Remove race between multiple autocomplete requests (#4860)

1 files changed, 28 insertions, 0 deletions

diff --git a/webapp/components/suggestion/provider.jsx b/webapp/components/suggestion/provider.jsx
new file mode 100644
index 000000000..db34dcebf
--- /dev/null
+++ b/webapp/components/suggestion/provider.jsx
@@ -0,0 +1,28 @@
+// Copyright (c) 2016 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+export default class Provider {
+    constructor() {
+        this.latestPrefix = '';
+        this.latestComplete = true;
+    }
+
+    handlePretextChanged(suggestionId, pretext) { // eslint-disable-line no-unused-vars
+        // NO-OP for inherited classes to override
+    }
+
+    startNewRequest(prefix) {
+        this.latestPrefix = prefix;
+        this.latestComplete = false;
+    }
+
+    shouldCancelDispatch(prefix) {
+        if (prefix === this.latestPrefix) {
+            this.latestComplete = true;
+        } else if (this.latestComplete) {
+            return true;
+        }
+
+        return false;
+    }
+}