feat(virtual indices): Virtual indices related parameters (#727)

* Add `relevancyStrictness` to Search and Settings parameters
* Add `appliedRelevancyStrictness` and `nbSortedHits` fields to search response

Author: VladislavFitz

Sources/AlgoliaSearchClient/Models/Common/CommonParameters.swift

@@ -276,5 +276,14 @@ public protocol CommonParameters {
    - [Documentation](https://www.algolia.com/doc/api-reference/api-parameters/attributeCriteriaComputedByMinProximity/?language=swift)
    */
   var attributeCriteriaComputedByMinProximity: Bool? { get set }
-
+  
+  /**
+   The relevancy threshold to apply to search in a virtual index [0-100]. A Bigger
+   value means fewer, but more relevant results, smaller value means more, but
+   less relevant results.
+   - Engine default: false
+   - [Documentation](https://www.algolia.com/doc/api-reference/api-parameters/?language=swift)
+   */
+  var relevancyStrictness: Int? { get set }
+  
 }

Sources/AlgoliaSearchClient/Models/Search/Response/SearchResponse/SearchResponse.swift

@@ -224,6 +224,16 @@ public struct SearchResponse {
    Meta-information as to how the query was processed.
   */
   public var explain: Explain?
+  
+  /**
+   The relevancy threshold applied to search in a virtual index.
+   */
+  public var appliedRelevancyStrictness: Int?
+  
+  /**
+   Subset of hits selected when relevancyStrictness is applied.
+   */
+  public var nbSortedHits: Int?
 
   public init(hits: [Hit<JSON>] = []) {
     self.hits = hits

Sources/AlgoliaSearchClient/Models/Search/SearchParametersStorage.swift

@@ -76,6 +76,7 @@ public struct SearchParametersStorage: SearchParameters, Equatable {
   public var attributeCriteriaComputedByMinProximity: Bool?
   public var enableABTest: Bool?
   public var explainModules: [ExplainModule]?
+  public var relevancyStrictness: Int?
 }
 
 protocol SearchParametersStorageContainer: SearchParameters {
@@ -357,4 +358,8 @@ extension SearchParametersStorageContainer {
     get { searchParametersStorage.explainModules }
     set { searchParametersStorage.explainModules = newValue }
   }
+  public var relevancyStrictness: Int? {
+    get { searchParametersStorage.relevancyStrictness }
+    set { searchParametersStorage.relevancyStrictness = newValue }
+  }
 }

Sources/AlgoliaSearchClient/Models/Settings/SettingsParametersStorage.swift

@@ -65,6 +65,7 @@ struct SettingsParametersStorage: SettingsParameters {
   var userData: JSON?
   var version: Int?
   var primary: IndexName?
+  var relevancyStrictness: Int?
 }
 
 extension SettingsParametersStorage: Codable {
@@ -305,5 +306,8 @@ extension SettingsParametersStorageContainer {
     get { settingsParametersStorage.primary }
     set { settingsParametersStorage.primary = newValue }
   }
-
+  public var relevancyStrictness: Int? {
+    get { settingsParametersStorage.relevancyStrictness }
+    set { settingsParametersStorage.relevancyStrictness = newValue }
+  }
 }