계층 표시 테스트 코드 추가

adminfront/src/lib/tenantTree.ts

@@ -0,0 +1,69 @@
+import type { TenantSummary } from "./adminApi";
+
+export type TenantNode = TenantSummary & {
+  children: TenantNode[];
+  recursiveMemberCount: number;
+};
+
+/**
+ * Builds a hierarchical tree from a flat list of tenants and calculates
+ * direct and recursive member counts for each node.
+ */
+export function buildTenantFullTree(
+  allTenants: TenantSummary[],
+  rootId?: string,
+): { currentBase: TenantNode | null; subTree: TenantNode[] } {
+  if (allTenants.length === 0) return { currentBase: null, subTree: [] };
+
+  const tenantMap = new Map<string, TenantNode>();
+  for (const t of allTenants) {
+    tenantMap.set(t.id, {
+      ...t,
+      children: [],
+      recursiveMemberCount: t.memberCount || 0,
+    });
+  }
+
+  // Build initial children relations
+  for (const t of allTenants) {
+    if (t.parentId) {
+      const parent = tenantMap.get(t.parentId);
+      const child = tenantMap.get(t.id);
+      if (parent && child) {
+        parent.children.push(child);
+      }
+    }
+  }
+
+  // Function to calculate recursive counts
+  const calculateRecursive = (node: TenantNode): number => {
+    let total = node.memberCount || 0;
+    for (const child of node.children) {
+      total += calculateRecursive(child);
+    }
+    node.recursiveMemberCount = total;
+    return total;
+  };
+
+  // Calculate for all top-level nodes (those without parent)
+  for (const node of tenantMap.values()) {
+    if (!node.parentId) {
+      calculateRecursive(node);
+    }
+  }
+
+  // If a specific rootId is provided, find and return its subtree
+  if (rootId) {
+    const base = tenantMap.get(rootId);
+    if (base) {
+      // Re-calculate specifically for our current tenant to be sure if it wasn't a global root
+      calculateRecursive(base);
+      return { currentBase: base, subTree: base.children };
+    }
+    return { currentBase: null, subTree: [] };
+  }
+
+  // If no rootId, return all top-level roots as subTree
+  const roots = Array.from(tenantMap.values()).filter((n) => !n.parentId);
+  return { currentBase: null, subTree: roots };
+}