ENCOA-310

src/pages/api/groups/controller.ts

@@ -19,6 +19,9 @@ async function handler(req: NextApiRequest, res: NextApiResponse) {
   }
   else if (req.method === 'POST') {
     switch (op) {
+      case 'existantGroupIds':
+        res.status(200).json(await existantGroupIds(req.body.names));
+        break;
       case 'crossRefOwnership':
         res.status(200).json(await crossRefOwnership(req.body));
         break;
@@ -41,7 +44,7 @@ async function crossRefOwnership(body: any): Promise<string[]> {
   const { userId, classrooms, entity } = body;
 
   const existingClassrooms = await db.collection('groups')
-    .find({ 
+    .find({
       name: { $in: classrooms },
       admin: { $ne: userId }
     })
@@ -61,7 +64,7 @@ async function crossRefOwnership(body: any): Promise<string[]> {
 
   const adminEntitiesMap = new Map(
     adminUsers.map(admin => [
-      admin.id, 
+      admin.id,
       admin.entities?.map((e: any) => e.id) || []
     ])
   );
@@ -104,7 +107,6 @@ async function getIds(body: any): Promise<Record<string, string>> {
 
 async function deletePriorEntitiesGroups(body: any) {
   const { ids, entity } = body;
-
   if (!Array.isArray(ids) || ids.length === 0 || !entity) {
     return;
   }
@@ -123,8 +125,33 @@ async function deletePriorEntitiesGroups(body: any) {
     return;
   }
 
-  db.collection('groups').updateMany(
+  const affectedGroups = await db.collection('groups')
+    .find({ participants: { $in: toDeleteUserIds } })
+    .project({ id: 1, _id: 0 })
+    .toArray();
+
+  await db.collection('groups').updateMany(
     { participants: { $in: toDeleteUserIds } },
     { $pull: { participants: { $in: toDeleteUserIds } } } as any
   );
+
+  // delete groups that were updated and have no participants
+  await db.collection('groups').deleteMany({
+      id: { $in: affectedGroups.map(g => g.id) },
+      participants: { $size: 0 }
+  });
+}
+
+async function existantGroupIds(names: string[]) {
+  const existingGroups = await db.collection('groups')
+    .find({
+      name: { $in: names }
+    })
+    .project({ id: 1, name: 1, _id: 0 })
+    .toArray();
+
+  return existingGroups.reduce((acc, group) => {
+    acc[group.name] = group.id;
+    return acc;
+  }, {} as Record<string, string>);
 }