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/*
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* Copyright 2020 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#import "GoogleDataTransport/GDTCORLibrary/Internal/GDTCORDirectorySizeTracker.h"
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@interface GDTCORDirectorySizeTracker ()
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/** The observed directory path. */
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@property(nonatomic, readonly) NSString *directoryPath;
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/** The cached content size of the observed directory. */
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@property(nonatomic, nullable) NSNumber *cachedSizeBytes;
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@end
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@implementation GDTCORDirectorySizeTracker
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- (instancetype)initWithDirectoryPath:(NSString *)path {
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self = [super init];
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if (self) {
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_directoryPath = path;
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}
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return self;
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}
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- (GDTCORStorageSizeBytes)directoryContentSize {
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if (self.cachedSizeBytes == nil) {
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self.cachedSizeBytes = @([self calculateDirectoryContentSize]);
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}
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return self.cachedSizeBytes.unsignedLongLongValue;
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}
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- (void)fileWasAddedAtPath:(NSString *)path withSize:(GDTCORStorageSizeBytes)fileSize {
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if (![path hasPrefix:self.directoryPath]) {
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// Ignore because the file is not inside the directory.
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return;
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}
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self.cachedSizeBytes = @([self directoryContentSize] + fileSize);
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}
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- (void)fileWasRemovedAtPath:(NSString *)path withSize:(GDTCORStorageSizeBytes)fileSize {
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if (![path hasPrefix:self.directoryPath]) {
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// Ignore because the file is not inside the directory.
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return;
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}
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self.cachedSizeBytes = @([self directoryContentSize] - fileSize);
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}
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- (void)resetCachedSize {
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self.cachedSizeBytes = nil;
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}
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- (GDTCORStorageSizeBytes)calculateDirectoryContentSize {
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NSArray *prefetchedProperties = @[ NSURLIsRegularFileKey, NSURLFileSizeKey ];
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uint64_t totalBytes = 0;
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NSURL *directoryURL = [NSURL fileURLWithPath:self.directoryPath];
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NSDirectoryEnumerator *enumerator = [[NSFileManager defaultManager]
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enumeratorAtURL:directoryURL
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includingPropertiesForKeys:prefetchedProperties
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options:NSDirectoryEnumerationSkipsHiddenFiles
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errorHandler:^BOOL(NSURL *_Nonnull url, NSError *_Nonnull error) {
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return YES;
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}];
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for (NSURL *fileURL in enumerator) {
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@autoreleasepool {
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NSNumber *isRegularFile;
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[fileURL getResourceValue:&isRegularFile forKey:NSURLIsRegularFileKey error:nil];
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if (isRegularFile.boolValue) {
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totalBytes += [self fileSizeAtURL:fileURL];
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}
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}
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}
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return totalBytes;
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}
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- (GDTCORStorageSizeBytes)fileSizeAtURL:(NSURL *)fileURL {
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NSNumber *fileSize;
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[fileURL getResourceValue:&fileSize forKey:NSURLFileSizeKey error:nil];
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return fileSize.unsignedLongLongValue;
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}
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@end
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