75 lines · 2.1 KB · TypeScript
RawDownload
import * as Schema from "effect/Schema"; const OAUTH_SCOPE_TOKEN = /^[\u0021\u0023-\u005b\u005d-\u007e]+$/u; export class OAuthScopeEncodingError extends Schema.TaggedErrorClass<OAuthScopeEncodingError>()(  "OAuthScopeEncodingError",  {    scopes: Schema.Array(Schema.String),    invalidScopes: Schema.Array(Schema.String),    duplicateScopes: Schema.Array(Schema.String),  },) {  override get message(): string {    return "OAuth scopes must be non-empty, syntactically valid, and unique.";  }} /** * Decodes an RFC 6749 `scope` value as a set while preserving its first-seen * order for canonical responses and logs. */export function parseOAuthScope(value: string): ReadonlyArray<string> | null {  if (value.length === 0) {    return null;  }   const scopes = value.split(" ");  if (scopes.some((scope) => !OAUTH_SCOPE_TOKEN.test(scope))) {    return null;  }   return [...new Set(scopes)];} export function encodeOAuthScope(scopes: ReadonlyArray<string>): string {  const invalidScopes = scopes.filter((scope) => !OAUTH_SCOPE_TOKEN.test(scope));  const seen = new Set<string>();  const duplicateScopes = new Set<string>();  for (const scope of scopes) {    if (seen.has(scope)) duplicateScopes.add(scope);    seen.add(scope);  }   if (scopes.length === 0 || invalidScopes.length > 0 || duplicateScopes.size > 0) {    throw new OAuthScopeEncodingError({      scopes,      invalidScopes,      duplicateScopes: [...duplicateScopes],    });  }  return scopes.join(" ");} export function oauthScopeSetEquals(value: string, expectedScopes: ReadonlyArray<string>): boolean {  const scopes = parseOAuthScope(value);  return (    scopes !== null &&    scopes.length === new Set(expectedScopes).size &&    scopes.every((scope) => expectedScopes.includes(scope))  );} export function parseAllowedOAuthScope<Scope extends string>(input: {  readonly value: string;  readonly allowedScopes: ReadonlySet<Scope>;}): ReadonlyArray<Scope> | null {  const scopes = parseOAuthScope(input.value);  if (    scopes === null ||    !scopes.every((scope): scope is Scope => input.allowedScopes.has(scope as Scope))  ) {    return null;  }  return scopes;}