// help.cpp

#include	"stdafx.h"
#include	"smaug.h"
#include	"help.h"

// Adds a help page to the list if it is not a duplicate of an existing page.
// Page is insert-sorted by keyword.			-Thoric
// (The reason for sorting is to keep do_hlist looking nice)
void CHelpList::Add (CHelpData *pHelp)
{
	BOOL		bFound = FALSE;
	POSITION	CurPos, pos = GetTailPosition ();

	while (pos) {
		CurPos = pos;
		CHelpData	&Htest = *(CHelpData*) GetPrev (pos);
		if (Htest == *pHelp) {
			bug ("add_help: duplicate: %s.  Deleting.",
				NCCP pHelp->GetKey ());
			delete pHelp;
			return;
		}

		if (Htest < *pHelp) {
			InsertAfter (CurPos, pHelp);
			bFound = TRUE;
			break;
		}
	}

	if (! bFound)
		AddHead (pHelp);
}


BOOL CHelpData::operator== (CHelpData& in)
{
	return m_Level == in.GetLevel () && ! str_cmp (m_pKey, in.m_pKey);
}


BOOL CHelpData::operator> (CHelpData& in)
{
	char	*k1 = m_pKey;
	char	*k2 = in.m_pKey;

	while (*k1 == '\'' || *k1 == '\"')
		++k1;
	while (*k2 == '\'' || *k1 == '\"')
		++k2;
	
	int	rv = stricmp (k1, k2);
	if (rv > 0) then return TRUE;

	if (! rv && m_Level > in.GetLevel ()) then return TRUE;

	return FALSE;
}


BOOL CHelpData::operator< (CHelpData& in)
{
	char	*k1 = m_pKey;
	char	*k2 = in.m_pKey;

	while (*k1 == '\'' || *k1 == '\"')
		++k1;
	while (*k2 == '\'' || *k1 == '\"')
		++k2;
	
	int	rv = stricmp (k1, k2);
	if (rv < 0) then return TRUE;

	if (! rv && m_Level < in.GetLevel ()) then return TRUE;

	return FALSE;
}


// Load a help section.
void LoadAllHelp (FILE *fp)
{
	CHelpData	*pHelp;
	char		*pLine;

	for (;;) {
		pLine = fread_line (fp);
		pHelp = new CHelpData;
		pHelp->SetLevel (ParseNumber (pLine));
		pHelp->SetKey (ParseString (pLine, fp));
		if (pHelp->IsLastKey ()) {
			delete pHelp;
			break;
		}

		pLine = fread_line (fp);
		pHelp->SetText (ParseString (pLine, fp));
		if (pHelp->IsEmpty ()) {
			delete pHelp;
			continue;
		}

		HelpList.Add (pHelp);
	}
}


CHelpData::~CHelpData ()
{
	STRFREE (m_pText);
	STRFREE (m_pKey);
}


CHelpData *CHelpList::Find (const char* key, int level, int TrustLevel)
{
	BOOL		bFound = FALSE;
	CHelpData	*pHelp;
	POSITION	pos = GetHeadPosition ();

	while (pos) {
		pHelp = (CHelpData*) GetNext (pos);
		if (str_cmp (pHelp->m_pKey, key) < 0) then break;		// not found

		if (is_name (key, pHelp->m_pKey)) {
			// if found but player TrustLevel too low...
			if (pHelp->GetLevel () > TrustLevel) then break;
			if (level == -2 || pHelp->GetLevel () == level) {
				bFound = TRUE;
				break;
			}
		}
	}
	return bFound ? pHelp : NULL;
}


void CHelpList::Remove (CHelpData* pHelp)
{
	if (pHelp) {
		POSITION	pos = CPtrList::Find (pHelp);
		RemoveAt (pos);
		delete pHelp;
	}
}


void CHelpList::RemoveAll ()
{
	while (! IsEmpty ())
		delete (CHelpData*) RemoveTail ();

	CPtrList::RemoveAll ();
}