search engine validation

src/shared/validators/setting.js

@@ -23,11 +23,39 @@ const validateKeymaps = (keymaps) => {
   }
 };
 
+const validateSearch = (search) => {
+  let engines = search.engines;
+  for (let key of Object.keys(engines)) {
+    if (/\s/.test(key)) {
+      throw new Error(
+        `While space in search engine name is not allowed: "${key}"`
+      );
+    }
+    let url = engines[key];
+    if (!url.match(/{}/)) {
+      throw new Error(`No {}-placeholders in URL of "${key}"`);
+    }
+    if (url.match(/{}/g).length > 1) {
+      throw new Error(`Multiple {}-placeholders in URL of "${key}"`);
+    }
+  }
+
+  if (!search.default) {
+    throw new Error(`Default engine is not set`);
+  }
+  if (!Object.keys(engines).includes(search.default)) {
+    throw new Error(`Default engine "${search.default}" not found`);
+  }
+};
+
 const validate = (settings) => {
   validateInvalidTopKeys(settings);
   if (settings.keymaps) {
     validateKeymaps(settings.keymaps);
   }
+  if (settings.search) {
+    validateSearch(settings.search);
+  }
 };
 
 export { validate };