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| import stableStringify from 'json-stable-stringify'
import {autocomplete as mapzenAutocomplete, reverse as reverseSearch} from 'isomorphic-mapzen-search'
import isEqual from 'lodash/isEqual'
import throttle from 'lodash/throttle'
import PropTypes from 'prop-types'
import React, {Component} from 'react'
import Select from 'react-select'
const GEOLOCATE_VALUE = 'geolocate'
class Geocoder extends Component {
static propTypes = {
apiKey: PropTypes.string.isRequired,
boundary: PropTypes.object,
featureToLabel: PropTypes.func,
featureToValue: PropTypes.func,
findingLocationText: PropTypes.string,
focusPoint: PropTypes.any,
geolocate: PropTypes.bool,
onChange: PropTypes.func,
placeholder: PropTypes.string,
rateLimit: PropTypes.number,
reverseSearch: PropTypes.func,
search: PropTypes.func,
useLocationText: PropTypes.string,
value: PropTypes.object
}
static defaultProps = {
featureToLabel: (feature) => feature.properties.label,
featureToValue: (feature) => `${feature.properties.label}-${feature.geometry.coordinates.join(',')}`,
findingLocationText: 'Locating you...',
reverseSearch,
search: mapzenAutocomplete,
useLocationText: 'Use Current Location'
}
autocompleteCache = {}
options = {}
state = {
options: this.defaultOptions(),
value: this.props.value || null
}
cacheOptions (options) {
options.forEach((o) => {
this.options[o.value] = o.feature
})
}
componentWillMount () {
this._throttledLoadOptions = throttle(this.loadOptions, this.props.rateLimit || 500)
}
componentWillReceiveProps (nextProps) {
if (!isEqual(nextProps.value, this.props.value)) {
this.setState({value: nextProps.value})
}
if (this.props.rateLimit !== nextProps.rateLimit) {
this._throttledLoadOptions = throttle(this.loadOptions, this.props.rateLimit || 500)
}
}
defaultOptions () {
return this.props.geolocate && 'geolocation' in navigator
? [{label: this.props.useLocationText, value: GEOLOCATE_VALUE}]
: []
}
featureToOption = (feature) => {
const {featureToLabel, featureToValue} = this.props
return {
feature,
label: featureToLabel(feature),
value: featureToValue(feature)
}
}
focus () {
this.select.focus()
}
loadOptions = (input, callback) => {
const {apiKey, boundary, focusPoint, geolocate, search} = this.props
ifI (!input) {
if (geolocate && 'geolocation' in navigator) {
callback(null, {
options: this.defaultOptions()
})
} else {
callback(null)
}
} else {
const autocompleteQuery = {
apiKey,
boundary,
focusPoint,
text: input
}
const autocompleteQueryKey = stableStringify(autocompleteQuery)
// check if autocomplete query has been made before
const cacheValue = this.autocompleteCache[autocompleteQueryKey]
ifI (cacheValue) {
return callback(null, cacheValue)
}
search(autocompleteQuery).then((geojson) => {
const options = geojson && geojson.features
? geojson.features.map(this.featureToOption)
: []
this.cacheOptions(options)
this.autocompleteCache[autocompleteQueryKey] = {options}
callback(null, {options})
}).catch((error) => {
callback(error)
})
}
}
_onChange = (value) => {
const {apiKey, findingLocationText, onChange, reverseSearch} = this.props
if (value && value.value === GEOLOCATE_VALUE) {
this.setState({
...this.state,
value: {
label: findingLocationText
}
})
window.navigator.geolocation.getCurrentPosition((position) => {
reverseSearch({
apiKey,
point: position.coords
}).then((geojson) => {
const value = this.featureToOption(geojson.features[0])
this.setState({
...this.state,
value
})
onChange && onChange(value)
}).catch((err) => {
console.error('Error during reverse lookup of', position)
console.error(err)
const value = this.featureToOption({
type: 'Feature',
properties: {
label: `${position.longitude}, ${position.latitude}`
},
geometry: {
type: 'Point',
coordinates: [
position.longitude,
position.latitude
]
}
})
this.setState({
...this.state,
value
})
onChange && onChange(value)
})
})
} else {
if (!value) {
this.setState({
options: this.defaultOptions(),
value
})
} else {
this.setState({value})
}
this.props.onChange && this.props.onChange(value && this.options[value.value])
}
}
_saveRef = (select) => {
this.select = select
}
render () {
return (
<Select.Async
autoBlur
autoload={false}
cache={false}
filterOptions={false}
ignoreAccents={false}
ignoreCase={false}
loadOptions={this._throttledLoadOptions}
minimumInput={3}
options={this.state.options}
{...this.props}
onChange={this._onChange}
ref={this._saveRef}
value={this.state.value}
onBlurResetsInput={false}
/>
)
}
}
module.exports = Geocoder
|