grouplist.cpx

/*
Copyright (c) 2008 Radu Andrei Stefan

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

interface

uses includes;

struct grouplistitem
{
	grouplistitem(int p, string n):parent(p),name(n),artfirst(0),artlast(0){;}
	int parent;
	string name;
	int artfirst;
	int artlast;
	vector<int> children;
};

typedef vector<grouplistitem> groupvector;

class grouplist
{
public:
	grouplist();
	~grouplist();
	void loadfromfile(string vfname);
	void savetofile(string vfname);
	int  find(string name, int where=0, int addifneeded=0, string sep="/");
	int  count() { return v.size(); }
	int  subgroups(int a) { if (a>=0 && a<count()) return v[a].children.size(); return 0; }
	void updatefirstlast(int n,int f,int l);
	int  getartcount(int n);
	
	string getgroupname(int a) { if (a>=0 && a<count()) return v[a].name; return 0; }
	string getsubgroupname(int a, int q);
	string fname;
	map<string,int> m;
	vector<grouplistitem> v;
private:
};

implementation

string grouplist::getsubgroupname(int a, int q)
{
	if (a<0 || a>=count()) return ".err";
	if (q<0 || q>=(int) v[a].children.size()) return ".err";
	int child=v[a].children[q];
	string s=v[child].name;
	int pnlen=v[a].name.length();
	if (pnlen!=0) pnlen++;
	if ((int) s.length()<pnlen+1) return ".db.err";
	//printf("GNAME:%d %d %d\n",a,child,pnlen);
	return s.substr(pnlen,9999);
}

void grouplist::loadfromfile(string vfname)
{
	fname=vfname;
	gzFile fin=gzopen(fname.c_str(),"r");
	if (fin)
	{
		int crt=1;
		while (1)
		{
			char gn[1000];
			char buf[1000];
			int parent,af,al;
			gzgets(fin,buf,999);
			if (4!=sscanf(buf,"%d %d %d %999s",&parent,&af,&al,gn)) break;
			v.push_back(grouplistitem(parent,gn));
			v[parent].children.push_back(crt++);
			m[gn]=crt-1;
			v[crt-1].artfirst=af;
			v[crt-1].artlast=al;
		}
		printf("Loaded from file %d groups\n",crt-1);
		gzclose(fin);
	}
}

void grouplist::savetofile(string vfname)
{
	gzFile fou=gzopen(vfname.c_str(),"w");
	int i;
	if (fou)
	{
		for (i=1; i<(int) v.size(); i++)
		{
			gzprintf(fou,"%d %d %d %s\n",v[i].parent,v[i].artfirst,v[i].artlast,v[i].name.c_str());
		}
		gzclose(fou);
		printf("Group List saved to file\n");
	}
}

void grouplist::updatefirstlast(int n,int f,int l)
{
	if (n<0 || n>=count()) return;
	v[n].artfirst=f;
	v[n].artlast=l;
}

int grouplist::getartcount(int n)
{
	int l;
	if (n<0 || n>>count()) return 0;
	l=v[n].artlast-v[n].artfirst;
	if (l<0) l=0;
	return l;
}	

grouplist::grouplist()
{
	v.push_back(grouplistitem(0,""));
	m[""]=0;
}

grouplist::~grouplist()
{
	if (fname!="") savetofile(fname);
}

int grouplist::find(string name, int where, int addifneeded, string sep)
{
	string cname=name;
	string pname="";
	int pnamesplit;
	map<string,int>::iterator it;
	int iparent;
	int crt;

	if (where!=0) cname=v[where].name+sep+name;
	if (sep!=".")
	{
		int i;
		for (i=0; i<(int) cname.length(); i++)
			if (cname[i]==sep[0]) cname[i]='.';
	}
	it=m.find(cname);
	if (it!=m.end()) return it->second;
	if (!addifneeded) return -1;

	pnamesplit=cname.rfind(sep);
	if (pnamesplit>0) pname=cname.substr(0,pnamesplit);

	iparent=find(pname,0,addifneeded,".");
	crt=v.size();
	v.push_back(grouplistitem(iparent,cname));
	v[iparent].children.push_back(crt);
	m[cname]=crt;
	return crt;
}