dawarich/app/javascript/maps/helpers.js

// javascript/maps/helpers.js
export function formatDistance(distance, unit = 'km') {
  let smallUnit, bigUnit;

  if (unit === 'mi') {
    distance *= 0.621371; // Convert km to miles
    smallUnit = 'ft';
    bigUnit = 'mi';

    // If the distance is less than 1 mile, return it in feet
    if (distance < 1) {
      distance *= 5280; // Convert miles to feet
      return `${distance.toFixed(2)} ${smallUnit}`;
    } else {
      return `${distance.toFixed(2)} ${bigUnit}`;
    }
  } else {
    smallUnit = 'm';
    bigUnit = 'km';

    // If the distance is less than 1 km, return it in meters
    if (distance < 1) {
      distance *= 1000; // Convert km to meters
      return `${distance.toFixed(2)} ${smallUnit}`;
    } else {
      return `${distance.toFixed(2)} ${bigUnit}`;
    }
  }
}

export function getUrlParameter(name) {
  return new URLSearchParams(window.location.search).get(name);
}

export function minutesToDaysHoursMinutes(minutes) {
  const days = Math.floor(minutes / (24 * 60));
  const hours = Math.floor((minutes % (24 * 60)) / 60);
  minutes = minutes % 60;
  let result = "";

  if (days > 0) {
    result += `${days}d `;
  }

  if (hours > 0) {
    result += `${hours}h `;
  }

  if (minutes > 0) {
    result += `${minutes}min`;
  }

  return result;
}

export function formatDate(timestamp, timezone) {
  const date = new Date(timestamp * 1000);
  return date.toLocaleString("en-GB", { timeZone: timezone });
}

export function haversineDistance(lat1, lon1, lat2, lon2, unit = 'km') {
  // Haversine formula to calculate the distance between two points
  const toRad = (x) => (x * Math.PI) / 180;
  const R_km = 6371; // Radius of the Earth in kilometers
  const R_miles = 3959; // Radius of the Earth in miles
  const dLat = toRad(lat2 - lat1);
  const dLon = toRad(lon2 - lon1);
  const a =
    Math.sin(dLat / 2) * Math.sin(dLat / 2) +
    Math.cos(toRad(lat1)) * Math.cos(toRad(lat2)) *
    Math.sin(dLon / 2) * Math.sin(dLon / 2);
  const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));

  if (unit === 'miles') {
    return R_miles * c; // Distance in miles
  } else {
    return R_km * c; // Distance in kilometers
  }
}

export function showFlashMessage(type, message) {
  // Create the outer flash container div
  const flashDiv = document.createElement('div');
  flashDiv.setAttribute('data-controller', 'removals');
  flashDiv.className = `flex items-center fixed top-5 right-5 ${classesForFlash(type)} py-3 px-5 rounded-lg`;

  // Create the message div
  const messageDiv = document.createElement('div');
  messageDiv.className = 'mr-4';
  messageDiv.innerText = message;

  // Create the close button
  const closeButton = document.createElement('button');
  closeButton.setAttribute('type', 'button');
  closeButton.setAttribute('data-action', 'click->removals#remove');

  // Create the SVG icon for the close button
  const closeIcon = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
  closeIcon.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
  closeIcon.setAttribute('class', 'h-6 w-6');
  closeIcon.setAttribute('fill', 'none');
  closeIcon.setAttribute('viewBox', '0 0 24 24');
  closeIcon.setAttribute('stroke', 'currentColor');

  const closeIconPath = document.createElementNS('http://www.w3.org/2000/svg', 'path');
  closeIconPath.setAttribute('stroke-linecap', 'round');
  closeIconPath.setAttribute('stroke-linejoin', 'round');
  closeIconPath.setAttribute('stroke-width', '2');
  closeIconPath.setAttribute('d', 'M6 18L18 6M6 6l12 12');

  // Append the path to the SVG
  closeIcon.appendChild(closeIconPath);
  // Append the SVG to the close button
  closeButton.appendChild(closeIcon);

  // Append the message and close button to the flash div
  flashDiv.appendChild(messageDiv);
  flashDiv.appendChild(closeButton);

  // Append the flash message to the body or a specific flash container
  document.body.appendChild(flashDiv);

  // Optional: Automatically remove the flash message after 5 seconds
  setTimeout(() => {
    flashDiv.remove();
  }, 5000);
}

function classesForFlash(type) {
  switch (type) {
    case 'error':
      return 'bg-red-100 text-red-700 border-red-300';
    case 'notice':
      return 'bg-blue-100 text-blue-700 border-blue-300';
    default:
      return 'bg-blue-100 text-blue-700 border-blue-300';
  }
}