reverse-engineering-anything/src/application/AnalysisInput.ts

import type { z } from "zod";
import type { AnalysisError } from "../domain/analysisErrorBase.js";
import { AnalysisCancelledError } from "../domain/analysisErrorCore.js";
import { analysisInputErrorFromIssues } from "../domain/inputIssueProjection.js";
import { err, ok, type Result } from "../domain/result.js";

/** Validate an application request, honoring cancellation before admission when supplied. */
export const parseAnalysisInput = <T>(
  operation: string,
  rawInput: unknown,
  schema: z.ZodType<T>,
  signal?: AbortSignal,
): Result<T, AnalysisError> => {
  if (signal?.aborted)
    return err(new AnalysisCancelledError(operation, { cause: signal.reason }));
  const input = schema.safeParse(rawInput);
  if (!input.success)
    return err(
      analysisInputErrorFromIssues(operation, input.error.issues, rawInput, {
        cause: input.error,
      }),
    );
  return ok(input.data);
};