working on calendar application

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

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

@@ -2,4 +2,5 @@ description = "OpenCloudCal : API"
 
 dependencies {
     implementation("de.srsoftware:tools.util:1.2.1")
+    implementation("org.json:json:20240303")
 }

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

@@ -4,6 +4,7 @@ package de.srsoftware.cal.api;
 import java.time.LocalDateTime;
 import java.util.Optional;
 import java.util.Set;
+import org.json.JSONObject;
 
 /**
  * This is the central object of the calendar: An appointment
@@ -41,6 +42,12 @@ public interface Appointment {
 	long id();
 
 
+	/**
+	 * get a json representation of this Appointment
+	 * @return a JSON Object
+	 */
+	JSONObject json();
+
 	/**
 	 * descriptive text of the location, e.g. address
 	 * @return location text

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

@@ -2,6 +2,8 @@
 package de.srsoftware.cal.api;
 
 import java.net.URL;
+import java.util.Map;
+import org.json.JSONObject;
 
 /**
  * an attachment for appointments
@@ -9,4 +11,7 @@ import java.net.URL;
  * @param mime the mime type of the attached document
  */
 public record Attachment(URL url, String mime) {
+	public JSONObject json() {
+		return new JSONObject(Map.of("url", url.toString(), "mime", mime));
+	}
 }

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

@@ -1,10 +1,16 @@
 /* © SRSoftware 2024 */
 package de.srsoftware.cal.api;
 
+import java.util.Map;
+import org.json.JSONObject;
+
 /**
  * cartesian coords
  * @param longitude the longitude
  * @param latitude the latitude
  */
 public record Coords(double longitude, double latitude) {
+	public JSONObject json() {
+		return new JSONObject(Map.of("lon", longitude, "lat", latitude));
+	}
 }

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

@@ -2,6 +2,8 @@
 package de.srsoftware.cal.api;
 
 import java.net.URL;
+import java.util.Map;
+import org.json.JSONObject;
 
 /**
  * Links are additional content that may be added to appointments
@@ -9,4 +11,7 @@ import java.net.URL;
  * @param desciption some information about the target of the link
  */
 public record Link(URL url, String desciption) {
+	public JSONObject json() {
+		return new JSONObject(Map.of("description", desciption(), "url", url().toString()));
+	}
 }