examSystem-Anxin/src/app/pipes/size.pipe.ts

import { Pipe, PipeTransform } from '@angular/core';
@Pipe({name: 'size'})
export class SizePipe implements PipeTransform {
    transform(byte: number): string {
        if(byte < 1048576 && byte != 0){//如果小于1M
            let size = byte / 1024
            return size.toFixed(1) + 'KB'
        }
        if(byte >= 1048576 && byte < 1073741824){//如果大于1M 小于1G
            let size = byte / 1048576
            return size.toFixed(1) + 'MB'
        }
        if(byte >= 1073741824){//如果大于1G
            let size = byte / 1073741824
            return size.toFixed(1) + 'GB'
        }
        if(byte < 1048576 && byte == 0){//如果是文件夹
            return '--'
        }
    }
}
@Pipe({name: 'name'})
export class NamePipe implements PipeTransform {
    transform(name: string): string {
        let nameArr = name.split("/")
        return nameArr[nameArr.length - 1]
    }
}
@Pipe({name: 'name2'})
export class NamePipe2 implements PipeTransform {
    transform(name: string): string {
        let nameArr = name.split("/")
        return nameArr[nameArr.length - 2]
    }
}
@Pipe({name: 'name3'})
export class NamePipe3 implements PipeTransform {
    transform(name: string): string {
        if(name.charAt(name.length-1) == "/"){
            return  name.substr(0, name.length - 1).replace(/\//g,'>').substring(9,name.length)
        }else{
            return  name.replace(/\//g,'>').substring(9,name.length)
        }
    }
}