From 81d0426a76fcf8d62754a2d09cb1a341c0639db9 Mon Sep 17 00:00:00 2001
From: Jeromy <jeromyj@gmail.com>
Date: Tue, 19 Jan 2016 07:54:10 -0800
Subject: [PATCH] initial

---
 index.js     | 118 +++++++++++++++++++++++++++++++++++++++++++++++++++
 package.json |  22 ++++++++++
 test.js      |  90 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 230 insertions(+)
 create mode 100644 index.js
 create mode 100644 package.json
 create mode 100644 test.js

diff --git a/index.js b/index.js
new file mode 100644
index 0000000..192e8ca
--- /dev/null
+++ b/index.js
@@ -0,0 +1,118 @@
+var multiaddr = require('multiaddr')
+
+var IP = or(base('ip4'), base('ip6'))
+var TCP = and(IP, base('tcp'))
+var UDP = and(IP, base('udp'))
+var UTP = and(UDP, base('utp'))
+var Reliable = or(TCP, UTP)
+var IPFS = and(Reliable, base('ipfs'))
+
+exports.IP = IP
+exports.TCP = TCP
+exports.UDP = UDP
+exports.UTP = UTP
+exports.Reliable = Reliable
+exports.IPFS = IPFS
+
+function and() {
+	var args = Array.from(arguments)
+
+	function matches(a) {
+		if (typeof a === 'string') {
+			a = multiaddr(a)
+		}
+		out = partialMatch(a.protoNames())
+		if (out === null) {
+			return false
+		}
+		return out.length === 0
+	}
+
+	function partialMatch(a) {
+		if (a.length < args.length) {
+			return null
+		}
+
+		args.some(function(arg) {
+			a = arg.partialMatch(a)
+			if (a === null) {
+				return true
+			}
+		})
+
+		return a
+	}
+
+	return {
+		input: args,
+		matches: matches,
+		partialMatch: partialMatch,
+	}
+}
+
+function or() {
+	var args = Array.from(arguments)
+
+	function matches(a) {
+		if (typeof a === 'string') {
+			a = multiaddr(a)
+		}
+		var out = partialMatch(a.protoNames())
+		if (out === null) {
+			return false
+		}
+		return out.length === 0
+	}
+
+	function partialMatch(a) {
+		var out = null
+		args.some(function(arg) {
+			res = arg.partialMatch(a)
+			if (res) {
+				out = res
+				return true
+			}
+		})
+
+		return out
+	}
+
+	return {
+		toString: function() { return "{ " + args.join(" ") + " }" },
+		input: args,
+		matches: matches,
+		partialMatch: partialMatch,
+	}
+}
+
+function base(n) {
+	var name = n
+	function matches(a) {
+		if (typeof a === 'string') {
+			a = multiaddr(a)
+		}
+
+		pnames = a.protoNames()
+		if (pnames.length === 1 && pnames[0] === name) {
+			return true
+		}
+		return false
+	}
+
+	function partialMatch(protos) {
+		if (protos.length === 0) {
+			return null
+		}
+
+		if (protos[0] === name) {
+			return protos.slice(1)
+		}
+		return null
+	}
+
+	return {
+		toString: function() {return name} ,
+		matches: matches,
+		partialMatch: partialMatch,
+	}
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..6b7a4dd
--- /dev/null
+++ b/package.json
@@ -0,0 +1,22 @@
+{
+  "name": "js-mafmt",
+  "version": "1.0.0",
+  "description": "A multiaddr validator",
+  "main": "index.js",
+  "scripts": {
+    "test": "node test.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/whyrusleeping/js-mafmt.git"
+  },
+  "keywords": [
+    "multiaddr"
+  ],
+  "author": "whyrusleeping",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/whyrusleeping/js-mafmt/issues"
+  },
+  "homepage": "https://github.com/whyrusleeping/js-mafmt#readme"
+}
diff --git a/test.js b/test.js
new file mode 100644
index 0000000..86034b4
--- /dev/null
+++ b/test.js
@@ -0,0 +1,90 @@
+var test = require('tape')
+var mafmt = require('./')
+
+test('basic stuff works', function(t) {
+
+	var good_ip = [
+		"/ip4/0.0.0.0",
+		"/ip6/fc00::",
+	]
+
+	var bad_ip = [
+		"/ip4/0.0.0.0/tcp/555",
+		"/udp/789/ip6/fc00::",
+	]
+
+	var good_tcp = [
+		"/ip4/0.0.7.6/tcp/1234",
+		"/ip6/::/tcp/0",
+	]
+
+	var bad_tcp = [
+		"/tcp/12345",
+		"/ip6/fc00::/udp/5523/tcp/9543",
+	]
+
+	var good_udp = [
+		"/ip4/0.0.7.6/udp/1234",
+		"/ip6/::/udp/0",
+	]
+
+	var bad_udp = [
+		"/udp/12345",
+		"/ip6/fc00::/tcp/5523/udp/9543",
+	]
+
+/*
+	var good_utp = [
+		"/ip4/1.2.3.4/udp/3456/utp",
+		"/ip6/::/udp/0/utp",
+	]
+
+	var bad_utp = [
+		"/ip4/0.0.0.0/tcp/12345/utp",
+		"/ip6/1.2.3.4/ip4/0.0.0.0/udp/1234/utp",
+		"/utp",
+	]
+	*/
+
+	function assertMatches(p) {
+		var tests = Array.from(arguments).slice(1)
+		tests.forEach(function(test) {
+			test.forEach(function(testcase) {
+				if (!p.matches(testcase)) {
+					t.fail("should have matched: " + testcase + " " + p)
+				}
+			})
+		})
+	}
+
+	function assertMismatches(p) {
+		var tests = Array.from(arguments).slice(1)
+		tests.forEach(function(test) {
+			test.forEach(function(testcase) {
+				t.equal(p.matches(testcase), false, "should not have matched: "+testcase+" "+p)
+			})
+		})
+	}
+
+
+	assertMatches(mafmt.IP, good_ip)
+	assertMismatches(mafmt.IP, bad_ip, good_tcp)
+
+	assertMatches(mafmt.TCP, good_tcp)
+	assertMismatches(mafmt.TCP, bad_tcp, good_ip)
+
+	assertMatches(mafmt.UDP, good_udp)
+	assertMismatches(mafmt.UDP, bad_udp, good_ip, good_tcp /*, good_utp*/)
+
+	/*
+	assertMatches(mafmt.UTP, good_utp)
+	assertMismatches(mafmt.UTP, bad_utp, good_ip, good_tcp, good_udp)
+
+	assertMatches(mafmt.Reliable, good_utp, good_tcp)
+	assertMismatches(mafmt.Reliable, good_ip, good_udp)
+	*/
+
+	t.end()
+})
+
+