Function buildClassScopes

src/resolution/frameworks/nestjs.ts:429–453

* Build the list of class-level decorator scopes, sorted by position. Each * scope runs from its decorator up to the next class decorator (of any kind), * which lets a method decorator find its enclosing class regardless of how * many classes share a file.

(safe: string)

 * many classes share a file.
 */
function buildClassScopes(safe: string): ClassScope[] {
  const defs: Array<{ kind: ClassKind; name: string; prefixOf: (a: string) => string }> = [
    { kind: 'controller', name: 'Controller', prefixOf: parseControllerPrefix },
    { kind: 'resolver', name: 'Resolver', prefixOf: () => '' },
    { kind: 'gateway', name: 'WebSocketGateway', prefixOf: parseGatewayNamespace },
    { kind: 'other', name: 'Injectable', prefixOf: () => '' },
    { kind: 'other', name: 'Module', prefixOf: () => '' },
    { kind: 'other', name: 'Catch', prefixOf: () => '' },
  ];

  const raw: Array<{ kind: ClassKind; prefix: string; index: number }> = [];
  for (const def of defs) {
    for (const hit of findDecorators(safe, [def.name])) {
      raw.push({ kind: def.kind, prefix: def.prefixOf(hit.args), index: hit.index });
    }
  }
  raw.sort((a, b) => a.index - b.index);

  return raw.map((r, i) => ({
    kind: r.kind,
    prefix: r.prefix,
    start: r.index,
    end: i + 1 < raw.length ? raw[i + 1]!.index : safe.length,
  }));
}

function scopeFor(scopes: ClassScope[], index: number): ClassScope | null {
  for (const s of scopes) {