1 files changed, 105 insertions, 0 deletions
diff --git a/src/map/core/mapUtil.js b/src/map/core/mapUtil.js
new file mode 100644
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--- /dev/null
+++ b/src/map/core/mapUtil.js
@@ -0,0 +1,105 @@
+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;
+    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 && typeof it[0] === 'number' && typeof it[1] === 'number') {
+      return [it[1], it[0]];
+    }
+    return it.map((it) => reverseCoordinates(it));
+  }
+  return {
+    ...it,
+    coordinates: reverseCoordinates(it.coordinates),
+  };
+};
+
+export const geofenceToFeature = (theme, item) => {
+  let geometry;
+  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);
+    geometry = polygon.geometry;
+  } else {
+    geometry = reverseCoordinates(parse(item.area));
+  }
+  return {
+    id: item.id,
+    type: 'Feature',
+    geometry,
+    properties: {
+      name: item.name,
+      color: item.attributes.color || theme.palette.geometry.main,
+    },
+  };
+};
+
+export const geometryToArea = (geometry) => stringify(reverseCoordinates(geometry));
+
+export const findFonts = (map) => {
+  const fontSet = new Set();
+  const { layers } = map.getStyle();
+  layers?.forEach?.((layer) => {
+    layer.layout?.['text-font']?.forEach?.(fontSet.add, fontSet);
+  });
+  const availableFonts = [...fontSet];
+  const regularFont = availableFonts.find((it) => it.includes('Regular'));
+  if (regularFont) {
+    return [regularFont];
+  }
+  const anyFont = availableFonts.find(Boolean);
+  if (anyFont) {
+    return [anyFont];
+  }
+  return ['Roboto Regular'];
+};