Add WelcomeMessage plugin

src/index.ts

@@ -92,6 +92,7 @@ import { ZeppelinPlugin } from "./plugins/ZeppelinPlugin";
 import { customArgumentTypes } from "./customArgumentTypes";
 import { startUptimeCounter } from "./uptime";
 import { UsernameSaver } from "./plugins/UsernameSaver";
+import { WelcomeMessagePlugin } from "./plugins/WelcomeMessage";
 
 // Run latest database migrations
 logger.info("Running database migrations");
@@ -136,6 +137,7 @@ connect().then(async conn => {
       PingableRolesPlugin,
       SelfGrantableRolesPlugin,
       RemindersPlugin,
+      WelcomeMessagePlugin,
     ],
 
     globalPlugins: [BotControlPlugin, LogServerPlugin, UsernameSaver],

src/plugins/WelcomeMessage.ts

@@ -0,0 +1,54 @@
+import { ZeppelinPlugin } from "./ZeppelinPlugin";
+import { decorators as d, IPluginOptions } from "knub";
+import { Member, TextChannel } from "eris";
+import { renderTemplate } from "../templateFormatter";
+import { createChunkedMessage, stripObjectToScalars } from "../utils";
+
+interface IWelcomeMessageConfig {
+  send_dm: boolean;
+  send_to_channel: string;
+  message: string;
+}
+
+export class WelcomeMessagePlugin extends ZeppelinPlugin<IWelcomeMessageConfig> {
+  public static pluginName = "welcome_message";
+
+  protected getDefaultOptions(): IPluginOptions<IWelcomeMessageConfig> {
+    return {
+      config: {
+        send_dm: false,
+        send_to_channel: null,
+        message: null,
+      },
+    };
+  }
+
+  @d.event("guildMemberAdd")
+  async onGuildMemberAdd(_, member: Member) {
+    const config = this.getConfig();
+    if (!config.message) return;
+    if (!config.send_dm && !config.send_to_channel) return;
+
+    const formatted = await renderTemplate(config.message, {
+      member: stripObjectToScalars(member, ["user"]),
+    });
+
+    if (config.send_dm) {
+      const dmChannel = await member.user.getDMChannel();
+      if (!dmChannel) return;
+
+      try {
+        createChunkedMessage(dmChannel, formatted);
+      } catch (e) {} // tslint:disable-line
+    }
+
+    if (config.send_to_channel) {
+      const channel = this.guild.channels.get(config.send_to_channel);
+      if (!channel || !(channel instanceof TextChannel)) return;
+
+      try {
+        createChunkedMessage(channel, formatted);
+      } catch (e) {} // tslint:disable-line
+    }
+  }
+}