feat(graph): Implement Graph View with Dagre Layout and Epic Scope (bb-18e)

src/lib/aggregate-read.ts

@@ -0,0 +1,69 @@
+import type { BeadDependency, BeadIssueWithProject } from './types';
+import type { ProjectScopeOption } from './project-scope';
+import { readIssuesFromDisk } from './read-issues';
+
+function scopeIssueId(projectKey: string, issueId: string): string {
+  return `${projectKey}::${issueId}`;
+}
+
+function remapDependencies(
+  dependencies: BeadDependency[],
+  scopedIssueByOriginalId: Map<string, string>,
+): BeadDependency[] {
+  return dependencies.map((dependency) => ({
+    ...dependency,
+    target: scopedIssueByOriginalId.get(dependency.target) ?? dependency.target,
+  }));
+}
+
+function scopeIssuesForProject(
+  project: ProjectScopeOption,
+  issues: BeadIssueWithProject[],
+): BeadIssueWithProject[] {
+  const scopedIssueByOriginalId = new Map<string, string>();
+  for (const issue of issues) {
+    scopedIssueByOriginalId.set(issue.id, scopeIssueId(project.key, issue.id));
+  }
+
+  return issues.map((issue) => {
+    const scopedId = scopedIssueByOriginalId.get(issue.id) ?? scopeIssueId(project.key, issue.id);
+    return {
+      ...issue,
+      id: scopedId,
+      dependencies: remapDependencies(issue.dependencies, scopedIssueByOriginalId),
+      metadata: {
+        ...issue.metadata,
+        original_id: issue.id,
+        project_key: project.key,
+      },
+      project: {
+        ...issue.project,
+        key: project.key,
+      },
+    };
+  });
+}
+
+export async function readIssuesForScope(options: {
+  mode: 'single' | 'aggregate';
+  selected: ProjectScopeOption;
+  scopeOptions: ProjectScopeOption[];
+}): Promise<BeadIssueWithProject[]> {
+  if (options.mode === 'single') {
+    return readIssuesFromDisk({
+      projectRoot: options.selected.root,
+      projectSource: options.selected.source,
+    });
+  }
+
+  const result = await Promise.all(
+    options.scopeOptions.map(async (project) => {
+      const issues = await readIssuesFromDisk({
+        projectRoot: project.root,
+        projectSource: project.source,
+      });
+      return scopeIssuesForProject(project, issues);
+    }),
+  );
+  return result.flat();
+}