From b987ec97550a27485a92a76d57320b2c3b3dade4 Mon Sep 17 00:00:00 2001
From: Cynthia Foxwell <lumodder@gmail.com>
Date: Fri, 23 Jul 2021 16:44:09 -0600
Subject: [PATCH] bot: add exec

---
 src/modules/bot.js | 82 +++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 81 insertions(+), 1 deletion(-)

diff --git a/src/modules/bot.js b/src/modules/bot.js
index d7d64e7..1e0a778 100644
--- a/src/modules/bot.js
+++ b/src/modules/bot.js
@@ -2,10 +2,48 @@ const Command = require("../lib/command.js");
 const CATEGORY = "bot";
 
 const logger = require("npmlog");
+const child_process = require("child_process");
 const {inspect} = require("util");
+const {resolve} = require("path");
 
 const {hastebin} = require("../lib/utils.js");
 
+function spawn(args) {
+  const shell =
+    process.env.SHELL || (process.platform == "win32" ? "powershell" : "bash");
+
+  const newArgs = [];
+  if (shell.match(/powershell/i) && process.platform == "win32") {
+    newArgs.push("-NoLogo", "-Command");
+  } else {
+    newArgs.push("-c");
+  }
+  newArgs.push(args);
+
+  const proc = child_process.spawn(shell, newArgs, {
+    cwd: resolve(__dirname, "..", ".."),
+  });
+  return {
+    pid: proc.pid,
+    stdout: {
+      on: (event, handler) =>
+        proc.stdout.on(event, (data) => {
+          handler(data.toString("utf8"));
+        }),
+    },
+    stderr: {
+      on: (event, handler) =>
+        proc.stderr.on(event, (data) => {
+          handler(data.toString("utf8"));
+        }),
+    },
+    on: (event, handler) =>
+      proc.on(event, (data) => {
+        handler(data.toString("utf8"));
+      }),
+  };
+}
+
 const reload = new Command("reload");
 reload.ownerOnly = true;
 reload.category = CATEGORY;
@@ -70,7 +108,7 @@ _eval.callback = async function (msg, line) {
     return ":warning: Output (errored):\n```js\n" + out + "\n```";
   } else {
     if (out.toString().length > 1980) {
-      const code = hastebin(out.toString());
+      const code = await hastebin(out.toString());
       return `\u2705 Output too long to send in a message: ${hf.config.haste_provider}/${code}`;
     } else {
       return "\u2705 Output:\n```js\n" + out + "\n```";
@@ -78,3 +116,45 @@ _eval.callback = async function (msg, line) {
   }
 };
 hf.registerCommand(_eval);
+
+const exec = new Command("exec");
+exec.elevatedOnly = true;
+exec.category = CATEGORY;
+exec.helpText = "Executes a command";
+exec.callback = async function (msg, line) {
+  const proc = spawn(line);
+  let out = `Spawned ${proc.pid}: \`${line}'`;
+  proc.stdout.on("data", (data) => {
+    out += data + "\n";
+  });
+  proc.stderr.on("data", (data) => {
+    out += data + "\n";
+  });
+
+  proc.on("close", async (code) => {
+    out += `====\nExited with ${code}`;
+    if (out.length > 1980) {
+      const code = await hastebin(out);
+      msg.channel.createMessage({
+        content: `Output too long to send in a message: ${hf.config.haste_provider}/${code}`,
+        allowedMentions: {
+          repliedUser: false,
+        },
+        messageReference: {
+          messageID: msg.id,
+        },
+      });
+    } else {
+      msg.channel.createMessage({
+        content: `\`\`\`\n${out}\`\`\``,
+        allowedMentions: {
+          repliedUser: false,
+        },
+        messageReference: {
+          messageID: msg.id,
+        },
+      });
+    }
+  });
+};
+hf.registerCommand(exec);