real-e-party-iOS/YuMi/CustomUI/Adbvertise/XPAdImageTool.m

//
//  YMAdImageTool.m
//  YUMI
//
//  Created by YUMI on 2022/10/31.
//

#import "XPAdImageTool.h"
#import <YYCache/YYCache.h>
#import "UploadFile.h"

#define CACHENAME @"XPUserCache"

UIKIT_EXTERN NSString * const adImageName;
@interface XPAdImageTool ()
@property (nonatomic, strong) YYCache *yyCache;
///广告信息
@property (nonatomic,strong) AdvertiseModel *infoModel;
@end

static XPAdImageTool* tool;
@implementation XPAdImageTool

+ (instancetype)shareImageTool {
	static dispatch_once_t onceToken;
	dispatch_once(&onceToken, ^{
		tool = [[XPAdImageTool alloc] init];
	});
	return  tool;
}

- (instancetype)init
{
	self = [super init];
	if (self) {
		self.yyCache = [YYCache cacheWithName:CACHENAME];
	}
	return self;
}

//去除广告信息
- (AdvertiseModel *)getAdInfoFromCacheInMainWith:(NSString *)link {
	if (link.length > 0) {
		if ([self.yyCache containsObjectForKey:link]) {
			return (AdvertiseModel *)[self.yyCache objectForKey:link];
		}else {
			return nil;
		}
	}else {
		return nil;
	}
	return nil;
}


///保存信息
- (void)saveAdInfo:(AdvertiseModel *)adInfo {
	self.infoModel = adInfo;
	NSArray *stringArr = [adInfo.pict componentsSeparatedByString:@"/"];
	NSString *key = stringArr.lastObject;
	[self.yyCache setObject:(id<NSCoding> )adInfo forKey:key withBlock:^{

	}];

	[self getAdvertisingImage];
}

/**
 *  判断文件是否存在
 */
- (BOOL)isFileExistWithFilePath:(NSString *)filePath {
	NSFileManager *fileManager = [NSFileManager defaultManager];
	BOOL isDirectory = FALSE;
	return [fileManager fileExistsAtPath:filePath isDirectory:&isDirectory];
}

/**
 *  初始化广告页面
 */
- (void)getAdvertisingImage {

	if (self.infoModel.pict.length > 0) {
		NSString *imageUrl = self.infoModel.pict;
		// 获取图片名
		NSArray *stringArr = [imageUrl componentsSeparatedByString:@"/"];
		NSString *imageName = stringArr.lastObject;

		// 拼接沙盒路径
		NSString *filePath = [self getFilePathWithImageName:imageName];
		BOOL isExist = [self isFileExistWithFilePath:filePath];
		if (!isExist){// 如果该图片不存在，则删除老图片，下载新图片
			[self downloadAdImageWithUrl:imageUrl imageName:imageName];
		}
	}else {
		[self deleteOldImage];
	}
}

/**
 *  下载新图片
 */
- (void)downloadAdImageWithUrl:(NSString *)imageUrl imageName:(NSString *)imageName {
	dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        NSString *filePath = [self getFilePathWithImageName:imageName]; // 保存文件的名称
        
        if ([imageUrl.lowercaseString hasSuffix:@"svga"]) {
            @kWeakify(self);
            [[UploadFile share] download:imageUrl path:filePath complete:^{
                @kStrongify(self);
                [self deleteOldImage];
                [[NSUserDefaults standardUserDefaults] setValue:imageName forKey:adImageName];
                [[NSUserDefaults standardUserDefaults] synchronize];
            } failure:^{
                @kStrongify(self);
                [self deleteOldImage];
            }];
        } else {
            NSString *encode = [imageUrl stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
            NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:encode]];
            UIImage *image = [UIImage imageWithData:data];

            if ([UIImagePNGRepresentation(image) writeToFile:filePath atomically:YES]) {// 保存成功
                [self deleteOldImage];
                [[NSUserDefaults standardUserDefaults] setValue:imageName forKey:adImageName];
                [[NSUserDefaults standardUserDefaults] synchronize];
            }else{
                [self deleteOldImage];
            }
        }
	});
}

/**
 *  删除旧图片
 */
- (void)deleteOldImage {
	NSString *imageName = [[NSUserDefaults standardUserDefaults] valueForKey:adImageName];
	if (imageName) {
		NSString *filePath = [self getFilePathWithImageName:imageName];
		NSFileManager *fileManager = [NSFileManager defaultManager];
		[fileManager removeItemAtPath:filePath error:nil];
	}
}

/**
 *  根据图片名拼接文件路径
 */
- (NSString *)getFilePathWithImageName:(NSString *)imageName {
	if (imageName) {
		NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask, YES);
        NSString *filePath = [[paths xpSafeObjectAtIndex:0] stringByAppendingPathComponent:imageName];

		return filePath;
	}

	return nil;
}
@end