Reorganize map folder

1 files changed, 90 insertions, 0 deletions

diff --git a/modern/src/map/core/mapUtil.js b/modern/src/map/core/mapUtil.js
new file mode 100644
index 00000000..2aa86c68
--- /dev/null
+++ b/modern/src/map/core/mapUtil.js
@@ -0,0 +1,90 @@
+import { parse, stringify } from 'wellknown';
+import circle from '@turf/circle';
+
+export const loadImage = (url) => new Promise((imageLoaded) => {
+  const image = new Image();
+  image.onload = () => imageLoaded(image);
+  image.src = url;
+});
+
+const canvasTintImage = (image, color) => {
+  const canvas = document.createElement('canvas');
+  canvas.width = image.width * devicePixelRatio;
+  canvas.height = image.height * devicePixelRatio;
+  canvas.style.width = `${image.width}px`;
+  canvas.style.height = `${image.height}px`;
+
+  const context = canvas.getContext('2d');
+
+  context.save();
+  context.fillStyle = color;
+  context.globalAlpha = 1;
+  context.fillRect(0, 0, canvas.width, canvas.height);
+  context.globalCompositeOperation = 'destination-atop';
+  context.globalAlpha = 1;
+  context.drawImage(image, 0, 0, canvas.width, canvas.height);
+  context.restore();
+
+  return canvas;
+};
+
+export const prepareIcon = (background, icon, color) => {
+  const canvas = document.createElement('canvas');
+  canvas.width = background.width * devicePixelRatio;
+  canvas.height = background.height * devicePixelRatio;
+  canvas.style.width = `${background.width}px`;
+  canvas.style.height = `${background.height}px`;
+
+  const context = canvas.getContext('2d');
+  context.drawImage(background, 0, 0, canvas.width, canvas.height);
+
+  if (icon) {
+    const iconRatio = 0.5;
+    const imageWidth = canvas.width * iconRatio;
+    const imageHeight = canvas.height * iconRatio;
+    if (navigator.userAgent.indexOf('Firefox') > 0) {
+      context.drawImage(icon, (canvas.width - imageWidth) / 2, (canvas.height - imageHeight) / 2, imageWidth, imageHeight);
+    } else {
+      context.drawImage(canvasTintImage(icon, color), (canvas.width - imageWidth) / 2, (canvas.height - imageHeight) / 2, imageWidth, imageHeight);
+    }
+  }
+
+  return context.getImageData(0, 0, canvas.width, canvas.height);
+};
+
+export const reverseCoordinates = (it) => {
+  if (!it) {
+    return it;
+  } if (Array.isArray(it)) {
+    if (it.length === 2 && !Number.isNaN(it[0]) && !Number.isNaN(it[1])) {
+      return [it[1], it[0]];
+    }
+    return it.map((it) => reverseCoordinates(it));
+  }
+  return {
+    ...it,
+    coordinates: reverseCoordinates(it.coordinates),
+  };
+};
+
+export const geofenceToFeature = (item) => {
+  if (item.area.indexOf('CIRCLE') > -1) {
+    const coordinates = item.area.replace(/CIRCLE|\(|\)|,/g, ' ').trim().split(/ +/);
+    const options = { steps: 32, units: 'meters' };
+    const polygon = circle([Number(coordinates[1]), Number(coordinates[0])], Number(coordinates[2]), options);
+    return {
+      id: item.id,
+      type: 'Feature',
+      geometry: polygon.geometry,
+      properties: { name: item.name },
+    };
+  }
+  return {
+    id: item.id,
+    type: 'Feature',
+    geometry: reverseCoordinates(parse(item.area)),
+    properties: { name: item.name },
+  };
+};
+
+export const geometryToArea = (geometry) => stringify(reverseCoordinates(geometry));