refactor: refactor the iCalendar tools

BREAKING CHANGES: The java classes just created, but not implemented yet, DO NOT USE THIS COMMIT TO BUILD!

[skip ci]

webcal/src/main/java/com/onixbyte/icalendar/CalendarUtil.java

@@ -0,0 +1,15 @@
+package com.onixbyte.icalendar;
+
+/**
+ * CalendarUtil
+ *
+ * @author Zihlu WANG
+ */
+public final class CalendarUtil {
+
+    private CalendarUtil() {
+    }
+
+
+
+}

webcal/src/main/java/com/onixbyte/icalendar/component/Calendar.java

@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2023-2024 OnixByte.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.onixbyte.icalendar.component;
+
+import com.onixbyte.icalendar.property.calendar.CalendarScale;
+import com.onixbyte.icalendar.property.calendar.Method;
+import com.onixbyte.icalendar.property.calendar.ProductIdentifier;
+import com.onixbyte.icalendar.property.calendar.Version;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+
+/**
+ * {@code WebCalendar} class represents a web calendar in iCalendar format.
+ * <p>
+ * It allows users to create and customise calendar components and events and
+ * generate an <b>iCalendar</b> string containing all the calendar information.
+ * <p>
+ * Usage Example:
+ * <pre>
+ * WebCalendar calendar = new WebCalendar()
+ *         .setName("My Web Calendar")
+ *         .setCompanyName("CodeCrafters Inc.")
+ *         .setProductName("WebCal")
+ *         .setDomainName("codecrafters.org.cn")
+ *         .setMethod("PUBLISH")
+ *         .addEvent(event1)
+ *         .addEvent(event2);
+ * String iCalendarString = calendar.resolve();
+ * </pre>
+ * <p>
+ * The {@code WebCalendar} class is designed to generate an iCalendar string
+ * conforming to the iCalendar specification, which can be used to share
+ * calendar data with other calendar applications or services.
+ *
+ * @author Zihlu Wang
+ * @version 1.1.0
+ * @since 1.0.0
+ */
+public final class Calendar {
+
+    private static final String COMPONENT_NAME = "VCALENDAR";
+
+    /**
+     * This property are OPTIONAL, but MUST NOT occur more than once.
+     */
+    private CalendarScale scale;
+
+    /**
+     * This property are OPTIONAL, but MUST NOT occur more than once.
+     */
+    private Method method;
+
+    /**
+     * This property are REQUIRED, but MUST NOT occur more than once.
+     */
+    private ProductIdentifier productIdentifier;
+
+    /**
+     * This property are REQUIRED, but MUST NOT occur more than once.
+     */
+    private final Version version = Version.VERSION_2_0;
+
+    private String calendarName;
+
+    private final List<CalendarComponent> components = new ArrayList<>();
+
+    /**
+     * Generate and resolve the iCalendar string for the web calendar.
+     *
+     * @return the resolved iCalendar string
+     */
+    public String resolve() {
+        var calendarBuilder = new StringBuilder();
+        calendarBuilder.append("BEGIN:").append(COMPONENT_NAME).append('\n');
+
+        calendarBuilder.append(version.resolve()).append('\n');
+        calendarBuilder.append(productIdentifier.resolve()).append('\n');
+        calendarBuilder.append("X-WR-CALNAME:").append(calendarName).append('\n');
+
+        Optional.ofNullable(scale)
+                .ifPresent((_scale) -> calendarBuilder.append(_scale.resolve()).append('\n'));
+        Optional.ofNullable(method)
+                .ifPresent((_method) -> calendarBuilder.append(_method.resolve()).append('\n'));
+
+        if (!components.isEmpty()) {
+            for (var component : components) {
+                calendarBuilder.append(component.resolve()).append('\n');
+            }
+        }
+
+        calendarBuilder.append("END:").append(COMPONENT_NAME).append('\n');
+        return calendarBuilder.toString();
+    }
+
+}
+

webcal/src/main/java/com/onixbyte/icalendar/component/CalendarComponent.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2023 CodeCraftersCN.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.onixbyte.icalendar.component;
+
+/**
+ * The abstract sealed class {@code WebCalendarNode} represents a node in a web calendar, such as an <a href="">event</a>, a to-do
+ * item, or an alarm. It provides common properties and methods for all calendar components and events.
+ * <p>
+ * Subclasses of {@code WebCalendarNode} should implement the {@link #resolve()} method to generate the corresponding iCalendar content for the specific calendar component or event.
+ *
+ * @author Zihlu Wang
+ * @version 1.1.0
+ * @since 1.0.0
+ */
+public abstract class CalendarComponent {
+
+    public abstract String resolve();
+
+}
+

webcal/src/main/java/com/onixbyte/icalendar/component/Event.java

@@ -0,0 +1,23 @@
+package com.onixbyte.icalendar.component;
+
+import com.onixbyte.icalendar.property.component.DateTimeStamp;
+import com.onixbyte.icalendar.property.component.UniqueIdentifier;
+
+/**
+ * Event
+ *
+ * @author Zihlu WANG
+ */
+public class Event extends CalendarComponent {
+
+    private DateTimeStamp dtStamp;
+
+    private UniqueIdentifier uid;
+
+
+
+    @Override
+    public String resolve() {
+        return "";
+    }
+}

webcal/src/main/java/com/onixbyte/icalendar/config/Formatters.java

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package com.onixbyte.webcal.config;
+package com.onixbyte.icalendar.config;
 
 import java.time.ZoneOffset;
 import java.time.format.DateTimeFormatter;

webcal/src/main/java/com/onixbyte/icalendar/config/package-info.java

@@ -23,11 +23,11 @@
  * <p>The classes in this package include:</p>
  * <ul>
  *     <li>
- *         {@link com.onixbyte.webcal.config.Classification}: An enum
+ *         {@link com.onixbyte.icalendar.config.Classification}: An enum
  *         representing the classification of events in the web calendar.
  *     </li>
  * </ul>
  *
  * @since 1.0.0
  */
-package com.onixbyte.webcal.config;
+package com.onixbyte.icalendar.config;

webcal/src/main/java/com/onixbyte/icalendar/constant/CalendarUserType.java

@@ -0,0 +1,16 @@
+package com.onixbyte.icalendar.constant;
+
+public enum CalendarUserType {
+
+    INDIVIDUAL,
+    GROUP,
+    RESOURCE,
+    ROOM,
+    UNKNOWN,
+    ;
+
+    @Override
+    public String toString() {
+        return name();
+    }
+}

webcal/src/main/java/com/onixbyte/icalendar/constant/Classification.java

@@ -0,0 +1,36 @@
+package com.onixbyte.icalendar.constant;
+
+/**
+ * This property defines the access classification for a calendar component.
+ * <p>
+ * The property can be specified once in a {@link CalendarEvent CalEvent}, {@link
+ * com.onixbyte.icalendar.impl.CalTodo CalTodo}, or {@link com.onixbyte.icalendar.impl.CalJournal CalJournal}
+ * calendar properties.
+ */
+public enum Classification {
+
+    /**
+     * Public events mean that anyone can view and access their detailed information. These events are typically used
+     * in public calendars such as holiday calendars or company-wide event calendars. For public events, anyone with
+     * access to the calendar can see all the event details.
+     */
+    PUBLIC,
+    /**
+     * Private events mean that only invited or specifically authorized individuals can view and access their detailed
+     * information. Private events are visible to the owner of the calendar but not to others. This classification is
+     * commonly used for personal appointments, private meetings, etc.
+     */
+    PRIVATE,
+    /**
+     * Confidential events have detailed information that is not visible to anyone, including the owner of the calendar.
+     * Only individuals who have been granted specific permissions can access the detailed information of confidential
+     * events. This classification is typically used for sensitive business meetings, personal privacy matters, etc.
+     */
+    CONFIDENTIAL,
+    ;
+
+    @Override
+    public String toString() {
+        return name();
+    }
+}

webcal/src/main/java/com/onixbyte/icalendar/package-info.java

@@ -23,16 +23,16 @@
  * The main classes and modules in this package include:
  * <ul>
  *     <li>
- *         {@link com.onixbyte.webcal.WebCalendar}: A class for
+ *         {@link com.onixbyte.icalendar.component.Calendar}: A class for
  *         generating web calendars with customisable settings and events.
  *     </li>
  *     <li>
- *         {@link com.onixbyte.webcal.impl.WebCalendarEvent}: A class
+ *         {@link com.onixbyte.icalendar.impl.CalendarEvent}: A class
  *         representing a single event in a web calendar with various
  *         attributes and options.
  *     </li>
  *     <li>
- *         {@link com.onixbyte.webcal.WebCalendarNode}: An abstract
+ *         {@link com.onixbyte.icalendar.component.CalendarComponent}: An abstract
  *         class serving as the base class for web calendar nodes, providing
  *         common attributes and functionality for events.
  *     </li>
@@ -40,4 +40,4 @@
  *
  * @since 1.0.0
  */
-package com.onixbyte.webcal;
+package com.onixbyte.icalendar;

webcal/src/main/java/com/onixbyte/icalendar/property/Prop.java

@@ -0,0 +1,7 @@
+package com.onixbyte.icalendar.property;
+
+public interface Prop {
+
+    String resolve();
+
+}

webcal/src/main/java/com/onixbyte/icalendar/property/calendar/CalendarScale.java

@@ -0,0 +1,22 @@
+package com.onixbyte.icalendar.property.calendar;
+
+import com.onixbyte.icalendar.property.Prop;
+
+/**
+ * CalendarScale
+ *
+ * @author Zihlu WANG
+ */
+public enum CalendarScale implements Prop {
+
+    GREGORIAN,
+    ;
+
+    private static final String PROPERTY_NAME = "CALSCALE";
+
+    @Override
+    public String resolve() {
+        return PROPERTY_NAME + ':' + this.name();
+    }
+
+}

webcal/src/main/java/com/onixbyte/icalendar/property/calendar/Method.java

@@ -0,0 +1,35 @@
+package com.onixbyte.icalendar.property.calendar;
+
+import com.onixbyte.icalendar.property.Prop;
+
+public enum Method implements Prop {
+
+    PUBLISH("PUBLISH"),
+    REQUEST("REQUEST"),
+    REPLY("REPLY"),
+    ADD("ADD"),
+    CANCEL("CANCEL"),
+    REFRESH("REFRESH"),
+    COUNTER("COUNTER"),
+    DECLINE_COUNTER("DECLINECOUNTER"),
+    ;
+
+    private final String label;
+
+    private static final String PROPERTY_NAME = "METHOD";
+
+    Method(String label) {
+        this.label = label;
+    }
+
+    @Override
+    public String toString() {
+        return label;
+    }
+
+    @Override
+    public String resolve() {
+        return PROPERTY_NAME + ":" + label;
+    }
+
+}

webcal/src/main/java/com/onixbyte/icalendar/property/calendar/ProductIdentifier.java

@@ -0,0 +1,54 @@
+package com.onixbyte.icalendar.property.calendar;
+
+import com.onixbyte.icalendar.property.Prop;
+
+/**
+ * ProductIdentifier
+ *
+ * @author Zihlu WANG
+ */
+public final class ProductIdentifier implements Prop {
+
+    private String value;
+
+    @Override
+    public String resolve() {
+        return PROPERTY_NAME + ":" + value + '\n';
+    }
+
+    public static class Builder {
+        private final ProductIdentifier productIdentifier;
+
+        private Builder() {
+            this.productIdentifier = new ProductIdentifier();
+        }
+
+        public Builder productIdentifier(String productIdentifier) {
+            this.productIdentifier.value = productIdentifier;
+            return this;
+        }
+
+        public Builder productIdentifier(String companyName, String productName) {
+            this.productIdentifier.value = "-//" + companyName + "//" + productName + "//EN";
+            return this;
+        }
+
+        public Builder productIdentifier(String companyName, String productName, String languageTag) {
+            this.productIdentifier.value = "-//" + companyName + "//" + productName + "//" + languageTag;
+            return this;
+        }
+
+        public ProductIdentifier build() {
+            return productIdentifier;
+        }
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    private static final String PROPERTY_NAME = "PRODID";
+
+    private ProductIdentifier() {
+    }
+}

webcal/src/main/java/com/onixbyte/icalendar/property/calendar/Version.java

@@ -0,0 +1,21 @@
+package com.onixbyte.icalendar.property.calendar;
+
+import com.onixbyte.icalendar.property.Prop;
+
+/**
+ * Version
+ *
+ * @author Zihlu WANG
+ */
+public enum Version implements Prop {
+
+    VERSION_2_0,
+    ;
+
+    @Override
+    public String resolve() {
+        return "VERSION:" + switch (this) {
+            case VERSION_2_0 -> "2.0";
+        };
+    }
+}

webcal/src/main/java/com/onixbyte/icalendar/property/component/Attach.java

@@ -0,0 +1,23 @@
+package com.onixbyte.icalendar.property.component;
+
+import com.onixbyte.icalendar.property.Prop;
+import com.onixbyte.icalendar.property.parameter.FormatType;
+
+import java.net.URI;
+
+/**
+ * Attach
+ *
+ * @author Zihlu WANG
+ */
+public final class Attach implements Prop {
+
+    private FormatType formatType;
+
+    private URI uri;
+
+    @Override
+    public String resolve() {
+        return "";
+    }
+}

webcal/src/main/java/com/onixbyte/icalendar/property/component/DateTimeCreated.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.component;
+
+/**
+ * DateTimeCreated
+ *
+ * @author Zihlu WANG
+ */
+public final class DateTimeCreated {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/component/DateTimeStamp.java

@@ -0,0 +1,70 @@
+package com.onixbyte.icalendar.property.component;
+
+import com.onixbyte.icalendar.config.Formatters;
+import com.onixbyte.icalendar.property.Prop;
+
+import java.time.LocalDateTime;
+
+/**
+ * In the case of an {@link com.onixbyte.icalendar.component.Calendar iCalendar} object that specifies a "{@link
+ * com.onixbyte.icalendar.property.calendar.Method Method}" property, this property specifies the date and time that
+ * the instance of the {@link com.onixbyte.icalendar.component.Calendar iCalendar} object was created. In the case of
+ * an {@link com.onixbyte.icalendar.component.Calendar iCalendar} object that doesn't specify a "{@link
+ * com.onixbyte.icalendar.property.calendar.Method Method}" property, this property specifies the date and time that
+ * the information associated with the calendar component was last revised in the calendar store.
+ * <p>
+ * The value MUST be specified in the UTC time format.
+ * <p>
+ * This property is also useful to protocols such as [2447bis] that have inherent latency issues with the delivery of
+ * content. This property will assist in the proper sequencing of messages containing {@link
+ * com.onixbyte.icalendar.component.Calendar iCalendar} objects.
+ * <p>
+ * In the case of an {@link com.onixbyte.icalendar.component.Calendar iCalendar} object that specifies a "{@link
+ * com.onixbyte.icalendar.property.calendar.Method Method}" property, this property differs from the "{@link
+ * DateTimeCreated CREATED}" and "{@link LastModified LAST-MODIFIED}" properties. These two properties are used to
+ * specify when the particular calendar data in the calendar store was created and last modified. This is different
+ * from when the {@link com.onixbyte.icalendar.component.Calendar iCalendar} object representation of the calendar
+ * service information was created or last modified.
+ * <p>
+ * In the case of an {@link com.onixbyte.icalendar.component.Calendar iCalendar} object that specifies a "{@link
+ * com.onixbyte.icalendar.property.calendar.Method METHOD}" property, this property is equivalent to the "{@link
+ * LastModified LAST-MODIFIED}" property.
+ *
+ * @author Zihlu WANG
+ */
+public final class DateTimeStamp implements Prop {
+
+    private static final String PROPERTY_NAME = "DTSTAMP";
+
+    private LocalDateTime value;
+
+    public DateTimeStamp(LocalDateTime value) {
+        this.value = value;
+    }
+
+    public DateTimeStamp() {
+        this.value = LocalDateTime.now();
+    }
+
+    @Override
+    public String resolve() {
+        return PROPERTY_NAME + ":" + Formatters.getUtcDatetimeFormatter().format(value) + '\n';
+    }
+
+    public static class Builder {
+        private final DateTimeStamp dateTimeStamp = new DateTimeStamp();
+
+        public Builder dateTimeStamp(LocalDateTime dateTime) {
+            this.dateTimeStamp.value = dateTime;
+            return this;
+        }
+
+        public DateTimeStamp build() {
+            return dateTimeStamp;
+        }
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+}

webcal/src/main/java/com/onixbyte/icalendar/property/component/LastModified.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.component;
+
+/**
+ * LastModified
+ *
+ * @author Zihlu WANG
+ */
+public final class LastModified {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/component/UniqueIdentifier.java

@@ -0,0 +1,51 @@
+package com.onixbyte.icalendar.property.component;
+
+import com.onixbyte.icalendar.property.Prop;
+
+/**
+ * UniqueIdentifier
+ *
+ * @author Zihlu WANG
+ */
+public final class UniqueIdentifier implements Prop {
+
+    private String value;
+
+    private UniqueIdentifier() {
+    }
+
+    private void setValue(String value) {
+        this.value = value;
+    }
+
+    public static class Builder {
+        private final UniqueIdentifier uniqueIdentifier;
+
+        private Builder() {
+            this.uniqueIdentifier = new UniqueIdentifier();
+        }
+
+        public Builder uniqueIdentifier(String uniqueIdentifier) {
+            this.uniqueIdentifier.value = uniqueIdentifier;
+            return this;
+        }
+
+        public Builder uniqueIdentifier(String uniqueIdentifier, String domainName) {
+            this.uniqueIdentifier.value = uniqueIdentifier + "@" + domainName;
+            return this;
+        }
+
+        public UniqueIdentifier build() {
+            return uniqueIdentifier;
+        }
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    @Override
+    public String resolve() {
+        return "uid:" + this.value + '\n';
+    }
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/AlarmTriggerRelationship.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.parameter;
+
+/**
+ * AlarmTriggerRelationship
+ *
+ * @author Zihlu WANG
+ */
+public class AlarmTriggerRelationship {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/AlternateRepresentation.java

@@ -0,0 +1,48 @@
+package com.onixbyte.icalendar.property.parameter;
+
+import com.onixbyte.icalendar.property.Prop;
+
+import java.net.URI;
+
+/**
+ * Alternate Text Representation specifies a URI that points to an alternate representation for a
+ * textual property value. A property specifying this parameter MUST also include a value that
+ * reflects the default representation of the text value. The URI parameter value MUST be specified
+ * in a quoted-string.
+ * <p>
+ * <b>Note</b>: While there is no restriction imposed on the URI schemes allowed for this
+ * parameter, Content Identifier (CID) [RFC 2392], HTTP [RFC 2616], and HTTPS [RFC 2818] are the
+ * URI schemes most commonly used by current implementations.
+ *
+ * @author Zihlu Wang
+ */
+public final class AlternateRepresentation implements Prop {
+
+    private static final String PROPERTY_NAME = "ALTREP";
+
+    private URI uri;
+
+    private AlternateRepresentation() {
+    }
+
+    public AlternateRepresentation setUri(String uri) {
+        this.uri = URI.create(uri);
+        return this;
+    }
+
+    public AlternateRepresentation setUri(URI uri) {
+        this.uri = uri;
+        return this;
+    }
+
+    public static AlternateRepresentation createInstance(String uri) {
+        var instance = new AlternateRepresentation();
+        instance.uri = URI.create(uri);
+        return instance;
+    }
+
+    @Override
+    public String resolve() {
+        return PROPERTY_NAME + "=\"" + uri.toString() + "\"";
+    }
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/CalendarUserType.java

@@ -0,0 +1,44 @@
+package com.onixbyte.icalendar.property.parameter;
+
+import com.onixbyte.icalendar.property.Prop;
+
+/**
+ * CalendarUserType
+ *
+ * @author Zihlu WANG
+ */
+public enum CalendarUserType implements Prop {
+
+    /**
+     * An individual.
+     */
+    INDIVIDUAL,
+
+    /**
+     * A group of individuals.
+     */
+    GROUP,
+
+    /**
+     * A physical resource.
+     */
+    RESOURCE,
+
+    /**
+     * A room resource.
+     */
+    ROOM,
+
+    /**
+     * Otherwise not known.
+     */
+    UNKNOWN,
+    ;
+
+    private static final String PROPERTY_NAME = "CUTYPE";
+
+    @Override
+    public String resolve() {
+        return PROPERTY_NAME + "=" + this.name();
+    }
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/CommonName.java

@@ -0,0 +1,35 @@
+package com.onixbyte.icalendar.property.parameter;
+
+import com.onixbyte.icalendar.property.Prop;
+
+/**
+ * Common Name can be specified on properties with a CAL-ADDRESS value type. The parameter
+ * specifies the common name to be associated with the calendar user specified by the property.
+ * The parameter value is text. The parameter value can be used for display text to be associated
+ * with the calendar address specified by the property.
+ *
+ * @author Zihlu Wang
+ */
+public final class CommonName implements Prop {
+
+    private String value;
+
+    private CommonName() {
+    }
+
+    public CommonName setValue(String value) {
+        this.value = value;
+        return this;
+    }
+
+    public static CommonName createInstance(String commonName) {
+        var instance = new CommonName();
+        instance.value = commonName;
+        return instance;
+    }
+
+    @Override
+    public String resolve() {
+        return "CN=\"" + this.value + "\"";
+    }
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/Delegatee.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.parameter;
+
+/**
+ * Delegate
+ *
+ * @author Zihlu WANG
+ */
+public class Delegatee {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/Delegator.java

@@ -0,0 +1,47 @@
+package com.onixbyte.icalendar.property.parameter;
+
+import com.onixbyte.icalendar.property.Prop;
+
+import java.net.URI;
+
+/**
+ * Delegator
+ *
+ * @author Zihlu WANG
+ */
+public final class Delegator implements Prop {
+
+    private static final String PROPERTY_NAME = "DELEGATED-FROM";
+
+    private URI calendarUserAddress;
+
+    private Delegator() {
+    }
+
+    private Delegator setCalendarUserAddress(String calendarUserAddress) {
+        this.calendarUserAddress = URI.create(calendarUserAddress);
+        return this;
+    }
+
+    private Delegator setCalendarUserAddress(URI calendarUserAddress) {
+        this.calendarUserAddress = calendarUserAddress;
+        return this;
+    }
+
+    private static Delegator initialiseInstance() {
+        return new Delegator();
+    }
+    
+    public static Delegator createInstance(String calendarUserAddress) {
+        return initialiseInstance().setCalendarUserAddress(calendarUserAddress);
+    }
+
+    public static Delegator createInstance(URI calendarUserAddress) {
+        return initialiseInstance().setCalendarUserAddress(calendarUserAddress);
+    }
+
+    @Override
+    public String resolve() {
+        return PROPERTY_NAME + "=\"" + calendarUserAddress + "\"";
+    }
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/DirectoryEntryReference.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.parameter;
+
+/**
+ * DirectoryEntryReference
+ *
+ * @author Zihlu WANG
+ */
+public class DirectoryEntryReference {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/FormatType.java

@@ -0,0 +1,26 @@
+package com.onixbyte.icalendar.property.parameter;
+
+import com.onixbyte.icalendar.property.Prop;
+
+/**
+ * FormatType
+ *
+ * @author Zihlu WANG
+ */
+public enum FormatType implements Prop {
+
+    JSON("application/json"),
+
+    ;
+
+    private final String ianaRegistry;
+
+    FormatType(String ianaRegistry) {
+        this.ianaRegistry = ianaRegistry;
+    }
+
+    @Override
+    public String resolve() {
+        return "FMTTYPE:" + this.ianaRegistry;
+    }
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/FreeBusyTimeType.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.parameter;
+
+/**
+ * FreeBusyTimeType
+ *
+ * @author Zihlu WANG
+ */
+public class FreeBusyTimeType {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/GroupOrListMembership.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.parameter;
+
+/**
+ * GroupOrListMembership
+ *
+ * @author Zihlu WANG
+ */
+public class GroupOrListMembership {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/InlineEncoding.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.parameter;
+
+/**
+ * InlineEncoding
+ *
+ * @author Zihlu WANG
+ */
+public class InlineEncoding {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/Language.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.parameter;
+
+/**
+ * Language
+ *
+ * @author Zihlu WANG
+ */
+public class Language {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/ParticipationRole.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.parameter;
+
+/**
+ * ParticipationRole
+ *
+ * @author Zihlu WANG
+ */
+public class ParticipationRole {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/ParticipationStatus.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.parameter;
+
+/**
+ * ParticipationStatus
+ *
+ * @author Zihlu WANG
+ */
+public class ParticipationStatus {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/RecurrenceIdentifierRange.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.parameter;
+
+/**
+ * RecurrenceIdentifierRange
+ *
+ * @author Zihlu WANG
+ */
+public class RecurrenceIdentifierRange {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/RelationshipType.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.parameter;
+
+/**
+ * RelationshipType
+ *
+ * @author Zihlu WANG
+ */
+public class RelationshipType {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/RsvpExpectation.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.parameter;
+
+/**
+ * RsvpExpectation
+ *
+ * @author Zihlu WANG
+ */
+public class RsvpExpectation {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/SentBy.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.parameter;
+
+/**
+ * SentBy
+ *
+ * @author Zihlu WANG
+ */
+public class SentBy {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/TimeZoneIdentifier.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.parameter;
+
+/**
+ * TimeZoneIdentifier
+ *
+ * @author Zihlu WANG
+ */
+public class TimeZoneIdentifier {
+}

webcal/src/main/java/com/onixbyte/icalendar/property/parameter/ValueDataType.java

@@ -0,0 +1,9 @@
+package com.onixbyte.icalendar.property.parameter;
+
+/**
+ * ValueDataType
+ *
+ * @author Zihlu WANG
+ */
+public class ValueDataType {
+}

webcal/src/main/java/com/onixbyte/webcal/WebCalendar.java

@@ -1,215 +0,0 @@
-/*
- * Copyright (C) 2023 CodeCraftersCN.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.onixbyte.webcal;
-
-import com.onixbyte.webcal.impl.WebCalendarEvent;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Objects;
-
-/**
- * {@code WebCalendar} class represents a web calendar in iCalendar format.
- * <p>
- * It allows users to create and customise calendar components and events and
- * generate an <b>iCalendar</b> string containing all the calendar information.
- * <p>
- * Usage Example:
- * <pre>
- * WebCalendar calendar = new WebCalendar()
- *         .setName("My Web Calendar")
- *         .setCompanyName("CodeCrafters Inc.")
- *         .setProductName("WebCal")
- *         .setDomainName("codecrafters.org.cn")
- *         .setMethod("PUBLISH")
- *         .addEvent(event1)
- *         .addEvent(event2);
- * String iCalendarString = calendar.resolve();
- * </pre>
- * <p>
- * The {@code WebCalendar} class is designed to generate an iCalendar string
- * conforming to the iCalendar specification, which can be used to share
- * calendar data with other calendar applications or services.
- *
- * @author Zihlu Wang
- * @version 1.1.0
- * @since 1.0.0
- */
-public final class WebCalendar {
-
-    /**
-     * Constructor for WebCalendar class, initializes the list of calendar
-     * components and events.
-     */
-    public WebCalendar() {
-        this.nodes = new ArrayList<>();
-    }
-
-    /**
-     * Set the name of the web calendar.
-     *
-     * @param name the name of the web calendar
-     * @return the WebCalendar object
-     */
-    public WebCalendar setName(String name) {
-        this.name = name;
-        return this;
-    }
-
-    /**
-     * Set the company name associated with the web calendar.
-     *
-     * @param companyName the company name
-     * @return the WebCalendar object
-     */
-    public WebCalendar setCompanyName(String companyName) {
-        this.companyName = companyName;
-        return this;
-    }
-
-    /**
-     * Set the domain name associated with the web calendar.
-     *
-     * @param domainName the domain name
-     * @return the WebCalendar object
-     */
-    public WebCalendar setDomainName(String domainName) {
-        this.domainName = domainName;
-        return this;
-    }
-
-    /**
-     * Set the product name of the web calendar.
-     *
-     * @param productName the product name
-     * @return the WebCalendar object
-     */
-    public WebCalendar setProductName(String productName) {
-        this.productName = productName;
-        return this;
-    }
-
-    /**
-     * Set the method for publishing the web calendar.
-     *
-     * @param method the publishing method
-     * @return the WebCalendar object
-     */
-    public WebCalendar setMethod(String method) {
-        this.method = method;
-        return this;
-    }
-
-    /**
-     * Add an node to the web calendar.
-     *
-     * @param node the calendar component or event to be added
-     * @return the WebCalendar object
-     */
-    public WebCalendar addNode(WebCalendarNode node) {
-        this.nodes.add(node);
-        return this;
-    }
-
-    /**
-     * Add an event to the web calendar.
-     *
-     * @param event the calendar component or event to be added
-     * @return the WebCalendar object
-     */
-    public WebCalendar addEvent(WebCalendarEvent event) {
-        this.nodes.add(event);
-        return this;
-    }
-
-    /**
-     * Generate and resolve the iCalendar string for the web calendar.
-     *
-     * @return the resolved iCalendar string
-     */
-    public String resolve() {
-        var eventBuilder = new StringBuilder();
-        if (!nodes.isEmpty()) {
-            for (var node : nodes) {
-                if (Objects.isNull(node.getDomainName()) || node.getDomainName().isBlank()) {
-                    node.setDomainName(this.domainName);
-                }
-
-                eventBuilder.append(node.resolve());
-            }
-        }
-
-        return "BEGIN:" + TAG + "\n" +
-                "PRODID:-//" + companyName + "//" + productName + "//EN\n" +
-                "VERSION:" + version + "\n" +
-                "X-WR-CALNAME:" + name + "\n" +
-                eventBuilder + "\n" +
-                "END:" + TAG;
-    }
-
-    /**
-     * The {@code VCALENDAR} tag for iCalendar format
-     */
-    private final static String TAG = "VCALENDAR";
-
-    /**
-     * The name of this calendar.
-     */
-    private String name;
-
-    /**
-     * The company who produces this calendar.
-     * <p>
-     * This property will be used in {@code PRODID}.
-     */
-    private String companyName;
-
-    /**
-     * The product name.
-     * <p>
-     * This property will be used in {@code PRODID}
-     */
-    private String productName;
-
-    /**
-     * The producer's domain name.
-     */
-    private String domainName;
-
-    /**
-     * Scale of this calendar.
-     */
-    private final String scale = "GREGORIAN";
-
-    /**
-     * The method of this calendar.
-     */
-    private String method;
-
-    /**
-     * The version of this calendar.
-     */
-    private final String version = "2.0";
-
-    /**
-     * List of calendar components and events
-     */
-    private final List<WebCalendarNode> nodes;
-
-}
-

webcal/src/main/java/com/onixbyte/webcal/WebCalendarNode.java

@@ -1,124 +0,0 @@
-/*
- * Copyright (C) 2023 CodeCraftersCN.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.onixbyte.webcal;
-
-import com.onixbyte.webcal.config.Classification;
-
-import java.time.Duration;
-import java.time.LocalDateTime;
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * The abstract sealed class {@code WebCalendarNode} represents a node in the
- * web calendar, such as an event, a to-do item, or an alarm. It provides
- * common properties and methods for all calendar components and events.
- * <p>
- * Subclasses of {@code WebCalendarNode} should implement the {@link
- * #resolve()} method to generate the corresponding iCalendar content for the
- * specific calendar component or event.
- *
- * @author Zihlu Wang
- * @version 1.1.0
- * @since 1.0.0
- */
-public abstract class WebCalendarNode {
-
-    // Common properties for all calendar components and events
-    protected List<String> categories;
-
-    protected Classification classification;
-
-    protected String comment;
-
-    protected String description;
-
-    protected String location;
-
-    protected Integer percentComplete;
-
-    protected Integer priority;
-
-    protected String summary;
-
-    protected LocalDateTime end;
-
-    protected LocalDateTime start;
-
-    protected Duration duration;
-
-    protected String url;
-
-    protected String uid;
-
-    protected String domainName;
-
-    protected String timezone;
-
-    /**
-     * Constructor for WebCalendarNode class, initializes the list of
-     * categories associated with the calendar component or event.
-     */
-    protected WebCalendarNode() {
-        this.categories = new ArrayList<>();
-    }
-
-    /**
-     * Set the domain name associated with the calendar component or event.
-     *
-     * @param domainName the domain name
-     * @return the WebCalendarNode object
-     */
-    public WebCalendarNode setDomainName(String domainName) {
-        this.domainName = domainName;
-        return this;
-    }
-
-    /**
-     * Get the domain name.
-     *
-     * @return the domain name of this event
-     */
-    public String getDomainName() {
-        return this.domainName;
-    }
-
-    /**
-     * Resolve the list of categories into a comma-separated string.
-     *
-     * @return the comma-separated string of categories
-     */
-    protected String resolveCategories() {
-        var builder = new StringBuilder();
-        if (categories != null && !categories.isEmpty()) {
-            categories.forEach(item -> builder.append(item).append(","));
-            return builder.substring(0, builder.length() - 1);
-        }
-        return builder.toString();
-    }
-
-    /**
-     * Generate and resolve the iCalendar content for the calendar component or
-     * event.
-     *
-     * @return the resolved iCalendar content
-     */
-    public abstract String resolve();
-
-}
-

webcal/src/main/java/com/onixbyte/webcal/config/Classification.java

@@ -1,74 +0,0 @@
-/*
- * Copyright (C) 2023 CodeCraftersCN.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.onixbyte.webcal.config;
-
-import lombok.Getter;
-
-/**
- * The {@code Classification} enum represents the classification levels of
- * calendar content based on <b>RFC-5545</b>.
- * <p>
- * Calendar events or components can be classified as one of the following
- * levels:
- * <ul>
- *     <li>
- *         {@link #PUBLIC}: Indicates that the calendar content is public and
- *         can be freely distributed.
- *     </li>
- *     <li>
- *         {@link #PRIVATE}: Indicates that the calendar content is private and
- *         should not be shared with others.
- *     </li>
- *     <li>
- *         {@link #CONFIDENTIAL}: Indicates that the calendar content is
- *         confidential and should be kept strictly private.
- *     </li>
- * </ul>
- *
- * @author Zihlu Wang
- * @version 1.1.0
- * @since 1.0.0
- */
-public enum Classification {
-
-    /**
-     * Public classification level.
-     * <p>
-     * Indicates that the calendar content is public and can be freely
-     * distributed.
-     */
-    PUBLIC,
-
-    /**
-     * Private classification level.
-     * <p>
-     * Indicates that the calendar content is private and should not be shared
-     * with others.
-     */
-    PRIVATE,
-
-    /**
-     * Confidential classification level.
-     * <p>
-     * Indicates that the calendar content is confidential and should be kept
-     * strictly private.
-     */
-    CONFIDENTIAL,
-    ;
-
-}

webcal/src/main/java/com/onixbyte/webcal/impl/WebCalendarEvent.java

@@ -1,293 +0,0 @@
-/*
- * Copyright (C) 2023 CodeCraftersCN.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.onixbyte.webcal.impl;
-
-import com.onixbyte.webcal.WebCalendarNode;
-import com.onixbyte.webcal.config.Classification;
-import com.onixbyte.webcal.config.Formatters;
-
-import java.text.MessageFormat;
-import java.time.Duration;
-import java.time.LocalDateTime;
-import java.time.ZoneId;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.Optional;
-import java.util.UUID;
-
-/**
- * The {@code WebCalendarEvent} class represents an event in the web calendar.
- * It extends the abstract class WebCalendarNode and provides additional
- * methods to set properties specific to events.
- * <p>
- * Users can use the methods in this class to add categories, set the
- * classification, add comments, descriptions, locations, set percent
- * complete, set priority, set summary, set start time, set end time, set
- * duration, set URL, set UID, and set timezone for the event. After setting
- * the properties, users can call the {@link #resolve()} method to generate the
- * corresponding iCalendar content for the event.
- *
- * @author Zihlu Wang
- * @version 1.1.0
- * @since 1.0.0
- */
-public final class WebCalendarEvent extends WebCalendarNode {
-
-    /**
-     * Add categories to the event.
-     *
-     * @param categories the categories to add
-     * @return the WebCalendarEvent object
-     */
-    public WebCalendarEvent addCategories(String... categories) {
-        this.categories.addAll(Arrays.asList(categories));
-        return this;
-    }
-
-    /**
-     * Add a collection of categories to the event.
-     *
-     * @param categories the collection of categories to add
-     * @return the WebCalendarEvent object
-     */
-    public WebCalendarEvent addCategories(Collection<String> categories) {
-        this.categories.addAll(categories);
-        return this;
-    }
-
-    /**
-     * Add a single category to the event.
-     *
-     * @param category the category to add
-     * @return the WebCalendarEvent object
-     */
-    public WebCalendarEvent addCategory(String category) {
-        this.categories.add(category);
-        return this;
-    }
-
-    /**
-     * Set the classification of the event.
-     *
-     * @param classification the classification to set
-     * @return the WebCalendarEvent object
-     */
-    public WebCalendarEvent setClassification(Classification classification) {
-        this.classification = classification;
-        return this;
-    }
-
-    /**
-     * Set the comment for the event.
-     *
-     * @param comment the comment to set
-     * @return the WebCalendarEvent object
-     */
-    public WebCalendarEvent setComment(String comment) {
-        this.comment = comment;
-        return this;
-    }
-
-    /**
-     * Set the description for the event.
-     *
-     * @param description the description to set
-     * @return the WebCalendarEvent object
-     */
-    public WebCalendarEvent setDescription(String description) {
-        this.description = description;
-        return this;
-    }
-
-    /**
-     * Set the location for the event.
-     *
-     * @param location the location to set
-     * @return the WebCalendarEvent object
-     */
-    public WebCalendarEvent setLocation(String location) {
-        this.location = location;
-        return this;
-    }
-
-    /**
-     * Set the percent complete for the event.
-     *
-     * @param percentComplete the percent complete to set
-     * @return the WebCalendarEvent object
-     * @throws IllegalArgumentException if the percent complete is out of range (0 ~ 100)
-     */
-    public WebCalendarEvent setPercentComplete(Integer percentComplete) {
-        if (percentComplete < 0 || percentComplete > 100) {
-            throw new IllegalArgumentException("Percent out of range (0 ~ 100)");
-        }
-        this.percentComplete = percentComplete;
-        return this;
-    }
-
-    /**
-     * Set the priority for the event.
-     *
-     * @param priority the priority to set
-     * @return the WebCalendarEvent object
-     * @throws IllegalArgumentException if the priority is out of range (0 ~ 9)
-     */
-    public WebCalendarEvent setPriority(Integer priority) {
-        if (priority < 0 || priority > 9) {
-            throw new IllegalArgumentException("The priority you provide is out of range (0 ~ 9).");
-        }
-        this.priority = priority;
-        return this;
-    }
-
-    /**
-     * Set the summary for the event.
-     *
-     * @param summary the summary to set
-     * @return the WebCalendarEvent object
-     */
-    public WebCalendarEvent setSummary(String summary) {
-        this.summary = summary;
-        return this;
-    }
-
-    /**
-     * Set the end time for the event.
-     *
-     * @param end the end time to set
-     * @return the WebCalendarEvent object
-     * @throws IllegalStateException if the field DURATION has been set before
-     */
-    public WebCalendarEvent setEnd(LocalDateTime end) {
-        if (this.duration != null) {
-            throw new IllegalStateException("You have set the field DURATION before, please remove it or remove setEnd.");
-        }
-        this.end = end;
-        return this;
-    }
-
-    /**
-     * Set the start time for the event.
-     *
-     * @param start the start time to set
-     * @return the WebCalendarEvent object
-     */
-    public WebCalendarEvent setStart(LocalDateTime start) {
-        this.start = start;
-        return this;
-    }
-
-    /**
-     * Set the duration for the event.
-     *
-     * @param duration the duration to set
-     * @return the WebCalendarEvent object
-     * @throws IllegalStateException if the field END has been set before
-     */
-    public WebCalendarEvent setDuration(Duration duration) {
-        if (this.end != null) {
-            throw new IllegalStateException("You have set the field END before, please remove it or remove setDuration.");
-        }
-        this.duration = duration;
-        return this;
-    }
-
-    /**
-     * Set the URL for the event.
-     *
-     * @param url the URL to set
-     * @return the WebCalendarEvent object
-     */
-    public WebCalendarEvent setUrl(String url) {
-        this.url = url;
-        return this;
-    }
-
-    /**
-     * Set the UID for the event.
-     *
-     * @param uid the UID to set
-     * @return the WebCalendarEvent object
-     */
-    public WebCalendarEvent setUid(String uid) {
-        this.uid = uid;
-        return this;
-    }
-
-    /**
-     * Set the domain name for the event.
-     *
-     * @param domainName the domain name to set
-     * @return the WebCalendarEvent object
-     */
-    public WebCalendarEvent setDomainName(String domainName) {
-        this.domainName = domainName;
-        return this;
-    }
-
-    /**
-     * Set the timezone for the event.
-     *
-     * @param timezone the timezone to set
-     * @return the WebCalendarEvent object
-     */
-    public WebCalendarEvent setTimezone(String timezone) {
-        this.timezone = timezone;
-        return this;
-    }
-
-    /**
-     * Generate and resolve the iCalendar content for the event.
-     *
-     * @return the resolved iCalendar content for the event
-     */
-    @Override
-    public String resolve() {
-        var now = LocalDateTime.now().atZone(ZoneId.systemDefault());
-        return MessageFormat.format("""
-                        BEGIN:{0}
-                        UID:{1}
-                        DTSTAMP:{2}
-                        DTSTART:{3}
-                        DURATION:PT{6}S
-                        {4}{5}{7}{8}{9}{10}{11}{12}
-                        END:{0}""",
-                /* 0 - tag */TAG,
-                /* 1 - uid */ Optional.ofNullable(uid).orElse(UUID.randomUUID().toString()) + "@" + domainName,
-                /* 2 - dtstamp */ now.format(Formatters.getUtcDatetimeFormatter()),
-                /* 3 - start time */ start.atZone(ZoneId.systemDefault()).format(Formatters.getUtcDatetimeFormatter()),
-                /* 4 - summary */ Optional.ofNullable(summary).map((item) -> "\nSUMMARY:" + item).orElse(""),
-                /* 5 - categories */ Optional.ofNullable(categories)
-                        .map((item) -> !item.isEmpty() ? "\nCATEGORIES:" + resolveCategories() : null).orElse(""),
-                /* 6 - duration */ Optional.ofNullable(duration)
-                        .map((_duration) -> String.valueOf(_duration.getSeconds()))
-                        .orElse(Optional.ofNullable(end)
-                                .map((_end) -> String.valueOf(Duration.between(_end, start).getSeconds()))
-                                .orElse("0")),
-                /* 7 - classification */ Optional.ofNullable(classification).map((_classification) -> "\nCLASS:" + _classification + "\n").orElse(""),
-                /* 8 - comment */ Optional.ofNullable(comment).map((_comment) -> "\nCOMMENT:" + _comment + "\n").orElse(""),
-                /* 9 - location */ Optional.ofNullable(location).map((_location) -> "\nLOCATION:" + _location).orElse(""),
-                /* 10 = percentComplete */ Optional.ofNullable(percentComplete).map((_percentComplete) -> "\nPERCENT-COMPLETE:" + _percentComplete).orElse(""),
-                /* 11 - description */ Optional.ofNullable(description).map((_description) -> "\nDESCRIPTION:" + _description).orElse(""),
-                /* 12 - priority */ Optional.ofNullable(priority).map((_priority) -> "\nPRIORITY:" + _priority).orElse("")
-        );
-    }
-
-    private final static String TAG = "VEVENT";
-
-}

webcal/src/test/java/com/onixbyte/icalendar/test/TestCalendar.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2023 CodeCraftersCN.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.onixbyte.icalendar.test;
+
+import com.onixbyte.icalendar.component.Calendar;
+import lombok.extern.slf4j.Slf4j;
+import org.junit.jupiter.api.Test;
+
+import java.time.LocalDateTime;
+import java.util.UUID;
+
+/**
+ * TestWebCalendar
+ *
+ * @author Zihlu Wang
+ */
+@Slf4j
+public class TestCalendar {
+
+    @Test
+    void testWebCalendar() {
+
+    }
+
+}

webcal/src/test/java/com/onixbyte/webcal/test/TestWebCalendar.java

@@ -1,56 +0,0 @@
-/*
- * Copyright (C) 2023 CodeCraftersCN.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.onixbyte.webcal.test;
-
-import com.onixbyte.webcal.WebCalendar;
-import com.onixbyte.webcal.impl.WebCalendarEvent;
-import com.onixbyte.webcal.config.Classification;
-import lombok.extern.slf4j.Slf4j;
-import org.junit.jupiter.api.Test;
-
-import java.time.LocalDateTime;
-import java.util.UUID;
-
-/**
- * TestWebCalendar
- *
- * @author Zihlu Wang
- */
-@Slf4j
-public class TestWebCalendar {
-
-    @Test
-    void testWebCalendar() {
-        var calendar = new WebCalendar();
-        calendar.setCompanyName("Code Crafters")
-                .setDomainName("codecrafters.org.cn")
-                .setName("Code Crafters SPECIAL EVENT")
-                .setProductName("Code Crafters SPECIAL EVENT");
-
-        calendar.addEvent(new WebCalendarEvent()
-                .setClassification(Classification.PUBLIC)
-                .setStart(LocalDateTime.of(2023, 8, 6, 0, 0, 0))
-                .setEnd(LocalDateTime.of(2023, 8, 6, 8, 0, 0))
-                .setLocation("Hong Kong University, Pokfulam, Central West, Hong Kong S.A.R")
-                .setUid(UUID.randomUUID().toString())
-                .setTimezone("Asia/Hong_Kong"));
-
-        System.out.println(calendar.resolve());
-    }
-
-}