merge: Address technical dept in topology view (#162)

This pull request aims to address some of the technical debt in the topology 
view of the OpenDC frontend.

* Add support for panning of the datacenter topology
* Isolate world coordinate space (world objects do not depend on camera scale or position)
* Split transpiled modules into a separate chunk to reduce deduplication
* Encode state in topology actions to reduce global state
* Restructure components per page
* Enable more ESLint rules through `eslint:recommended` ruleset
* Move page components in separate files.

1 files changed, 68 insertions, 0 deletions

diff --git a/opendc-web/opendc-web-ui/src/components/topologies/map/elements/RackFillBar.js b/opendc-web/opendc-web-ui/src/components/topologies/map/elements/RackFillBar.js
new file mode 100644
index 00000000..aa284944
--- /dev/null
+++ b/opendc-web/opendc-web-ui/src/components/topologies/map/elements/RackFillBar.js
@@ -0,0 +1,68 @@
+import PropTypes from 'prop-types'
+import React from 'react'
+import { Group, Rect } from 'react-konva'
+import {
+    RACK_ENERGY_BAR_BACKGROUND_COLOR,
+    RACK_ENERGY_BAR_FILL_COLOR,
+    RACK_SPACE_BAR_BACKGROUND_COLOR,
+    RACK_SPACE_BAR_FILL_COLOR,
+} from '../../../../util/colors'
+import {
+    OBJECT_BORDER_WIDTH_IN_PIXELS,
+    OBJECT_MARGIN_IN_PIXELS,
+    RACK_FILL_ICON_OPACITY,
+    RACK_FILL_ICON_WIDTH,
+    TILE_SIZE_IN_PIXELS,
+} from '../MapConstants'
+import ImageComponent from './ImageComponent'
+
+function RackFillBar({ positionX, positionY, type, fillFraction }) {
+    const halfOfObjectBorderWidth = OBJECT_BORDER_WIDTH_IN_PIXELS / 2
+    const x =
+        positionX * TILE_SIZE_IN_PIXELS +
+        OBJECT_MARGIN_IN_PIXELS +
+        (type === 'space' ? halfOfObjectBorderWidth : 0.5 * (TILE_SIZE_IN_PIXELS - 2 * OBJECT_MARGIN_IN_PIXELS))
+    const startY = positionY * TILE_SIZE_IN_PIXELS + OBJECT_MARGIN_IN_PIXELS + halfOfObjectBorderWidth
+    const width = 0.5 * (TILE_SIZE_IN_PIXELS - OBJECT_MARGIN_IN_PIXELS * 2) - halfOfObjectBorderWidth
+    const fullHeight = TILE_SIZE_IN_PIXELS - OBJECT_MARGIN_IN_PIXELS * 2 - OBJECT_BORDER_WIDTH_IN_PIXELS
+
+    const fractionHeight = fillFraction * fullHeight
+    const fractionY =
+        (positionY + 1) * TILE_SIZE_IN_PIXELS - OBJECT_MARGIN_IN_PIXELS - halfOfObjectBorderWidth - fractionHeight
+
+    return (
+        <Group>
+            <Rect
+                x={x}
+                y={startY}
+                width={width}
+                height={fullHeight}
+                fill={type === 'space' ? RACK_SPACE_BAR_BACKGROUND_COLOR : RACK_ENERGY_BAR_BACKGROUND_COLOR}
+            />
+            <Rect
+                x={x}
+                y={fractionY}
+                width={width}
+                height={fractionHeight}
+                fill={type === 'space' ? RACK_SPACE_BAR_FILL_COLOR : RACK_ENERGY_BAR_FILL_COLOR}
+            />
+            <ImageComponent
+                src={'/img/topology/rack-' + type + '-icon.png'}
+                x={x + width * 0.5 - RACK_FILL_ICON_WIDTH * 0.5}
+                y={startY + fullHeight * 0.5 - RACK_FILL_ICON_WIDTH * 0.5}
+                width={RACK_FILL_ICON_WIDTH}
+                height={RACK_FILL_ICON_WIDTH}
+                opacity={RACK_FILL_ICON_OPACITY}
+            />
+        </Group>
+    )
+}
+
+RackFillBar.propTypes = {
+    positionX: PropTypes.number.isRequired,
+    positionY: PropTypes.number.isRequired,
+    type: PropTypes.string.isRequired,
+    fillFraction: PropTypes.number.isRequired,
+}
+
+export default RackFillBar