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GeocodingapiController.swift
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GeocodingapiController.swift
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import Foundation
import Vapor
/**
API Endpoints:
/v1/search?name=Berlin (&country=DE &count=30 &lang=de) later maybe &page=1
Queries with 0 or 1 character, return empty results
2 character only exact match
3 character and more fuzzy search
// langauge ICAO and IATA also works!
/v1/get?id=12345 &lang=de
/v1/proximity?latitude=12&longitude=12 (&radius=30 &count=30 &page=1)
/v1/geoip
*/
struct GeocodingapiController: RouteCollection {
let database: GeocodingDatabase
public init(_ app: Application) throws {
database = try GeocodingDatabase.loadOrCreate(logger: app.logger)
}
func boot(routes: RoutesBuilder) throws {
let cors = CORSMiddleware(configuration: .init(
allowedOrigin: .all,
allowedMethods: [.GET, /*.POST, .PUT,*/ .OPTIONS, /*.DELETE, .PATCH*/],
allowedHeaders: [.accept, .authorization, .contentType, .origin, .xRequestedWith]
))
let corsGroup = routes.grouped(cors, ErrorMiddleware.default(environment: try .detect()))
let categoriesRoute = corsGroup.grouped("v1")
categoriesRoute.get("search", use: self.search)
categoriesRoute.get("proximity", use: self.proxmity)
categoriesRoute.get("get", use: self.get)
}
func search(_ request: Request) throws -> EventLoopFuture<Response> {
struct SearchQuery: Content {
let name: String
let language: String?
let countryCode: String?
let format: ProtobufSerializationFormat?
let count: Int?
func getCount() throws -> Int {
let count = self.count ?? 10
guard count > 0 && count <= 100 else {
throw GeocodingApiError.invalidCount
}
return count
}
}
let start = Date()
let params = try request.query.decode(SearchQuery.self)
let language = params.language ?? "en"
let languageId = database.geonames.languages.firstIndex(of: language) ?? database.geonames.languages.firstIndex(of: "en")!
let count = try params.getCount()
var name = params.name
var areaIds: [Int32]?
if name.contains(",") { // Split string by comma, so we can filter the results later by second part
let parts = name.components(separatedBy: ",")
name = parts[0].trimmingCharacters(in: .whitespacesAndNewlines)
let areaName = parts[1].trimmingCharacters(in: .whitespacesAndNewlines)
if areaName.count > 1 {
areaIds = database.search(areaName, languageId: Int32(languageId), maxCount: 10).compactMap({
guard ["ADM1","ADM2","ADM3","ADM4","PCLI"].contains(database.geonames.geonames[$0.0]?.featureCode) else {
return nil
}
return $0.0
})
}
}
var results = params.name.count < 2 ? [] : database.search(name, languageId: Int32(languageId), maxCount: count)
/// TODO country filter need to be inside database match, because `count` would be wrong otherwise
if let countryCode = params.countryCode {
/*guard let countryId = searchTree.geonames.countryIso2.firstIndex(of: countryCode) else {
throw GeocodingApiError.invalidContryCode
}*/
results = results.filter({
guard let c = database.geonames.geonames[$0.0]?.countryIso2 else {
return false
}
return c == countryCode
})
}
if let areas = areaIds {
results = results.filter({ // Filter the results by second part of the original string
return areas.contains(database.geonames.geonames[$0.0]?.admin1ID ?? -1)
|| areas.contains(database.geonames.geonames[$0.0]?.admin2ID ?? -1)
|| areas.contains(database.geonames.geonames[$0.0]?.admin3ID ?? -1)
|| areas.contains(database.geonames.geonames[$0.0]?.admin4ID ?? -1)
|| areas.contains(database.geonames.geonames[$0.0]?.countryID ?? -1)
})
}
let mapped: [GeocodingApi.Geoname] = results.map({
guard let geoname = database.geonames.getResponse(id: $0.0, languageId: Int32(languageId), searchRank: $0.1) else {
fatalError("Geoname in search index was not in database.")
}
return geoname
})
var out = GeocodingApi.SearchResults()
out.results = mapped
out.generationtimeMs = Float(Date().timeIntervalSince(start)*1000)
return request.eventLoop.makeSucceededFuture(try out.encode(format: params.format))
}
func proxmity(_ request: Request) throws -> EventLoopFuture<Response> {
struct SearchQuery: Content {
let latitude: Float
let longitude: Float
let language: String?
let countryCode: String?
let format: ProtobufSerializationFormat?
let count: Int?
func getCount() throws -> Int {
let count = self.count ?? 10
guard count > 0 && count <= 100 else {
throw GeocodingApiError.invalidCount
}
return count
}
}
let start = Date()
let params = try request.query.decode(SearchQuery.self)
let language = params.language ?? "en"
let languageId = database.geonames.languages.firstIndex(of: language) ?? database.geonames.languages.firstIndex(of: "en")!
let count = try params.getCount()
// TODO ranking by distance OR priority
var results = database.proximity(latitude: params.latitude, longitude: params.longitude, maxCount: count, maxDistanceKilometer: 100)
/// TODO country filter need to be inside database match, because `count` would be wrong otherwise
if let countryCode = params.countryCode {
/*guard let countryId = searchTree.geonames.countryIso2.firstIndex(of: countryCode) else {
throw GeocodingApiError.invalidContryCode
}*/
results = results.filter({
guard let c = database.geonames.geonames[$0.0]?.countryIso2 else {
return false
}
return c == countryCode
})
}
let mapped: [GeocodingApi.Geoname] = results.map({
guard let geoname = database.geonames.getResponse(id: $0.0, languageId: Int32(languageId), searchRank: $0.1) else {
fatalError("Geoname in search index was not in database.")
}
return geoname
})
var out = GeocodingApi.SearchResults()
out.results = mapped
out.generationtimeMs = Float(Date().timeIntervalSince(start)*1000)
return request.eventLoop.makeSucceededFuture(try out.encode(format: params.format))
}
func get(_ request: Request) throws -> EventLoopFuture<Response>{
struct GetQuery: Content {
let id: Int32
let language: String?
let format: ProtobufSerializationFormat?
}
let params = try request.query.decode(GetQuery.self)
let language = params.language ?? "en"
let languageId = database.geonames.languages.firstIndex(of: language) ?? database.geonames.languages.firstIndex(of: "en")!
guard let out = database.geonames.getResponse(id: params.id, languageId: Int32(languageId), searchRank: 0) else {
throw GeocodingApiError.locationNotFound(id: params.id)
}
return request.eventLoop.makeSucceededFuture(try out.encode(format: params.format))
}
}
enum GeocodingApiError: Error {
case locationNotFound(id: Int32)
case invalidCount
//case invalidContryCode
}
extension GeocodingApiError: AbortError {
var status: HTTPResponseStatus {
return .badRequest
}
var reason: String {
switch self {
case .locationNotFound(id: _):
return "Location ID not found."
//case .invalidContryCode:
// return "Invalid country code"
case .invalidCount:
return "Parameter count must be between 1 and 100."
}
}
}
extension GeocodingDatabase.Geoname {
func getName(languageId: Int32) -> String {
return alternativeNames.first(where: {$0.0 == languageId})?.1 ?? name
}
}
extension GeocodingDatabase.Geonames {
func getResponse(id: Int32, languageId: Int32, searchRank: Float) -> GeocodingApi.Geoname? {
guard let g = geonames[id] else {
return nil
}
var out = GeocodingApi.Geoname()
out.id = g.id
out.name = g.getName(languageId: languageId)
out.latitude = g.latitude
out.longitude = g.longitude
out.elevation = g.elevation
out.countryCode = g.countryIso2
out.countryID = g.countryID
out.country = geonames[g.countryID]?.getName(languageId: languageId) ?? ""
out.featureCode = g.featureCode
out.admin1ID = g.admin1ID
out.admin2ID = g.admin2ID
out.admin3ID = g.admin3ID
out.admin4ID = g.admin4ID
out.admin1 = geonames[g.admin1ID]?.getName(languageId: languageId) ?? ""
out.admin2 = geonames[g.admin2ID]?.getName(languageId: languageId) ?? ""
out.admin3 = geonames[g.admin3ID]?.getName(languageId: languageId) ?? ""
out.admin4 = geonames[g.admin4ID]?.getName(languageId: languageId) ?? ""
out.population = g.population
out.timezone = timezones[Int(g.timezoneIndex)]
out.postcodes = g.postcodes
//out.ranking = g.ranking
//out.searchRank = searchRank
return out
}
}