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109 lines
3.5 KiB
Objective-C
109 lines
3.5 KiB
Objective-C
//
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// FileProviderEnumerator.m
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// iSHFiles
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//
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// Created by Theodore Dubois on 9/20/18.
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//
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#import <MobileCoreServices/MobileCoreServices.h>
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#include <dirent.h>
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#import "FileProviderExtension.h"
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#import "FileProviderEnumerator.h"
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#import "FileProviderItem.h"
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#import "NSError+ISHErrno.h"
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#include "fs/fake-db.h"
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@interface FileProviderEnumerator ()
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@property FileProviderItem *item;
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@end
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@implementation FileProviderEnumerator
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- (instancetype)initWithItem:(FileProviderItem *)item {
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if (self = [super init]) {
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self.item = item;
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}
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return self;
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}
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- (void)enumerateItemsForObserver:(id<NSFileProviderEnumerationObserver>)observer startingAtPage:(NSFileProviderPage)page {
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NSLog(@"enumeration start %@", self.item.itemIdentifier);
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// if we're asked to enumerate the working set
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if (self.item == nil) {
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[observer finishEnumeratingUpToPage:page];
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return;
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}
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// if we're asked to enumerate a file
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if (![self.item.typeIdentifier isEqualToString:(NSString *) kUTTypeFolder]) {
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NSLog(@"not enumerating a file (%@)", self.item.typeIdentifier);
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[observer finishEnumeratingUpToPage:page];
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return;
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}
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NSError *error;
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int fd = [self.item openNewFDWithError:&error];
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if (fd == -1) {
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[observer finishEnumeratingWithError:error];
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return;
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}
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DIR *dir = fdopendir(fd);
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NSMutableArray<FileProviderItem *> *items = [NSMutableArray new];
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struct dirent *dirent;
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errno = 0;
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while ((dirent = readdir(dir))) {
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if (strcmp(dirent->d_name, ".") == 0 || strcmp(dirent->d_name, "..") == 0)
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continue;
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// this is annoying
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NSString *path = _item.path;
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NSString *childIdent;
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if (strcmp(dirent->d_name, "..") == 0) {
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childIdent = _item.parentItemIdentifier;
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} else if (strcmp(dirent->d_name, ".") != 0) {
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db_begin(&_item.mount->db);
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inode_t inode = path_get_inode(&_item.mount->db, [path stringByAppendingFormat:@"/%@", [NSString stringWithUTF8String:dirent->d_name]].fileSystemRepresentation);
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db_commit(&_item.mount->db);
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if (inode == 0) {
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NSLog(@"could not find %s in database, assuming nonexistent", dirent->d_name);
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continue;
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}
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childIdent = [NSString stringWithFormat:@"%lu", (unsigned long) inode];
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}
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NSLog(@"returning %s %@", dirent->d_name, childIdent);
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FileProviderItem *item = [[FileProviderItem alloc] initWithIdentifier:childIdent mount:_item.mount error:&error];
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if (item == nil) {
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[observer finishEnumeratingWithError:error];
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closedir(dir);
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return;
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}
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[items addObject:item];
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errno = 0;
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}
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if (errno != 0) {
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NSError *error = [NSError errorWithDomain:NSPOSIXErrorDomain code:errno userInfo:nil];
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NSLog(@"readdir returned %@", error);
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[observer finishEnumeratingWithError:error];
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closedir(dir);
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return;
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}
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closedir(dir);
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NSLog(@"returning %@", items);
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[observer didEnumerateItems:items];
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[observer finishEnumeratingUpToPage:nil];
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}
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- (void)enumerateChangesForObserver:(id<NSFileProviderChangeObserver>)observer fromSyncAnchor:(NSFileProviderSyncAnchor)anchor {
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NSLog(@"saying no file changes");
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// TODO implement by having the sync anchor be a serialized list of files
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[observer finishEnumeratingChangesUpToSyncAnchor:anchor moreComing:NO];
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}
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- (void)invalidate {
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}
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@end
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