Vue Autosuggest Autocomplete Select From Multiple Source

August 24, 2018

Data Source from REST Api and Google Places

I want to build an autocomplete select/dropdown using vue-autosuggest from 2 sources: Google Places and REST API.

vue-autosuggest is not the most popular ones, but it is actively developed for the last 12 months. I am using version 1.4.3 (18 Jul 2018).

Install

Install vue-autosuggest (for autocomplete dropdown) and axios (for calling REST Api)

npm install --save vue-autosuggest
npm install --save axios

PlacePicker Component

I created a vue component: PlacePicker.vue.

vue-autosuggest has 3 sources: REST Api, Google Places Library - PlacesService.findPlaceFromQuery and AutocompleteService.getPlacePredictions
Suggestions from AutocompleteService.getPlacePredictions is used to trigger a search when selected
Google Map is loaded below vue-autosuggest, and marker is shown (and panTo) when a place is selected (from REST Api or Google Places Library).
Refer to Google Maps/Places Get API Key.
Replace travelopy with your own REST Api.
Refer to code for loadScript

NOTE: Take note of Places API Policies

<template>
  <form>
    <vue-autosuggest
        :suggestions="suggestions"
        :inputProps="inputProps"
        :sectionConfigs="sectionConfigs"
        :renderSuggestion="renderSuggestion"
        :getSuggestionValue="getSuggestionValue"
        ref="autocomplete" />

    <div id="map" style="height: 300px;"></div>
  </form>
</template>  

<script>
import Vue from 'vue'
import axios from 'axios'

let googleMapPromise = null
let map = null
let placeService = null
let autocompleteService = null
let timeout = null
let marker = null

export default {
  name: 'PlacePicker',
  props: ['query'],
  data() {
    GOOGLE_API_KEY: '<PUT_YOUR_KEY>',
    selected: '',
    suggestions: [],
    sectionConfigs: {
      googleSuggest: {
        limit: 6,
        label: 'Suggestions',
        onSelected: selected => {
          this.fetchResults(selected.item, "")
          // https://github.com/Educents/vue-autosuggest/issues/52
          this.$refs.autocomplete.listeners.click()
        }
      },
      travelopy: {
        limit: 6,
        label: 'Travelopy',
        onSelected: selected => {
          this.selected = selected
        }
      },
      google: {
        limit: 6,
        label: 'Google',
        onSelected: selected => {
          this.selected = selected
        }
      }
    },
    inputProps: {
      id: "autosuggest__input",
      onInputChange: this.fetchResults,
      placeholder: 'Search places',
      initialValue: this.query,
    }
  },
  watch: {
    selected(value) {
      if (value) {
        const item = value.item
        if (item.location) {
          if (!marker) {
            marker = new google.maps.Marker({ position: item.location, map: map, title: item.name })
          }
          else {
            marker.setPosition(item.location)
            marker.setTitle(item.name)
          }

          map.panTo(item.location)
        }
        else {
          this.$toasted.show('Selection had no location')
        }
      }
    },
    fetchResults(val) {
      this.selected = null

      let delay = 300
      const len = val.length
      if (len == 0) {
        this.suggestions = []
        return
      }
      else if (len == 1) {
        delay = 1000
      }
      else if (len <= 3) {
        delay = 700
      }
      else if (len <= 5) {
        delay = 500
      }

      clearTimeout(timeout)
      timeout = setTimeout(() => {
        // hack to maintain position
        this.suggestions = [
          {name: 'google', data: null},
          {name: 'travelopy', data: null},
          {name: 'googleSuggest', data: null},
          ]

        axios.get(`/your_autocomplete_rest_api?q=${val}`)
          .then(response => {
              const results = response.data

              if (results.length === 0) return

              const newResults = results.map(item => {

                // TODO: perform your own mapping here

                let name = item.name
                const alt_names = []
                if (item.native_name)
                  name += ` (${item.native_name})`

                let location = null
                if (item.geo) {
                  const latlng = item.geo.split(', ')
                  location = new google.maps.LatLng(latlng[0], latlng[1])
                }

                return {
                  id: item.id,
                  type: 'place',
                  name: name,
                  address: item.address,
                  location: location,
                  place_type: item._item_type,
                }
              })

              const suggestion = { name: 'travelopy', data: newResults }
              const index = this.suggestions.findIndex(x => x.name === 'travelopy')
              if (index === -1)
                this.suggestions.push(suggestion)
              else
                Vue.set(this.suggestions, index, suggestion)

          })
          .catch((error) => {
              // const message = lua.util.getErrorMessage(error)
              // this.$toasted.error(message)
          })

        const request = {
          query: val,
          fields: ['place_id', 'name', 'formatted_address', 'icon', 'geometry'],
          // locationBias: null,
        }

        placeService.findPlaceFromQuery(request, (results, status) => {
        // placeService.textSearch(request, (results, status) => {
          if (status == google.maps.places.PlacesServiceStatus.OK) {

            // raw is used by new_api.py for new place creation
            const newResults = results.map(item => ({ id: item.place_id, type: 'google_place', name: item.name, address: item.formatted_address, location: item.geometry.location, place_icon: item.icon, raw: item }))

            const suggestion = { name: 'google', data: newResults }
            const index = this.suggestions.findIndex(x => x.name === 'google')
            if (index === -1)
              this.suggestions.push(suggestion)
            else
              Vue.set(this.suggestions, index, suggestion)
          }
        })


        const autocompleteRequest = {
          input: val,
        }

        autocompleteService.getPlacePredictions(autocompleteRequest, (results, status) => {
          if (status == google.maps.places.PlacesServiceStatus.OK) {

            const newResults = results.map(item => (item.description))

            const suggestion = { name: 'googleSuggest', data: newResults }
            const index = this.suggestions.findIndex(x => x.name === 'googleSuggest')
            if (index === -1)
              this.suggestions.push(suggestion)
            else
              Vue.set(this.suggestions, index, suggestion)
          }
        })

      }, delay)
    },
    renderSuggestion(suggestion) {
      const item = suggestion.item
      if (suggestion.name === 'travelopy') {
        return (
          <div>
            <div class="float-right text-secondary">{item.place_type}</div>
            <div>{item.name}</div>
            <small class="text-secondary">{item.address}</small>
          </div>
        )
      } else if (suggestion.name === 'google') {
        return (
          <div>
            <img class="float-right" style="max-width: 18px;" src={item.place_icon} />
            <div>{item.name}</div>
            <small class="text-secondary">{item.address}</small>
          </div>
        )
      } else {
        // assume this is string
        return item
      }
    },
    getSuggestionValue(item) {
      if (item.name == "travelopy" || item.name == "google") {
        return item.item.name
      } else {
        return item.item
      }
    },
  },
  created() {
    googleMapPromise = loadScript('https://maps.googleapis.com/maps/api/js?key=' + this.GOOGLE_API_KEY + '&libraries=places')
  },
  mounted() {
    googleMapPromise.then(() => {
      var mapCenter = new google.maps.LatLng(-33.8617374,151.2021291)

      map = new google.maps.Map(document.getElementById('map'), {
          center: mapCenter,
          zoom: 15
        })
      marker = null

      placeService = new google.maps.places.PlacesService(map)

      autocompleteService = new google.maps.places.AutocompleteService()
    })
  }
}
</script>

References: