deleting groups

src/lib/components/member-sidebar.svelte

@@ -105,6 +105,20 @@
 
                       <Button type="submit" class="w-full">Save Changes</Button>
                     </form>
+
+                    {#if (currentEntity as OverviewGroup).members === 1}
+                      <form
+                        method="POST"
+                        action="?/deleteGroup"
+                        class="border-t border-red-500/30 pt-4"
+                      >
+                        <input type="hidden" name="groupId" value={currentEntityId} />
+
+                        <Button type="submit" variant="destructive" class="w-full">
+                          Delete group
+                        </Button>
+                      </form>
+                    {/if}
                   </Tabs.Content>
                 {/if}
                 <Tabs.Content value="users">

src/routes/app/+page.server.ts

@@ -452,6 +452,42 @@ export const actions = {
 
     return { success: true };
   },
+  deleteGroup: async ({ request, locals }) => {
+    const data = await request.formData();
+    const groupId = data.get('groupId');
+
+    if (typeof groupId !== 'string') {
+      return fail(400, { error: 'Invalid group ID' });
+    }
+
+    const group = await db.select().from(table.group).where(eq(table.group.id, groupId)).limit(1);
+
+    if (!group.length) {
+      return fail(404, { error: 'Group not found' });
+    }
+
+    const g = group[0];
+
+    if (g.owner !== locals.user!.id) {
+      return fail(403, { error: 'Not allowed' });
+    }
+
+    if ((g.members as string[]).length !== 1 || (g.members as string[])[0] !== locals.user!.id) {
+      return fail(400, { error: 'Group still has members' });
+    }
+
+    await db.transaction(async (tx) => {
+      await tx
+        .update(table.user)
+        .set({
+          groups: locals.user!.groups.map((z) => z.id).filter((id) => id !== groupId)
+        })
+        .where(eq(table.user.id, locals.user!.id));
+
+      await tx.delete(table.group).where(eq(table.group.id, groupId));
+    });
+    _sendToUser(locals.user!.id, { type: 'group', status: 'removed-from-group' });
+  },
 
   createServer: async ({ request, locals }) => {
     const data = await request.formData();