feat: init and fork some code from angular-auth-oidc-client

src/config/validation/rules/ensure-no-duplicated-configs.rule.ts

@@ -0,0 +1,47 @@
+import { OpenIdConfiguration } from '../../openid-configuration';
+import { POSITIVE_VALIDATION_RESULT, RuleValidationResult } from '../rule';
+
+const createIdentifierToCheck = (passedConfig: OpenIdConfiguration): string => {
+  if (!passedConfig) {
+    return '';
+  }
+
+  const { authority, clientId, scope } = passedConfig;
+
+  return `${authority}${clientId}${scope}`;
+};
+
+const arrayHasDuplicates = (array: string[]): boolean =>
+  new Set(array).size !== array.length;
+
+export const ensureNoDuplicatedConfigsRule = (
+  passedConfigs: OpenIdConfiguration[]
+): RuleValidationResult => {
+  const allIdentifiers = passedConfigs.map((x) => createIdentifierToCheck(x));
+
+  const someAreNotSet = allIdentifiers.some((x) => x === '');
+
+  if (someAreNotSet) {
+    return {
+      result: false,
+      messages: [
+        `Please make sure you add an object with a 'config' property: ....({ config }) instead of ...(config)`,
+      ],
+      level: 'error',
+    };
+  }
+
+  const hasDuplicates = arrayHasDuplicates(allIdentifiers);
+
+  if (hasDuplicates) {
+    return {
+      result: false,
+      messages: [
+        'You added multiple configs with the same authority, clientId and scope',
+      ],
+      level: 'warning',
+    };
+  }
+
+  return POSITIVE_VALIDATION_RESULT;
+};