Search keywords on paste

src/shared/urls.js

@@ -0,0 +1,25 @@
+const trimStart = (str) => {
+  // NOTE String.trimStart is available on Firefox 61
+  return str.replace(/^\s+/, '');
+};
+
+const normalizeUrl = (keywords, searchSettings) => {
+  try {
+    return new URL(keywords).href;
+  } catch (e) {
+    if (keywords.includes('.') && !keywords.includes(' ')) {
+      return 'http://' + keywords;
+    }
+    let template = searchSettings.engines[searchSettings.default];
+    let query = keywords;
+
+    let first = trimStart(keywords).split(' ')[0];
+    if (Object.keys(searchSettings.engines).includes(first)) {
+      template = searchSettings.engines[first];
+      query = trimStart(trimStart(keywords).slice(first.length));
+    }
+    return template.replace('{}', encodeURIComponent(query));
+  }
+};
+
+export { normalizeUrl };