improve web2web, add ability to restore by email (#124)

ApphudSDK.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'ApphudSDK'
-  s.version          = '3.5.5'
+  s.version          = '3.5.6'
   s.summary          = 'Build and Measure In-App Subscriptions on iOS.'
   s.description      = 'Apphud covers every aspect when it comes to In-App Subscriptions from integration to analytics on iOS and Android.'
   s.homepage         = 'https://github.com/apphud/ApphudSDK'

Sources/Internal/ApphudInternal+Attribution.swift

@@ -220,30 +220,45 @@ extension ApphudInternal {
 
     @MainActor
     internal func tryWebAttribution(attributionData: [AnyHashable: Any], completion: @escaping (Bool, ApphudUser?) -> Void) {
-        let userId = attributionData["aph_user_id"] ?? attributionData["apphud_user_id"]
-        if let userId = userId as? String, !userId.isEmpty {
-
-            if (currentUser?.userId == userId) {
-                apphudLog("Already web2web user, skipping")
-                completion(true, currentUser)
-                return
-            }
-
-            apphudLog("Found a match from web click, updating User ID to \(userId)", forceDisplay: true)
-            self.updateUser(fields: ["user_id": userId, "from_web2web": true]) { (result, _, data, _, _, _, attempts) in
+
+        let userId = (attributionData["aph_user_id"] ?? attributionData["apphud_user_id"]) as? String ?? ""
+        let email = (attributionData["email"] ?? attributionData["apphud_user_email"]) as? String ?? ""
+
+        if userId.isEmpty && email.isEmpty {
+            completion(false, currentUser)
+            return
+        }
+
+        if (email.isEmpty && currentUser?.userId == userId) {
+            apphudLog("Already web2web user, skipping")
+            completion(true, currentUser)
+            return
+        }
+
+        var params: [String: Any] = ["from_web2web": true]
+        if !userId.isEmpty {
+            params["user_id"] = userId
+        }
+        if !email.isEmpty {
+            params["email"] = email
+        }
+
+        apphudLog("Found a match from web click, updating User ID to \(userId)", forceDisplay: true)
+        self.performWhenUserRegistered {
+            self.updateUser(fields: params) { (result, _, data, _, _, _, attempts) in
                 if result {
                     Task {
-                        await self.parseUser(data: data)
+                        let changes = await self.parseUser(data: data)
+
                         Task { @MainActor in
+                            self.notifyAboutUpdates(changes)
                             completion(true, self.currentUser)
                         }
                     }
                 } else {
                     completion(false, self.currentUser)
                 }
             }
-        } else {
-            completion(false, currentUser)
         }
     }
 }

Sources/Public/Apphud.swift

@@ -14,7 +14,7 @@ import Foundation
 import UserNotifications
 import SwiftUI
 
-internal let apphud_sdk_version = "3.5.5"
+internal let apphud_sdk_version = "3.5.6"
 
 // MARK: - Initialization
 
@@ -791,10 +791,12 @@ final public class Apphud: NSObject {
 
     /**
         Web-to-Web flow only. Attempts to attribute the user with the provided attribution data.
-        If the `data` parameter contains either `aph_user_id` or `apphud_user_id`, the SDK will submit this information to the Apphud server.
-        The server will return a premium web user if found; otherwise, the callback will return `false`.
+        If the `data` parameter contains either `aph_user_id`, `apphud_user_id`,  `email` or `apphud_user_email`, the SDK will submit this information to the Apphud server.
+        The server will return a restored web user if found; otherwise, the callback will return `false`.
+     
+        __Important:__ If the callback returns `true`, it doesn't mean the user has premium access, you should still call `Apphud.hasPremiumAccess()`.
 
-        Additionally, the delegate methods `apphudSubscriptionsUpdated` and `apphudDidChangeUserID` will be called.
+        Additionally, the delegate methods `apphudSubscriptionsUpdated` and `apphudDidChangeUserID` may be called.
 
         The callback returns `true` if the user is successfully attributed via the web and includes the updated `ApphudUser` object.
         After this callback, you can check the `Apphud.hasPremiumAccess()` method, which should return `true` if the user has premium access.