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import type { Transformer } from "./deps.deno.ts";
const wellKnownParseModesMap = new Map([  ["html", "HTML"],  ["markdown", "Markdown"],  ["markdownv2", "MarkdownV2"],]);
/** * Creates a new transformer for the given parse mode. * @param parseMode {string} The parse mode to use. If the parse mode is not in the well known parse modes map, it will be used as is. * @see https://core.telegram.org/bots/api#formatting-options for well known parse modes. * @returns {Transformer} The transformer. */const buildTransformer = (parseMode: string) => {  const normalisedParseMode =    wellKnownParseModesMap.get(parseMode.toLowerCase()) ?? parseMode;  if (!wellKnownParseModesMap.has(parseMode.toLowerCase())) {    console.warn(      `Could not find parse_mode: ${parseMode}. If this is a valid parse_mode, you should ignore this message.`,    );  }
  const transformer: Transformer = (prev, method, payload, signal) => {    if (!payload || "parse_mode" in payload) {      return prev(method, payload, signal);    }
    switch (method) {      case "editMessageMedia":        if (          "media" in payload &&          !("parse_mode" in payload.media)        ) {          // @ts-ignore          payload.media.parse_mode = normalisedParseMode;        }        break;
      case "answerInlineQuery":        if ("results" in payload) {          for (const result of payload.results) {            if (              "input_message_content" in result &&              // @ts-ignore              !("parse_mode" in result.input_message_content)            ) {              // @ts-ignore              result.input_message_content.parse_mode = normalisedParseMode;            } else if (!("parse_mode" in result)) {              // @ts-ignore              result.parse_mode = normalisedParseMode;            }          }        }        break;
      default:        payload = { ...payload, ...{ parse_mode: normalisedParseMode } };    }
    return prev(      method,      payload,      signal,    );  };  return transformer;};
export { buildTransformer as parseMode };