Deleting a resource example

In this example we show how to soft- and hard-delete a resource.

Show code

var DataPeps = require("datapeps-sdk");

global["TextEncoder"] = require("text-encoding").TextEncoder;
global["TextDecoder"] = require("text-encoding").TextDecoder;

global.fetch = require("node-fetch");
global.Headers = global.fetch.Headers;

async function main() {
  let aliceLogin = "aliceliddell";
  let bobLogin = "bobmorane";
  let charlieLogin = "charliebucket";

  // Alice logs in
  let aliceSession = await DataPeps.Session.login(aliceLogin, "aliceP@ssw0rd");

  // Alice creates a resource for herself, Bob and Charlie
  let resource = await new DataPeps.ResourceAPI(aliceSession).create(
    "text",
    null,
    [aliceLogin, bobLogin, charlieLogin]
  );

  // Alice gets the resource
  await new DataPeps.ResourceAPI(aliceSession).get(resource.id);
  console.log("Alice gets the resource");

  // Bob logs in
  let bobSession = await DataPeps.Session.login(bobLogin, "bobP@ssw0rd");

  // Bob gets the resource
  let bobResource = await new DataPeps.ResourceAPI(bobSession).get(resource.id);
  console.log("Bob gets the resource");

  // Charlie logs in
  let charlieSession = await DataPeps.Session.login(
    charlieLogin,
    "charlieP@ssw0rd"
  );

  // Charlie gets the resource
  let charlieResource = await new DataPeps.ResourceAPI(charlieSession).get(
    resource.id
  );

  // Bob tries to hard-delete the resource
  let errorOccurred = false;
  try {
    await new DataPeps.ResourceAPI(bobSession).delete(resource.id);
  } catch (e) {
    if (
      e instanceof DataPeps.Error &&
      e.kind === DataPeps.ServerError.ResourceNotFound
    ) {
      console.log(
        "Bob cannot delete a resource as he is not the resource owner"
      );
      errorOccurred = true;
    } else throw e;
  }
  if (!errorOccurred) {
    throw "ERROR: Bob could hard-delete the resource";
  }

  // Bob soft-deletes (unlinks) a resource
  await new DataPeps.ResourceAPI(bobSession).unlink(resource.id);
  console.log("Bob soft-deletes the resource");

  // Bob cannot get the resource anymore
  errorOccurred = false;
  try {
    bobResource = await new DataPeps.ResourceAPI(bobSession).get(resource.id);
  } catch (e) {
    if (
      e instanceof DataPeps.Error &&
      e.kind === DataPeps.ServerError.ResourceNotFound
    ) {
      console.log("Bob cannot get a resource as he has soft-deleted it");
      errorOccurred = true;
    } else throw e;
  }
  if (!errorOccurred) {
    throw "ERROR: Bob could get a soft-deleted resource";
  }

  // Charlie can still get the resource
  charlieResource = await new DataPeps.ResourceAPI(charlieSession).get(
    resource.id
  );

  // Alice, as the resource owner, hard-deletes the resource
  await new DataPeps.ResourceAPI(aliceSession).delete(resource.id);

  // Charlie cannot get the resource anymore
  errorOccurred = false;
  try {
    charlieResource = await new DataPeps.ResourceAPI(charlieSession).get(
      resource.id
    );
  } catch (e) {
    if (
      e instanceof DataPeps.Error &&
      e.kind === DataPeps.ServerError.ResourceNotFound
    ) {
      console.log("Charlie cannot get a hard-deleted resource");
      errorOccurred = true;
    } else throw e;
  }
  if (!errorOccurred) {
    throw "ERROR: Charlie could get a hard-deleted resource";
  }

  // Alice cannot get the resource anymore
  errorOccurred = false;
  try {
    aliceResource = await new DataPeps.ResourceAPI(aliceSession).get(
      resource.id
    );
  } catch (e) {
    if (
      e instanceof DataPeps.Error &&
      e.kind === DataPeps.ServerError.ResourceNotFound
    ) {
      console.log("Alice cannot get a hard-deleted resource");
      errorOccurred = true;
    } else throw e;
  }
  if (!errorOccurred) {
    throw "ERROR: Alice could get a hard-deleted resource";
  }
}

main().catch(e => console.log("An error occurred: ", e));

Running the example

Before running the example make sure you followed the steps described here.

To fetch the code run the following command in the examples directory:

git clone https://gist.github.com/e1e4cd0f040762c38698c480e3bb6e8f.git deleting-a-resource

To run this example execute the following command in the examples directory:

node deleting-a-resource/deleting-a-resource.js