From 60f3d858c9243aa38a8940b6645f0b615bf6cdfc Mon Sep 17 00:00:00 2001
From: Russ Garrett <russ@garrett.co.uk>
Date: Thu, 23 May 2024 21:04:51 +0100
Subject: [PATCH] Add vehicle tracking layer

---
 web/public/sdf/cherrypicker.png | Bin 0 -> 1455 bytes
 web/public/sdf/golf-buggy.png   | Bin 0 -> 3155 bytes
 web/public/sdf/parking.png      | Bin 0 -> 1518 bytes
 web/public/sdf/telehandler.png  | Bin 0 -> 3623 bytes
 web/src/index.ts                |  41 ++++++++++++++++++++++---
 web/src/style/map_style.ts      |  52 ++++++++++++++++++++++++++++++++
 6 files changed, 89 insertions(+), 4 deletions(-)
 create mode 100644 web/public/sdf/cherrypicker.png
 create mode 100644 web/public/sdf/golf-buggy.png
 create mode 100644 web/public/sdf/parking.png
 create mode 100644 web/public/sdf/telehandler.png

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new file mode 100644
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literal 0
HcmV?d00001

diff --git a/web/src/index.ts b/web/src/index.ts
index 0692fea..1fbabdb 100644
--- a/web/src/index.ts
+++ b/web/src/index.ts
@@ -8,7 +8,7 @@ import URLHash from '@russss/maplibregl-layer-switcher/urlhash'
 import DistanceMeasure from './distancemeasure'
 import ContextMenu from './contextmenu'
 import VillagesEditor from './villages'
-import { roundPosition } from './util'
+import { roundPosition, fetchWithTimeout } from './util'
 import InstallControl from './installcontrol'
 import ExportControl from './export/export'
 import { manifest } from 'virtual:render-svg'
@@ -33,14 +33,40 @@ async function loadIcons(map: maplibregl.Map) {
             })
             .map((f) => f())
     )
-    /*
-    const sdfs = ['parking']
+
+    const sdfs = ['telehandler', 'golf-buggy', 'cherrypicker']
 
     for (const sdf of sdfs) {
         const img = await map.loadImage(`/sdf/${sdf}.png`)
         map.addImage(sdf, img.data, { sdf: true })
     }
-    */
+}
+
+let lastSuccessfulFetch = 0
+
+function updateVehicles(map: maplibregl.Map) {
+    if (map.getLayer('vehicles')?.visibility == 'none') return
+
+    fetchWithTimeout('https://geojson.thinkl33t.co.uk/')
+        .then((response) => response.json())
+        .then((data) => {
+            const source = map.getSource('vehicles') as maplibregl.GeoJSONSource
+            if (!source) return
+            source.setData(data)
+            lastSuccessfulFetch = Date.now()
+        })
+        .catch((error) => {
+            console.error(error)
+            if (Date.now() - lastSuccessfulFetch < 60000) return
+            const source = map.getSource('vehicles') as maplibregl.GeoJSONSource
+            if (!source) return
+            source.setData({ type: 'FeatureCollection', features: [] })
+        })
+}
+
+function initVehicles(map: maplibregl.Map) {
+    window.setTimeout(() => updateVehicles(map), 0)
+    window.setInterval(() => updateVehicles(map), 20000)
 }
 
 class EventMap {
@@ -58,6 +84,7 @@ class EventMap {
         Power: 'power_',
         Lighting: 'lighting_',
         Villages: 'villages_',
+        'Vehicle tracking': 'vehicles',
     }
     map?: maplibregl.Map
     layer_switcher?: LayerSwitcher
@@ -142,6 +169,12 @@ class EventMap {
             const [lng, lat] = roundPosition([coords.lng, coords.lat], this.map!.getZoom())
             navigator.clipboard.writeText(lat + ', ' + lng)
         })
+
+        initVehicles(this.map)
+
+        this.map.on('styledata', () => {
+            updateVehicles(this.map!)
+        })
     }
 }
 
diff --git a/web/src/style/map_style.ts b/web/src/style/map_style.ts
index 9d128da..e11f347 100644
--- a/web/src/style/map_style.ts
+++ b/web/src/style/map_style.ts
@@ -975,6 +975,54 @@ const layers: LayerSpecificationWithZIndex[] = [
         },
         paint: {},
     },
+    {
+        id: 'vehicles',
+        type: 'symbol',
+        source: 'vehicles',
+        minzoom: 14,
+        filter: ['match', ['get', 'icon'], ['telehandler', 'cherrypicker', 'golf-buggy'], true, false],
+        layout: {
+            'icon-image': [
+                'match',
+                ['get', 'icon'],
+                'telehandler',
+                'telehandler',
+                'cherrypicker',
+                'cherrypicker',
+                'golf-buggy',
+            ],
+            'icon-size': ['interpolate', ['linear'], ['zoom'], 14, 0.1, 24, 1],
+            'icon-allow-overlap': true,
+            'text-field': '{name}',
+            'text-font': ['Open Sans Regular'],
+            'text-size': ['step', ['zoom'], 0, 17, 12],
+            'text-optional': true,
+            'text-offset': [
+                'interpolate',
+                ['linear'],
+                ['zoom'],
+                17,
+                ['literal', [0, 2]],
+                24,
+                ['literal', [0, 6]],
+            ],
+        },
+        paint: {
+            'icon-color': [
+                'match',
+                ['get', 'icon'],
+                'cherrypicker',
+                'rgba(100, 100, 255, 1)',
+                'golf-buggy',
+                'rgba(100, 100, 100, 1)',
+                'rgba(255, 50, 50, 1)',
+            ],
+            'icon-halo-color': 'rgba(30, 30, 30, 1)',
+            'icon-halo-width': ['step', ['zoom'], 0, 17.4, 2],
+            'text-halo-color': 'rgba(255, 255, 255, 1)',
+            'text-halo-width': 2,
+        },
+    },
     {
         id: 'villages_text',
         type: 'symbol',
@@ -1160,6 +1208,10 @@ const style: StyleSpecification = {
             type: 'raster',
             tiles: ['https://map.emfcamp.org/data/ortho/{z}/{x}/{y}'],
         },
+        vehicles: {
+            type: 'geojson',
+            data: { type: 'FeatureCollection', features: [] },
+        },
     },
     sprite: 'https://openmaptiles.github.io/positron-gl-style/sprite',
     glyphs: 'https://map.emfcamp.org/fonts/{fontstack}/{range}.pbf',