Old properties for Update events

core/src/main/kotlin/entity/channel/thread/ThreadChannel.kt

@@ -108,7 +108,7 @@ public interface ThreadChannel : GuildMessageChannel, ThreadChannelBehavior {
 
 }
 
-internal fun ThreadChannel(data: ChannelData, kord: Kord, supplier: EntitySupplier): ThreadChannel {
+internal fun ThreadChannel(data: ChannelData, kord: Kord, supplier: EntitySupplier = kord.defaultSupplier): ThreadChannel {
     return object : ThreadChannel {
 
         override val data: ChannelData

core/src/main/kotlin/event/channel/ChannelDeleteEvent.kt

@@ -95,7 +95,7 @@ public class UnknownChannelDeleteEvent(
     override val shard: Int,
     public val coroutineScope: CoroutineScope = kordCoroutineScope(channel.kord)
 
-) : ChannelCreateEvent, CoroutineScope by coroutineScope {
+) : ChannelDeleteEvent, CoroutineScope by coroutineScope {
     override fun toString(): String {
         return "UnknownChannelDeleteEvent(channel=$channel, shard=$shard)"
     }

core/src/main/kotlin/event/channel/ChannelUpdateEvent.kt

@@ -9,89 +9,99 @@ import dev.kord.core.event.kordCoroutineScope
 import kotlinx.coroutines.CoroutineScope
 import kotlin.coroutines.CoroutineContext
 
+
 public interface ChannelUpdateEvent : Event {
     public val channel: Channel
+    public val old: Channel?
     override val kord: Kord
         get() = channel.kord
 }
 
 public class CategoryUpdateEvent(
     override val channel: Category,
+    override val old: Category?,
     override val shard: Int,
     public val coroutineScope: CoroutineScope = kordCoroutineScope(channel.kord)
 ) : ChannelUpdateEvent, CoroutineScope by coroutineScope {
     override fun toString(): String {
-        return "CategoryUpdateEvent(channel=$channel, shard=$shard)"
+        return "CategoryUpdateEvent(channel=$channel, old=$old, shard=$shard)"
     }
 }
 
 public class DMChannelUpdateEvent(
     override val channel: DmChannel,
+    override val old: DmChannel?,
     override val shard: Int,
     public val coroutineScope: CoroutineScope = kordCoroutineScope(channel.kord)
 ) : ChannelUpdateEvent, CoroutineScope by coroutineScope {
     override fun toString(): String {
-        return "DMChannelUpdateEvent(channel=$channel, shard=$shard)"
+        return "DMChannelUpdateEvent(channel=$channel, old=$old, shard=$shard)"
     }
 }
 
 public class NewsChannelUpdateEvent(
     override val channel: NewsChannel,
+    override val old: NewsChannel?,
     override val shard: Int,
     public val coroutineScope: CoroutineScope = kordCoroutineScope(channel.kord)
 ) : ChannelUpdateEvent, CoroutineScope by coroutineScope {
     override fun toString(): String {
-        return "NewsChannelUpdateEvent(channel=$channel, shard=$shard)"
+        return "NewsChannelUpdateEvent(channel=$channel, old=$old, shard=$shard)"
     }
 }
 
 public class StoreChannelUpdateEvent(
     override val channel: StoreChannel,
+    override val old: StoreChannel?,
     override val shard: Int,
     public val coroutineScope: CoroutineScope = kordCoroutineScope(channel.kord)
 ) : ChannelUpdateEvent, CoroutineScope by coroutineScope {
     override fun toString(): String {
-        return "StoreChannelUpdateEvent(channel=$channel, shard=$shard)"
+        return "StoreChannelUpdateEvent(channel=$channel, old=$old, shard=$shard)"
     }
 }
 
 public class TextChannelUpdateEvent(
     override val channel: TextChannel,
+    override val old: TextChannel?,
     override val shard: Int,
     public val coroutineScope: CoroutineScope = kordCoroutineScope(channel.kord)
 ) : ChannelUpdateEvent, CoroutineScope by coroutineScope {
     override fun toString(): String {
-        return "TextChannelUpdateEvent(channel=$channel, shard=$shard)"
+        return "TextChannelUpdateEvent(channel=$channel, old=$old, shard=$shard)"
     }
 }
 
 public class VoiceChannelUpdateEvent(
     override val channel: VoiceChannel,
+    override val old: VoiceChannel?,
     override val shard: Int,
     public val coroutineScope: CoroutineScope = kordCoroutineScope(channel.kord)
 ) : ChannelUpdateEvent, CoroutineScope by coroutineScope{
     override fun toString(): String {
-        return "VoiceChannelUpdateEvent(channel=$channel, shard=$shard)"
+        return "VoiceChannelUpdateEvent(channel=$channel, old=$old, shard=$shard)"
     }
 }
 
 
 public class StageChannelUpdateEvent(
     override val channel: StageChannel,
+    override val old: StageChannel?,
     override val shard: Int,
     public val coroutineScope: CoroutineScope = kordCoroutineScope(channel.kord)
 ) : ChannelUpdateEvent, CoroutineScope by coroutineScope {
     override fun toString(): String {
-        return "StageChannelUpdateEvent(channel=$channel, shard=$shard)"
+        return "StageChannelUpdateEvent(channel=$channel, old=$old, shard=$shard)"
     }
 }
 
 public class UnknownChannelUpdateEvent(
     override val channel: Channel,
+    override val old: Channel?,
     override val shard: Int,
     public val coroutineScope: CoroutineScope = kordCoroutineScope(channel.kord)
 ) : ChannelUpdateEvent, CoroutineScope by coroutineScope {
     override fun toString(): String {
-        return "UnknownChannelUpdateEvent(channel=$channel, shard=$shard)"
+        return "UnknownChannelUpdateEvent(channel=$channel, old=$old, shard=$shard)"
     }
 }

core/src/main/kotlin/event/channel/thread/ThreadUpdateEvent.kt

@@ -6,7 +6,6 @@ import dev.kord.core.entity.channel.thread.ThreadChannel
 import dev.kord.core.event.channel.ChannelUpdateEvent
 import dev.kord.core.event.kordCoroutineScope
 import kotlinx.coroutines.CoroutineScope
-import kotlin.coroutines.CoroutineContext
 
 public sealed interface ThreadUpdateEvent : ChannelUpdateEvent {
     override val channel: ThreadChannel
@@ -15,33 +14,36 @@ public sealed interface ThreadUpdateEvent : ChannelUpdateEvent {
 
 public class TextChannelThreadUpdateEvent(
     override val channel: TextChannelThread,
+    override val old: TextChannelThread?,
     override val shard: Int,
     public val coroutineScope: CoroutineScope = kordCoroutineScope(channel.kord)
 ) :
     ThreadUpdateEvent, CoroutineScope by coroutineScope {
     override fun toString(): String {
-        return "TextThreadChannelUpdateEvent(channel=$channel, shard=$shard)"
+        return "TextThreadChannelUpdateEvent(channel=$channel, old=$old, shard=$shard)"
     }
 }
 
 
 public class NewsChannelThreadUpdateEvent(
     override val channel: NewsChannelThread,
+    override val old: NewsChannelThread?,
     override val shard: Int,
     public val coroutineScope: CoroutineScope = kordCoroutineScope(channel.kord)
 ) : ThreadUpdateEvent, CoroutineScope by coroutineScope {
     override fun toString(): String {
-        return "NewsThreadChannelUpdateEvent(channel=$channel, shard=$shard)"
+        return "NewsThreadChannelUpdateEvent(channel=$channel, old=$old, shard=$shard)"
     }
 }
 
 
 public class UnknownChannelThreadUpdateEvent(
     override val channel: ThreadChannel,
+    override val old: ThreadChannel?,
     override val shard: Int,
     public val coroutineScope: CoroutineScope = kordCoroutineScope(channel.kord)
 ) : ThreadUpdateEvent, CoroutineScope by coroutineScope {
     override fun toString(): String {
-        return "UnknownChannelThreadUpdateEvent(channel=$channel, shard=$shard)"
+        return "UnknownChannelThreadUpdateEvent(channel=$channel, old=$old, shard=$shard)"
     }
 }

core/src/main/kotlin/event/guild/EmojisUpdateEvent.kt

@@ -16,6 +16,7 @@ import kotlin.coroutines.CoroutineContext
 public class EmojisUpdateEvent(
     public val guildId: Snowflake,
     public val emojis: Set<GuildEmoji>,
+    public val old: Set<GuildEmoji>?,
     override val kord: Kord,
     override val shard: Int,
     override val supplier: EntitySupplier = kord.defaultSupplier,
@@ -29,9 +30,9 @@ public class EmojisUpdateEvent(
     public suspend fun getGuildOrNull(): Guild? = supplier.getGuildOrNull(guildId)
 
     override fun withStrategy(strategy: EntitySupplyStrategy<*>): EmojisUpdateEvent =
-        EmojisUpdateEvent(guildId, emojis, kord, shard, strategy.supply(kord))
+        EmojisUpdateEvent(guildId, emojis, old, kord, shard, strategy.supply(kord))
 
     override fun toString(): String {
-        return "EmojisUpdateEvent(guildId=$guildId, emojis=$emojis, kord=$kord, shard=$shard, supplier=$supplier)"
+        return "EmojisUpdateEvent(guildId=$guildId, emojis=$emojis, old=$old, kord=$kord, shard=$shard, supplier=$supplier)"
     }
 }

core/src/main/kotlin/event/guild/MemberLeaveEvent.kt

@@ -4,6 +4,7 @@ import dev.kord.common.entity.Snowflake
 import dev.kord.core.Kord
 import dev.kord.core.behavior.GuildBehavior
 import dev.kord.core.entity.Guild
+import dev.kord.core.entity.Member
 import dev.kord.core.entity.User
 import dev.kord.core.event.Event
 import dev.kord.core.event.kordCoroutineScope
@@ -12,6 +13,7 @@ import kotlin.coroutines.CoroutineContext
 
 public class MemberLeaveEvent(
     public val user: User,
+    public val old: Member?,
     public val guildId: Snowflake,
     override val shard: Int,
     public val coroutineScope: CoroutineScope = kordCoroutineScope(user.kord)
@@ -26,7 +28,7 @@ public class MemberLeaveEvent(
     public suspend fun getGuildOrNull(): Guild? = guild.asGuildOrNull()
 
     override fun toString(): String {
-        return "MemberLeaveEvent(user=$user, guildId=$guildId, shard=$shard)"
+        return "MemberLeaveEvent(user=$user, old=$old, guildId=$guildId, shard=$shard)"
     }
 
 }

core/src/main/kotlin/event/role/RoleUpdateEvent.kt

@@ -15,6 +15,7 @@ import kotlin.coroutines.CoroutineContext
 
 public class RoleUpdateEvent(
     public val role: Role,
+    public val old: Role?,
     override val shard: Int,
     override val supplier: EntitySupplier = role.kord.defaultSupplier,
     public val coroutineScope: CoroutineScope = kordCoroutineScope(role.kord)
@@ -31,9 +32,9 @@ public class RoleUpdateEvent(
     public suspend fun getGuildOrNull(): Guild? = supplier.getGuildOrNull(guildId)
 
     override fun withStrategy(strategy: EntitySupplyStrategy<*>): RoleUpdateEvent =
-        RoleUpdateEvent(role, shard, strategy.supply(kord))
+        RoleUpdateEvent(role, old, shard, strategy.supply(kord))
 
     override fun toString(): String {
-        return "RoleUpdateEvent(role=$role, shard=$shard, supplier=$supplier)"
+        return "RoleUpdateEvent(role=$role, old=$old, shard=$shard, supplier=$supplier)"
     }
 }

core/src/main/kotlin/gateway/handler/ChannelEventHandler.kt

@@ -15,7 +15,6 @@ import dev.kord.core.event.channel.data.ChannelPinsUpdateEventData
 import dev.kord.core.event.channel.data.TypingStartEventData
 import dev.kord.gateway.*
 import kotlinx.coroutines.CoroutineScope
-import kotlin.coroutines.CoroutineContext
 import dev.kord.core.event.Event as CoreEvent
 
 @Suppress("EXPERIMENTAL_API_USAGE")
@@ -59,18 +58,19 @@ internal class ChannelEventHandler(
 
     private suspend fun handle(event: ChannelUpdate, shard: Int, kord: Kord, coroutineScope: CoroutineScope): CoreEvent? {
         val data = ChannelData.from(event.channel)
+        val oldData = cache.query<ChannelData> { idEq(ChannelData::id, data.id) }.singleOrNull()
         cache.put(data)
-
+        val old = oldData?.let { Channel.from(it, kord) }
         val coreEvent = when (val channel = Channel.from(data, kord)) {
-            is NewsChannel -> NewsChannelUpdateEvent(channel, shard, coroutineScope)
-            is StoreChannel -> StoreChannelUpdateEvent(channel, shard, coroutineScope)
-            is DmChannel -> DMChannelUpdateEvent(channel, shard, coroutineScope)
-            is TextChannel -> TextChannelUpdateEvent(channel, shard, coroutineScope)
-            is StageChannel -> StageChannelUpdateEvent(channel, shard, coroutineScope)
-            is VoiceChannel -> VoiceChannelUpdateEvent(channel, shard, coroutineScope)
-            is Category -> CategoryUpdateEvent(channel, shard, coroutineScope)
+            is NewsChannel -> NewsChannelUpdateEvent(channel, old as? NewsChannel, shard, coroutineScope)
+            is StoreChannel -> StoreChannelUpdateEvent(channel, old as? StoreChannel, shard, coroutineScope)
+            is DmChannel -> DMChannelUpdateEvent(channel, old as? DmChannel, shard, coroutineScope)
+            is TextChannel -> TextChannelUpdateEvent(channel, old as? TextChannel, shard, coroutineScope)
+            is StageChannel -> StageChannelUpdateEvent(channel, old as? StageChannel, shard, coroutineScope)
+            is VoiceChannel -> VoiceChannelUpdateEvent(channel, old as? VoiceChannel, shard, coroutineScope)
+            is Category -> CategoryUpdateEvent(channel, old as? Category, shard, coroutineScope)
             is ThreadChannel -> return null
-            else -> UnknownChannelUpdateEvent(channel, shard, coroutineScope)
+            else -> UnknownChannelUpdateEvent(channel, old, shard, coroutineScope)
 
         }
 

core/src/main/kotlin/gateway/handler/GuildEventHandler.kt

@@ -144,7 +144,11 @@ internal class GuildEventHandler(
         coroutineScope: CoroutineScope
     ): EmojisUpdateEvent =
         with(event.emoji) {
+
             val data = emojis.map { EmojiData.from(guildId, it.id!!, it) }
+            val old = cache.query<EmojiData> { idEq(EmojiData::guildId, guildId) }.asFlow().map {
+                GuildEmoji(it, kord)
+            }.toSet()
             cache.putAll(data)
 
             val emojis = data.map { GuildEmoji(it, kord) }
@@ -153,7 +157,7 @@ internal class GuildEventHandler(
                 it.copy(emojis = emojis.map { emoji -> emoji.id })
             }
 
-            return EmojisUpdateEvent(guildId, emojis.toSet(), kord, shard, coroutineScope = coroutineScope)
+            return EmojisUpdateEvent(guildId, emojis.toSet(), old, kord, shard, coroutineScope = coroutineScope)
         }
 
 
@@ -191,10 +195,18 @@ internal class GuildEventHandler(
     ): MemberLeaveEvent =
         with(event.member) {
             val userData = UserData.from(user)
+
+            val oldData = cache.query<MemberData> {
+                idEq(MemberData::userId, userData.id)
+                idEq(MemberData::guildId, guildId)
+            }.singleOrNull()
+
             cache.query<UserData> { idEq(UserData::id, userData.id) }.remove()
+
             val user = User(userData, kord)
+            val old = oldData?.let { Member(it, userData, kord) }
 
-            return MemberLeaveEvent(user, guildId, shard, coroutineScope = coroutineScope)
+            return MemberLeaveEvent(user, old, guildId, shard, coroutineScope = coroutineScope)
         }
 
     private suspend fun handle(
@@ -238,9 +250,16 @@ internal class GuildEventHandler(
         coroutineScope: CoroutineScope
     ): RoleUpdateEvent {
         val data = RoleData.from(event.role)
+
+        val oldData = cache.query<RoleData> {
+            idEq(RoleData::id, data.id)
+            idEq(RoleData::guildId, data.guildId) // TODO("Is this worth keeping?")
+        }.singleOrNull()
+
+        val old = oldData?.let { Role(it, kord) }
         cache.put(data)
 
-        return RoleUpdateEvent(Role(data, kord), shard, coroutineScope = coroutineScope)
+        return RoleUpdateEvent(Role(data, kord), old, shard, coroutineScope = coroutineScope)
     }
 
     private suspend fun handle(

core/src/main/kotlin/gateway/handler/ThreadEventHandler.kt

@@ -50,12 +50,18 @@ public class ThreadEventHandler(
 
     public suspend fun handle(event: ThreadUpdate, shard: Int, kord: Kord, coroutineScope: CoroutineScope): CoreEvent? {
         val channelData = event.channel.toData()
+        val oldData = cache.query<ChannelData> {
+            idEq(ChannelData::id, event.channel.id)
+            idEq(ChannelData::guildId, event.channel.guildId.value)
+        }.singleOrNull()
         cache.put(channelData)
 
+        val old = oldData?.let { ThreadChannel(it, kord) }
+
         val coreEvent = when (val channel = Channel.from(channelData, kord)) {
-            is NewsChannelThread -> NewsChannelThreadUpdateEvent(channel, shard, coroutineScope)
-            is TextChannelThread -> TextChannelThreadUpdateEvent(channel, shard, coroutineScope)
-            is ThreadChannel -> UnknownChannelThreadUpdateEvent(channel, shard, coroutineScope)
+            is NewsChannelThread -> NewsChannelThreadUpdateEvent(channel, old as? NewsChannelThread, shard, coroutineScope)
+            is TextChannelThread -> TextChannelThreadUpdateEvent(channel, old as? TextChannelThread, shard, coroutineScope)
+            is ThreadChannel -> UnknownChannelThreadUpdateEvent(channel,old, shard, coroutineScope)
             else -> return null
         }