command.cpp

标准C++编写的小小CRM软件,无任何平台依赖.采用标准XML作为数据库.只需重新纺译,可在任何平台上运行.目前测试过在GCC和VC下都可以编译通过

#include "command.h"
#include "Project.h"

bool execCommand(const string& cmd)
/* executing command.									*/
{
	istrstream cmdStream( cmd.data(),cmd.size() );
	string cmdPart;
	cmdStream>>cmdPart;
	if( cmdPart.size() == 0 )		{	return true;			}
	
	if	( cmdPart == "quit" )		{	exit(0);				}
	else if	( cmdPart == "help" )	{	
		if ( cmdStream>>cmdPart )	{	helpCommand( cmdPart );	}
		else						{	helpCommand( cmd );		}
	}
	else if	( cmdPart == "backup" )	{
		if ( cmdStream>>cmdPart )	{	backupCommand();		}
		else						{	backupCommand(cmd);		}
	}
	else if ( cmdPart == "find"  )	{	findCommand(cmd);		}
	else if ( cmdPart == "project" ){	projectCommand(cmd);	}
	else if ( cmdPart == "customer"){	customerCommand(cmd);	}
	else{
		cout<<"Sorry, I don't understand your command, ";
		cout<<"type help for more information."<<endl;
	}
	return true;
}

bool helpCommand(const string& cmd)
/* find and display help message about command (or keyword). */
{
	string buf;
	ifstream helpFile;
		
	helpFile.open( "help.xml" );
	if( !helpFile.is_open() ){
		cerr<<"help document not found."<<endl;
		return false;
	}
	while( getline( helpFile,buf,'>' ) ){
		if( buf == cmd ){		// match keyword
			getline( helpFile, buf, '<' );
			cout<<buf;
			return true;
		}
		getline( helpFile, buf, '<' );	// clear follow part
	}
	cout<<"sorry, I can't find help message about you keyword."<<endl;
	return false;
}

bool backupCommand( )
{
	string path;
	cout <<  "Plear input backup path end with backup filename: ";
	cin >> path;
	return backupCommand( path );
}

bool backupCommand(const string& path)
/* backup database file, success return true, else return false.	*/
{
	char ch;
	ifstream dbFile;
	ofstream backupStream;
	
	if ( path.find( ".xml")==path.length()-4 ){	// path valid.
		backupStream.open( path.data() );	
		if( dbFile.fail() ){
			cout<< "create backup file false."<<endl;
			return false;
		}
		dbFile.open( "customer.xml" );
		if( dbFile.fail() ){	
			cout<< "open customer database file error."<<endl;
			return false;
		}
		while( (ch=dbFile.get())!=EOF )
		{	backupStream.put( ch );		}
		return true;
	}else{
		cerr<<"path invalid,please end with '.xml'."<<endl;
		return false;	
	}
}

bool findCommand( const string& cmd )
{
	Customer customer;
	string arg1,arg2;
	unsigned  id=0;
	istrstream cmdStream( cmd.data(), cmd.size() );
	typedef pair<string,string> str_Pair;
	map<string,string> str_Map;

	cmdStream>>arg1;		// clear string "query"
	while( cmdStream>>arg1 ){
		if( arg1[0]=='-' ){
			arg1.erase( arg1.begin() );
			/* normal query */
			if( ( arg1=="normal" || arg1== "n" ) && cmdStream>>arg2 )	
			{	return customer.display( arg2 );		}
			/* fuzzy query */ 
			else if( ( arg1== "fuzzy" || arg1=="f" ) && cmdStream>>arg2 )	
			{	return customer.displayf( arg2 );			}
			/*  high-level query */
			else if( arg1 == "id" && cmdStream >> id )
			{	return customer.display( id );		}
			else if( arg1=="high" || arg1=="h" ){				
				while( cmdStream>>arg1 ){
					if( arg1[0]=='-' && cmdStream>>arg2 ){
						arg1.erase( arg1.begin() );
						str_Map.insert( str_Pair(arg1,arg2) );
					}
				}
				if( str_Map.size()!=0 )
				{	return customer.display( str_Map );		}
			}
		}
	}
	cerr<<"query format invalid."<<endl;
	return false;
}

bool projectCommand( const string& cmd )
/* manage project, manage success return true, else return false.	*/
{
	istrstream istr( cmd.data(), cmd.size() );
	Project project;
	string  arg1,arg2;
	int     id;

	istr>>arg1;
	if( istr>>arg1 )	{						
		if( ( arg1 == "-add" || arg1 == "-a" ) && istr >> arg2 )
		{	return project.add( arg2 );		}		// add a project
		else if( ( arg1 == "-delete" || arg1 == "-d" ) && istr >> arg2 )
		{	return project.del( arg2 );		}		// delete a proejct
		else if( arg1 == "-change" || arg1 == "-c" ){
			if( istr >> arg1 >> arg2 )
			{	return project.chg( arg1, arg2 );}	// chagnge project's name
		}
		else if( istr >> arg2 ){
			if( arg2 == "-join" || arg2 == "-j" ){			
				while( istr >> id )					// join customer to project
				{	project.joinCustomer( arg1, id );	}
				return true;
			}			
			else if( arg2=="-remove" || arg2 == "-r" ){
				while( istr >> id )					// remove customer from project
				{	project.remCustomer( arg1, id );	}
				return true;
			}											
		}
		else
		{	return project.display( arg1 );		}
	}
	else
	{	return project.display();		}

	cerr << " invalid command format." << endl;
	return true;
}

bool customerCommand( const string& cmd )
/* manage customers. success return true, else return false.	*/
{
	istrstream istr( cmd.data(), cmd.size() );
	Customer customer;
	string arg1,arg2;
	int    id;

	istr>>arg1;		// clear first argument
	if( istr>>arg1 )	{
		if( '-' == arg1[0] ){	// condition command.
			if( arg1 == "-add" )
				{	return customer.add();	}
			else if( arg1=="-del" ){
				while( istr >> id )
				{	customer.del( id );		}
				return true;
			}
			else if( arg1 == "-change" && istr>>id )
			{	return customer.chg( id );	}
		}
		else if ( istr>> id ){
			return customer.display( id );
		}
	}

	cerr << " invalid command format." << endl;
	return true;

}