feat: added methods to get organization logos from API

src/main/java/edu/group5/app/model/organization/OrganizationService.java

@@ -1,15 +1,28 @@
 package edu.group5.app.model.organization;
 
+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Document;
+import org.jsoup.nodes.Element;
+
+import java.util.HashMap;
 import java.util.Map;
+import java.util.concurrent.CompletableFuture;
 
 /**
  * Service class for managing organization-related operations.
  * It interacts with the OrganizationRepository to retrieve organization information
  * and contains business logic associated with organization management.
+ *
+ * <P>It provides fetching logo URLs by web scraping each organization's page on
+ * Innsamlingskontrollen.</P>
+ *
+ * Fetched logo URLs are cached to avoid redundant network requests.
  */
 public class OrganizationService {
   private OrganizationRepository organizationRepository;
 
+  private final Map<String, String> logoCache = new HashMap<>();
+
   /**
    * Constructs an OrganizationService with the given OrganizationRepository.
    * @param organizationRepository the OrganizationRepository to use for managing organization data; must not be null
@@ -55,4 +68,82 @@ public Organization findByOrgNumber(int orgNumber) {
   public Organization findByOrgName(String name) {
     return organizationRepository.findByOrgName(name);
   }
+
+  /**
+   * Fetches the logo URL for the given page by scraping the {@code div.logo img}
+   * element. Results are cached so each URL is only fetched once.
+   *
+   * <P>
+   *   Using Jsoup to web scrape through the URLs in the API.
+   * </P>
+   * @param pageUrl the URL for the organization's page; may be null or blank
+   * @return the absolute logo URL, or null if not found or pageUrl is invalid
+   */
+
+  public String fetchLogoUrl(String pageUrl) {
+    if (pageUrl == null || pageUrl.isBlank()) {
+      return null;
+    }
+
+    if (logoCache.containsKey(pageUrl)) {
+      return logoCache.get(pageUrl);
+    }
+
+    try {
+      Document doc = Jsoup.connect(pageUrl).get();
+      Element img = doc.selectFirst("div.logo img");
+
+      if (img != null) {
+        String logoUrl = img.absUrl("src");
+        logoCache.put(pageUrl, logoUrl);
+        return logoUrl;
+      }
+    } catch (Exception e) {
+      System.out.println("Could not get logo for: " + pageUrl);
+    }
+    return null;
+  }
+
+  /**
+   * Fetches all trusted organizations with their logo URLs.
+   *
+   * <p>
+   *   For each trusted organization, attempts to get its logo using
+   *   {@link #fetchLogoUrl(String)}. Creates a new Organization
+   *   object including the logo URL.
+   * </p>
+   * @return a map of trusted organizations keyed by organization number, with logos included
+   */
+  public Map<Integer, Organization> getTrustedOrganizationsWithLogos() {
+    Map<Integer, Organization> original = getTrustedOrganizations();
+    Map<Integer, Organization> trustedOrgsWithLogos = new HashMap<>();
+
+    for (Organization org : original.values()) {
+      String logoUrl = fetchLogoUrl(org.websiteUrl());
+
+      Organization newOrg = new Organization(
+          org.orgNumber(),
+          org.name(),
+          org.trusted(),
+          org.websiteUrl(),
+          org.isPreApproved(),
+          org.description(),
+          logoUrl
+      );
+      trustedOrgsWithLogos.put(newOrg.orgNumber(), newOrg);
+    }
+    return trustedOrgsWithLogos;
+  }
+
+  /**
+   * Asynchronously fetches trusted organizations with logos.
+   *
+   * <p>Runs in the background so the UI thread is no blocked.
+   * Returns a CompletableFuture that completes when all logos are loaded.</p>
+   *
+   * @return a CompletableFuture containing a map of organizations with logos
+   */
+  public CompletableFuture<Map<Integer, Organization>> getTrustedOrganizationsWithLogosAsync() {
+    return CompletableFuture.supplyAsync(this::getTrustedOrganizationsWithLogos);
+  }
 }