submit.ts

import { GenerateUploadURL } from "../../gcloud.js";

function errorResponse(error: string, status: number): Response {
  return new Response(JSON.stringify({ error }), {
    headers: {
      "content-type": "application/json",
    },
    status,
  });
}

export async function onRequestPost(context: RequestContext) {
  const { actions, bypass, description, files, turnstileResponse, usernames } =
    context.data.body;

  if (!context.data.current_user) {
    if (typeof turnstileResponse !== "string")
      return errorResponse("You must complete the captcha", 401);

    const turnstileAPIResponse = await fetch(
      "https://challenges.cloudflare.com/turnstile/v0/siteverify",
      {
        body: JSON.stringify({
          remoteip: context.request.headers.get("CF-Connecting-IP"),
          response: turnstileResponse,
          secret: context.env.TURNSTILE_SECRETKEY,
        }),
        headers: {
          "content-type": "application/json",
        },
        method: "POST",
      },
    );

    const { success }: { success: boolean } = await turnstileAPIResponse.json();

    if (!success) return errorResponse("Captcha test failed", 403);
  }

  const origin = context.request.headers.get("Origin");
  if (!origin) return errorResponse("No origin header", 400);

  if (bypass && !(context.data.current_user?.permissions & (1 << 5)))
    return errorResponse("Bypass directive cannot be used", 403);

  if (typeof bypass !== "boolean")
    return errorResponse("Bypass must be a boolean", 400);

  if (!Array.isArray(usernames))
    return errorResponse("Usernames must be type of array", 400);

  if (
    !["string", "undefined"].includes(typeof description) ||
    description?.length > 512
  )
    return errorResponse("Invalid description", 400);

  if (
    !Array.isArray(files) ||
    files.find((file) => {
      const keys = Object.keys(file);

      return !keys.includes("name") || !keys.includes("size");
    })
  )
    return errorResponse("File list missing name(s) and/or size(s)", 400);

  if (
    files.find(
      (file) =>
        typeof file.name !== "string" ||
        typeof file.size !== "number" ||
        file.size < 0 ||
        file.size > 536870912,
    )
  )
    return errorResponse(
      "One or more files contain an invalid name or size",
      400,
    );

  if (!usernames.length || usernames.length > 20)
    return errorResponse(
      "Number of usernames provided must be between 1 and 20",
      400,
    );

  for (const username of usernames) {
    if (
      username.length < 3 ||
      username.length > 20 ||
      username.match(/_/g)?.length > 1
    )
      return errorResponse(`Username "${username}" is invalid`, 400);
  }

  const rbxSearchReq = await fetch(
    "https://users.roblox.com/v1/usernames/users",
    {
      body: JSON.stringify({
        usernames,
        excludeBannedUsers: true,
      }),
      headers: {
        "content-type": "application/json",
      },
      method: "POST",
    },
  );

  if (!rbxSearchReq.ok)
    return errorResponse(
      "Failed to locate Roblox users due to upstream error",
      500,
    );

  const rbxSearchData: { data: { [k: string]: any }[] } =
    await rbxSearchReq.json();

  if (rbxSearchData.data.length < usernames.length) {
    const missingUsers = [];

    for (const userData of rbxSearchData.data) {
      if (!usernames.includes(userData.requestedUsername))
        missingUsers.push(userData.requestedUsername);
    }

    return errorResponse(
      `The following users do not exist or are banned from Roblox: ${missingUsers.toString()}`,
      400,
    );
  }

  const metaIDs = [];
  const metaNames = [];

  for (const data of rbxSearchData.data) {
    metaIDs.push(data.id);
    metaNames.push(data.name);
  }

  const uploadUrlPromises: Promise<string>[] = [];

  for (const file of files) {
    const fileParts = file.name.split(".");
    let fileExten = fileParts.at(-1);

    if (fileExten.toLowerCase() === "mov")
      fileExten = "mp4"

    if (
      fileParts.length < 2 ||
      ![
        "mkv",
        "mp4",
        "wmv",
        "jpg",
        "png",
        "m4v",
        "jpeg",
        "jfif",
        "gif",
        "webm",
        "heif",
        "heic",
        "webp",
      ].includes(fileExten.toLowerCase())
    )
      return errorResponse(
        `File ${file.name} cannot be uploaded as it is unsupported`,
        415,
      );

    const fileUploadKey = `${crypto.randomUUID().replaceAll("-", "")}/${crypto
      .randomUUID()
      .replaceAll("-", "")}${context.request.headers.get(
      "cf-ray",
    )}${Date.now()}`;

    uploadUrlPromises.push(
      GenerateUploadURL(
        context.env,
        `t/${fileUploadKey}`,
        file.size,
        fileExten,
        origin,
      ),
    );
  }

  const uploadUrlResults = await Promise.allSettled(uploadUrlPromises);

  const reportId = `${Date.now()}${context.request.headers.get(
    "cf-ray",
  )}${crypto.randomUUID().replaceAll("-", "")}`;

  const { current_user: currentUser } = context.data;

  await context.env.DATA.put(
    `reportprocessing_${reportId}`,
    currentUser?.id || context.request.headers.get("CF-Connecting-IP"),
    { expirationTtl: 3600 },
  );

  if (uploadUrlResults.find((uploadUrl) => uploadUrl.status === "rejected"))
    return errorResponse("Failed to generate upload url", 500);

  const attachments: string[] = [];
  const uploadUrls: string[] = [];

  for (const urlResult of uploadUrlResults as PromiseFulfilledResult<string>[]) {
    uploadUrls.push(urlResult.value);

    let url = urlResult.value.replace("t/", "");
    const extension = (url.split(".").at(-1) as string).toLowerCase();

    if (["mkv", "wmv"].includes(extension)) {
      await context.env.DATA.put(`videoprocessing_${url.replace(`.${extension}`, ".mp4")}`, "1", {
        expirationTtl: 600,
      });

      url = url.replace(`.${extension}`, ".mp4");
    }

    attachments.push(url);
  }

  await context.env.DATA.put(
    `report_${reportId}`,
    JSON.stringify({
      attachments,
      id: reportId,
      open: !bypass,
      user: currentUser
        ? {
            email: currentUser.email,
            id: currentUser.id,
            username: currentUser.username,
          }
        : null,
      target_ids: metaIDs,
      target_usernames: metaNames,
    }),
  );

  try {
    await context.env.D1.prepare(
      "INSERT INTO reports (created_at, id, open, user) VALUES (?, ?, ?, ?);",
    )
      .bind(Date.now(), reportId, Number(!bypass), currentUser?.id || null)
      .run();
  } catch {}

  return new Response(
    JSON.stringify({ id: reportId, upload_urls: uploadUrls }),
    {
      headers: {
        "content-type": "application/json",
      },
    },
  );
}