implemented importer für Bandhaus Leipzug

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

de.srsoftware.cal.base/src/main/java/de/srsoftware/cal/BaseImporter.java

@@ -1,9 +1,9 @@
 /* © SRSoftware 2024 */
 package de.srsoftware.cal;
 
-import static de.srsoftware.cal.Util.combine;
-import static de.srsoftware.cal.Util.url;
+import static de.srsoftware.cal.Util.*;
 import static de.srsoftware.tools.Error.error;
+import static de.srsoftware.tools.Optionals.nullIfEmpty;
 import static de.srsoftware.tools.Result.transform;
 import static de.srsoftware.tools.Tag.HREF;
 import static de.srsoftware.tools.TagFilter.*;
@@ -13,6 +13,8 @@ import de.srsoftware.tools.*;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.*;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.time.LocalDate;
@@ -40,18 +42,18 @@ public abstract class BaseImporter implements Importer {
 
 	protected List<Attachment> extractAttachments(Tag eventTag) {
 		return extractAttachmentsTag(eventTag)  //
-		    .optional()
-		    .stream()
-		    .flatMap(tag -> tag.find(IS_IMAGE).stream())
-		    .map(tag -> tag.get("src"))
-		    .filter(Objects::nonNull)
-			.map(url -> url.contains("://") ? url : baseUrl()+url)
-		    .map(Payload::of)
-		    .map(Util::url)
-		    .map(Util::toAttachment)
-		    .map(Result::optional)
-		    .flatMap(Optional::stream)
-		    .toList();
+				.optional()
+				.stream()
+				.flatMap(tag -> tag.find(IS_IMAGE).stream())
+				.map(tag -> tag.get("src"))
+				.filter(Objects::nonNull)
+				.map(url -> url.contains("://") ? url : baseUrl()+url)
+				.map(Payload::of)
+				.map(Util::url)
+				.map(Util::toAttachment)
+				.map(Result::optional)
+				.flatMap(Optional::stream)
+				.toList();
 	}
 
 	protected abstract Predicate<Tag> extractAttachmentsFilter();

de.srsoftware.cal.base/src/main/java/de/srsoftware/cal/Util.java

@@ -11,8 +11,12 @@ import de.srsoftware.cal.api.Coords;
 import de.srsoftware.tools.Payload;
 import de.srsoftware.tools.Result;
 import de.srsoftware.tools.Tag;
+
+import java.io.IOException;
 import java.net.URI;
 import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.LocalTime;
@@ -75,6 +79,14 @@ public class Util {
 		return String.join("\r\n",lines);
 	}
 
+	public static void dump(Tag tag){
+		try {
+			Files.writeString(Path.of("/tmp/dump.txt"),tag.toString(4));
+		} catch (IOException e) {
+			throw new RuntimeException(e);
+		}
+	}
+
 	public static Result<Coords> extractCoords(String coords) {
 		if (coords == null) return error("Argument is null");
 		if (coords.isBlank()) return error("Argument is blank");
@@ -197,6 +209,14 @@ public class Util {
 		}
 	}
 
+	public static Result<Integer> parseInt(String s){
+		try {
+			return Payload.of(Integer.parseInt(s));
+		} catch (NumberFormatException e){
+			return error(e,"Failed to parse %s as integer!",s);
+		}
+	}
+
 	public static Result<URL> url(Result<String> urlResult) {
 		if (urlResult.optional().isEmpty()) return transform(urlResult);
 		var url = urlResult.optional().get();