From 42e797de5e60f1e5e84d55655de74cc983a932ff Mon Sep 17 00:00:00 2001
From: Kegan Dougal <kegan@matrix.org>
Date: Mon, 1 Jun 2020 18:41:58 +0100
Subject: [PATCH] Unbreak dendritejs

---
 .../storage/accounts/sqlite3/constraint.go    | 27 +++++++++++++++++++
 .../accounts/sqlite3/constraint_wasm.go       | 21 +++++++++++++++
 .../auth/storage/accounts/sqlite3/storage.go  |  4 +--
 3 files changed, 49 insertions(+), 3 deletions(-)
 create mode 100644 clientapi/auth/storage/accounts/sqlite3/constraint.go
 create mode 100644 clientapi/auth/storage/accounts/sqlite3/constraint_wasm.go

diff --git a/clientapi/auth/storage/accounts/sqlite3/constraint.go b/clientapi/auth/storage/accounts/sqlite3/constraint.go
new file mode 100644
index 000000000..32f96c8e4
--- /dev/null
+++ b/clientapi/auth/storage/accounts/sqlite3/constraint.go
@@ -0,0 +1,27 @@
+// Copyright 2020 The Matrix.org Foundation C.I.C.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !wasm
+
+package sqlite3
+
+import (
+	"errors"
+
+	"github.com/mattn/go-sqlite3"
+)
+
+func isConstraintError(err error) bool {
+	return errors.Is(err, sqlite3.ErrConstraint)
+}
diff --git a/clientapi/auth/storage/accounts/sqlite3/constraint_wasm.go b/clientapi/auth/storage/accounts/sqlite3/constraint_wasm.go
new file mode 100644
index 000000000..b5077c070
--- /dev/null
+++ b/clientapi/auth/storage/accounts/sqlite3/constraint_wasm.go
@@ -0,0 +1,21 @@
+// Copyright 2020 The Matrix.org Foundation C.I.C.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build wasm
+
+package sqlite3
+
+func isConstraintError(err error) bool {
+	return false
+}
\ No newline at end of file
diff --git a/clientapi/auth/storage/accounts/sqlite3/storage.go b/clientapi/auth/storage/accounts/sqlite3/storage.go
index 4b4367082..5233001f2 100644
--- a/clientapi/auth/storage/accounts/sqlite3/storage.go
+++ b/clientapi/auth/storage/accounts/sqlite3/storage.go
@@ -26,9 +26,7 @@ import (
 	"github.com/matrix-org/dendrite/internal/sqlutil"
 	"github.com/matrix-org/gomatrixserverlib"
 	"golang.org/x/crypto/bcrypt"
-
 	// Import the sqlite3 database driver.
-	"github.com/mattn/go-sqlite3"
 )
 
 // Database represents an account database
@@ -172,7 +170,7 @@ func (d *Database) createAccount(
 		}
 	}
 	if err := d.profiles.insertProfile(ctx, txn, localpart); err != nil {
-		if errors.Is(err, sqlite3.ErrConstraint) {
+		if isConstraintError(err) {
 			return nil, internal.ErrUserExists
 		}
 		return nil, err