added importer for Gerberstraße Weimar

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

de.srsoftware.cal.importer/src/main/java/de/srsoftware/cal/importer/weimar/Gerberstrasse.java

@@ -0,0 +1,146 @@
+package de.srsoftware.cal.importer.weimar;
+
+import de.srsoftware.cal.BaseImporter;
+import de.srsoftware.cal.Util;
+import de.srsoftware.cal.api.Coords;
+import de.srsoftware.tools.Payload;
+import de.srsoftware.tools.Result;
+import de.srsoftware.tools.Tag;
+
+import java.security.NoSuchAlgorithmException;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.util.List;
+import java.util.Objects;
+import java.util.function.Predicate;
+
+import static de.srsoftware.cal.Util.parseGermanDate;
+import static de.srsoftware.cal.Util.parseGermanTime;
+import static de.srsoftware.tools.Result.transform;
+import static de.srsoftware.tools.Tag.*;
+import static de.srsoftware.tools.TagFilter.*;
+
+public class Gerberstrasse extends BaseImporter {
+	private static final Coords DEFAULT_COORDS = new Coords(50.98276, 11.3311);
+	private static final String DEFAULT_LOCATION = "Gerberstraße 3, 99423 Weimar";
+
+	public Gerberstrasse() throws NoSuchAlgorithmException {
+		super();
+	}
+
+	@Override
+	protected String baseUrl() {
+		return "https://www.gerberstrasse.org";
+	}
+
+	@Override
+	public String description() {
+		return "Importer für Veranstaltungen der Gerberstraße 3 in Weimar";
+	}
+
+	@Override
+	protected Predicate<Tag> extractAttachmentsFilter() {
+		return attributeEquals(CLASS,"article");
+	}
+
+	@Override
+	protected Predicate<Tag> extractDescriptionFilter() {
+		return attributeStartsWith(CLASS,"col-").and(tag -> !tag.find(attributeContains(CLASS,"-related-")).isEmpty());
+	}
+
+	@Override
+	protected Result<Coords> extractCoords(Tag eventTag) {
+		return Payload.of(DEFAULT_COORDS);
+	}
+
+	@Override
+	protected Predicate<Tag> extractEndDateFilter() {
+		return null;
+	}
+
+	@Override
+	protected Predicate<Tag> extractEndTimeFilter() {
+		return null;
+	}
+
+	@Override
+	protected Predicate<Tag> extractEventTagFilter() {
+		return attributeEquals(CLASS,"article");
+	}
+
+	@Override
+	protected Result<List<String>> extractEventUrls(Result<Tag> programPage) {
+		var opt = programPage.optional();
+		if (opt.isEmpty()) return transform(programPage);
+		var list = opt.get().find(attributeEquals(CLASS,"news-list-view")).stream()
+				.findFirst().stream()
+				.flatMap(tag -> tag.find(IS_ANCHOR).stream())
+				.map(tag -> tag.get(HREF))
+				.filter(Objects::nonNull)
+				.filter(link -> link.contains("/veranstaltung/"))
+				.distinct()
+				.map(url -> url.contains("://")?url : baseUrl()+url)
+				.toList();
+		return Payload.of(list);
+	}
+
+	@Override
+	protected Predicate<Tag> extractLinksFilter() {
+		return attributeEquals(CLASS,"article");
+	}
+
+	@Override
+	protected Result<String> extractLocation(Tag eventTag) {
+		return Payload.of(DEFAULT_LOCATION);
+	}
+
+	@Override
+	protected Predicate<Tag> extractLocationFilter() {
+		return null;
+	}
+
+	@Override
+	protected Predicate<Tag> extractStartDateFilter() {
+		return attributeEquals("itemprop","datePublished");
+	}
+
+	@Override
+	protected Predicate<Tag> extractStartTimeFilter() {
+		return attributeEquals("itemprop","datePublished");
+	}
+
+	@Override
+	protected List<String> extractTags(Tag eventTag) {
+		return List.of("Gerberstraße","Weimar","besetztesHaus");
+	}
+
+	@Override
+	protected Predicate<Tag> extractTitleFilter() {
+		return ofType("h1");
+	}
+
+	@Override
+	protected Result<LocalDate> parseEndDate(String string) {
+		return null;
+	}
+
+	@Override
+	protected Result<LocalTime> parseEndTime(String string) {
+		return null;
+	}
+
+	@Override
+	protected Result<LocalDate> parseStartDate(String string) {
+		return parseGermanDate(string);
+	}
+
+	@Override
+	protected Result<LocalTime> parseStartTime(String string) {
+		return parseGermanTime(string);
+	}
+
+	@Override
+	protected String programURL() {
+		return baseUrl()+"/veranstaltungen";
+	}
+}