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BTHLABS-58: Share Extension in Apple Apps

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Tomek Wójcik
2025-10-04 08:02:13 +02:00
parent 0c12f52569
commit 99e9226338
122 changed files with 5488 additions and 411 deletions
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27
services/apple/Shared (Share Extension)/HPShareExtensionHelper.h Normal file
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//
// HPShareExtensionHelper.h
// HotPocket
//
// Created by Tomek Wójcik on 27/09/2025.
//
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
@class HPSharedItemsContainer;
typedef void (^HPShareExtensionHelperHandleItemsCompletionHandler)(NSURL * _Nullable url);
@interface HPShareExtensionHelper : NSObject
@property NSExtensionContext *context;
@property HPSharedItemsContainer *items;
-(instancetype)initWithContext:(NSExtensionContext *)context;
-(void)processItems:(HPShareExtensionHelperHandleItemsCompletionHandler)completionHandler;
@end
NS_ASSUME_NONNULL_END

102
services/apple/Shared (Share Extension)/HPShareExtensionHelper.m Normal file
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//
// HPShareExtensionHelper.m
// HotPocket
//
// Created by Tomek Wójcik on 27/09/2025.
//
#import <UniformTypeIdentifiers/UniformTypeIdentifiers.h>
#import "HPShareExtensionHelper.h"
#import "HPSharedItem.h"
#import "HPSharedItemsContainer.h"
@implementation HPShareExtensionHelper (HPShareExtensionHelperPrivate)
@end
@implementation HPShareExtensionHelper
-(instancetype)initWithContext:(NSExtensionContext *)context {
if (self = [super init]) {
self.context = context;
self.items = [[HPSharedItemsContainer alloc] init];
}
return self;
}
-(void)processItems:(HPShareExtensionHelperHandleItemsCompletionHandler)completionHandler {
// Depending on the app, the URL might be stored in `public.url` attachment or elsewhere.
// For example, the YouTube app passes it in `public.plain-text`. Because of course it does.
// Furthermore, for some bizarre reason the recommended way of extracting the URL when sharing from a browser
// is to run a JS snippet and examine its output.
// This method will iterate through all the shared items and their attachments and attempt to extract
// the URL candidates.
//
// Also note that handler for `public.url` explicitly requests the payload to be corced to `NSURL *`. Leaving it
// at `NSData *` would cause iOS to, wait for it!, fetch the URL and dump the response body in the payload :D.
//
// This is so _so_ *so* dumb. But hey, at least I learned how to to "chords" in CGD ¯\_(ツ)_/¯
UTType *propertyListType = [UTType typeWithFilenameExtension:@"plist"];
dispatch_group_t dispatchGroup = dispatch_group_create();
dispatch_queue_t queue = dispatch_queue_create("HPShareExtensionHelper.processItems.queue", DISPATCH_QUEUE_SERIAL);
for (NSExtensionItem *inputItem in self.context.inputItems) {
#ifdef DEBUG
NSLog(@"-[HPShareExtensionHelper processItems:] inputItem.userInfo=`%@`", inputItem);
#endif
[inputItem.attachments enumerateObjectsUsingBlock:^(NSItemProvider *attachment, NSUInteger index, BOOL *stop) {
dispatch_group_enter(dispatchGroup);
if ([attachment hasItemConformingToTypeIdentifier:propertyListType.identifier] == YES) {
[attachment loadItemForTypeIdentifier:propertyListType.identifier
options:nil
completionHandler:^(NSDictionary *payload, NSError *error) {
dispatch_async(queue, ^{
self.items.primaryItem = [[HPSharedItem alloc] initWithPayload:payload
typeIdentifier:propertyListType.identifier
error:error];
dispatch_group_leave(dispatchGroup);
});
}];
} else if ([attachment hasItemConformingToTypeIdentifier:@"public.url"] == YES) {
[attachment loadItemForTypeIdentifier:@"public.url"
options:nil
completionHandler:^(NSURL *payload, NSError *error) {
dispatch_async(queue, ^{
[self.items.candidateItems addObject:[[HPSharedItem alloc] initWithPayload:payload
typeIdentifier:@"public.url"
error:error]];
dispatch_group_leave(dispatchGroup);
});
}];
} else if ([attachment hasItemConformingToTypeIdentifier:@"public.plain-text"] == YES) {
[attachment loadItemForTypeIdentifier:@"public.plain-text"
options:nil
completionHandler:^(NSString *payload, NSError *error) {
dispatch_async(queue, ^{
[self.items.candidateItems addObject:[[HPSharedItem alloc] initWithPayload:payload
typeIdentifier:@"public.plain-text"
error:error]];
dispatch_group_leave(dispatchGroup);
});
}];
} else {
dispatch_group_leave(dispatchGroup);
}
}];
dispatch_group_notify(dispatchGroup, dispatch_get_main_queue(), ^{
NSURL *result = [self.items resolveURL];
completionHandler(result);
});
}
}
@end

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services/apple/Shared (Share Extension)/HPSharedItem.h Normal file
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//
// HPSharedItem.h
// HotPocket
//
// Created by Tomek Wójcik on 27/09/2025.
//
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
@interface HPSharedItem : NSObject
@property (nullable) id payload;
@property NSString *typeIdentifier;
@property (nullable) NSError *error;
-(instancetype)initWithPayload:(nullable id)payload typeIdentifier:(NSString *)typeIdentifier error:(nullable NSError *)error;
-(NSURL *)maybeURL;
@end
NS_ASSUME_NONNULL_END

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services/apple/Shared (Share Extension)/HPSharedItem.m Normal file
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//
// HPSharedItem.m
// HotPocket
//
// Created by Tomek Wójcik on 27/09/2025.
//
#import <UniformTypeIdentifiers/UniformTypeIdentifiers.h>
#import "HPSharedItem.h"
@implementation HPSharedItem
-(instancetype)initWithPayload:(id)payload typeIdentifier:(NSString *)typeIdentifier error:(NSError *)error {
if (self = [super init]) {
self.payload = payload;
self.typeIdentifier = typeIdentifier;
self.error = error;
}
return self;
}
-(NSURL *)maybeURL {
if (self.error != nil) {
return nil;
}
if ([self.typeIdentifier isEqualToString:[UTType typeWithFilenameExtension:@"plist"].identifier] == YES) {
NSDictionary *propertyList = self.payload;
NSDictionary *jsHelperResult = [propertyList valueForKey:NSExtensionJavaScriptPreprocessingResultsKey];
if ([jsHelperResult valueForKey:@"iHateComputers"] == nil) {
return nil;
}
return [NSURL URLWithString:[jsHelperResult valueForKey:@"url"]];
} else if ([self.typeIdentifier isEqualToString:@"public.url"] == YES) {
return self.payload;
} if ([self.typeIdentifier isEqualToString:@"public.plain-text"] == YES) {
return [NSURL URLWithString:self.payload];
}
return nil;
}
@end

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services/apple/Shared (Share Extension)/HPSharedItemsContainer.h Normal file
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//
// HPSharedItemsContainer.h
// HotPocket
//
// Created by Tomek Wójcik on 27/09/2025.
//
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
@class HPSharedItem;
@interface HPSharedItemsContainer : NSObject
@property (nullable) HPSharedItem *primaryItem;
@property NSMutableArray<HPSharedItem *> *candidateItems;
-(NSURL *)resolveURL;
@end
NS_ASSUME_NONNULL_END

63
services/apple/Shared (Share Extension)/HPSharedItemsContainer.m Normal file
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//
// HPSharedItemsContainer.m
// HotPocket
//
// Created by Tomek Wójcik on 27/09/2025.
//
#import "HPSharedItemsContainer.h"
#import "HPSharedItem.h"
#import "NSURL+HotPocketExtensions.h"
@implementation HPSharedItemsContainer (HPSharedItemsContainerPrivate)
-(NSURL *)validatedURL:(NSURL *)url {
if (url.isUsableInHotPocket == NO) {
return nil;
}
return url;
}
@end
@implementation HPSharedItemsContainer
-(instancetype)init {
if (self = [super init]) {
self.primaryItem = nil;
self.candidateItems = [[NSMutableArray alloc] initWithCapacity:1];
}
return self;
}
-(NSURL *)resolveURL {
NSURL *result = nil;
if (self.primaryItem != nil) {
result = [self validatedURL:[self.primaryItem maybeURL]];
}
if ([self.candidateItems count] > 0) {
NSUInteger itemCandidateIndex = 0;
while (result == nil) {
HPSharedItem *itemCandidate = [self.candidateItems objectAtIndex:itemCandidateIndex];
result = [self validatedURL:itemCandidate.maybeURL];
if (result != nil) {
break;
}
itemCandidateIndex += 1;
if (itemCandidateIndex >= [self.candidateItems count]) {
break;
}
}
}
return result;
}
@end