From 10cdd5be6871679f1094105a45308d02e6d73658 Mon Sep 17 00:00:00 2001
From: Starbeamrainbowlabs <sbrl@starbeamrainbowlabs.com>
Date: Sun, 9 Jan 2022 15:07:33 +0000
Subject: [PATCH] Add namespaced logging system, but it isn't actually used yet

---
 src/lib/crypto/hash_numeric.mjs | 16 ++++++++
 src/lib/io/Log.mjs              | 71 +++++++++++++++++++++++++++++++++
 src/lib/io/NamespacedLog.mjs    | 36 +++++++++++++++++
 3 files changed, 123 insertions(+)
 create mode 100644 src/lib/crypto/hash_numeric.mjs
 create mode 100644 src/lib/io/Log.mjs
 create mode 100644 src/lib/io/NamespacedLog.mjs

diff --git a/src/lib/crypto/hash_numeric.mjs b/src/lib/crypto/hash_numeric.mjs
new file mode 100644
index 0000000..0cf9a0f
--- /dev/null
+++ b/src/lib/crypto/hash_numeric.mjs
@@ -0,0 +1,16 @@
+"use strict";
+
+/**
+ * Hashes a string to a numerical value.
+ * NOT CRYPTOGRAPHICALLY SECURE!
+ * @param	{string}	str		The string to hash.
+ * @return	{number}	The resulting hashed value as a number.
+ */
+export default function(str) {
+	let hash = 0;
+	for (let i = 0; i < str.length; i++) {
+		hash = ((hash << 5) - hash) + str.charCodeAt(i);
+		hash |= 0; // Convert to 32bit integer
+	}
+	return hash;
+}
diff --git a/src/lib/io/Log.mjs b/src/lib/io/Log.mjs
new file mode 100644
index 0000000..65a48f3
--- /dev/null
+++ b/src/lib/io/Log.mjs
@@ -0,0 +1,71 @@
+"use strict";
+
+import a from './Ansi.mjs';
+
+const LOG_LEVELS = {
+	DEBUG: 0,
+	INFO: 1,
+	LOG: 2,
+	WARN: 4,
+	ERROR: 8,
+	NONE: 2048
+};
+
+class Log {
+	constructor() {
+		this.start = new Date();
+		
+		this.level = LOG_LEVELS.DEBUG;
+	}
+	
+	
+	debug(...message) {
+		if(this.level > LOG_LEVELS.DEBUG) return;
+		this.__do_log("debug", ...message);
+	}
+	
+	info(...message) {
+		if(this.level > LOG_LEVELS.INFO) return;
+		this.__do_log("info", ...message);
+	}
+	
+	log(...message) {
+		if(this.level > LOG_LEVELS.LOG) return;
+		this.__do_log("log", ...message);
+	}
+	
+	warn(...message) {
+		if(this.level > LOG_LEVELS.WARN) return;
+		this.__do_log("warn", ...message);
+	}
+	
+	error(...message) {
+		if(this.level > LOG_LEVELS.ERROR) return;
+		this.__do_log("error", ...message);
+	}
+	
+	
+	__do_log(level, ...message) {
+		message.unshift(`${a.locol}[ ${((new Date() - this.start) / 1000).toFixed(3)}]${a.reset}`);
+		let part = `[ ${level} ]`;
+		switch(level) {
+			case "debug":
+				part = a.locol + part;
+				break;
+			case "warn":
+				part = a.fyellow + part;
+				break;
+			case "error":
+				part = a.fred + part;
+				break;
+		}
+		message.unshift(part)
+		
+		console.error(...message);
+	}
+}
+
+// You won't normally need these
+export { LOG_LEVELS };
+
+export default new Log();
diff --git a/src/lib/io/NamespacedLog.mjs b/src/lib/io/NamespacedLog.mjs
new file mode 100644
index 0000000..ba2dd2e
--- /dev/null
+++ b/src/lib/io/NamespacedLog.mjs
@@ -0,0 +1,36 @@
+"use strict";
+
+import a from './Ansi.mjs';
+import l from './Log.mjs';
+
+import hash_numeric from '../crypto/hash_numeric.mjs';
+
+class NamespacedLog {
+	constructor(namespace) {
+		this.namespace = namespace;
+		
+		// From https://github.com/debug-js/debug/blob/master/src/node.js#L35
+		let colours = [
+			20, 21, 26, 27, 32, 33, 38, 39, 40, 41, 42, 43, 44, 45, 56, 57, 62,
+			63, 68, 69, 74, 75, 76, 77, 78, 79, 80, 81, 92, 93, 98, 99, 112,
+			113, 128, 129, 134, 135, 148, 149, 160, 161, 162, 163, 164, 165,
+			166, 167, 168, 169, 170, 171, 172, 173, 178, 179, 184, 185, 196,
+			197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209,
+			214, 215, 220, 221
+		];
+		this.nscolour = colours[Math.abs(hash_numeric(this.namespace)) % colours.length];
+		let colouransi = `\u001b[3${(this.nscolour < 8 ? this.nscolour : '8;5;' + this.nscolour)}m`;
+		if(!a.enabled) colouransi = "";
+		this.ns = `${colouransi}${this.namespace}${a.reset}`;
+	}
+	
+	debug(...msg)	{ l.debug(this.ns, ...msg); }
+	info(...msg)	{ l.info(this.ns, ...msg); }
+	log(...msg)		{ l.log(this.ns, ...msg); }
+	warn(...msg)	{ l.warn(this.ns, ...msg); }
+	error(...msg)	{ l.error(this.ns, ...msg); }
+}
+
+export default function(namespace) {
+	return new NamespacedLog(namespace);
+};