quackscape/assets/js/editor.js

import { getScene, getSceneElement, getCategory } from "./api";
import { populateDestinationDropdown } from "./editor/teleport";

import "../css/editor.css";

let clickTimestamp = 0;

// Function to get the CSRF token cookie
function getCookie(name) {
  let cookieValue = null;
  if (document.cookie && document.cookie !== "") {
    const cookies = document.cookie.split(";");
    for (let i = 0; i < cookies.length; i++) {
      const cookie = cookies[i].trim();
      if (cookie.substring(0, name.length + 1) === name + "=") {
        cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
        break;
      }
    }
  }
  return cookieValue;
}

// Find parent quackscape-scene for ID
function findParentScene(element) {
  var parent = element.parentElement;

  while (parent.tagName != "QUACKSCAPE-SCENE") {
    parent = parent.parentElement;
  }

  return parent;
}

// Distinguishing clicks from drags based on duration.
// TODO: Find a better way to distinguish these.
function addEventListeners(element) {
  element.addEventListener("mousedown", function (event) {
    clickTimestamp = event.timeStamp;
  });

  element.addEventListener("mouseup", function (event) {
    if (event.timeStamp - clickTimestamp > 200) {
      // Ignoring this, we only handle regular short clicks.
      // TODO: Find a way to handle drags of elements
      return;
    } else {
      handleClick(event);
    }

    // Right-clicks are definitely intentional.
    element.addEventListener("contextmenu", function (event) {
      handleClick(event);
    });
  });
}

// Open a modal for creating a new Element
function startCreateElement(event) {
  var propertiesTitle = document.getElementById("propertiesTitle");
  modalLabel.textContent = "Create Element";

  var propertiesContent = document.getElementById("propertiesContent");

  var thetaStart = cartesianToTheta(
    event.detail.intersection.point.x,
    event.detail.intersection.point.z
  );

  modalContent.innerHTML = `<b>Creating element at:</b><br/>
  X: ${event.detail.intersection.point.x}<br/>
  Y: ${event.detail.intersection.point.y}<br/>
  Z: ${event.detail.intersection.point.z}<br/>
  Calculated Theta: ${thetaStart}<br/>

  Parent Element Type: ${event.srcElement.tagName}<br/>
  <hr/>
  
  <form id="newElementForm">
    <label for="resourcetype" class="form-label">Element Type</label>
    <select class="form-control" aria-label="Element Type" id="resourcetype">
      <option selected>Select Element Type</option>
      <option value="MarkerElement">Marker</option>
      <option value="ImageElement">Image</option>
      <option value="ImageElement">Teleport</option>
    </select>
  </form>
  `;
}

function startModifyElement(event) {
  var propertiesTitle = document.getElementById("propertiesTitle");
  propertiesTitle.textContent = "Modify Element";

  // Get element from API
  var scene = findParentScene(event.target);

  var element_data_request = getSceneElement(
    scene.getAttribute("id"),
    event.target.getAttribute("id")
  );

  element_data_request.then((element_data) => {
    var propertiesContent = document.getElementById("propertiesContent");

    propertiesContent.innerHTML = `<b>Modifying element:</b><br/>
    Element Type: ${event.srcElement.tagName}<br/>
    Element ID: ${event.target.getAttribute("id")}<br/>
    Element data: ${JSON.stringify(element_data.obj)}<br/>
    <hr/>
    
    <form id="modifyElementForm">
      <input type="hidden" id="csrfmiddlewaretoken" value="${getCookie(
        "csrftoken"
      )}">
      <input type="hidden" id="id" value="${event.target.getAttribute("id")}">
      <div class="dropdown mb-2">
        <label for="destinationDropdownSearch" class="form-label">Teleport Destination</label>
        <input class="form-control" autocomplete="off" id="destinationDropdownSearch" type="text" placeholder="Search...">
        <input type="hidden" id="destination">
        <div class="dropdown-menu" id="destinationDropdownMenu">
          <!-- Dropdown items will be populated here by JavaScript -->
        </div>
      </div>

      <div class="mb-2">
        <label for="destination_x" class="form-label">Destination X/Y/Z Rotation</label>
          <div class="row g-2">
            <div class="col">
              <input type="number" class="form-control" id="destination_x" name="input1" min="0" max="360" placeholder="X">
            </div>
            <div class="col">
              <input type="number" class="form-control" id="destination_y" name="input2" min="0" max="360" placeholder="Y">
            </div>
            <div class="col">
              <input type="number" class="form-control" id="destination_z" name="input3" min="0" max="360" placeholder="Z">
            </div>
          </div>
        </div>
      </div>

      <div class="mb-2">
        <label for="elementUpload" class="form-label">Marker image</label>
        <input id="elementUpload" type="file" class="form-control">
      </div>

    </form>
    `;

    var scene_data_request = getScene(scene.getAttribute("id"));
    scene_data_request.then((scene_data) => {
      var category_data_request = getCategory(scene_data.obj.category);

      category_data_request.then((category_data) => {
        populateDestinationDropdown(
          element_data.obj.destination,
          category_data
        );
      });
    });

    document
      .getElementById("elementUpload")
      .addEventListener("change", function () {
        if (this.files && this.files[0]) {
          var reader = new FileReader();

          reader.onload = function (e) {
            // Set the image to the file contents
            if (event.target.getAttribute("data-original-src") == undefined) {
              event.target.setAttribute(
                "data-original-src",
                event.target.getAttribute("src")
              );
            }
            event.target.setAttribute("src", e.target.result);
          };
          reader.readAsDataURL(this.files[0]);
        }
      });

    if (element_data.obj.destination_x != -1) {
      document.getElementById("destination_x").value =
        element_data.obj.destination_x;
    }
    if (element_data.obj.destination_y != -1) {
      document.getElementById("destination_y").value =
        element_data.obj.destination_y;
    }
    if (element_data.obj.destination_z != -1) {
      document.getElementById("destination_z").value =
        element_data.obj.destination_z;
    }

    document.getElementById("resetButton").style = "display: inline;";
    document.getElementById("buttons").style = "display: block;";
  });
}

function cartesianToTheta(x, z) {
  // Calculate the angle in radians
  let angleRadians = Math.atan2(z, x);

  // Convert to degrees
  let angleDegrees = angleRadians * (180 / Math.PI);

  // A-Frame's thetaStart is measured from the positive X-axis ("right" direction)
  // and goes counter-clockwise, so this should directly give us the thetaStart value.
  let thetaStart = 90 - angleDegrees;

  // Since atan2 returns values from -180 to 180, let's normalize this to 0 - 360
  thetaStart = thetaStart < 0 ? thetaStart + 360 : thetaStart;

  return thetaStart;
}

function latLonToXYZ(lat, lon, radius = 5) {
  // Convert lat/lon to X/Y/Z coordinates on the sphere
  const phi = (90 - lat) * (Math.PI / 180);
  const theta = (lon + 180) * (Math.PI / 180);

  const x = -(radius * Math.sin(phi) * Math.cos(theta));
  const y = radius * Math.cos(phi);
  const z = radius * Math.sin(phi) * Math.sin(theta);

  return { x, y, z };
}

function handleClick(event) {
  // If clicked on the sky, start creating a new element
  if (event.target.tagName == "A-SKY") {
    startCreateElement(event);
  } else {
    // Else we are modifying an existing element
    startModifyElement(event);
  }
}

document.addEventListener("loadedQuackscapeScene", function (event) {
  // Get the scene
  var scene = document.querySelector("a-scene");

  // Get all children
  var children = scene.children;

  for (var i = 0; i < children.length; i++) {
    var child = children[i];

    if (child.tagName.startsWith("A-")) {
      // Remove original onclick events
      if (child.hasAttribute("onclick")) {
        child.removeAttribute("onclick");
      }

      // Add new event listeners
      addEventListeners(child);

      // Add click-drag component to all a-entity elements
      child.setAttribute("click-drag", "");
    }
  }
});