working on event extraction from rosenkeller

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

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

@@ -2,18 +2,9 @@
 package de.srsoftware.cal.api;
 
 /**
- * cartesian coordinates
+ * cartesian coords
+ * @param longitude the longitude
+ * @param latitude the latitude
  */
-public interface Coords {
-	/**
-	 * the longitude
-	 * @return the longitude
-	 */
-	double longitude();
-
-	/**
-	 * the latitude
-	 * @return the latitude
-	 */
-	double latitude();
+public record Coords(double longitude, double latitude) {
 }

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

@@ -4,5 +4,5 @@ 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.web:1.2.2")
+    implementation("de.srsoftware:tools.web:1.3.2")
 }

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

@@ -0,0 +1,44 @@
+/* © SRSoftware 2024 */
+package de.srsoftware.cal.importer;
+
+import static java.util.Optional.empty;
+
+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;
+
+public abstract class BaseAppointment implements Appointment {
+	@Override
+	public Set<Attachment> attachments() {
+		return Set.of();
+	}
+
+	@Override
+	public Optional<Coords> coords() {
+		return empty();
+	}
+
+	@Override
+	public Optional<LocalDateTime> end() {
+		return empty();
+	}
+
+	@Override
+	public Set<String> tags() {
+		return Set.of();
+	}
+
+	@Override
+	public String toString() {
+		return "%s (%s)".formatted(title(), BaseAppointment.class.getSimpleName());
+	}
+
+	@Override
+	public Set<Link> urls() {
+		return Set.of();
+	}
+}

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

@@ -1,15 +1,14 @@
 /* © SRSoftware 2024 */
 package de.srsoftware.cal.importer;
 
+import static de.srsoftware.tools.Optionals.nullable;
+import static de.srsoftware.tools.TagFilter.*;
 import static java.util.Optional.empty;
 import static java.util.function.Predicate.not;
 
 import de.srsoftware.cal.api.*;
+import de.srsoftware.tools.*;
 import de.srsoftware.tools.Error;
-import de.srsoftware.tools.Payload;
-import de.srsoftware.tools.Result;
-import de.srsoftware.tools.Tag;
-import de.srsoftware.tools.XMLParser;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.MalformedURLException;
@@ -19,66 +18,14 @@ import java.net.URL;
 import java.time.LocalDateTime;
 import java.util.List;
 import java.util.Optional;
-import java.util.Set;
+import java.util.regex.Pattern;
 import java.util.stream.Stream;
 
 public class JenaRosenkeller implements Importer {
-	private static class EmptyAppointment implements Appointment {
-		@Override
-		public Set<Attachment> attachments() {
-			return Set.of();
-		}
-
-		@Override
-		public Optional<Coords> coords() {
-			return empty();
-		}
-
-		@Override
-		public String description() {
-			return null;
-		}
-
-		@Override
-		public Optional<LocalDateTime> end() {
-			return empty();
-		}
-
-		@Override
-		public long id() {
-			return 0;
-		}
-
-		@Override
-		public String location() {
-			return null;
-		}
-
-		@Override
-		public LocalDateTime start() {
-			return null;
-		}
-
-		@Override
-		public Set<String> tags() {
-			return Set.of();
-		}
-
-		@Override
-		public String title() {
-			return null;
-		}
-
-		@Override
-		public String toString() {
-			return "%s (%s)".formatted(title(), EmptyAppointment.class.getSimpleName());
-		}
-
-		@Override
-		public Set<Link> urls() {
-			return Set.of();
-		}
-	}
+	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";
+	private static final Pattern DATE_PATTERN	= Pattern.compile("(\\d+) (\\w+)(\\W+(\\d+):(\\d+))?");
 
 	@Override
 	public String description() {
@@ -99,17 +46,31 @@ public class JenaRosenkeller implements Importer {
 		    .map(JenaRosenkeller::open)
 		    .map(JenaRosenkeller::preload)
 		    .map(JenaRosenkeller::parse)
+		    .map(JenaRosenkeller::getEventDiv)
 		    .map(JenaRosenkeller::loadEvent);
 	}
 
+	private static Result<Tag> getEventDiv(Result<Tag> pageResult) {
+		switch (pageResult) {
+			case Payload<Tag> payload:
+				List<Tag> list = payload.get().find(attributeEquals("id", APPOINTMENT_TAG_ID));
+				if (list.size() == 1) return Payload.of(list.getFirst());
+				return Error.format("Could not find tag with id \"%s\"", APPOINTMENT_TAG_ID);
+			case Error<Tag> err:
+				return err.transform();
+			default:
+				return Error.format("Invalid parameter: %s", pageResult.getClass().getSimpleName());
+		}
+	}
+
 	private static Result<List<String>> findEventUrls(Result<Tag> tagResult) {
 		return switch (tagResult) {
 			case Payload<Tag> payload -> {
 				List<String> urls = payload // find tag with event-id
 						.get()
-						.find("id", val -> val.startsWith("event-"))
+						.find(attributeStartsWith("id","event-"))
 						.stream()
-						.map(t -> t.find("class", "ect-event-url"::equals))
+						.map(t -> t.find(attributeEquals("class", "ect-event-url")))
 						.flatMap(List::stream)
 						.map(t -> t.get("href"))
 						.toList();
@@ -161,23 +122,10 @@ public class JenaRosenkeller implements Importer {
 	private static Result<Appointment> loadEvent(Result<Tag> domResult) {
 		switch (domResult) {
 			case Payload<Tag> payload:
-				var	 tag   = payload.get();
-				Optional<String> title = tag.find("class", s -> s.endsWith("single-event-title"))  //
-					             .stream()
-					             .map(Tag::children)
-					             .filter(not(List::isEmpty))
-					             .map(List::getFirst)
-					             .map(Tag::toString)
-					             .findAny();
-				if (title.isPresent()) {
-					var appointment = new EmptyAppointment() {
-						@Override
-						public String title() {
-							return title.get();
-						}
-					};
-					return Payload.of(appointment);
-				}
+				var appointmentTag = payload.get();
+				var title	   = extractTitle(appointmentTag);
+				var description	   = extractDescription(appointmentTag);
+				var start	   = extractStart(appointmentTag);
 				return Error.of("Could not find appointment title");
 			case Error<Tag> err:
 				return err.transform();
@@ -186,6 +134,57 @@ public class JenaRosenkeller implements Importer {
 		}
 	}
 
+	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();
+	}
+
+	private static Optional<LocalDateTime> toDateTime(String text) {
+		var match = DATE_PATTERN.matcher(text);
+		if (match.find()) {
+			var dayOfMonth = Integer.parseInt(match.group(1));
+			var month      = toNumericMonth(match.group(2));
+			if (month.isEmpty()) return empty();
+
+
+			var hour   = Integer.parseInt(nullable(match.group(4)).orElse("0"));
+			var minute = Integer.parseInt(nullable(match.group(5)).orElse("0"));
+			var now    = LocalDateTime.now();
+			var date   = LocalDateTime.of(now.getYear(), month.get(), dayOfMonth, hour, minute);
+			if (date.isBefore(now)) date = date.plusYears(1);
+			return Optional.of(date);
+		}
+		return empty();
+	}
+
+	private static Optional<Integer> toNumericMonth(String month) {
+		month = month.toLowerCase();
+		if (month.startsWith("ja")) return Optional.of(1);
+		if (month.startsWith("f")) return Optional.of(2);
+		if ("may".equals(month) || "mai".equals(month)) return Optional.of(5);
+		if (month.startsWith("m")) return Optional.of(3);
+		if (month.startsWith("ap")) return Optional.of(4);
+		if (month.startsWith("jun")) return Optional.of(6);
+		if (month.startsWith("jul")) return Optional.of(7);
+		if (month.startsWith("au")) return Optional.of(8);
+		if (month.startsWith("s")) return Optional.of(9);
+		if (month.startsWith("o")) return Optional.of(10);
+		if (month.startsWith("n")) return Optional.of(11);
+		if (month.startsWith("d")) return Optional.of(12);
+		return empty();
+	}
+
+	private static Optional<String> extractDescription(Tag appointmentTag) {
+		return appointmentTag.find(attributeHas("class", "tribe-events-single-event-description")).stream().flatMap(tag -> tag.inner(2).stream()).findAny();
+	}
+
+	private static Optional<String> extractTitle(Tag appointmentTag) {
+		return appointmentTag
+		    .find(attributeEndsWith("class", "single-event-title"))  //
+		    .stream()
+		    .flatMap(tag -> tag.inner(2).stream())
+		    .findAny();
+	}
+
 	private static Optional<Appointment> nope(URL url) {
 		try {
 			var input  = url.openConnection().getInputStream();
@@ -194,7 +193,7 @@ public class JenaRosenkeller implements Importer {
 			input.close();
 			if (result instanceof Payload<Tag> payload) {
 				var tag = payload.get();
-				tag.find("class", s -> s.endsWith("single-event-title"))  //
+				tag.find(attributeEndsWith("class", "single-event-title"))  //
 				    .stream()
 				    .map(Tag::children)
 				    .filter(not(List::isEmpty))