Only send welcome messages once per user, until plugin reload

backend/src/plugins/WelcomeMessage/WelcomeMessagePlugin.ts

@@ -30,5 +30,6 @@ export const WelcomeMessagePlugin = zeppelinPlugin<WelcomeMessagePluginType>()("
     const { state, guild } = pluginData;
 
     state.logs = new GuildLogs(guild.id);
+    state.sentWelcomeMessages = new Set();
   },
 });

backend/src/plugins/WelcomeMessage/events/SendWelcomeMessageEvt.ts

@@ -16,6 +16,13 @@ export const SendWelcomeMessageEvt = welcomeEvent({
     if (!config.message) return;
     if (!config.send_dm && !config.send_to_channel) return;
 
+    // Only send welcome messages once per user (even if they rejoin) until the plugin is reloaded
+    if (pluginData.state.sentWelcomeMessages.has(member.id)) {
+      return;
+    }
+
+    pluginData.state.sentWelcomeMessages.add(member.id);
+
     const formatted = await renderTemplate(config.message, {
       member: stripObjectToScalars(member, ["user"]),
     });

backend/src/plugins/WelcomeMessage/types.ts

@@ -14,6 +14,7 @@ export interface WelcomeMessagePluginType extends BasePluginType {
   config: TConfigSchema;
   state: {
     logs: GuildLogs;
+    sentWelcomeMessages: Set<string>;
   };
 }