feat(auth): add WorkOS and Keycloak SSO providers

apps/web/src/lib/sso-providers.ts

@@ -0,0 +1,53 @@
+export type SsoProviderId = 'workos' | 'keycloak';
+
+export interface SsoProvider {
+  id: SsoProviderId;
+  buttonLabel: string;
+  description: string;
+  enabled: boolean;
+  href: string;
+}
+
+const PROVIDER_METADATA: Record<SsoProviderId, Omit<SsoProvider, 'enabled' | 'href'>> = {
+  workos: {
+    id: 'workos',
+    buttonLabel: 'Continue with WorkOS',
+    description: 'Enterprise SSO via WorkOS',
+  },
+  keycloak: {
+    id: 'keycloak',
+    buttonLabel: 'Continue with Keycloak',
+    description: 'Enterprise SSO via Keycloak',
+  },
+};
+
+export function getEnabledSsoProviders(): SsoProvider[] {
+  return (Object.keys(PROVIDER_METADATA) as SsoProviderId[])
+    .map((providerId) => getSsoProvider(providerId))
+    .filter((provider): provider is SsoProvider => provider?.enabled === true);
+}
+
+export function getSsoProvider(providerId: string): SsoProvider | null {
+  if (!isSsoProviderId(providerId)) {
+    return null;
+  }
+
+  return {
+    ...PROVIDER_METADATA[providerId],
+    enabled: isSsoProviderEnabled(providerId),
+    href: `/auth/provider/${providerId}`,
+  };
+}
+
+function isSsoProviderId(value: string): value is SsoProviderId {
+  return value === 'workos' || value === 'keycloak';
+}
+
+function isSsoProviderEnabled(providerId: SsoProviderId): boolean {
+  switch (providerId) {
+    case 'workos':
+      return process.env['NEXT_PUBLIC_WORKOS_ENABLED'] === 'true';
+    case 'keycloak':
+      return process.env['NEXT_PUBLIC_KEYCLOAK_ENABLED'] === 'true';
+  }
+}