Function postExtract

src/resolution/frameworks/nestjs.ts:217–266

* Cross-file finalization for `RouterModule.register([...])`. The per-file * extract() above only sees `@Controller(prefix) + @Get(path)` — it can't * learn about the route prefix supplied by a sibling `app.module.ts` like: * * RouterModule.register([ * { path: 'admin', module:

(context: ResolutionContext)

   * the same input regardless of how many times it has already prefixed).
   */
  postExtract(context: ResolutionContext): Node[] {
    const moduleToPrefix = new Map<string, string>();
    const controllerToModule = new Map<string, string>();

    for (const filePath of context.getAllFiles()) {
      if (!/\.module\.(m?[jt]s|cjs)$/.test(filePath)) continue;
      const content = context.readFile(filePath);
      if (!content) continue;
      const safe = stripCommentsForRegex(content, detectLanguage(filePath));
      collectRouterModuleRegistrations(safe, moduleToPrefix);
      collectModuleControllers(safe, controllerToModule);
    }

    const controllerToPrefix = new Map<string, string>();
    for (const [controller, module] of controllerToModule) {
      const prefix = moduleToPrefix.get(module);
      // `''` and `'/'` are no-op prefixes; skip them so we don't run updates
      // that would set name to the value it already has.
      if (prefix && prefix !== '' && prefix !== '/') {
        controllerToPrefix.set(controller, prefix);
      }
    }

    if (controllerToPrefix.size === 0) return [];

    const updates: Node[] = [];
    for (const [controllerName, prefix] of controllerToPrefix) {
      const classes = context
        .getNodesByName(controllerName)
        .filter((n) => n.kind === 'class');
      for (const cls of classes) {
        const routes = context
          .getNodesInFile(cls.filePath)
          .filter((n) => n.kind === 'route');
        for (const route of routes) {
          // Multiple controllers can live in one file (covered by the
          // existing "attributes methods to the right controller" test);
          // each route must be associated with the controller whose line
          // range contains it.
          if (route.startLine < cls.startLine || route.startLine > cls.endLine) {
            continue;
          }
          const updated = applyModulePrefix(route, prefix);
          if (updated && updated.name !== route.name) updates.push(updated);
        }
      }
    }

    return updates;
  },
};

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