added importer for CafeWagner

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>
2025-01-02 00:52:21 +01:00
parent e0dde9aa9e
commit 3f80b13d8e
9 changed files with 270 additions and 59 deletions
@@ -3,10 +3,18 @@ package de.srsoftware.cal;

 import static de.srsoftware.tools.Error.error;
 import static de.srsoftware.tools.Result.transform;
+import static de.srsoftware.tools.Tag.STYLE;
+import static java.lang.System.Logger.Level.WARNING;

+import de.srsoftware.cal.api.Attachment;
 import de.srsoftware.cal.api.Coords;
 import de.srsoftware.tools.Payload;
 import de.srsoftware.tools.Result;
+import de.srsoftware.tools.Tag;
+import java.net.MalformedURLException;
+import java.net.URI;
+import java.net.URISyntaxException;
+import java.net.URL;
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.LocalTime;
@@ -33,6 +41,8 @@ public class Util {

 	public static final Pattern GERMAN_DATE_PATTERN = Pattern.compile("\\D(\\d\\d?)\\.(\\d\\d?)\\.(\\d{4})\\D");
 	public static final Pattern GERMAN_TIME_PATTERN = Pattern.compile("\\D(\\d\\d?):(\\d\\d?)(:(\\d\\d?))?\\D");
+	private static final Pattern BG_IMAGE_URL = Pattern.compile("background(-image)?:\\surl\\(([^)]+)\\)");
+	private static final System.Logger LOG    = System.getLogger(Util.class.getSimpleName());

 	private Util(){}

@@ -114,6 +124,24 @@ public class Util {
 		return error("Failed to find time");
 	}

+
+	public static Result<Integer> toNumericMonth(String month) {
+		month = month.toLowerCase();
+		if (month.startsWith("ja")) return Payload.of(1);
+		if (month.startsWith("f")) return Payload.of(2);
+		if ("may".equals(month) || "mai".equals(month)) return Payload.of(5);
+		if (month.startsWith("m")) return Payload.of(3);
+		if (month.startsWith("ap")) return Payload.of(4);
+		if (month.startsWith("jun")) return Payload.of(6);
+		if (month.startsWith("jul")) return Payload.of(7);
+		if (month.startsWith("au")) return Payload.of(8);
+		if (month.startsWith("s")) return Payload.of(9);
+		if (month.startsWith("o")) return Payload.of(10);
+		if (month.startsWith("n")) return Payload.of(11);
+		if (month.startsWith("d")) return Payload.of(12);
+		return error("Failed to recognize \"%s\" as a month!", month);
+	}
+
 	/**
 	 * wraps a text (list of vevents in a vcalendar, as described in th <a href="https://datatracker.ietf.org/doc/html/rfc5545#section-3.4">iCalendar spec</a>
 	 * @param ical the vevents list
@@ -132,4 +160,38 @@ public class Util {
 		}
 		return ical;
 	}
+
+	public static Result<String> extractBackgroundImage(Tag tag, String baseUrl) {
+		var style = tag.get(STYLE);
+		if (style != null){
+			var matcher = BG_IMAGE_URL.matcher(style);
+			if (matcher.find()) {
+				var link = matcher.group(2);
+				return Payload.of(link.contains("://") ? link : baseUrl+link);
+			}
+		}
+		return error("Failed to findbackground image url in %s",tag);
+	}
+
+	public static Result<Attachment> toAttachment(Result<URL> urlResult) {
+		var opt = urlResult.optional();
+		if (opt.isEmpty()) return transform(urlResult);
+		try {
+			var mime = opt.get().openConnection().getContentType();
+			return Payload.of(new Attachment(opt.get(), mime));
+		} catch (Exception e) {
+			LOG.log(WARNING, "Failed to read mime type of {0}", opt.get());
+			return error("Failed to read mime type of %s", opt.get());
+		}
+	}
+
+	public static Result<URL> url(Result<String> urlResult) {
+		if (urlResult.optional().isEmpty()) return transform(urlResult);
+		var url = urlResult.optional().get();
+		try {
+			return Payload.of(new URI(url).toURL());
+		} catch (MalformedURLException | URISyntaxException e) {
+			return error(e, "Failed to create URL of %s", url);
+		}
+	}
 }