From 687ffae6859415e5c7fbf5750669b3e07b0ce3c2 Mon Sep 17 00:00:00 2001
From: martin <github@martindata.no>
Date: Thu, 5 Mar 2026 17:47:49 +0100
Subject: [PATCH] Adding TransactionArchive methods

---
 src/main/java/temppackage/TransactionArchive.java | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/src/main/java/temppackage/TransactionArchive.java b/src/main/java/temppackage/TransactionArchive.java
index 9888c8c..8b257b2 100644
--- a/src/main/java/temppackage/TransactionArchive.java
+++ b/src/main/java/temppackage/TransactionArchive.java
@@ -29,17 +29,20 @@ public List<Transaction> getTransactions(int week) {
   }
 
   public List<Purchase> getPurchases(int week) {
-    // TODO
-    return null;
+    return transactions.stream()
+        .filter(t -> t.getWeek() == week && t instanceof Purchase)
+        .map(t -> (Purchase) t)
+        .collect(Collectors.toList());
   }
 
   public List<Sale> getSales(int week) {
-    // TODO
-    return null;
+    return transactions.stream()
+        .filter(t -> t.getWeek() == week && t instanceof Sale)
+        .map(t -> (Sale) t)
+        .collect(Collectors.toList());
   }
 
   public int countDistinctWeeks() {
-    // TODO
-    return 0;
+    return (int) transactions.stream().map(Transaction::getWeek).distinct().count();
   }
 }