From 5eafdf5c0b2f2781833279d294cdec967e4d8a39 Mon Sep 17 00:00:00 2001
From: Luke Barnard <lukeb@openmarket.com>
Date: Wed, 10 May 2017 11:51:32 +0100
Subject: [PATCH 1/2] Implement API for username availability

Requires synapse with https://github.com/matrix-org/synapse/pull/2183
---
 src/base-apis.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/base-apis.js b/src/base-apis.js
index 6752ad1c5e2..2a320104365 100644
--- a/src/base-apis.js
+++ b/src/base-apis.js
@@ -120,6 +120,20 @@ MatrixBaseApis.prototype.makeTxnId = function() {
 // Registration/Login operations
 // =============================
 
+/**
+ * Check whether a username is available prior to registration. An error response
+ * indicates an invalid/unavailable username.
+ * @param {string} username The username to check the availability of.
+ * @return {module:client.Promise} Resolves: to `true`.
+ */
+MatrixBaseApis.prototype.isUsernameAvailable = function(username) {
+    return this._http.authedRequest(
+        undefined, "POST", '/register/available', null, { username: username },
+    ).then((response) => {
+        return response.available;
+    });
+};
+
 /**
  * @param {string} username
  * @param {string} password

From d920e0f97c54e60406dcdbf505b0c9972282aff6 Mon Sep 17 00:00:00 2001
From: Luke Barnard <lukeb@openmarket.com>
Date: Wed, 10 May 2017 17:35:54 +0100
Subject: [PATCH 2/2] Update to reflect
 https://github.com/matrix-org/synapse/pull/2213

---
 src/base-apis.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/base-apis.js b/src/base-apis.js
index 2a320104365..671ddcb01fe 100644
--- a/src/base-apis.js
+++ b/src/base-apis.js
@@ -128,7 +128,7 @@ MatrixBaseApis.prototype.makeTxnId = function() {
  */
 MatrixBaseApis.prototype.isUsernameAvailable = function(username) {
     return this._http.authedRequest(
-        undefined, "POST", '/register/available', null, { username: username },
+        undefined, "GET", '/register/available', { username: username },
     ).then((response) => {
         return response.available;
     });