feat: add map with peers to info page (#398)

* feat: fetch and process map data DB

* feat: add map

* feat: nodes-db should be sorted alphabetically by key

utils/update-map-data.js

@@ -0,0 +1,54 @@
+#!/usr/bin/env node
+
+const axios = require('axios')
+const fs = require('fs')
+const getMapJSON = require('dotted-map').getMapJSON
+
+const DATA_SOURCE = 'https://swarmscan-api.resenje.org/v1/network/dump'
+const DATA_DESTINATION = './src/assets/data/nodes-db.json'
+const MAP_HEIGHT = 50
+const MAP_DESTINATION = './src/assets/data/map-data.json'
+
+async function getData(url) {
+  const res = await axios.get(url)
+
+  return res.data
+}
+
+function processData(data) {
+  const db = new Map()
+  data.nodes.forEach(node => {
+    db.set(node.overlay, { lat: node.location.latitude, lng: node.location.longitude })
+  })
+
+  return Object.fromEntries([...db.entries()].sort())
+}
+
+function saveFile(db, path) {
+  return fs.writeFileSync(path, JSON.stringify(db, null, 2))
+}
+
+function preComputeMap() {
+  return getMapJSON({ height: MAP_HEIGHT, grid: 'diagonal' })
+}
+
+async function main() {
+  console.log('Fetching DB data')
+  const dataDump = await getData(DATA_SOURCE)
+
+  console.log('Processing DB data')
+  const db = processData(dataDump)
+
+  console.log('Saving DB data')
+  saveFile(db, DATA_DESTINATION)
+
+  console.log('Pre-computing the word map')
+  const map = preComputeMap()
+
+  console.log('Saving map data')
+  saveFile(map, MAP_DESTINATION)
+
+  console.log('Done')
+}
+
+main()