async function getLabelData()

in examples-vite/layers/label/base.ts [72:124]
51 lines of code
12 McCabe index (conditional complexity)

async function getLabelData() {
	const urls = await fetch('https://fbi-geography.oss-cn-hangzhou.aliyuncs.com/urls.json')
	const { base_url, uris, adcode_placeholder } = await urls.json()
	const res = await fetch(base_url + uris.all_100000_json)
	const geoJsonData = await res.json()

	const countryRegion = { ...geoJsonData, features: [] }
	const regionsRegion = { ...geoJsonData, features: [] }
	const provinceRegion = { ...geoJsonData, features: [] }
	const cityRegion = { ...geoJsonData, features: [] }
	const districtRegion = { ...geoJsonData, features: [] }
	geoJsonData.features.forEach((feature) => {
		const level = feature.properties.level
		const adcode = feature.properties.adcode
		if (adcode === '100000') {
			countryRegion.features.push(feature)
			return
		}
		if (new Set(['region', 'province', 'city', 'district']).has(level)) {
			if (level === 'region') {
				regionsRegion.features.push(feature)
			} else if (level === 'province') {
				provinceRegion.features.push(feature)
			} else if (level === 'city') {
				cityRegion.features.push(feature)
			} else if (level === 'district') {
				districtRegion.features.push(feature)
			}
		}
	})

	const labels: any[] = []
	for (let i = 0; i < provinceRegion.features.length; i++) {
		const feature = provinceRegion.features[i]
		const properties = feature.properties
		if (!properties) continue
		let center
		if (properties.centroid) {
			center = properties.centroid
		} else if (Array.isArray(properties.center)) {
			center = properties.center
		} else if (typeof properties.center === 'string') {
			center = properties.center.split(',').map((v) => parseFloat(v))
		}
		labels.push({
			lng: center[0],
			lat: center[1],
			name: `${properties?.name}  ${Math.random().toFixed(5)}` ?? '',
			feature: feature,
		})
	}
	return labels
}