provider-geo-lookup

Lookup a Lambda based on a PostGIS database

Usage

• npm install provider-geo-lookup
• Configure config.js or set environment variables like so
  • POSTGRESQL_DB_URL - connection string starting with postgres:// and not including database
  • POSTGRESQL_DB_NAME - the PostGIS database to use
• var geolookup = require('provider-geo-lookup')

API

flushDB()

Drops the PostGIS table used by the module

geolookup.flushDB().then(function() {
    console.log('Table dropped')
  },function(err) {
    console.log('Error flushing', err)
  })

initDB([params])

Creates the table and loads data from taxi.json

var params = { createExtension: false, importData: false };  
geolookup.initDB(params).then(function(){  // params is optional
    console.log('Table created')
  },function(err) {
    console.log('Error creating DB', err)
  })

providerForLocation(providerType, geoLocation)

Does the geo lookup for a given provider type, and a given lat,lngstring

geolookup.providerForLocation('ondemand',"60.3463,24.245").then(
    function(providers) {
      console.log('Provider:', providers)
    },function(err) {
      console.log('Error fetching provider', err)
    })

selectAllProviders([providerType],[point])

Return all providers up to a limit, sorted by distance. Arguments can both be null or both must be supplied.

geolookup.selectAllProviders("ondemand", "65.18303007291382,29.9267578125").then(
    function(providers) {
      console.log('Provider:', providers)
    },function(err) {
      console.log('Error fetching provider', err)
    })

### insertProvider({...}) Add a provider to the database. Provider must be in the format as below. Note that the database only supports Polygon shapes, a MultiPolygonor LineString will fail.

var provider = {
  "maasProviderType": "ondemand", 
  "maasProviderName": "MaaS-provider-ondemand-mytaxiprovider",
  "priority": 1,
  "location": {"type":"Polygon","coordinates":[...]}
}

geolookup.insertProvider(provider).then(
    function(provider) {
      console.log('Inserted:', provider)
    },function(err) {
      console.log('Error inserting provider', err)
    })

Deleting data?

Not implemented :)