#define kPath_ImageSizeDict @"ImageSizeDict"

#define kImageSizeManager_maxCount 1000

#define kImageSizeManager_resetCount (kImageSizeManager_maxCount/2)

#import "ImageSizeManager.h"

@interface ImageSizeManager ()

@property (strong, nonatomic) NSMutableDictionary *imageSizeDict;

@implementation ImageSizeManager

+ (instancetype)shareManager{

static ImageSizeManager *shared_manager = nil;

static dispatch_once_t pred;

dispatch_once(&pred, ^{

shared_manager = [[self alloc] init];

[shared_manager read];

});

return shared_manager;

}

- (NSMutableDictionary *)read{

if (!_imageSizeDict) {

NSString *abslutePath = [NSString stringWithFormat:@"%@/%@.plist", [NSObject pathInCacheDirectory:kPath_ImageSizeDict], kPath_ImageSizeDict];

_imageSizeDict = [NSMutableDictionary dictionaryWithContentsOfFile:abslutePath];

if (!_imageSizeDict) {

_imageSizeDict = [NSMutableDictionary dictionary];

}

}

return _imageSizeDict;

}

- (BOOL)save{

if (_imageSizeDict) {

if ([NSObject createDirInCache:kPath_ImageSizeDict]) {

NSString *abslutePath = [NSString stringWithFormat:@"%@/%@.plist", [NSObject pathInCacheDirectory:kPath_ImageSizeDict], kPath_ImageSizeDict];

return [_imageSizeDict writeToFile:abslutePath atomically:YES];

}

}

return NO;

}

- (void)saveImage:(NSString *)imagePath size:(CGSize)size{

if (imagePath && ![_imageSizeDict objectForKey:imagePath]) {

[_imageSizeDict setObject:[NSNumber numberWithFloat:size.height/size.width] forKey:imagePath];

}

}

- (CGFloat)sizeOfImage:(NSString *)imagePath{

CGFloat imageSize = 1;

NSNumber *sizeValue = [_imageSizeDict objectForKey:imagePath];

if (sizeValue) {

imageSize = sizeValue.floatValue;

}

return imageSize;

}

- (BOOL)hasSrc:(NSString *)src{

NSNumber *sizeValue = [_imageSizeDict objectForKey:src];

BOOL hasSrc = NO;

if (sizeValue) {

hasSrc = YES;

}

return hasSrc;

}

#pragma mark Image Resize (used in tweet and message)

- (CGSize)sizeWithImageH_W:(CGFloat)height_width originalWidth:(CGFloat)originalWidth{

CGSize reSize = CGSizeZero;

reSize.width = originalWidth;

reSize.height = originalWidth *height_width;

return reSize;

}

- (CGSize)sizeWithSrc:(NSString *)src originalWidth:(CGFloat)originalWidth maxHeight:(CGFloat)maxHeight{

CGSize reSize = [self sizeWithImageH_W:[self sizeOfImage:src] originalWidth:originalWidth];

if (reSize.height > maxHeight) {

reSize.height = maxHeight;

}

return reSize;

}

- (CGSize)sizeWithImage:(UIImage *)image originalWidth:(CGFloat)originalWidth maxHeight:(CGFloat)maxHeight{

CGSize reSize = [self sizeWithImageH_W:(image.size.height/image.size.width) originalWidth:originalWidth];

if (reSize.height > maxHeight) {

reSize.height = maxHeight;

}

return reSize;

}

- (CGSize)sizeWithSrc:(NSString *)src originalWidth:(CGFloat)originalWidth maxHeight:(CGFloat)maxHeight minWidth:(CGFloat)minWidth{

CGSize reSize = [self sizeWithImageH_W:[self sizeOfImage:src] originalWidth:originalWidth];

CGFloat scale = maxHeight/reSize.height;

if (scale < 1) {

reSize = CGSizeMake(reSize.width *scale, reSize.height*scale);

}

if (reSize.width < minWidth) {

reSize.width = minWidth;

}

return reSize;

}