nostrMediaUpload/index.js

// Import the Nostr SDK package
import { NDKNip07Signer } from "@nostr-dev-kit/ndk";
import NDK from "@nostr-dev-kit/ndk";

document.querySelector("button").addEventListener("click", login);

async function fetchUserProfile(npub, ndk) {
  try {
    console.log("Fetching user profile for npub:", npub);
    const user = ndk.getUser({ npub });
    await user.fetchProfile();
    console.log("User profile:", user.profile);
    return user;
  } catch (error) {
    console.error("Error fetching user profile:", error);
    throw error;
  }
}
const relays = ["wss://purplepag.es"];
const ndk = new NDK({ explicitRelayUrls: relays });

async function login() {
  try {
    const signer = new NDKNip07Signer();

    // Connect to the NDK
    await ndk.connect();

    // Wait for the user to be obtained from the signer
    const user = await signer.user();

    if (!!user.pubkey && user.npub) {
      console.log("Permission granted to read their public key:", user.pubkey);

      // Fetch user profile
      const userProfile = await fetchUserProfile(user.npub, ndk);
      const nip05 = userProfile.profile.nip05;

      console.log("User's nip05:", nip05);

      // Check if user's public key exists in the nostr.json
      const nostrJsonResponse = await fetch("/.well-known/nostr.json");
      if (!nostrJsonResponse.ok) {
        throw new Error(
          "Failed to fetch nostr.json: " + nostrJsonResponse.statusText
        );
      }
      const nostrJson = await nostrJsonResponse.json();
      console.log("nostrJson object:", nostrJson);

      // Extract the username from the NIP-05 identifier
      const nip05Username = nip05.split("@")[0];

      if (nostrJson.names[nip05Username] === user.pubkey) {
        // User exists in nostr.json, proceed with further authentication or actions
        console.log("User authenticated successfully.");
        localStorage.setItem("nip05Username", nip05Username);
        // Redirect or show UI for file upload
        showFileUploadUI();
      } else {
        console.log("User not found in the authentication database.");
        alert("User not found in the authentication database.");
      }
    } else {
      console.log("User information not available from signer.");
    }
  } catch (error) {
    console.error("Error during authentication:", error);
    alert("Error during authentication: " + error.message);
  }
}

function showFileUploadUI() {
  // Clear any existing content
  document.body.innerHTML = "";

  // Create file input element
  const fileInput = document.createElement("input");
  fileInput.type = "file";
  fileInput.addEventListener("change", handleFileSelect);

  // Create submit button
  const submitButton = document.createElement("button");
  submitButton.textContent = "Upload";
  submitButton.addEventListener("click", handleUpload);

  // Append elements to the body
  document.body.appendChild(fileInput);
  document.body.appendChild(submitButton);
}

function handleFileSelect(event) {
  const selectedFile = event.target.files[0];
  console.log("Selected file:", selectedFile);
}

const serverUrl = "http://localhost:34537"; // Adjust the port as needed

async function handleUpload() {
  const fileInput = document.querySelector('input[type="file"]');
  const selectedFile = fileInput.files[0];
  const nip05Username = localStorage.getItem("nip05Username");

  const formData = new FormData();
  formData.append("file", selectedFile);

  try {
    const response = await fetch(
      `${serverUrl}/upload?nip05Username=${nip05Username}`,
      {
        method: "POST",
        body: formData,
      }
    );

    if (response.ok) {
      const data = await response.json();
      console.log("File uploaded successfully:", data);
      // Handle success
    } else {
      const errorMessage = await response.text(); // Get error message from response
      console.error("Error uploading file. Server response:", errorMessage);
      // Handle error
    }
  } catch (error) {
    console.error("Error uploading file:", error);
    // Handle network errors
  }
}