common.ts

import type { TypeParameter } from "../data.ts";
import type { Context } from "./context.ts";
import { typeToString } from "./type.ts";

export const documentToString = (document: string): string => {
  const documentTrimmed = document.trim();
  return documentTrimmed === "" ? "" : "\n/**\n" +
    documentTrimmed
      .split("\n")
      .map((line) => line === "" ? " *" : " * " + line.replace(/\*\//gu, "* /"))
      .join("\n") +
    "\n */\n";
};

/**
 * 文字列を`"`で囲んでエスケープする
 */
export const stringLiteralValueToString = (value: string): string =>
  '"' +
  value
    .replace(/\\/gu, "\\\\")
    .replace(/"/gu, '\\"')
    .replace(/\r\n|\n/gu, "\\n") +
  '"';

/**
 * 型パラメーターを文字列にする `<T extends unknown>` `<ok extends unknown, error extends unknown>`
 * extends unknown をつけた理由はJSXでも解釈できるようにするため
 */
export const typeParameterListToString = (
  typeParameterList: ReadonlyArray<TypeParameter>,
  context: Context,
): string => {
  if (typeParameterList.length === 0) {
    return "";
  }
  return (
    "<" +
    typeParameterList
      .map((typeParameter) =>
        typeParameter.name + " extends " +
        (typeParameter.constraint
          ? typeToString(typeParameter.constraint, context)
          : "unknown")
      )
      .join(", ") +
    ">"
  );
};

export const indentNumberToString = (indent: number): string =>
  "  ".repeat(indent);