add uri parsing.

lib/bcoin/uri.js

@@ -0,0 +1,61 @@
+/*!
+ * uri.js - uri parsing for bcoin
+ * Copyright (c) 2014-2015, Fedor Indutny (MIT License)
+ * Copyright (c) 2014-2016, Christopher Jeffrey (MIT License).
+ * https://github.com/indutny/bcoin
+ */
+
+var url = require('url');
+var querystring = require('querystring');
+
+exports.parse = function parse(uri) {
+  var data = url.parse(uri);
+  var query = querystring.parse(data.query || '');
+
+  assert(data.protocol === 'bitcoin:', 'Not a bitcoin URI.');
+  assert(data.hostname, 'No address present.');
+
+  return {
+    address: data.hostname,
+    amount: query.amount ? utils.satoshi(query.amount) : null,
+    label: query.label || null,
+    message: query.message || null,
+    request: query.r || null
+  };
+};
+
+exports.validate = function validate(uri) {
+  try {
+    exports.parse(uri);
+    return true;
+  } catch (e) {
+    return false;
+  }
+};
+
+exports.stringify = function stringify(address, amount) {
+  var query = {};
+  var data = address;
+  var uri;
+
+  if (typeof address === 'string')
+    data = { address: address, amount: amount };
+
+  assert(data.address, 'Address is required for a bitcoin URI.');
+
+  uri = 'bitcoin:' + data.address;
+
+  if (data.amount)
+    query.amount = utils.btc(data.amount);
+
+  if (data.label)
+    query.label = data.label;
+
+  if (data.message)
+    query.message = data.message;
+
+  if (data.request)
+    query.r = data.request;
+
+  return uri + querystring.stringify(query);
+};