BTHLABS-58: Share Extension in Apple Apps

2025-10-04 08:02:13 +02:00
parent 0c12f52569
commit 99e9226338
122 changed files with 5488 additions and 411 deletions
--- a/(App)/Assets.xcassets/DangerColor.colorset/Contents.json
+++ b/(App)/Assets.xcassets/DangerColor.colorset/Contents.json
@@ -0,0 +1,20 @@
+{
+  "colors" : [
+    {
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "alpha" : "1.000",
+          "blue" : "0.463",
+          "green" : "0.392",
+          "red" : "0.933"
+        }
+      },
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
--- a/(App)/Assets.xcassets/SuccessColor.colorset/Contents.json
+++ b/(App)/Assets.xcassets/SuccessColor.colorset/Contents.json
@@ -0,0 +1,20 @@
+{
+  "colors" : [
+    {
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "alpha" : "1.000",
+          "blue" : "0x67",
+          "green" : "0xA7",
+          "red" : "0x0E"
+        }
+      },
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
--- a/(App)/Assets.xcassets/WarningColor.colorset/Contents.json
+++ b/(App)/Assets.xcassets/WarningColor.colorset/Contents.json
@@ -0,0 +1,20 @@
+{
+  "colors" : [
+    {
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "alpha" : "1.000",
+          "blue" : "0x2E",
+          "green" : "0x96",
+          "red" : "0xF1"
+        }
+      },
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
--- a/services/apple/Shared
+++ b/services/apple/Shared
@@ -0,0 +1,32 @@
+//
+//  HPAPI.h
+//  HotPocket
+//
+//  Created by Tomek Wójcik on 23/09/2025.
+//
+
+#import <Foundation/Foundation.h>
+
+#import "HPRPCClient.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+typedef void (^HPAPICheckAuthCompletionHandler)(BOOL authValid, NSError * _Nullable error, NSString * _Nullable callId);
+
+@interface HPAPI : NSObject
+
+@property (nullable) HPRPCClient *rpcClient;
+@property NSMutableSet *callIds;
+
+-(id)initWithRPCClientDelegate:(id<HPRPCClientDelegate>)delegate;
+
+(NSDictionary *)getAccessTokenMeta;
+
+-(NSString *)checkAuth;
+-(void)checkAuth:(HPAPICheckAuthCompletionHandler)completionHandler;
+-(NSString *)save:(NSURL *)url;
+-(BOOL)save:(NSURL *)url completionHandler:(HPRPCClientCompletionHandler)completionHandler;
+
+@end
+
+NS_ASSUME_NONNULL_END
--- a/services/apple/Shared
+++ b/services/apple/Shared
@@ -0,0 +1,148 @@
+//
+//  HPAPI.m
+//  HotPocket
+//
+//  Created by Tomek Wójcik on 23/09/2025.
+//
+
+#import "HPAPI.h"
+
+#import "HPCredentialsHelper.h"
+#import "HPRPCClient.h"
+
+@implementation HPAPI (HPAPIPrivate)
+
+#pragma mark - Private interface
+
+-(void)updateRPCClientCredentials {
+    HPCredentials *credentials = [[HPCredentialsHelper sharedHelper] getCredentials];
+    self.rpcClient.baseURL = credentials.rpcURL;
+    self.rpcClient.accessToken = credentials.accessToken;
+}
+
+@end
+
+@implementation HPAPI
+
+#pragma mark - Initialization
+
+-(id)init {
+    if (self = [super init]) {
+        self.rpcClient = [[HPRPCClient alloc] initWithBaseURL:nil accessToken:nil];
+
+        [self updateRPCClientCredentials];
+        
+        [[NSNotificationCenter defaultCenter] addObserver:self
+                                                 selector:@selector(onCredentialsChanged:)
+                                                     name:@"HPCredentialsChanged"
+                                                   object:nil];
+    }
+    
+    return self;
+}
+
+-(id)initWithRPCClientDelegate:(id<HPRPCClientDelegate>)rpcClientDelegate {
+    if (self = [self init]) {
+        self.rpcClient.delegate = rpcClientDelegate;
+    }
+    
+    return self;
+}
+
+-(void)dealloc {
+    [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
+#pragma mark - Public interface
+
+(NSDictionary *)getAccessTokenMeta {
+    NSString *platform = @"macOS";
+#ifdef TARGET_OS_IOS
+    platform = @"iPhone";
+#endif
+    
+    return @{
+        @"version": [[[NSBundle mainBundle] infoDictionary] valueForKey:@"CFBundleShortVersionString"],
+        @"platform": platform,
+    };
+}
+
+-(NSString *)checkAuth {
+    if (self.rpcClient.hasCredentials == NO) {
+        return nil;
+    }
+    
+    NSString *callId = [[NSUUID UUID] UUIDString];
+
+    BOOL callResult = [self.rpcClient call:callId
+                                    method:@"accounts.auth.check_access_token"
+                                    params:@[self.rpcClient.accessToken, [HPAPI getAccessTokenMeta]]
+                                 endopoint:@"/accounts/rpc/"];
+    if (callResult == NO) {
+        return nil;
+    }
+    
+    return callId;
+}
+
+-(void)checkAuth:(HPAPICheckAuthCompletionHandler)completionHandler {
+    if (self.rpcClient.hasCredentials == NO) {
+        completionHandler(NO, nil, nil);
+    } else {
+        NSString *callId = [[NSUUID UUID] UUIDString];
+        BOOL callResult = [self.rpcClient call:callId
+                                        method:@"accounts.auth.check_access_token"
+                                        params:@[self.rpcClient.accessToken, [HPAPI getAccessTokenMeta]]
+                                     endopoint:@"/accounts/rpc/" completionHandler:^(NSString *finalCallId, HPRPCCallResult *result) {
+            BOOL authValid = YES;
+            if (result.error != nil) {
+                authValid = NO;
+            } else if ([(NSNumber *)result.result boolValue] == NO) {
+                authValid = NO;
+            }
+            
+            completionHandler(authValid, result.error, finalCallId);
+        }];
+    }
+}
+
+-(NSString *)save:(NSURL *)url {
+    if (self.rpcClient.hasCredentials == NO) {
+        return nil;
+    }
+    
+    if (url == nil) {
+        return nil;
+    }
+    
+    NSString *callId = [[NSUUID UUID] UUIDString];
+    BOOL callResult = [self.rpcClient call:callId method:@"saves.create" params:@[[url absoluteString]]];
+    if (callResult == NO) {
+        return nil;
+    }
+    
+    return callId;
+}
+
+-(BOOL)save:(NSURL *)url completionHandler:(HPRPCClientCompletionHandler)completionHandler {
+    if (self.rpcClient.hasCredentials == NO) {
+        return NO;
+    }
+    
+    if (url == nil) {
+        return NO;
+    }
+    
+    NSString *callId = [[NSUUID UUID] UUIDString];
+    return [self.rpcClient call:callId
+                         method:@"saves.create"
+                         params:@[[url absoluteString]]
+              completionHandler:completionHandler];
+}
+
+#pragma mark - Notification handlers
+
+-(void)onCredentialsChanged:(NSNotification *)notification {
+    [self updateRPCClientCredentials];
+}
+@end
--- a/services/apple/Shared
+++ b/services/apple/Shared
@@ -0,0 +1,30 @@
+//
+//  HPAuthFlow.h
+//  HotPocket (macOS)
+//
+//  Created by Tomek Wójcik on 21/09/2025.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface HPAuthParams : NSObject
+
+@property (copy) NSString *authKey;
+@property (copy) NSString *sessionToken;
+
+@end
+
+@interface HPAuthFlow : NSObject
+
+@property (nullable) NSURL *baseURL;
+@property (nullable) NSString *sessionToken;
+
+-(NSURL *)start;
+-(HPAuthParams *)handlePostAuthenticateURL:(NSURL *)url;
+-(BOOL)handleAuthParams:(HPAuthParams *)authParams;
+
+@end
+
+NS_ASSUME_NONNULL_END
--- a/services/apple/Shared
+++ b/services/apple/Shared
@@ -0,0 +1,140 @@
+//
+//  HPAuthFlow.m
+//  HotPocket (macOS)
+//
+//  Created by Tomek Wójcik on 21/09/2025.
+//
+
+#import "HPAuthFlow.h"
+
+#import "HPAPI.h"
+#import "HPCredentialsHelper.h"
+#import "HPRPCClient.h"
+
+@implementation HPAuthParams
+
+#pragma mark - HPAuthParams implementation
+
+@end
+
+@implementation HPAuthFlow (HPAuthFlowPrivate)
+
+#pragma mark - HPAuthFlow private interface
+
+-(NSURL *)resolveAuthenticateURL {
+    if (self.baseURL == nil) {
+        return nil;
+    }
+    
+    NSURL *authURL = [self.baseURL URLByAppendingPathComponent:@"/integrations/extension/authenticate/"];
+    
+    if (authURL.scheme == nil) {
+        return nil;
+    }
+    
+    NSBundle *mainBundle = [NSBundle mainBundle];
+    
+    NSURLComponents *authURLComponents = [NSURLComponents componentsWithURL:authURL resolvingAgainstBaseURL:NO];
+    authURLComponents.queryItems = @[
+        [NSURLQueryItem queryItemWithName:@"source" value:[[mainBundle infoDictionary] valueForKey:@"HPAuthFlowSource"]],
+        [NSURLQueryItem queryItemWithName:@"session_token" value:self.sessionToken],
+    ];
+    
+    return authURLComponents.URL;
+}
+
+@end
+
+@implementation HPAuthFlow
+
+#pragma mark - Initialization
+
+-(id)init {
+    if (self = [super init]) {
+        self.baseURL = nil;
+        self.sessionToken = nil;
+    }
+    
+    return self;
+}
+
+#pragma mark - Public interface
+
+-(NSURL *)start {
+    if (self.baseURL == nil) {
+        return nil;
+    }
+    
+    if (self.sessionToken == nil) {
+        self.sessionToken = [[NSUUID UUID] UUIDString];
+    }
+    
+    return [self resolveAuthenticateURL];
+}
+
+-(HPAuthParams *)handlePostAuthenticateURL:(NSURL *)url {
+    if (url == nil) {
+        return nil;
+    }
+    
+    NSDictionary *postAuthenticateURLParams = [[[NSBundle mainBundle] infoDictionary] valueForKey:@"HPAuthFlowPostAuthenticateURLParts"];
+    if (postAuthenticateURLParams == nil) {
+        return nil;
+    }
+    
+    NSURLComponents *urlComponents = [NSURLComponents componentsWithURL:url resolvingAgainstBaseURL:NO];
+    
+    if ([urlComponents.scheme isEqualToString:[postAuthenticateURLParams valueForKey:@"scheme"]] == NO) {
+        return nil;
+    }
+    
+    if ([urlComponents.host isEqualToString:[postAuthenticateURLParams valueForKey:@"host"]] == NO) {
+        return nil;
+    }
+    
+    HPAuthParams *result = [[HPAuthParams alloc] init];
+    for (NSURLQueryItem *queryItem in urlComponents.queryItems) {
+        if ([queryItem.name isEqualToString:@"auth_key"] == YES) {
+            result.authKey = queryItem.value;
+        } else if ([queryItem.name isEqualToString:@"session_token"] == YES) {
+            result.sessionToken = queryItem.value;
+        }
+    }
+    
+    if ([self.sessionToken isEqualToString:result.sessionToken] == NO) {
+        return nil;
+    }
+
+    return result;
+}
+
+-(BOOL)handleAuthParams:(HPAuthParams *)authParams {
+    HPRPCClient *rpcClient = [[HPRPCClient alloc] initWithBaseURL:self.baseURL accessToken:nil];
+    
+    NSArray *callParams = @[
+        authParams.authKey,
+        [HPAPI getAccessTokenMeta],
+    ];
+    
+    BOOL callResult = [rpcClient call:self.sessionToken
+                               method:@"accounts.access_tokens.create"
+                               params:callParams endopoint:@"/accounts/rpc/"
+                    completionHandler:^(NSString *callId, HPRPCCallResult *result) {
+        dispatch_async(dispatch_get_main_queue(), ^{
+            if (result.error != nil) {
+                NSLog(@"-[HPAuthFlow handleAuthParams:] error=`%@`", result.error);
+            } else {
+                HPCredentialsHelper *credentialsHelper = [HPCredentialsHelper sharedHelper];
+                [credentialsHelper saveCredentials:[self.baseURL absoluteString] accessToken:(NSString *)result.result];
+            }
+            
+            self.sessionToken = nil;
+            
+            [[NSNotificationCenter defaultCenter] postNotificationName:@"AuthFlowDidFinish" object:self];
+        });
+    }];
+    
+    return callResult;
+}
+
+@end
--- a/(App)/HPCredentialsHelper.h
+++ b/(App)/HPCredentialsHelper.h
@@ -0,0 +1,32 @@
+//
+//  HPCredentialsHelper.h
+//  HotPocket
+//
+//  Created by Tomek Wójcik on 19/09/2025.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface HPCredentials : NSObject
+
+@property (nullable) NSString *baseURL;
+@property (nullable) NSString *accessToken;
+
+@property (readonly) BOOL usable;
+@property (readonly) NSURL *rpcURL;
+
+@end
+
+@interface HPCredentialsHelper : NSObject
+
+(instancetype)sharedHelper;
+
+-(HPCredentials *)getCredentials;
+-(BOOL)saveCredentials:(NSString *)baseURL accessToken:(NSString *)accessToken;
+-(BOOL)clearCredentials;
+
+@end
+
+NS_ASSUME_NONNULL_END
--- a/(App)/HPCredentialsHelper.m
+++ b/(App)/HPCredentialsHelper.m
@@ -0,0 +1,218 @@
+//
+//  HPCredentialsHelper.m
+//  HotPocket
+//
+//  Created by Tomek Wójcik on 19/09/2025.
+//
+
+#import <Security/Security.h>
+
+#import "HPCredentialsHelper.h"
+
+@implementation HPCredentials
+
+#pragma mark - HPCredentials implementation
+
+-(id)init {
+    if (self = [super init]) {
+        self.baseURL = nil;
+        self.accessToken = nil;
+    }
+    
+    return self;
+}
+
+-(BOOL)usable {
+    return (self.baseURL != nil && self.accessToken != nil);
+}
+
+-(NSURL *)rpcURL {
+    return [NSURL URLWithString:self.baseURL];
+}
+
+-(NSString *)description {
+    NSMutableDictionary *attributes = [NSMutableDictionary dictionaryWithCapacity:2];
+    
+    if (self.baseURL == nil) {
+        [attributes setValue:@"(null)" forKey:@"baseURL"];
+    } else {
+        [attributes setValue:self.baseURL forKey:@"baseURL"];
+    }
+    
+    if (self.accessToken == nil) {
+        [attributes setValue:@"(null)" forKey:@"accessToken"];
+    } else {
+        [attributes setValue:@"***" forKey:@"accessToken"];
+    }
+    
+    return [NSString stringWithFormat:@"<%@: %p; %@>", NSStringFromClass([self class]), self, attributes];
+}
+
+@end
+
+@implementation HPCredentialsHelper (HPCredentialsHelperPrivate)
+
+#pragma mark - Private interface
+
+-(NSString *)getService {
+#ifdef DEBUG
+    return @"pl.bthlabs.HotPocket.Debug";
+#else
+    return @"pl.bthlabs.HotPocket";
+#endif
+}
+
+-(NSData *)getKeychainItem:(NSString *)service account:(NSString *)account {
+    if (service == nil || account == nil) {
+        return nil;
+    }
+    
+    NSDictionary *query = @{
+        (__bridge id)kSecClass: (__bridge id)kSecClassGenericPassword,
+        (__bridge id)kSecAttrService: service,
+        (__bridge id)kSecAttrAccount: account,
+        (__bridge id)kSecReturnData: @YES,
+        (__bridge id)kSecMatchLimit: (__bridge id)kSecMatchLimitOne,
+        (__bridge id)kSecAttrAccessGroup: @"648728X64K.pl.bthlabs.HotPocketShared",
+        (__bridge id)kSecUseDataProtectionKeychain: @YES,
+    };
+    
+    CFTypeRef resultData = NULL;
+    OSStatus status = SecItemCopyMatching((__bridge CFDictionaryRef)query, &resultData);
+    
+    if (status == errSecSuccess && resultData != NULL) {
+        NSData *result = (__bridge_transfer NSData *)resultData;
+        return result;
+    } else {
+        CFStringRef statusStringRef = SecCopyErrorMessageString(status, NULL);
+        NSString *statusString = (__bridge NSString *)statusStringRef;
+        NSLog(@"-[HPCredentialsHelper getKeychainItem:account:] service=`%@` account=`%@` status=%@", service, account, statusString);
+        return nil;
+    }
+}
+
+-(BOOL)createKeychainItemWithValue:(NSData *)value service:(NSString *)service account:(NSString *)account {
+    if (value == nil || service == nil || account == nil) {
+        return NO;
+    }
+    
+    NSDictionary *attributes = @{
+        (__bridge id)kSecClass: (__bridge id)kSecClassGenericPassword,
+        (__bridge id)kSecAttrService: service,
+        (__bridge id)kSecAttrAccount: account,
+        (__bridge id)kSecValueData: value,
+        (__bridge id)kSecAttrAccessGroup: @"648728X64K.pl.bthlabs.HotPocketShared",
+        (__bridge id)kSecUseDataProtectionKeychain: @YES,
+    };
+
+    OSStatus status = SecItemAdd((__bridge CFDictionaryRef)attributes, NULL);
+    
+    if (status != errSecSuccess) {
+        CFStringRef statusStringRef = SecCopyErrorMessageString(status, NULL);
+        NSString *statusString = (__bridge NSString *)statusStringRef;
+        NSLog(@"-[HPCredentialsHelper createKeychainItemWithValue:service:account:] service=`%@` account=`%@` status=%@", service, account, statusString);
+        return NO;
+    }
+    
+    return YES;
+}
+
+-(BOOL)deleteKeychainItem:(NSString *)service account:(NSString *)account {
+    if (service == nil || account == nil) {
+        return NO;
+    }
+    
+    NSDictionary *query = @{
+        (__bridge id)kSecClass: (__bridge id)kSecClassGenericPassword,
+        (__bridge id)kSecAttrService: service,
+        (__bridge id)kSecAttrAccount: account,
+        (__bridge id)kSecAttrAccessGroup: @"648728X64K.pl.bthlabs.HotPocketShared",
+        (__bridge id)kSecUseDataProtectionKeychain: @YES,
+    };
+    
+    OSStatus status = SecItemDelete((__bridge CFDictionaryRef)query);
+    
+    if (status != errSecSuccess) {
+        CFStringRef statusStringRef = SecCopyErrorMessageString(status, NULL);
+        NSString *statusString = (__bridge NSString *)statusStringRef;
+        NSLog(@"-[HPCredentialsHelper deleteKeychainItem:account:] service=`%@` account=`%@` status=%@", service, account, statusString);
+        return NO;
+    }
+    
+    return YES;
+}
+
+@end
+
+@implementation HPCredentialsHelper
+
+#pragma mark - Initialization
+
+(instancetype)sharedHelper {
+    static HPCredentialsHelper *sharedInstance = nil;
+    static dispatch_once_t initToken;
+    dispatch_once(&initToken, ^{
+        sharedInstance = [[self alloc] init];
+    });
+    
+    return sharedInstance;
+}
+
+#pragma mark - Public interface
+
+-(HPCredentials *)getCredentials {
+    HPCredentials *result = [[HPCredentials alloc] init];
+    
+    NSData *itemData = [self getKeychainItem:[self getService] account:@"RPC"];
+    if (itemData != nil) {
+        NSError *error;
+        NSDictionary *itemPayload = [NSJSONSerialization JSONObjectWithData:itemData
+                                                                         options:NSJSONReadingTopLevelDictionaryAssumed
+                                                                           error:&error];
+        
+        if (error != nil) {
+            NSLog(@"-[HPCredentialsHalper getCredentials] error=`%@`", error);
+        } else if (itemPayload != nil) {
+            result.baseURL = [itemPayload valueForKey:@"baseURL"];
+            result.accessToken = [itemPayload valueForKey:@"accessToken"];
+        }
+    }
+    
+    return result;
+}
+
+-(BOOL)saveCredentials:(NSString *)baseURL accessToken:(NSString *)accessToken {
+    NSMutableDictionary *itemPayload = [NSMutableDictionary dictionaryWithCapacity:2];
+    
+    if (baseURL != nil) {
+        [itemPayload setValue:baseURL forKey:@"baseURL"];
+    }
+    
+    if (accessToken != nil) {
+        [itemPayload setValue:accessToken forKey:@"accessToken"];
+    }
+    
+    NSError *error;
+    NSData *itemData = [NSJSONSerialization dataWithJSONObject:itemPayload options:0 error:&error];
+    
+    if (error != nil) {
+        NSLog(@"-[HPCredentialsHalper saveCredentials:accessToken:] error=`%@`", error);
+        return NO;
+    }
+    
+    BOOL saveResult = [self createKeychainItemWithValue:itemData service:[self getService] account:@"RPC"];
+    
+    [[NSNotificationCenter defaultCenter] postNotificationName:@"HPCredentialsChanged" object:self];
+    
+    return saveResult;
+}
+
+-(BOOL)clearCredentials {
+    BOOL deleteResult = [self deleteKeychainItem:[self getService] account:@"RPC"];
+    
+    [[NSNotificationCenter defaultCenter] postNotificationName:@"HPCredentialsChanged" object:self];
+    
+    return deleteResult;
+}
+
+@end
--- a/services/apple/Shared
+++ b/services/apple/Shared
@@ -0,0 +1,44 @@
+//
+//  HPRPCClient.h
+//  HotPocket
+//
+//  Created by Tomek Wójcik on 19/09/2025.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface HPRPCCallResult : NSObject
+
+@property (nullable) NSError *error;
+@property (nullable) id result;
+
+@end
+
+@protocol HPRPCClientDelegate <NSObject>
+
+-(void)rpcClientDidReceiveResult:(HPRPCCallResult *)result callId:(NSString *)callId;
+
+@end
+
+typedef void (^HPRPCClientCompletionHandler)(NSString * _Nullable callId, HPRPCCallResult * _Nullable result);
+
+@interface HPRPCClient : NSObject
+
+@property (nonatomic, weak) id<HPRPCClientDelegate> delegate;
+@property NSURL *baseURL;
+@property NSString *accessToken;
+@property NSURLSession *session;
+
+-(id)initWithBaseURL:(nullable NSURL *)baseURL accessToken:(nullable NSString *)accessToken;
+
+-(BOOL)hasCredentials;
+-(BOOL)call:(nullable NSString *)callId method:(NSString *)method params:(NSArray *)params endopoint:(nullable NSString *)endpoint completionHandler:(HPRPCClientCompletionHandler)completionHandler;
+-(BOOL)call:(nullable NSString *)callId method:(NSString *)method params:(NSArray *)params endopoint:(nullable NSString *)endpoint;
+-(BOOL)call:(nullable NSString *)callId method:(NSString *)method params:(NSArray *)params;
+-(BOOL)call:(nullable NSString *)callId method:(NSString *)method params:(NSArray *)params completionHandler:(HPRPCClientCompletionHandler)completionHandler;
+
+@end
+
+NS_ASSUME_NONNULL_END
--- a/services/apple/Shared
+++ b/services/apple/Shared
@@ -0,0 +1,185 @@
+//
+//  HPRPCClient.m
+//  HotPocket
+//
+//  Created by Tomek Wójcik on 19/09/2025.
+//
+
+#import "HPRPCClient.h"
+
+@implementation HPRPCCallResult
+
+#pragma mark - HPRPCCallResult implementation
+
+-(id)init {
+    if (self = [super init]) {
+        self.error = nil;
+        self.result = nil;
+    }
+    
+    return self;
+}
+
+-(NSString *)description {
+    NSMutableDictionary *attributes = [NSMutableDictionary dictionaryWithCapacity:2];
+    
+    if (self.error == nil) {
+        [attributes setValue:@"(null)" forKey:@"error"];
+    } else {
+        [attributes setValue:self.error forKey:@"error"];
+    }
+    
+    if (self.result == nil) {
+        [attributes setValue:@"(null)" forKey:@"result"];
+    } else {
+        [attributes setValue:self.result forKey:@"result"];
+    }
+    
+    return [NSString stringWithFormat:@"<%@: %p; %@>", NSStringFromClass([self class]), self, attributes];
+}
+
+@end
+
+@implementation HPRPCClient
+
+#pragma mark - Initialization
+
+-(id)initWithBaseURL:(nullable NSURL *)baseURL accessToken:(nullable NSString *)accessToken {
+    if (self = [super init]) {
+        self.baseURL = baseURL;
+        self.accessToken = accessToken;
+        self.session = [NSURLSession sessionWithConfiguration:NSURLSessionConfiguration.ephemeralSessionConfiguration];
+    }
+    
+    return self;
+}
+
+#pragma mark - Public interface
+
+-(BOOL)hasCredentials {
+    return (self.baseURL != nil && self.accessToken != nil);
+}
+
+-(BOOL)call:(nullable NSString *)callId method:(NSString *)method params:(NSArray *)params endopoint:(nullable NSString *)endpoint completionHandler:(HPRPCClientCompletionHandler)completionHandler {
+    if (self.baseURL == nil) {
+        return NO;
+    }
+    
+    if (callId == nil) {
+        callId = [[NSUUID UUID] UUIDString];
+    }
+    
+    if (endpoint == nil) {
+        endpoint = @"/rpc/";
+    }
+    
+    NSBundle *mainBundle = [NSBundle mainBundle];
+
+    NSDictionary *payload = @{
+        @"jsonrpc": @"2.0",
+        @"id": callId,
+        @"method": method,
+        @"params": params,
+    };
+    
+    NSError *error;
+    NSData *jsonPayload = [NSJSONSerialization dataWithJSONObject:payload options:0 error:&error];
+    if (!jsonPayload) {
+        NSLog(@"-[HPRPCClient call:method:params:endpoint:] Unable to serialize payload: error=`%@`", error);
+        HPRPCCallResult *result = [[HPRPCCallResult alloc] init];
+        result.error = error;
+
+        if (self.delegate != nil) {
+            [self.delegate rpcClientDidReceiveResult:result callId:callId];
+        }
+
+        return NO;
+    }
+    
+    NSURLComponents *urlComponents = [NSURLComponents componentsWithURL:[self.baseURL URLByAppendingPathComponent:endpoint] resolvingAgainstBaseURL:NO];
+    urlComponents.queryItems = @[
+        [NSURLQueryItem queryItemWithName:@"method" value:method],
+    ];
+    
+    NSURL *callURL = [urlComponents URL];
+#ifdef DEBUG
+    NSLog(@"-[HPRPCClient call:method:params:endpoint:] callURL=`%@`", callURL.absoluteString);
+#endif
+    
+    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:callURL];
+    request.HTTPMethod = @"POST";
+    request.HTTPBody = jsonPayload;
+
+    [request setValue:@"application/json;charset=utf-8" forHTTPHeaderField:@"Content-Type"];
+    [request setValue:[[mainBundle infoDictionary] valueForKey:@"HPRPCClientOrigin"] forHTTPHeaderField:@"Origin"];
+    
+    if (self.accessToken != nil) {
+        NSString *authorization = [NSString stringWithFormat:@"Bearer %@", self.accessToken];
+        [request setValue:authorization forHTTPHeaderField:@"Authorization"];
+    }
+    
+    NSString *build = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleVersion"];
+    NSString *userAgent = [NSString stringWithFormat:@"HotPocket/%@", build];
+    [request setValue:userAgent forHTTPHeaderField:@"User-Agent"];
+    
+    NSURLSessionDataTask *task = [self.session dataTaskWithRequest:request
+                                                 completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
+        HPRPCCallResult *result = [[HPRPCCallResult alloc] init];
+        if (error != nil) {
+            result.error = error;
+        } else {
+            NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
+            if (httpResponse.statusCode != 200) {
+                result.error = [[NSError alloc] initWithDomain:@"pl.bthlabs.HotPocket.HPRPCClient" code:-32000 userInfo:@{
+                    @"callId": callId,
+                    @"url": httpResponse.URL,
+                    @"statusCode": [NSNumber numberWithInteger:httpResponse.statusCode],
+                    @"response": response,
+                }];
+            } else {
+                NSError *jsonDecodeError;
+                NSDictionary *callResult = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingTopLevelDictionaryAssumed error:&error];
+                if (jsonDecodeError != nil) {
+                    result.error = jsonDecodeError;
+                } else {
+                    NSDictionary *rpcError = [callResult valueForKey:@"error"];
+                    if (rpcError != nil) {
+                        NSNumber *rpcErrorCode = [rpcError valueForKey:@"code"];
+                        if (rpcErrorCode == nil) {
+                            rpcErrorCode = [NSNumber numberWithInt:-32000];
+                        }
+
+                        result.error = [[NSError alloc] initWithDomain:@"pl.bthlabs.HotPocket.HPRPCClient" code:[rpcErrorCode integerValue] userInfo:rpcError];
+                    } else {
+                        result.result = [callResult valueForKey:@"result"];
+                    }
+                }
+            }
+        }
+        
+        if (completionHandler) {
+            completionHandler(callId, result);
+        }
+    }];
+    [task resume];
+
+    return YES;
+}
+
+-(BOOL)call:(nullable NSString *)callId method:(NSString *)method params:(NSArray *)params endopoint:(nullable NSString *)endpoint {
+    return [self call:callId method:method params:params endopoint:endpoint completionHandler:^(NSString *callId, HPRPCCallResult *result) {
+        if (self.delegate != nil) {
+            [self.delegate rpcClientDidReceiveResult:result callId:callId];
+        }
+    }];
+}
+
+-(BOOL)call:(nullable NSString *)callId method:(NSString *)method params:(NSArray *)params {
+    return [self call:callId method:method params:params endopoint:nil];
+}
+
+-(BOOL)call:(nullable NSString *)callId method:(NSString *)method params:(NSArray *)params completionHandler:(HPRPCClientCompletionHandler)completionHandler {
+    return [self call:callId method:method params:params endopoint:nil completionHandler:completionHandler];
+}
+
+@end
--- a/(App)/NSURL+HotPocketExtensions.h
+++ b/(App)/NSURL+HotPocketExtensions.h
@@ -0,0 +1,18 @@
+//
+//  NSURL+HotPocketExtensions.h
+//  HotPocket (macOS)
+//
+//  Created by Tomek Wójcik on 30/09/2025.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface NSURL (HotPocketExtensions)
+
+-(BOOL)isUsableInHotPocket;
+
+@end
+
+NS_ASSUME_NONNULL_END
--- a/(App)/NSURL+HotPocketExtensions.m
+++ b/(App)/NSURL+HotPocketExtensions.m
@@ -0,0 +1,30 @@
+//
+//  NSURL+HotPocketExtensions.m
+//  HotPocket (macOS)
+//
+//  Created by Tomek Wójcik on 30/09/2025.
+//
+
+#import "NSURL+HotPocketExtensions.h"
+
+@implementation NSURL (HotPocketExtensions)
+
+-(BOOL)isUsableInHotPocket {
+    static NSArray *supportedSchemes = @[@"http", @"https"];
+
+    if (self.baseURL != nil) {
+        return NO;
+    }
+    
+    if (self.scheme == nil || [supportedSchemes containsObject:self.scheme] == NO) {
+        return NO;
+    }
+    
+    if (self.host == nil || [@"" isEqualToString:self.host] == YES) {
+        return NO;
+    }
+    
+    return YES;
+}
+
+@end
--- a/(App)/Resources/Base.lproj/Main.html
+++ b/(App)/Resources/Base.lproj/Main.html
@@ -1,20 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
-    <meta http-equiv="Content-Security-Policy" content="default-src 'self'">
-
-    <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
-
-    <link rel="stylesheet" href="../Style.css">
-    <script src="../Script.js" defer></script>
-</head>
-<body>
-    <img src="../icon-mac-384.png" width="128" height="128" alt="HotPocket Icon">
-    <p class="platform-ios">You can turn on Save to Hotpocket Safari extension in Settings.</p>
-    <p class="platform-mac state-unknown">You can turn on Save to Hotpocket extension in Safari Extensions preferences.</p>
-    <p class="platform-mac state-on">Save to Hotpocket extension is currently on. You can turn it off in Safari Extensions preferences.</p>
-    <p class="platform-mac state-off">Save to Hotpocket extension is currently off. You can turn it on in Safari Extensions preferences.</p>
-    <button class="platform-mac open-preferences">Quit and Open Safari Extensions Preferences…</button>
-</body>
-</html>
--- a/(App)/Resources/Script.js
+++ b/(App)/Resources/Script.js
@@ -1,24 +0,0 @@
-function show(platform, enabled, useSettingsInsteadOfPreferences) {
-    document.body.classList.add(`platform-${platform}`);
-
-    if (useSettingsInsteadOfPreferences) {
-        document.getElementsByClassName('platform-mac state-on')[0].innerText = "Save to Hotpocket extension is currently on. You can turn it off in the Extensions section of Safari Settings.";
-        document.getElementsByClassName('platform-mac state-off')[0].innerText = "Save to Hotpocket extension is currently off. You can turn it on in the Extensions section of Safari Settings.";
-        document.getElementsByClassName('platform-mac state-unknown')[0].innerText = "You can turn on Save to Hotpocket extension in the Extensions section of Safari Settings.";
-        document.getElementsByClassName('platform-mac open-preferences')[0].innerText = "Quit and Open Safari Settings…";
-    }
-
-    if (typeof enabled === "boolean") {
-        document.body.classList.toggle(`state-on`, enabled);
-        document.body.classList.toggle(`state-off`, !enabled);
-    } else {
-        document.body.classList.remove(`state-on`);
-        document.body.classList.remove(`state-off`);
-    }
-}
-
-function openPreferences() {
-    webkit.messageHandlers.controller.postMessage("open-preferences");
-}
-
-document.querySelector("button.open-preferences").addEventListener("click", openPreferences);
--- a/(App)/Resources/Style.css
+++ b/(App)/Resources/Style.css
@@ -1,63 +0,0 @@
-* {
-    -webkit-user-select: none;
-    -webkit-user-drag: none;
-    cursor: default;
-}
-
-:root {
-    color-scheme: light dark;
-
-    --spacing: 20px;
-}
-
-html {
-    height: 100%;
-}
-
-body {
-    background: #212529;
-    color: white;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    flex-direction: column;
-
-    gap: var(--spacing);
-    margin: 0 calc(var(--spacing) * 2);
-    height: 100%;
-
-    font: -apple-system-short-body;
-    text-align: center;
-}
-
-body:not(.platform-mac, .platform-ios) :is(.platform-mac, .platform-ios) {
-    display: none;
-}
-
-body.platform-ios .platform-mac {
-    display: none;
-}
-
-body.platform-mac .platform-ios {
-    display: none;
-}
-
-body.platform-ios .platform-mac {
-    display: none;
-}
-
-body:not(.state-on, .state-off) :is(.state-on, .state-off) {
-    display: none;
-}
-
-body.state-on :is(.state-off, .state-unknown) {
-    display: none;
-}
-
-body.state-off :is(.state-on, .state-unknown) {
-    display: none;
-}
-
-button {
-    font-size: 1em;
-}
--- a/(App)/ViewController.h
+++ b/(App)/ViewController.h
@@ -1,26 +0,0 @@
-//
-//  ViewController.h
-//  Shared (App)
-//
-//  Created by Tomek Wójcik on 21/08/2025.
-//
-
-#import <TargetConditionals.h>
-
-#if TARGET_OS_IOS
-
-#import <UIKit/UIKit.h>
-
-typedef UIViewController PlatformViewController;
-
-#elif TARGET_OS_OSX
-
-#import <Cocoa/Cocoa.h>
-
-typedef NSViewController PlatformViewController;
-
-#endif
-
-@interface ViewController : PlatformViewController
-
-@end
--- a/(App)/ViewController.m
+++ b/(App)/ViewController.m
@@ -1,76 +0,0 @@
-//
-//  ViewController.m
-//  Shared (App)
-//
-//  Created by Tomek Wójcik on 21/08/2025.
-//
-
-#import "ViewController.h"
-
-#import <WebKit/WebKit.h>
-
-#if TARGET_OS_OSX
-#import <SafariServices/SafariServices.h>
-#endif
-
-static NSString * const extensionBundleIdentifier = @"pl.bthlabs.HotPocket.HotPocket.Extension";
-
-@interface ViewController () <WKNavigationDelegate, WKScriptMessageHandler>
-
-@property (nonatomic) IBOutlet WKWebView *webView;
-
-@end
-
-@implementation ViewController
-
- (void)viewDidLoad {
-    [super viewDidLoad];
-
-    _webView.navigationDelegate = self;
-
-#if TARGET_OS_IOS
-    _webView.scrollView.scrollEnabled = NO;
-#endif
-
-    [_webView.configuration.userContentController addScriptMessageHandler:self name:@"controller"];
-
-    [_webView loadFileURL:[NSBundle.mainBundle URLForResource:@"Main" withExtension:@"html"] allowingReadAccessToURL:NSBundle.mainBundle.resourceURL];
-}
-
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation {
-#if TARGET_OS_IOS
-    [webView evaluateJavaScript:@"show('ios')" completionHandler:nil];
-#elif TARGET_OS_OSX
-    [webView evaluateJavaScript:@"show('mac')" completionHandler:nil];
-
-    [SFSafariExtensionManager getStateOfSafariExtensionWithIdentifier:extensionBundleIdentifier completionHandler:^(SFSafariExtensionState *state, NSError *error) {
-        dispatch_async(dispatch_get_main_queue(), ^{
-            if (!state) {
-                // Insert code to inform the user something went wrong.
-                return;
-            }
-
-            NSString *isExtensionEnabledAsString = state.isEnabled ? @"true" : @"false";
-            if (@available(macOS 13, *))
-                [webView evaluateJavaScript:[NSString stringWithFormat:@"show('mac', %@, true)", isExtensionEnabledAsString] completionHandler:nil];
-            else
-                [webView evaluateJavaScript:[NSString stringWithFormat:@"show('mac', %@, false)", isExtensionEnabledAsString] completionHandler:nil];
-        });
-    }];
-#endif
-}
-
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message {
-#if TARGET_OS_OSX
-    if (![message.body isEqualToString:@"open-preferences"])
-        return;
-
-    [SFSafariApplication showPreferencesForExtensionWithIdentifier:extensionBundleIdentifier completionHandler:^(NSError *error) {
-        dispatch_async(dispatch_get_main_queue(), ^{
-            [NSApp terminate:self];
-        });
-    }];
-#endif
-}
-
-@end