initial commit

events/handle-react-image.ts

@@ -0,0 +1,40 @@
+import discord from 'discord.js';
+import {HydratedDocument} from 'mongoose';
+
+import {logger} from '../logger';
+import {config} from '../config';
+import {reactPreprocess} from '../functions/react-preprocess';
+import {Alias, aliasModel} from '../models/Alias';
+import {Guild, guildModel} from '../models/Guild';
+import {Image, imageModel} from '../models/Image';
+
+export async function handleReactImage(message: discord.Message): Promise<void>{
+  try{
+    if(!message.guild || !message.guild.id || !message.content) return;
+    const guild: HydratedDocument<Guild> | null = 
+      await guildModel.findOne({id: message.guild.id});
+    if(!guild) return; // not in guild
+    const alias: HydratedDocument<Alias> | null = 
+      await aliasModel.findOne(
+        {guild: guild, text: reactPreprocess(message.content)}
+      );
+    if(!alias) return; // alias not exist
+    if(!alias.images.length) return; // alias not linked
+
+    const chosenImage: Image = 
+      alias.images[Math.floor(Math.random() * alias.images.length)];
+    const image: HydratedDocument<Image> | null = 
+      await imageModel.findById(chosenImage._id);
+    if(!image) 
+      throw Error('image not exist');
+
+    await message.channel.send({
+      content: `${config.httpServer.external.url}/${image._id}${image.extension}`
+    });
+  }catch(err: unknown){
+    let errMsg;
+    if(err instanceof Error) errMsg = err.message;
+    else errMsg = String(errMsg);
+    logger.error(`While executing "handleReactImage", ${errMsg}`);
+  }
+}