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event-management/src/commonMain/kotlin/at/mocode/events/EventManagement.kt

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+package at.mocode.events
+
+/**
+ * Simple Event Management class for testing KMP configuration
+ */
+class EventManagement {
+    fun createEvent(name: String): String {
+        return "Event created: $name"
+    }
+}
+
+fun main() {
+    val eventManager = EventManagement()
+    println(eventManager.createEvent("Test Event"))
+}

event-management/src/commonMain/kotlin/at/mocode/events/domain/model/Veranstaltung.kt

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+package at.mocode.events.domain.model
+
+import at.mocode.enums.SparteE
+import at.mocode.serializers.KotlinInstantSerializer
+import at.mocode.serializers.KotlinLocalDateSerializer
+import at.mocode.serializers.UuidSerializer
+import com.benasher44.uuid.Uuid
+import com.benasher44.uuid.uuid4
+import kotlinx.datetime.Clock
+import kotlinx.datetime.Instant
+import kotlinx.datetime.LocalDate
+import kotlinx.datetime.TimeZone
+import kotlinx.serialization.Serializable
+
+/**
+ * Domain model representing an event/competition in the event management system.
+ *
+ * This entity represents a sporting event that can contain multiple tournaments
+ * and competitions. It serves as the main aggregate root for event planning.
+ *
+ * @property veranstaltungId Unique internal identifier for this event (UUID).
+ * @property name Name of the event.
+ * @property beschreibung Description of the event.
+ * @property startDatum Start date of the event.
+ * @property endDatum End date of the event.
+ * @property ort Location where the event takes place.
+ * @property veranstalterVereinId ID of the organizing club/association.
+ * @property sparten List of sport disciplines included in this event.
+ * @property istAktiv Whether the event is currently active.
+ * @property istOeffentlich Whether the event is public.
+ * @property maxTeilnehmer Maximum number of participants (optional).
+ * @property anmeldeschluss Registration deadline.
+ * @property createdAt Timestamp when this record was created.
+ * @property updatedAt Timestamp when this record was last updated.
+ */
+@Serializable
+data class Veranstaltung(
+    @Serializable(with = UuidSerializer::class)
+    val veranstaltungId: Uuid = uuid4(),
+
+    // Basic Information
+    var name: String,
+    var beschreibung: String? = null,
+
+    // Dates
+    @Serializable(with = KotlinLocalDateSerializer::class)
+    var startDatum: LocalDate,
+    @Serializable(with = KotlinLocalDateSerializer::class)
+    var endDatum: LocalDate,
+
+    // Location and Organization
+    var ort: String,
+    @Serializable(with = UuidSerializer::class)
+    var veranstalterVereinId: Uuid,
+
+    // Event Details
+    var sparten: List<SparteE> = emptyList(),
+    var istAktiv: Boolean = true,
+    var istOeffentlich: Boolean = true,
+    var maxTeilnehmer: Int? = null,
+
+    @Serializable(with = KotlinLocalDateSerializer::class)
+    var anmeldeschluss: LocalDate? = null,
+
+    // Audit Fields
+    @Serializable(with = KotlinInstantSerializer::class)
+    val createdAt: Instant = Clock.System.now(),
+    @Serializable(with = KotlinInstantSerializer::class)
+    var updatedAt: Instant = Clock.System.now()
+) {
+    /**
+     * Checks if the event is currently accepting registrations.
+     */
+    fun isRegistrationOpen(): Boolean {
+        // Simplified implementation - can be enhanced with proper date comparison
+        return istAktiv && anmeldeschluss != null
+    }
+
+    /**
+     * Returns the duration of the event in days.
+     */
+    fun getDurationInDays(): Int {
+        return (endDatum.toEpochDays() - startDatum.toEpochDays()).toInt() + 1
+    }
+
+    /**
+     * Checks if the event spans multiple days.
+     */
+    fun isMultiDay(): Boolean {
+        return startDatum != endDatum
+    }
+
+    /**
+     * Validates that the event data is consistent.
+     */
+    fun validate(): List<String> {
+        val errors = mutableListOf<String>()
+
+        if (name.isBlank()) {
+            errors.add("Event name is required")
+        }
+
+        if (ort.isBlank()) {
+            errors.add("Event location is required")
+        }
+
+        if (endDatum < startDatum) {
+            errors.add("End date cannot be before start date")
+        }
+
+        anmeldeschluss?.let { deadline ->
+            if (deadline > startDatum) {
+                errors.add("Registration deadline cannot be after event start date")
+            }
+        }
+
+        maxTeilnehmer?.let { max ->
+            if (max <= 0) {
+                errors.add("Maximum participants must be positive")
+            }
+        }
+
+        return errors
+    }
+
+    /**
+     * Creates a copy of this event with updated timestamp.
+     */
+    fun withUpdatedTimestamp(): Veranstaltung {
+        return this.copy(updatedAt = Clock.System.now())
+    }
+}