From af75965a312b928f99d9153536702b2d851ff2c2 Mon Sep 17 00:00:00 2001
From: Jean-Luc Makiola <business@jeanlucmakiola.de>
Date: Mon, 8 Jun 2026 17:36:39 +0200
Subject: [PATCH] =?UTF-8?q?domain:=20add=20pure-Kotlin=20models=20(Calenda?=
 =?UTF-8?q?rSource,=20EventInstance,=20EventDetail,=20=E2=80=A6)?=
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---
 .../jeanlucmakiola/calendula/domain/Models.kt | 54 ++++++++++++++
 .../calendula/domain/ModelsTest.kt            | 74 +++++++++++++++++++
 2 files changed, 128 insertions(+)
 create mode 100644 app/src/main/java/de/jeanlucmakiola/calendula/domain/Models.kt
 create mode 100644 app/src/test/java/de/jeanlucmakiola/calendula/domain/ModelsTest.kt

diff --git a/app/src/main/java/de/jeanlucmakiola/calendula/domain/Models.kt b/app/src/main/java/de/jeanlucmakiola/calendula/domain/Models.kt
new file mode 100644
index 0000000..5ccb921
--- /dev/null
+++ b/app/src/main/java/de/jeanlucmakiola/calendula/domain/Models.kt
@@ -0,0 +1,54 @@
+package de.jeanlucmakiola.calendula.domain
+
+import kotlin.time.Instant
+
+data class CalendarSource(
+    val id: Long,
+    val displayName: String,
+    val accountName: String,
+    val accountType: String,
+    val color: Int,
+    val isVisibleInSystem: Boolean,
+)
+
+data class EventInstance(
+    val instanceId: Long,
+    val eventId: Long,
+    val calendarId: Long,
+    val title: String,
+    val start: Instant,
+    val end: Instant,
+    val isAllDay: Boolean,
+    val color: Int,
+    val location: String?,
+)
+
+data class EventDetail(
+    val instance: EventInstance,
+    val description: String?,
+    val organizer: String?,
+    val attendees: List<Attendee>,
+    val rrule: String?,
+)
+
+data class Attendee(
+    val name: String,
+    val email: String?,
+    val status: AttendeeStatus,
+)
+
+enum class AttendeeStatus {
+    Accepted,
+    Declined,
+    Tentative,
+    NeedsAction,
+    Unknown,
+}
+
+enum class FailureReason {
+    PermissionRevoked,
+    NoCalendarsConfigured,
+    ProviderUnavailable,
+    EventNotFound,
+    Unknown,
+}
diff --git a/app/src/test/java/de/jeanlucmakiola/calendula/domain/ModelsTest.kt b/app/src/test/java/de/jeanlucmakiola/calendula/domain/ModelsTest.kt
new file mode 100644
index 0000000..2209173
--- /dev/null
+++ b/app/src/test/java/de/jeanlucmakiola/calendula/domain/ModelsTest.kt
@@ -0,0 +1,74 @@
+package de.jeanlucmakiola.calendula.domain
+
+import com.google.common.truth.Truth.assertThat
+import kotlin.time.Instant
+import org.junit.jupiter.api.Test
+
+class ModelsTest {
+
+    @Test
+    fun `CalendarSource is a data class with structural equality`() {
+        val a = CalendarSource(1L, "Work", "x@y", "com.google", 0xFF112233.toInt(), true)
+        val b = CalendarSource(1L, "Work", "x@y", "com.google", 0xFF112233.toInt(), true)
+        assertThat(a).isEqualTo(b)
+    }
+
+    @Test
+    fun `EventInstance is a data class with structural equality`() {
+        val start = Instant.fromEpochMilliseconds(0L)
+        val end = Instant.fromEpochMilliseconds(3_600_000L)
+        val a = EventInstance(10L, 1L, 1L, "Meet", start, end, false, 0xFF000000.toInt(), null)
+        val b = EventInstance(10L, 1L, 1L, "Meet", start, end, false, 0xFF000000.toInt(), null)
+        assertThat(a).isEqualTo(b)
+    }
+
+    @Test
+    fun `AttendeeStatus enum has all five variants`() {
+        assertThat(AttendeeStatus.values().toSet()).isEqualTo(
+            setOf(
+                AttendeeStatus.Accepted,
+                AttendeeStatus.Declined,
+                AttendeeStatus.Tentative,
+                AttendeeStatus.NeedsAction,
+                AttendeeStatus.Unknown,
+            )
+        )
+    }
+
+    @Test
+    fun `FailureReason enum has all five variants`() {
+        assertThat(FailureReason.values().toSet()).isEqualTo(
+            setOf(
+                FailureReason.PermissionRevoked,
+                FailureReason.NoCalendarsConfigured,
+                FailureReason.ProviderUnavailable,
+                FailureReason.EventNotFound,
+                FailureReason.Unknown,
+            )
+        )
+    }
+
+    @Test
+    fun `EventDetail composes EventInstance plus extras`() {
+        val instance = EventInstance(
+            instanceId = 10L,
+            eventId = 1L,
+            calendarId = 1L,
+            title = "Meet",
+            start = Instant.fromEpochMilliseconds(0L),
+            end = Instant.fromEpochMilliseconds(60_000L),
+            isAllDay = false,
+            color = 0xFFAABBCC.toInt(),
+            location = null,
+        )
+        val detail = EventDetail(
+            instance = instance,
+            description = "Brief description",
+            organizer = "x@y",
+            attendees = listOf(Attendee("Alice", "alice@x", AttendeeStatus.Accepted)),
+            rrule = "FREQ=WEEKLY",
+        )
+        assertThat(detail.instance.title).isEqualTo("Meet")
+        assertThat(detail.attendees).hasSize(1)
+    }
+}