Updated FrontpageController

Changed the logic for getFilteredCharities to need to include ALL categories/filters to show a category.

helpmehelpapplication/src/main/java/ntnu/systemutvikling/team6/controller/FrontpageController.java

@@ -3,6 +3,7 @@
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 import java.util.Random;
 import javafx.event.ActionEvent;
 import javafx.fxml.FXML;
@@ -162,7 +163,10 @@ public void handleFrontSearch(ActionEvent event) {
    * This method is used to filter the charities based on the selected filters.
    *
    * <p>The filters are whether the charity was pre-verified, or if it falls under one (or more) of
-   * the given categories.
+   * the given categories.</p>
+   *
+   * <p>The check checks whether the given charity has ALL filters. If one does not apply,
+   * the charity is rejected.</p>
    *
    * @return a list of filtered charities.
    */
@@ -178,21 +182,18 @@ private List<Charity> getFilteredCharities() {
 
       if (!selectedCategories.isEmpty()) {
 
-        boolean hasMatch = false;
-
-        for (String cat : charity.getCategory()) {
-          if (cat == null) continue;
+        boolean hasAll =
+            charity.getCategory().stream()
+                .filter(Objects::nonNull)
+                .map(c -> c.toLowerCase().trim())
+                .collect(java.util.stream.Collectors.toSet())
+                .containsAll(selectedCategories);
 
-          if (selectedCategories.contains(cat.toLowerCase().trim())) {
-            hasMatch = true;
-            break;
-          }
-        }
-
-        if (!hasMatch) {
+        if (!hasAll) {
           continue;
         }
       }
+
       filtered.add(charity);
     }