From 5e4654ee07b5408a2f8dbb7f52693239dacc203e Mon Sep 17 00:00:00 2001
From: Schuyler Cebulskie <Gawdl3y@gawdl3y.com>
Date: Sat, 11 May 2019 14:58:46 -0400
Subject: [PATCH] Backport news/store channels

---
 src/client/actions/ChannelUpdate.js | 45 +++++++++++++++++++++++++++--
 src/index.js                        |  2 ++
 src/structures/Channel.js           |  2 ++
 src/structures/NewsChannel.js       | 24 +++++++++++++++
 src/structures/StoreChannel.js      | 25 ++++++++++++++++
 src/util/Constants.js               |  2 ++
 6 files changed, 98 insertions(+), 2 deletions(-)
 create mode 100644 src/structures/NewsChannel.js
 create mode 100644 src/structures/StoreChannel.js

diff --git a/src/client/actions/ChannelUpdate.js b/src/client/actions/ChannelUpdate.js
index 43158b94c..4c94f9c02 100644
--- a/src/client/actions/ChannelUpdate.js
+++ b/src/client/actions/ChannelUpdate.js
@@ -1,15 +1,56 @@
 const Action = require('./Action');
+const Channel = require('../../structures/Channel');
+const TextChannel = require('../../structures/TextChannel');
+const VoiceChannel = require('../../structures/VoiceChannel');
+const CategoryChannel = require('../../structures/CategoryChannel');
+const NewsChannel = require('../../structures/NewsChannel');
+const StoreChannel = require('../../structures/StoreChannel');
 const Constants = require('../../util/Constants');
+const ChannelTypes = Constants.ChannelTypes;
 const Util = require('../../util/Util');
 
 class ChannelUpdateAction extends Action {
   handle(data) {
     const client = this.client;
 
-    const channel = client.channels.get(data.id);
+    let channel = client.channels.get(data.id);
     if (channel) {
       const oldChannel = Util.cloneObject(channel);
-      channel.setup(data);
+
+      // If the channel is changing types, we need to follow a different process
+      if (ChannelTypes[channel.type.toUpperCase()] !== data.type) {
+        // Determine which channel class we're changing to
+        let channelClass;
+        switch (data.type) {
+          case ChannelTypes.TEXT:
+            channelClass = TextChannel;
+            break;
+          case ChannelTypes.VOICE:
+            channelClass = VoiceChannel;
+            break;
+          case ChannelTypes.CATEGORY:
+            channelClass = CategoryChannel;
+            break;
+          case ChannelTypes.NEWS:
+            channelClass = NewsChannel;
+            break;
+          case ChannelTypes.STORE:
+            channelClass = StoreChannel;
+            break;
+        }
+
+        // Create the new channel instance and copy over cached data
+        const newChannel = new channelClass(channel.guild, data);
+        if (channel.messages && newChannel.messages) {
+          for (const [id, message] of channel.messages) newChannel.messages.set(id, message);
+        }
+
+        channel = newChannel;
+        this.client.channels.set(channel.id, channel);
+      } else {
+        channel.setup(data);
+      }
+
       client.emit(Constants.Events.CHANNEL_UPDATE, oldChannel, channel);
       return {
         old: oldChannel,
diff --git a/src/index.js b/src/index.js
index da33d0dbc..4624694ad 100644
--- a/src/index.js
+++ b/src/index.js
@@ -47,6 +47,7 @@ module.exports = {
   MessageEmbed: require('./structures/MessageEmbed'),
   MessageMentions: require('./structures/MessageMentions'),
   MessageReaction: require('./structures/MessageReaction'),
+  NewsChannel: require('./structures/NewsChannel'),
   OAuth2Application: require('./structures/OAuth2Application'),
   ClientOAuth2Application: require('./structures/OAuth2Application'),
   PartialGuild: require('./structures/PartialGuild'),
@@ -57,6 +58,7 @@ module.exports = {
   ReactionCollector: require('./structures/ReactionCollector'),
   RichEmbed: require('./structures/RichEmbed'),
   Role: require('./structures/Role'),
+  StoreChannel: require('./structures/StoreChannel'),
   TextChannel: require('./structures/TextChannel'),
   User: require('./structures/User'),
   VoiceChannel: require('./structures/VoiceChannel'),
diff --git a/src/structures/Channel.js b/src/structures/Channel.js
index e5263ccc7..732945d7f 100644
--- a/src/structures/Channel.js
+++ b/src/structures/Channel.js
@@ -20,6 +20,8 @@ class Channel {
      * * `text` - a guild text channel
      * * `voice` - a guild voice channel
      * * `category` - a guild category channel
+     * * `news` - a guild news channel
+     * * `store` - a guild store channel
      * @type {string}
      */
     this.type = null;
diff --git a/src/structures/NewsChannel.js b/src/structures/NewsChannel.js
new file mode 100644
index 000000000..bcbfbf3a8
--- /dev/null
+++ b/src/structures/NewsChannel.js
@@ -0,0 +1,24 @@
+const TextChannel = require('./TextChannel');
+
+/**
+ * Represents a guild news channel on Discord.
+ * @extends {TextChannel}
+ */
+class NewsChannel extends TextChannel {
+  constructor(guild, data) {
+    super(guild, data);
+    this.type = 'news';
+  }
+
+  setup(data) {
+    super.setup(data);
+
+    /**
+     * The ratelimit per user for this channel (always 0)
+     * @type {number}
+     */
+    this.rateLimitPerUser = 0;
+  }
+}
+
+module.exports = NewsChannel;
diff --git a/src/structures/StoreChannel.js b/src/structures/StoreChannel.js
new file mode 100644
index 000000000..8985c0f78
--- /dev/null
+++ b/src/structures/StoreChannel.js
@@ -0,0 +1,25 @@
+const GuildChannel = require('./GuildChannel');
+
+/**
+ * Represents a guild store channel on Discord.
+ * @extends {GuildChannel}
+ */
+class StoreChannel extends GuildChannel {
+  constructor(guild, data) {
+    super(guild, data);
+    this.type = 'store';
+  }
+
+  setup(data) {
+    super.setup(data);
+
+    /**
+     * If the guild considers this channel NSFW
+     * @type {boolean}
+     * @readonly
+     */
+    this.nsfw = data.nsfw;
+  }
+}
+
+module.exports = StoreChannel;
diff --git a/src/util/Constants.js b/src/util/Constants.js
index 7a8e13443..9110c42dc 100644
--- a/src/util/Constants.js
+++ b/src/util/Constants.js
@@ -282,6 +282,8 @@ exports.ChannelTypes = {
   VOICE: 2,
   GROUP_DM: 3,
   CATEGORY: 4,
+  NEWS: 5,
+  STORE: 6,
 };
 
 exports.OPCodes = {