From f2a25f8af4a38f79c2b6072f1591d42a7268eb97 Mon Sep 17 00:00:00 2001
From: janderedev <me@janderedev.xyz>
Date: Tue, 26 Apr 2022 14:34:33 +0200
Subject: [PATCH] e n h a n c e /debug command

---
 bot/src/bot/commands/debug.ts | 74 ++++++++++++++++++++++++++++++++---
 1 file changed, 68 insertions(+), 6 deletions(-)

diff --git a/bot/src/bot/commands/debug.ts b/bot/src/bot/commands/debug.ts
index 80b981d..fb90185 100644
--- a/bot/src/bot/commands/debug.ts
+++ b/bot/src/bot/commands/debug.ts
@@ -1,17 +1,79 @@
+import { decodeTime } from "ulid";
 import CommandCategory from "../../struct/commands/CommandCategory";
 import SimpleCommand from "../../struct/commands/SimpleCommand";
 import MessageCommandContext from "../../struct/MessageCommandContext";
+import { ULID_REGEX } from "../util";
 
 export default {
     name: 'debug',
     aliases: null,
     description: 'Gives info helpful for development and debugging',
+    syntax: '/debug [ULID|Discord ID|(empty)]',
     category: CommandCategory.Misc,
-    run: (message: MessageCommandContext, args: string[]) => {
-        message.reply(`Server ID: ${message.channel?.server_id || 'None'}\n`
-                    + `Server context: ${message.serverContext._id} `
-                        + `(${message.serverContext._id == message.channel?.server_id ? 'This server' : message.serverContext.name})\n`
-                    + `Channel ID: ${message.channel_id}\n`
-                    + `User ID: ${message.author_id}`);
+    run: async (message: MessageCommandContext, args: string[]) => {
+        if (ULID_REGEX.test(args[0])) {
+            const ts = decodeTime(args[0]);
+            const tsSmall = Math.round(ts / 1000);
+            await message.reply(
+                `ULID: \`${args[0]}\`\n` +
+                `TS: \`${ts}\` (<t:${tsSmall}:F> / <t:${tsSmall}:R>)`,
+                false
+            );
+        } else if (validateSnowflake(args[0])) {
+            const date = convertSnowflakeToDate(args[0]);
+            const ts = date.getTime(),
+                  tsSmall = Math.round(ts / 1000);
+
+            await message.reply(
+                `Discord Snowflake: \`${args[0]}\`\n` +
+                `TS: \`${ts}\` (<t:${tsSmall}:F> / <t:${tsSmall}:R>)`,
+                false
+            );
+        } else {
+            await message.reply(
+                `Server ID: ${message.channel?.server_id || 'None'}\n`
+                + `Server context: ${message.serverContext._id} `
+                    + `(${message.serverContext._id == message.channel?.server_id ? 'This server' : message.serverContext.name})\n`
+                + `Channel ID: ${message.channel_id}\n`
+                + `User ID: ${message.author_id}`,
+                false
+            );
+        }
     }
 } as SimpleCommand;
+
+
+/* The below is yoinked from https://github.com/vegeta897/snow-stamp/blob/main/src/convert.js */
+
+const DISCORD_EPOCH = 1420070400000;
+
+// Converts a snowflake ID string into a JS Date object using the provided epoch (in ms), or Discord's epoch if not provided
+function convertSnowflakeToDate(snowflake: string|bigint, epoch = DISCORD_EPOCH) {
+	// Convert snowflake to BigInt to extract timestamp bits
+	// https://discord.com/developers/docs/reference#snowflakes
+	const milliseconds = BigInt(snowflake) >> 22n;
+	return new Date(Number(milliseconds) + epoch);
+}
+
+// Validates a snowflake ID string and returns a JS Date object if valid
+function validateSnowflake(snowflake: string, epoch?: number) {
+    if (isNaN(parseInt(snowflake))) return false;
+
+	if (parseInt(snowflake) < 4194304) {
+		//throw new Error(
+		//	"That doesn't look like a snowflake. Snowflakes are much larger numbers."
+		//)
+        return false;
+	}
+
+	const timestamp = convertSnowflakeToDate(snowflake, epoch);
+
+	if (Number.isNaN(timestamp.getTime())) {
+		//throw new Error(
+		//	"That doesn't look like a snowflake. Snowflakes have fewer digits."
+		//)
+        return false;
+	}
+
+	return timestamp;
+}