//
//  GIGaFileManager.m
//  GIGA
//
//  Created by lianxiang on 2018/9/18.
//  Copyright © 2018年 com.giga.ios. All rights reserved.
//

#import "GIGaFileManager.h"

@implementation GIGaFileManager

+(void)savaUserAvatorWith:(NSString *)userId image:(UIImage *)image{
    if (!userId) {
        GILog(@"userID nil !!!");
        return;
    }
    NSData*imageData=UIImageJPEGRepresentation(image,1.0f);
    NSString *fullPath=[[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]stringByAppendingPathComponent:userId];
    [imageData writeToFile:fullPath atomically:YES];
    
}

+ (UIImage *)getUserAvatorWith:(NSString *)userId{
    
    if (!userId) {
        GILog(@"userID nil !!!");
        return nil;
    }
    NSString*fullpath=[[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]stringByAppendingPathComponent:userId];
    UIImage*saveImage=[[UIImage alloc]initWithContentsOfFile:fullpath];
    if (!saveImage) {
        saveImage = [UIImage imageNamed:@"img_circle_avatar"];
    }
    return saveImage;
    
}

// 改变图像的尺寸，方便上传服务器
+ (UIImage *) scaleFromImage: (UIImage *) image toSize: (CGSize) size
{
    UIGraphicsBeginImageContext(size);
    [image drawInRect:CGRectMake(0, 0, size.width, size.height)];
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
}
//保持原来的长宽比，生成一个缩略图
+ (UIImage *)thumbnailWithImageWithoutScale:(UIImage *)image size:(CGSize)asize
{
    UIImage *newimage;
    if (nil == image) {
        newimage = nil;
    }
    else{
        CGSize oldsize = image.size;
        CGRect rect;
        if (asize.width/asize.height > oldsize.width/oldsize.height) {
            rect.size.width = asize.width*oldsize.height/oldsize.width;
            // rect.size.height = asize.height*oldsize.height/oldsize.width;
            rect.size.height = asize.width*oldsize.height/oldsize.width;
            rect.origin.x = (asize.width - rect.size.width)/2;
            
            rect.origin.y = 0;
        }
        else{
            //rect.size.width = asize.width;
            rect.size.width = asize.height*oldsize.width/oldsize.height;
            rect.size.height = asize.height*oldsize.width/oldsize.height;
            rect.origin.x = 0;
            rect.origin.y = (asize.height - rect.size.height)/2;
            
        }
        UIGraphicsBeginImageContext(asize);
        CGContextRef context = UIGraphicsGetCurrentContext();
        CGContextSetFillColorWithColor(context, [[UIColor clearColor] CGColor]);
        UIRectFill(CGRectMake(0, 0, asize.width, asize.height));//clear background
        [image drawInRect:rect];
        newimage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
    }
    return newimage;
    
}

@end