feat: add affiliation request save

src/main/java/fr/titionfire/ffsaf/utils/Utils.java

@@ -1,7 +1,14 @@
 package fr.titionfire.ffsaf.utils;
 
+import jodd.net.MimeTypes;
+
+import java.io.*;
+import java.net.URLConnection;
+import java.nio.file.Files;
 import java.util.Calendar;
 import java.util.Date;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.Future;
 
 public class Utils {
 
@@ -19,4 +26,35 @@ public class Utils {
             return calendar.get(Calendar.YEAR) - 1;
         }
     }
+
+    public static Future<String> replacePhoto(long id, byte[] input, String media, String dir) {
+        return CompletableFuture.supplyAsync(() -> {
+            try (InputStream is = new BufferedInputStream(new ByteArrayInputStream(input))) {
+                String mimeType = URLConnection.guessContentTypeFromStream(is);
+                String[] detectedExtensions = MimeTypes.findExtensionsByMimeTypes(mimeType, false);
+                if (detectedExtensions.length == 0)
+                    throw new IOException("Fail to detect file extension for MIME type " + mimeType);
+
+                File dirFile = new File(media, dir);
+                if (!dirFile.exists())
+                    if (dirFile.mkdirs())
+                        throw new IOException("Fail to create directory " + dir);
+
+                FilenameFilter filter = (directory, filename) -> filename.startsWith(String.valueOf(id));
+                File[] files = dirFile.listFiles(filter);
+                if (files != null) {
+                    for (File file : files) {
+                        //noinspection ResultOfMethodCallIgnored
+                        file.delete();
+                    }
+                }
+
+                String extension = "." + detectedExtensions[0];
+                Files.write(new File(dirFile, id + extension).toPath(), input);
+                return "OK";
+            } catch (IOException e) {
+                return e.getMessage();
+            }
+        });
+    }
 }