid-base64!!!"

plugins/gitlab/shared/GitLabUtils.ts

@@ -142,7 +142,7 @@ export class GitLabUtils {
         const owner = parts.join("/");
 
         const type =
-          resourceType === "issues"
+          resourceType === "issues" || resourceType === "work_items"
             ? UnfurlResourceType.Issue
             : resourceType === "merge_requests"
               ? UnfurlResourceType.PR
@@ -192,7 +192,7 @@ export class GitLabUtils {
       const owner = parts.join("/");
 
       const type =
-        resourceType === "issues"
+        resourceType === "issues" || resourceType === "work_items"
           ? UnfurlResourceType.Issue
           : resourceType === "merge_requests"
             ? UnfurlResourceType.PR