chore: update host for Personalization Client (#791)

* chore: add convenient eu Region variable for personalization API

Author: VladislavFitz

Sources/AlgoliaSearchClient/Models/Common/Region.swift

@@ -4,14 +4,20 @@
 //
 //  Created by Vladislav Fitc on 23/04/2020.
 //
+// swiftlint:disable identifier_name
 
 import Foundation
 
 public struct Region: StringOption, ProvidingCustomOption {
 
   public static var us: Self { .init(rawValue: #function) }
+
+  /// European (Germany) region for Insights and Analytics APIs
   public static var de: Self { .init(rawValue: #function) }
 
+  /// European region for Personalization API
+  public static var eu: Self { .init(rawValue: #function) }
+
   public let rawValue: String
 
   public init(rawValue: String) {

Sources/AlgoliaSearchClient/Models/Internal/Hosts.swift

@@ -34,11 +34,17 @@ public struct Hosts {
     return [.init(url: URL(string: "insights\(regionComponent).algolia.io")!)]
   }
 
+  @available(*, deprecated, renamed: "personalization(forRegion:)")
   public static func recommendation(forRegion region: Region? = nil) -> [RetryableHost] {
     let regionComponent = region.flatMap { ".\($0.rawValue)" } ?? ""
     return [.init(url: URL(string: "recommendation\(regionComponent).algolia.com")!)]
   }
 
+  public static func personalization(forRegion region: Region? = nil) -> [RetryableHost] {
+    let regionComponent = region.flatMap { ".\($0.rawValue)" } ?? ""
+    return [.init(url: URL(string: "personalization\(regionComponent).algolia.com")!)]
+  }
+
   public static var analytics: [RetryableHost] = [
     .init(url: URL(string: "analytics.algolia.com")!)
   ]

Sources/AlgoliaSearchClient/Models/Personalization/PersonalizationConfiguration.swift

@@ -38,7 +38,7 @@ public struct PersonalizationConfiguration: Configuration, Credentials {
     self.writeTimeout = writeTimeout
     self.readTimeout = readTimeout
     self.logLevel = logLevel
-    self.hosts = Hosts.recommendation(forRegion: region)
+    self.hosts = Hosts.personalization(forRegion: region)
     self.defaultHeaders = defaultHeaders
     self.batchSize = batchSize
   }