listing.cpp

1.注册功能 2.登录功能 3.退出系统功能 4.发布新广告功能 5.添加子目录功能 6.查找广告功能 7.广告排序功能 8.查看当前目录中的广告 9.查看当前目录及其子目录中的广告

#include <iostream>
#include <vector>
#include <iterator>

using namespace std;

#include "Listing.h"
void Listing::add(Advertisement* ptr)
{
	objects.push_back(ptr);
}
vector<Advertisement*>::iterator Listing::begin()
{
	 return objects.begin();
}
vector<Advertisement*>::iterator Listing::end()
{
	return objects.end();
}
Advertisement* Listing::operator[](const int& number)
{
	iterator adv=objects.begin();
	for(;adv!=objects.end();adv++){
		if((*adv)->getNumber()==number)
			return *adv;
	}
	return NULL;
}
bool sortByEmail(const Advertisement* a,const Advertisement *b)
{
	return (a->getEmail()<b->getEmail());
}
bool sortByStart(const Advertisement* a,const Advertisement *b)
{
	return (a->getStart()<b->getStart());
}
bool sortByClose(const Advertisement* a,const Advertisement *b)
{
	return (a->getClose()<b->getClose());
}
bool sortByQuantity(const Advertisement* a,const Advertisement *b)
{
	return(a->getQuantity()<b->getQuantity());
}
bool sortByHighestBid(Advertisement* a,Advertisement *b)
{
	return(b->getBids().top()<a->getBids().top());
}
bool sortByLowestBid(Advertisement* a,Advertisement *b)
{
	return(a->getBids().top()<b->getBids().top());
}
// return a sorted copy of this Listing
Listing Listing::sort(string field)
{
	Listing::iterator first=begin();
	Listing::iterator last=end();
	if (field=="email") std::sort(first,last,sortByEmail);
	else if(field=="start") std::sort(first,last,sortByStart);
	else if(field=="close") std::sort(first,last,sortByClose);
	else if(field=="quantity") std::sort(first,last,sortByQuantity);
	else if(field=="highest") std::sort(first,last,sortByHighestBid);
	else if(field=="lowest") std::sort(first,last,sortByLowestBid);
	return *this;
}

Listing list;
string key;
void addAdv(Advertisement* a)
{
	
	if (a->getBody().find(key)!=-1||a->getTitle().find(key)!=-1) 

		list.add(a);
}
Listing Listing::filter(string keyword)
{
  if (keyword=="") return *this;
  else {
	  key=keyword;
    Listing::iterator first=begin();
	Listing::iterator last=end();
	list.objects.clear();
	for_each(first,last,addAdv);
	return list;
  }
}