feat: check if user has a code already

Author: TobiTenno

src/commands/Promocodes/ClaimPromocode.js

@@ -39,12 +39,16 @@ class ClaimPromocode extends Command {
       this.messageManager.reply(message, 'Your password is invalid, or you didn\'t provide one and the pool is not open.');
       return this.messageManager.statuses.FAILURE;
     }
+    if (this.settings.hasCodeInPool(message.author, pool)) {
+      this.messageManager.reply(message, `<@${message.author.id}> already has a code from `);
+      return this.messageManager.statuses.FAILURE;
+    }
     if (grantedTo === null) {
       await this.settings.grantCode(code, message.author.id, message.author.id, platform);
       this.messageManager.reply(message, `Code claimed by <@${message.author.id}>`);
       return this.messageManager.statuses.SUCCESS;
     }
-    return this.messageManager.statuses.SUCCESS;
+    return this.messageManager.statuses.FAILURE;
   }
 }
 

src/settings/DatabaseQueries/PromocodeQueries.js

@@ -53,6 +53,17 @@ class PromocodeQueries {
     return res[0].pool_restricted;
   }
 
+  async hasCodeInPool(member, pool) {
+    const query = SQL`SELECT count(cm.code) as count
+      FROM code_pool_member cm
+      WHERE granted_to = ${member.id} and pool_id = ${pool};`;
+    const res = await this.db.query(query);
+    if (res[0].length === 0) {
+      return undefined;
+    }
+    return res[0].count > 0;
+  }
+
   async isPoolPublic(id) {
     const query = SQL`SELECT pool_public FROM code_pool WHERE pool_id = ${id};`;
     const res = await this.db.query(query);