1 files changed, 43 insertions, 0 deletions
diff --git a/src/shared/urls.ts b/src/shared/urls.ts
new file mode 100644
index 0000000..18349c8
--- /dev/null
+++ b/src/shared/urls.ts
@@ -0,0 +1,43 @@
+const trimStart = (str: string): string => {
+  // NOTE String.trimStart is available on Firefox 61
+  return str.replace(/^\s+/, '');
+};
+
+const SUPPORTED_PROTOCOLS = ['http:', 'https:', 'ftp:', 'mailto:', 'about:'];
+
+const searchUrl = (keywords: string, searchSettings: any): string => {
+  try {
+    let u = new URL(keywords);
+    if (SUPPORTED_PROTOCOLS.includes(u.protocol.toLowerCase())) {
+      return u.href;
+    }
+  } catch (e) {
+    // fallthrough
+  }
+  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));
+};
+
+const normalizeUrl = (url: string): string => {
+  try {
+    let u = new URL(url);
+    if (SUPPORTED_PROTOCOLS.includes(u.protocol.toLowerCase())) {
+      return u.href;
+    }
+  } catch (e) {
+    // fallthrough
+  }
+  return 'http://' + url;
+};
+
+export { searchUrl, normalizeUrl };