move settings validator

src/shared/settings/validator.js

@@ -0,0 +1,61 @@
+import operations from 'shared/operations';
+
+const VALID_TOP_KEYS = ['keymaps', 'search', 'blacklist'];
+const VALID_OPERATION_VALUES = Object.keys(operations).map((key) => {
+  return operations[key];
+});
+
+const validateInvalidTopKeys = (settings) => {
+  let invalidKey = Object.keys(settings).find((key) => {
+    return !VALID_TOP_KEYS.includes(key);
+  });
+  if (invalidKey) {
+    throw Error(`Unknown key: "${invalidKey}"`);
+  }
+};
+
+const validateKeymaps = (keymaps) => {
+  for (let key of Object.keys(keymaps)) {
+    let value = keymaps[key];
+    if (!VALID_OPERATION_VALUES.includes(value.type)) {
+      throw Error(`Unknown operation: "${value.type}"`);
+    }
+  }
+};
+
+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 };