room, user, ddg autocomplete providers (wip)

src/autocomplete/DuckDuckGoProvider.js

@@ -0,0 +1,35 @@
+import AutocompleteProvider from './AutocompleteProvider';
+import Q from 'q';
+import 'whatwg-fetch';
+
+const DDG_REGEX = /\/ddg\w+(.+)$/;
+const REFERER = 'vector';
+
+export default class DuckDuckGoProvider extends AutocompleteProvider {
+    static getQueryUri(query: String) {
+        return `http://api.duckduckgo.com/?q=${encodeURIComponent(query)}&format=json&t=${encodeURIComponent(REFERER)}`;
+    }
+
+    getCompletions(query: String) {
+        if(!query)
+            return Q.when([]);
+
+        let promise = Q.defer();
+        fetch(DuckDuckGoProvider.getQueryUri(query), {
+            method: 'GET'
+        }).then(response => {
+            let results = response.Results.map(result => {
+                return {
+                    title: result.Text,
+                    description: result.Result
+                };
+            });
+            promise.resolve(results);
+        });
+        return promise;
+    }
+
+    getName() {
+        return 'Results from DuckDuckGo';
+    }
+}