From 1371b0efdf7d1c4b025994c35902b3f692226c6b Mon Sep 17 00:00:00 2001
From: Matthew R <matthew@staff.libraryofcode.org>
Date: Mon, 23 Mar 2020 22:26:06 -0400
Subject: [PATCH] automatic hard enforcement for memory limits

---
 src/intervals/memory.ts | 73 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 src/intervals/memory.ts

diff --git a/src/intervals/memory.ts b/src/intervals/memory.ts
new file mode 100644
index 0000000..56013ed
--- /dev/null
+++ b/src/intervals/memory.ts
@@ -0,0 +1,73 @@
+/* eslint-disable no-await-in-loop */
+import { Client } from '..';
+import { RichEmbed } from '../class';
+
+const channelID = '691824484230889546';
+
+export const memoryLimits = {
+  TIER_1_SOFT: 250,
+  TIER_1_HARD: 300,
+  TIER_2_SOFT: 300,
+  TIER_2_HARD: 350,
+  TIER_3_SOFT: 450,
+  TIER_3_HARD: 500,
+};
+
+export default async function memory(client: Client) {
+  const accounts = await client.db.Account.find();
+  for (const acc of accounts) {
+    if (acc.root) return;
+    // memory in bytes
+    const mem = Number(await client.util.exec(`memory ${acc.username}`)) * 1000;
+    // memory in megabytes
+    const memoryConversion = mem / 1024 / 1024;
+    let userLimits: { soft: number, hard: number };
+    if (acc.tier === 1) {
+      userLimits = { soft: memoryLimits.TIER_1_SOFT, hard: memoryLimits.TIER_1_HARD };
+    } else if (acc.tier === 2) {
+      userLimits = { soft: memoryLimits.TIER_2_SOFT, hard: memoryLimits.TIER_2_HARD };
+    } else if (acc.tier === 3) {
+      userLimits = { soft: memoryLimits.TIER_3_SOFT, hard: memoryLimits.TIER_3_HARD };
+    }
+
+    /* if the user has exceeded their soft memory limit, which is the one described in the
+      resource limit guidelines, we'll inform staff.
+    */
+    if (acc.tier === 1 && memoryConversion >= userLimits.soft) {
+      const embed = new RichEmbed();
+      if (client.users.get(acc.userID)) embed.setThumbnail(client.users.get(acc.userID).avatarURL);
+      embed.addField('User', `${acc.username} | <@${acc.userID}> | ${acc.userID}`, true);
+      embed.addField('Tier', String(acc.tier), true);
+      embed.addField('Memory Usage', `${String(memoryConversion)} MB`, true);
+      embed.addField('Memory Limit', `${String(userLimits.soft)} MB`, true);
+      embed.setFooter(client.user.username, client.user.avatarURL);
+      embed.setTimestamp();
+
+      // if they exceed the hard limit, we'll kill all of their processes.
+      if (memoryConversion >= userLimits.hard) {
+        client.util.exec(`killall -9 -u ${acc.username}`);
+        embed.setTitle('Resource Enforcement Notification');
+        embed.setDescription('Someone has reached the (hard) resource limit for their tier on RAM. The system has automatically killed all of their processes.');
+        client.util.createModerationLog(acc.userID, client.guilds.get('446067825673633794').members.get(client.user.id), 1, '[AUTO] Exceeded resource limit for RAM.');
+        client.util.transport.sendMail({
+          to: acc.emailAddress,
+          from: 'Library of Code sp-us | Cloud Services <help@libraryofcode.org>',
+          subject: 'Your account has been warned',
+          html: `
+          <h1>Library of Code sp-us | Cloud Services</h1>
+          <p>Your account has received an official warning from a Moderator. Please get the underlying issue resolved to avoid <i>possible</i> moderative action.</p>
+          <p><strong>Reason:</strong> [AUTO] Exceeded resource limit for RAM.</p>
+          <p><strong>Moderator:</strong> ${client.user.username}</p>
+  
+          <b><i>Library of Code sp-us | Support Team</i></b>
+          `,
+        });
+      } else {
+        embed.setTitle('Resource Limit Notification');
+        embed.setDescription('Someone has reached the (soft) resource limit for their tier on RAM.');
+      }
+      // @ts-ignore
+      client.createMessage(channelID, { embed });
+    }
+  }
+}