init 🚀

src/graph-utils.js

@@ -0,0 +1,49 @@
+export const isEdge = element => element.data.source && element.data.target;
+
+export const separateElements = elements => ({
+  nodes: elements.filter(e => !isEdge(e)),
+  edges: elements.filter(e => isEdge(e))
+});
+
+export const getBoundingBox = (nodes) => {
+  const bbox = nodes.reduce((res, node) => {
+    const x2 = node.position.x + node.data.__width;
+    const y2 = node.position.y + node.data.__height;
+
+    if (node.position.x < res.minX) {
+      res.minX = node.position.x;
+    }
+
+    if (x2 > res.maxX) {
+      res.maxX = x2;
+    }
+
+    if (node.position.y < res.minY) {
+      res.minY = node.position.y;
+    }
+
+    if (y2 > res.maxY) {
+      res.maxY = y2;
+    }
+
+    return res;
+  }, {
+    minX: Number.MAX_VALUE,
+    minY: Number.MAX_VALUE,
+    maxX: 0,
+    maxY: 0
+  });
+
+  return {
+    x: bbox.minX,
+    y: bbox.minY,
+    width: bbox.maxX - bbox.minX,
+    height: bbox.maxY - bbox.minY
+  };
+};
+
+export default {
+  isEdge,
+  separateElements,
+  getBoundingBox
+};