123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170
import {  createHash,  decode,  encode,  gunzip,  gzip,  json,  sift,  validateRequest,} from "./deps.ts";import { renderHtml } from "./render_html.ts";import { ConfigObject } from "./types.ts";import { deleteItem, getItem, putItem } from "./dynamodb.ts";
export function applyHash(token: string) {  return createHash("sha256").update(`${token}`).toString();}
const NAME_REGEX = /^[a-z][a-z0-9_-]{2,64}$/;const TOKEN_REGEX = /^[!-~]{8,128}$/;
export function validateName(name: string) {  return NAME_REGEX.test(name);}
export function validateToken(token: string) {  return TOKEN_REGEX.test(token);}
export function validateConfig(config: string) {  try {    const { list } = JSON.parse(config);    return !!(list);  } catch (_) {    return false;  }}export function encodeConfig(rawConfig: string) {  // use parse and stringify to minify json  return encode(    gzip(      new TextEncoder().encode(        JSON.stringify(JSON.parse(rawConfig)),      ),    ),  );}export function decodeConfig(compressedConfig: string) {  return JSON.parse(    new TextDecoder().decode(gunzip(decode(compressedConfig))),  ) as ConfigObject;}
sift({  "/": async (request) => {    const { error, body } = await validateRequest(request, {      GET: {},      POST: {        body: ["name", "token", "config"],      },      DELETE: {        body: ["name", "token"],      },    });    if (error) {      return json({ error: error.message }, { status: error.status });    }    if (body == null) {      return json({ message: "could not process the data." }, { status: 400 });    }
    if (request.method === "GET") {      return json({        message:          "please access with POST to create new data or DELETE to delete the data. https://github.com/kawarimidoll/denote",      });    }
    const name = `${body.name}`;    const token = `${body.token}`;    const rawConfig = `${body.config}`;
    if (!validateName(name)) {      return json({        message: `invalid name. this must match with ${NAME_REGEX}`,      });    }    if (!validateToken(token)) {      return json({        message: `invalid token. this must match with ${TOKEN_REGEX}`,      });    }    if (!validateConfig(rawConfig)) {      return json({        message:          "invalid config. this must be a valid JSON which contains 'list' key.",      });    }
    const hashedToken = applyHash(name + token);
    const config = encodeConfig(rawConfig);
    if (request.method === "POST") {      const item = await getItem(name);      if (item && item.hashedToken !== hashedToken) {        return json({          message:            `the token is incorrect. use correct token to update the record or use other name to create new one.`,        }, { status: 401 });      }
      const result = await putItem({ name, hashedToken, config });      if (result) {        return json({          message: "data is saved successfully. do not forget your token.",          name,          token,        });      }    }
    if (request.method === "DELETE") {      const item = await getItem(name);      if (!item) {        return json({          message: `the name '${name}' is not exist.`,        }, { status: 404 });      }
      if (item.hashedToken !== hashedToken) {        return json({          message:            `the name '${name}' is already exist but the token is incorrect. use correct token to delete the record.`,        }, { status: 401 });      }
      const result = await deleteItem(name);      if (result) {        return json({          message: `the data of the name '${name}' is deleted successfully.`,        });      }    }    return json({ message: "something went wrong." }, { status: 500 });  },  "/:slug": async (_, params) => {    const name = Array.isArray(params.slug) ? params.slug[0] : params.slug;    console.log(name);
    const item = await getItem(name);
    if (!(item?.config)) {      return json({ message: "not found." }, { status: 404 });    }
    try {      const rawConfig = decodeConfig(item.config);      rawConfig.name ||= name;      console.log({ rawConfig });      const html = renderHtml(rawConfig, true);      return new Response(html, { headers: { "content-type": "text/html" } });    } catch (error) {      console.warn(error);    }    return json({ message: "something went wrong." }, { status: 500 });  },  404: () => json({ message: "not found." }, { status: 404 }),});