finished importer for Rosenkeller

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

de.srsoftware.cal.api/src/main/java/de/srsoftware/cal/api/Attachment.java

@@ -4,18 +4,9 @@ package de.srsoftware.cal.api;
 import java.net.URL;
 
 /**
- * attachments may provide additional information about an appointment
+ * an attachment for appointments
+ * @param url the URL of the attached document
+ * @param mime the mime type of the attached document
  */
-public interface Attachment {
-	/**
-	 * the mime type of the attached document
-	 * @return a mime type
-	 */
-	String mime();
-
-	/**
-	 * the URL of the attached document
-	 * @return the attachment URL
-	 */
-	URL url();
+public record Attachment(URL url, String mime) {
 }

de.srsoftware.cal.api/src/main/java/de/srsoftware/cal/api/Importer.java

@@ -1,7 +1,6 @@
 /* © SRSoftware 2024 */
 package de.srsoftware.cal.api;
 
-import de.srsoftware.tools.Result;
 import java.io.IOException;
 import java.util.stream.Stream;
 
@@ -17,7 +16,9 @@ public interface Importer {
 
 	/**
 	 * get the list of appointments from the source associated with this importer
+	 *
 	 * @return a list of appointments
+	 * @throws IOException if there is an IOException
 	 */
-	Stream<Result<Appointment>> fetch() throws IOException;
+	Stream<Appointment> fetch() throws IOException;
 }

de.srsoftware.cal.api/src/main/java/de/srsoftware/cal/api/Link.java

@@ -5,17 +5,8 @@ import java.net.URL;
 
 /**
  * Links are additional content that may be added to appointments
+ * @param url the URL of the link
+ * @param desciption some information about the target of the link
  */
-public interface Link {
-	/**
-	 * some information about the target of the link
-	 * @return descriptive text
-	 */
-	String description();
-
-	/**
-	 * the URL of the link
-	 * @return the link`s URL
-	 */
-	URL url();
+public record Link(URL url, String desciption) {
 }

de.srsoftware.cal.app/src/main/java/de/srsoftware/cal/app/Application.java

@@ -1,23 +1,22 @@
 /* © SRSoftware 2024 */
 package de.srsoftware.cal.app;
 
-import de.srsoftware.cal.api.Appointment;
 import de.srsoftware.cal.importer.JenaRosenkeller;
-import de.srsoftware.tools.Payload;
-import java.io.IOException;
 
+/**
+ * Test application
+ */
 public class Application {
-	public static void main(String[] args) throws IOException {
+	private Application() {
+	}
+
+	/**
+	 * sandbox
+	 * @param args default
+	 */
+	public static void main(String[] args) {
 		var rosenkeller	 = new JenaRosenkeller();
 		var appointments = rosenkeller.fetch();
-		appointments.forEach(res -> {
-			System.out.printf("class: %s%n", res.getClass());
-			if (res instanceof Payload<Appointment> payload) {
-				System.out.printf("payload: %s%n", payload.get().getClass());
-				System.out.println(payload.get());
-			} else {
-				System.err.println(res);
-			}
-		});
+		appointments.forEach(System.err::println);
 	}
 }

de.srsoftware.cal.importer/build.gradle.kts

@@ -3,6 +3,6 @@ description = "OpenCloudCal : Importers"
 dependencies {
     implementation(project(":de.srsoftware.cal.api"))
     implementation("de.srsoftware:tools.optionals:1.0.0")
-    implementation("de.srsoftware:tools.util:1.1.1")
+    implementation("de.srsoftware:tools.util:1.1.2")
     implementation("de.srsoftware:tools.web:1.3.2")
 }

de.srsoftware.cal.importer/src/main/java/de/srsoftware/cal/importer/BaseAppointment.java

@@ -1,17 +1,116 @@
 /* © SRSoftware 2024 */
 package de.srsoftware.cal.importer;
 
-import static java.util.Optional.empty;
+import static de.srsoftware.tools.Optionals.nullable;
 
 import de.srsoftware.cal.api.Appointment;
 import de.srsoftware.cal.api.Attachment;
 import de.srsoftware.cal.api.Coords;
 import de.srsoftware.cal.api.Link;
 import java.time.LocalDateTime;
-import java.util.Optional;
-import java.util.Set;
+import java.util.*;
+
+/**
+ * basic class for Appointments
+ */
+public class BaseAppointment implements Appointment {
+	private final long          id;
+	private final String        title, description;
+	private final LocalDateTime end, start;
+	private Coords	            coords        = null;
+	private final Set<Attachment> attachments = new HashSet<>();
+	private final Set<String> tags	          = new HashSet<>();
+	private final Set<Link> links	          = new HashSet<>();
+	private final String    location;
+
+	/**
+	 * create a new appointment
+	 * @param id set the id
+	 * @param title set the title
+	 * @param description set the description
+	 * @param start set the start date
+	 * @param end set the end date
+	 * @param location set the location
+	 */
+	public BaseAppointment(long id, String title, String description, LocalDateTime start, LocalDateTime end, String location) {
+		this.description = description;
+		this.end	 = end;
+		this.id	 = id;
+		this.location	 = location;
+		this.start	 = start;
+		this.title	 = title;
+	}
+
+	/**
+	 * adds attachments
+	 * @param newAttachments the attachments to add to the appointment
+	 * @return the appointment
+	 */
+	public BaseAppointment add(Attachment... newAttachments) {
+		Collections.addAll(attachments, newAttachments);
+		return this;
+	}
+
+	/**
+	 * adds attachments
+	 * @param newAttachments the attachments to add to the appointment
+	 * @return the appointment
+	 */
+	public BaseAppointment add(Collection<Attachment> newAttachments) {
+		attachments.addAll(newAttachments);
+		return this;
+	}
+
+	/**
+	 * adds links
+	 * @param newLinks the links to add to the appointment
+	 * @return the appointment
+	 */
+	public BaseAppointment addLinks(Link... newLinks) {
+		Collections.addAll(links, newLinks);
+		return this;
+	}
+
+	/**
+	 * adds links
+	 * @param newLinks the links to add to the appointment
+	 * @return the appointment
+	 */
+	public BaseAppointment addLinks(Collection<Link> newLinks) {
+		links.addAll(newLinks);
+		return this;
+	}
+
+	/**
+	 * adds tag
+	 * @param newTags the tag to add to the appointment
+	 * @return the appointment
+	 */
+	public BaseAppointment tag(String... newTags) {
+		Collections.addAll(tags, newTags);
+		return this;
+	}
+
+	/**
+	 * adds tag
+	 * @param newTags the tag to add to the appointment
+	 * @return the appointment
+	 */
+	public BaseAppointment tag(Collection<String> newTags) {
+		tags.addAll(newTags);
+		return this;
+	}
+
+	/**
+	 * set the coordinates of the attachments
+	 * @param newCoords the coordinates to apply
+	 * @return the appointment
+	 */
+	public BaseAppointment coords(Coords newCoords) {
+		coords = newCoords;
+		return this;
+	}
 
-public abstract class BaseAppointment implements Appointment {
 	@Override
 	public Set<Attachment> attachments() {
 		return Set.of();
@@ -19,12 +118,32 @@ public abstract class BaseAppointment implements Appointment {
 
 	@Override
 	public Optional<Coords> coords() {
-		return empty();
+		return nullable(coords);
+	}
+
+	@Override
+	public String description() {
+		return description;
 	}
 
 	@Override
 	public Optional<LocalDateTime> end() {
-		return empty();
+		return nullable(end);
+	}
+
+	@Override
+	public long id() {
+		return id;
+	}
+
+	@Override
+	public String location() {
+		return location;
+	}
+
+	@Override
+	public LocalDateTime start() {
+		return start;
 	}
 
 	@Override
@@ -32,9 +151,14 @@ public abstract class BaseAppointment implements Appointment {
 		return Set.of();
 	}
 
+	@Override
+	public String title() {
+		return title;
+	}
+
 	@Override
 	public String toString() {
-		return "%s (%s)".formatted(title(), BaseAppointment.class.getSimpleName());
+		return "%s (%s)".formatted(title, start);
 	}
 
 	@Override

de.srsoftware.cal.importer/src/main/java/de/srsoftware/cal/importer/JenaRosenkeller.java

@@ -16,12 +16,18 @@ import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
 import java.time.LocalDateTime;
+import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 import java.util.Optional;
 import java.util.regex.Pattern;
 import java.util.stream.Stream;
 
+/**
+ * Importer für Events vom Rosenkeller Jena
+ */
 public class JenaRosenkeller implements Importer {
+	private static final String  BASE_URL	= "https://rosenkeller.org";
 	private static final String  APPOINTMENT_TAG_ID = "tribe-events-content";
 	private static final Coords  DEFAULT_COORDS	= new Coords(50.9294, 11.585);
 	private static final String  DEFAULT_LOCATION	= "Rosenkeller, Johannisstr. 13, 07743 Jena";
@@ -33,8 +39,8 @@ public class JenaRosenkeller implements Importer {
 	}
 
 	@Override
-	public Stream<Result<Appointment>> fetch() throws IOException {
-		var	       url    = Payload.of("https://rosenkeller.org/de/programm");
+	public Stream<Appointment> fetch() {
+		var	       url    = Payload.of(BASE_URL + "/de/programm");
 		Stream<Result<String>> stream = url(url)
 				    .map(JenaRosenkeller::open)	 //
 				    .map(JenaRosenkeller::preload)
@@ -43,11 +49,18 @@ public class JenaRosenkeller implements Importer {
 				    .stream();
 		return stream  //
 		    .map(JenaRosenkeller::url)
+		    .map(JenaRosenkeller::loadEvent)
+		    .flatMap(result -> result.optional().stream());
+	}
+
+	private static Result<Appointment> loadEvent(Result<URL> urlResult) {
+		var link = urlResult.optional().map(url -> new Link(url, "Event-Seite")).orElse(null);
+		return urlResult  //
 		    .map(JenaRosenkeller::open)
 		    .map(JenaRosenkeller::preload)
 		    .map(JenaRosenkeller::parse)
 		    .map(JenaRosenkeller::getEventDiv)
-		    .map(JenaRosenkeller::loadEvent);
+		    .map(tagResult -> parseEvent(tagResult, link));
 	}
 
 	private static Result<Tag> getEventDiv(Result<Tag> pageResult) {
@@ -119,14 +132,20 @@ public class JenaRosenkeller implements Importer {
 		}
 	}
 
-	private static Result<Appointment> loadEvent(Result<Tag> domResult) {
+	private static Result<Appointment> parseEvent(Result<Tag> domResult, Link eventPage) {
 		switch (domResult) {
 			case Payload<Tag> payload:
 				var appointmentTag = payload.get();
 				var title	   = extractTitle(appointmentTag);
+				if (title.isEmpty()) return Error.format("No title found at %s", eventPage.url());
 				var description = extractDescription(appointmentTag);
+				if (description.isEmpty()) return Error.format("No description found at %s", eventPage.url());
 				var start = extractStart(appointmentTag);
-				return Error.of("Could not find appointment title");
+				if (start.isEmpty()) return Error.format("No start date/time found at %s", eventPage.url());
+				var links	= extractLinks(appointmentTag);
+				var attachments = extractAttachments(appointmentTag);
+				var appointment = new BaseAppointment(0, title.get(), description.get(), start.get(), null, DEFAULT_LOCATION).addLinks(links).add(attachments);
+				return Payload.of(appointment);
 			case Error<Tag> err:
 				return err.transform();
 			default:
@@ -134,6 +153,60 @@ public class JenaRosenkeller implements Importer {
 		}
 	}
 
+	private static List<Attachment> extractAttachments(Tag appointmentTag) {
+		return appointmentTag  //
+		    .find(ofType("img"))
+		    .stream()
+		    .map(tag -> tag.get("src"))
+		    .filter(Objects::nonNull)
+		    .map(Payload::of)
+		    .map(JenaRosenkeller::url)
+		    .map(JenaRosenkeller::toAttachment)
+		    .map(Result::optional)
+		    .flatMap(Optional::stream)
+		    .toList();
+	}
+
+	private static Result<Attachment> toAttachment(Result<URL> urlResult) {
+		switch (urlResult) {
+			case Payload<URL> payload:
+				try {
+					var mime = payload.get().openConnection().getContentType();
+					return Payload.of(new Attachment(payload.get(), mime));
+				} catch (Exception e) {
+					return Error.format("Failed to read mime type of %s", payload);
+				}
+			case Error<URL> err:
+				return err.transform();
+			default:
+				return Error.format("Invalid parameter: %s", urlResult.getClass().getSimpleName());
+		}
+	}
+
+	private static List<Link> extractLinks(Tag appointmentTag) {
+		var links = new ArrayList<Link>();
+		appointmentTag	//
+		    .find(attributeStartsWith("id", "post-"))
+		    .stream()
+		    .flatMap(tag -> tag.find(ofType("a")).stream())
+		    .forEach(anchor -> {
+			    var href = anchor.get("href");
+			    if (href == null) return;
+			    if (!href.contains("://")) href = BASE_URL + "href";
+			    var text = anchor.inner(0).orElse(href);
+			    Payload.of(href).map(JenaRosenkeller::url).optional().map(url -> new Link(url, text)).ifPresent(links::add);
+		    });
+		return links;
+	}
+
+	private static Result<Link> toLink(Result<URL> urlResult, Optional<String> description) {
+		return switch (urlResult) {
+			case Payload<URL> payload -> Payload.of(new Link(payload.get(),description.orElse(payload.toString())));
+			case Error<URL> err -> err.transform();
+			default -> Error.format("Invalid parameter: %s", urlResult.getClass().getSimpleName());
+		};
+	}
+
 	private static Optional<LocalDateTime> extractStart(Tag appointmentTag) {
 		return appointmentTag.find(attributeEquals("class", "tribe-event-date-start")).stream().flatMap(tag -> tag.inner(0).stream()).flatMap(txt -> toDateTime(txt).stream()).findAny();
 	}
@@ -185,29 +258,6 @@ public class JenaRosenkeller implements Importer {
 		    .findAny();
 	}
 
-	private static Optional<Appointment> nope(URL url) {
-		try {
-			var input  = url.openConnection().getInputStream();
-			input      = XMLParser.preload(input);
-			var result = XMLParser.parse(input);
-			input.close();
-			if (result instanceof Payload<Tag> payload) {
-				var tag = payload.get();
-				tag.find(attributeEndsWith("class", "single-event-title"))  //
-				    .stream()
-				    .map(Tag::children)
-				    .filter(not(List::isEmpty))
-				    .map(List::getFirst)
-				    .map(Tag::toString)
-				    .forEach(System.out::println);
-			}
-			return empty();
-		} catch (IOException e) {
-			e.printStackTrace();
-			return empty();
-		}
-	}
-
 	private static Result<URL> url(Result<String> urls) {
 		switch (urls) {
 			case Payload<String> payload: