libgfaservices/rest/restvar.h

// restvar.h :
//

#if !defined(AGD_RESTVAR_H__77EB9782_2B70_4713_A649_F4695F617197__INCLUDED_)
#define AGD_RESTVAR_H__77EB9782_2B70_4713_A649_F4695F617197__INCLUDED_

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <string>
#include <pthread.h>
#include <typeinfo>
#include <vector>
#include <map>
#include <gfa/gfaipc.h>
#ifndef _LIBBUILD
#include <gfa/svc/rest/defines.h>
#include <gfa/svc/common/debug.h>
#else	//	_LIBBUILD
#include "defines.h"
#include "common/debug.h"
#endif	//	_LIBBUILD

extern "C"
{
#include <ulfius.h>
}

/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
// class CJson_t

class CJson_t
{
public:
	CJson_t(json_t *pjt, bool bFree = true) : m_pjt(pjt), m_bFree(bFree)
	{
	}

	~CJson_t(void)
	{
		if(m_pjt && m_bFree)
			json_decref(m_pjt);
	}

	CJson_t& operator = (json_t *pjt)
	{
		m_pjt = pjt;
		return *this;
	}

	operator json_t*(void) {
		return m_pjt;}

	operator const json_t*(void) const {
		return m_pjt;}

	bool IsValid(void) const {
		return !!m_pjt;}

	bool IsArray(void) {
		return json_is_array(m_pjt);}

	bool IsObject(void) {
		return json_is_object(m_pjt);}

	int Type(void) const {
		return IsValid() ? json_typeof(m_pjt) : -1;}

private:
	json_t *m_pjt;
	bool m_bFree;
};

/////////////////////////////////////////////////////////////////////////////

class CRestVarTable;

class CRest
{
public:
	virtual void CreateMembersTable(CRestVarTable &vt)								= 0;
	virtual void InitPath(CRest *pParent, const char *pszMemberName, int nIndex)	= 0;
	virtual const char* GetPath(void) const											= 0;
	virtual void GetValue(int nReqIndex, json_t* pjtMap)							= 0;
	virtual json_t* GetValue(int nReqIndex)											= 0;
	virtual json_t* SetValue(int nReqIndex, json_t* pjtVal)
	{
		UNUSED(pjtVal);
		return CreateStatusObject(nReqIndex, -1, "Cannot assign a value to an object!", GetPath());
	}

	static json_t* CreateStatusObject(int nReqIndex, int nStatusCode, const char *pszStatusMsg = nullptr, const char *pszPath = nullptr)
	{
		if(!pszStatusMsg)
			pszStatusMsg = "";
		CJson_t jtStatus(json_object(), false);
		CJson_t jtResponseType(json_integer(1));
		CJson_t jtReqIndex(json_integer(nReqIndex));
		CJson_t jtCode(json_integer(nStatusCode));
		CJson_t jtMsg(json_string(pszStatusMsg));
		json_object_set(jtStatus, "responseType", jtResponseType);
		json_object_set(jtStatus, "requestIndex", jtReqIndex);
		json_object_set(jtStatus, "code", jtCode);
		json_object_set(jtStatus, "message", jtMsg);
		if(pszPath && *pszPath)
		{
			CJson_t jtPath(json_string(pszPath));
			json_object_set(jtStatus, "path", jtPath);
		}
		return jtStatus;
	}

	static json_t* CreateValueObject(int nReqIndex, const char *pszPath, int nIndex, int nValType, const char *pszValName, json_t *pjtVal)
	{
		CJson_t jtValue(json_object(), false);
		CJson_t jtResponseType(json_integer(0));
		CJson_t jtReqIndex(json_integer(nReqIndex));
		CJson_t jtPath(json_string(pszPath));
		CJson_t jtIndex(json_integer(nIndex));
		CJson_t jtType(json_integer(nValType));
		CJson_t jtName(json_string(pszValName));
		json_object_set(jtValue, "responseType", jtResponseType);
		json_object_set(jtValue, "requestIndex", jtReqIndex);
		json_object_set(jtValue, "path", jtPath);
		json_object_set(jtValue, "index", jtIndex);
		json_object_set(jtValue, "valType", jtType);
		json_object_set(jtValue, "valName", jtName);
		json_object_set(jtValue, "value", pjtVal);
		return jtValue;
	}

	static void CreatePath(CRest *pParent, const char *pszMemberName, int nIndex, std::string &rPath)
	{
		char szIndex[32] = {0};

		if(!pszMemberName || !*pszMemberName)
			pszMemberName = "/";

		if(nIndex >= 0)
		{
			sprintf(szIndex, "[%d]", nIndex);
		}

		if(pParent)
		{
			rPath = pParent->GetPath();
			auto len = rPath.size();

			if(len > 0)
			{
				auto rend = rPath.rbegin();
				if(*rend != '/')
					rPath += "/";
			}

			rPath += pszMemberName;
			rPath += szIndex;
		}
		else
		{
			rPath = pszMemberName;
			rPath += szIndex;
		}

//		printf("%s\n", rPath.c_str());
	}
};

/////////////////////////////////////////////////////////////////////////////

class CRestVarTable
{
public:
	typedef bool (*_PFNCMP)(const std::string&, const std::string&);

public:
	CRestVarTable(void) : m_map(fncomp) {
	};

	virtual ~CRestVarTable(void) {
	};

	void AddVar(CRest *pVar) {
		if(pVar)
			m_map[std::string(pVar->GetPath())] = pVar;
	}

	CRest* Find(const char *key) const {
		std::map<std::string, CRest*>::const_iterator it = m_map.find(std::string(key));
		if(it == m_map.end())
			return nullptr;
		return it->second;
	}

	size_t size(void)
	{
		return m_map.size();
	}

private:
	static bool fncomp(const std::string &p1, const std::string &p2) {
		return p1.compare(p2) < 0;
	}

private:
	std::map<std::string, CRest*, _PFNCMP> m_map;
};

/////////////////////////////////////////////////////////////////////////////

class CRestVariable : public CRest
{
public:
	enum VT
	{
		VT_Invalid,
		VT_bool,
		VT_I1,
		VT_UI1,
		VT_I2,
		VT_UI2,
		VT_I4,
		VT_UI4,
		VT_I8,
		VT_UI8,
		VT_float,
		VT_double,
		VT_string
	};

	typedef union
	{
		void *pVoid;
		bool *pBool;
		signed char *pI1;
		unsigned char *pUI1;
		signed short *pI2;
		unsigned short *pUI2;
		signed int *pI4;
		unsigned int *pUI4;
		signed long long *pI8;
		unsigned long long *pUI8;
		float *pFloat;
		double *pDouble;
	}V_Ptr;

	typedef union
	{
		bool boolVal;
		signed char I1Val;
		unsigned char UI1Val;
		signed short I2Val;
		unsigned short UI2Val;
		signed int I4Val;
		unsigned int UI4Val;
		signed long long I8Val;
		unsigned long long UI8Val;
		float FloatVal;
		double DoubleVal;
	}V_Val;

public:
	CRestVariable(void *pData, const std::type_info &rti, HSHM hShm, const char *pszName, int nIndex, CRest *pParent);
	virtual ~CRestVariable(void);

	virtual void CreateMembersTable(CRestVarTable &vt);
	virtual void InitPath(CRest*pParent, const char *pszMemberName, int nIndex = -1);
	virtual const char* GetPath(void) const {
		return m_pszPath;
	}
	virtual void GetValue(int nReqIndex, json_t* pjtMap);
	virtual json_t* GetValue(int nReqIndex);
	virtual json_t* SetValue(int nReqIndex, json_t* pjtVal);

private:
    void Lock(void);
    void Unlock(void);

private:
    std::string m_name;
    std::string m_path;
    const char *m_pszPath;
    int m_nIndex;
    enum VT m_vt;
    volatile V_Ptr m_data;
    HSHM m_hShm;
    CRest *m_pParent;
    size_t m_nCbVarpath;
};

/////////////////////////////////////////////////////////////////////////////

class CRestStringVariable : public CRest
{
public:
	typedef enum
	{
		VT_Invalid,	// 0
		VT_Latin1,	// 1
		VT_UTF_8,	// 2
		VT_UTF_16,	// 3
		VT_UTF_32,	// 4
		VT_Unicode,	// 5
		VT_Last
	}VT;

	typedef union
	{
		void *pVoid;
		char *pszMbs;
		char16_t *pszWc16;
		char32_t *pszWc32;
		wchar_t *pszWcs;
	}V_Ptr;

public:
	CRestStringVariable(void *pData, size_t nCChData, VT vt, const std::type_info &rti, HSHM hShm, const char *pszName, int nIndex, CRest *pParent);
	virtual ~CRestStringVariable(void);

	virtual void CreateMembersTable(CRestVarTable &vt);
	virtual void InitPath(CRest*pParent, const char *pszMemberName, int nIndex = -1);
	virtual const char* GetPath(void) const {
		return m_pszPath;
	}
	virtual void GetValue(int nReqIndex, json_t* pjtMap);
	virtual json_t* GetValue(int nReqIndex);
	virtual json_t* SetValue(int nReqIndex, json_t* pjtVal);

private:
    void Lock(void);
    void Unlock(void);
    void zeroTerm(volatile V_Ptr &rp, size_t at);

private:
    std::string m_name;
    std::string m_path;
    const char *m_pszPath;
    int m_nIndex;
    VT m_vt;
    volatile V_Ptr m_data;
    size_t m_nCbBuffer;
    char *m_pszUTF8;
    size_t m_nCbUTF8;
    HSHM m_hShm;
    CRest *m_pParent;
    size_t m_nCbVarpath;
};

/////////////////////////////////////////////////////////////////////////////

class CRestBitVariable : public CRest
{
public:
	enum VT
	{
		VT_Invalid,
		VT_bool,
		VT_I1,
		VT_UI1,
		VT_I2,
		VT_UI2,
		VT_I4,
		VT_UI4,
		VT_I8,
		VT_UI8,
		VT_float,
		VT_double,
		VT_string
	};

	typedef union
	{
		void *pVoid;
		bool *pBool;
		signed char *pI1;
		unsigned char *pUI1;
		signed short *pI2;
		unsigned short *pUI2;
		signed int *pI4;
		unsigned int *pUI4;
		signed long long *pI8;
		unsigned long long *pUI8;
		float *pFloat;
		double *pDouble;
	}V_Ptr;

	typedef union
	{
		bool boolVal;
		signed char I1Val;
		unsigned char UI1Val;
		signed short I2Val;
		unsigned short UI2Val;
		signed int I4Val;
		unsigned int UI4Val;
		signed long long I8Val;
		unsigned long long UI8Val;
		float FloatVal;
		double DoubleVal;
	}V_Val;

public:
	CRestBitVariable(void *pData, size_t nOffset, int nBitNr, HSHM hShm, const char *pszName, CRest *pParent);
	virtual ~CRestBitVariable(void);

	virtual void CreateMembersTable(CRestVarTable &vt);
	virtual void InitPath(CRest*pParent, const char *pszMemberName, int nIndex = -1);
	virtual const char* GetPath(void) const {
		return m_pszPath;
	}
	virtual void GetValue(int nReqIndex, json_t* pjtMap);
	virtual json_t* GetValue(int nReqIndex);
	virtual json_t* SetValue(int nReqIndex, json_t* pjtVal);

private:
    void Lock(void);
    void Unlock(void);

private:
    std::string m_name;
    std::string m_path;
	uint8_t *m_pShmByte;
	uint8_t m_mask;
    const char *m_pszPath;
    HSHM m_hShm;
    CRest *m_pParent;
    size_t m_nCbVarpath;
};

/////////////////////////////////////////////////////////////////////////////

template <typename T, typename V>
class CRestArray :	public CRest,
					public std::vector<T*>
{
public:
	CRestArray(void *pData, const std::type_info &rti, HSHM hShm, const char *pszName, size_t nElemCount, CRest *pParent) : m_name(pszName) {
		UNUSED(pParent);
		for(size_t i = 0; i < nElemCount; i++)
		{
			this->push_back(new T(&((V*)pData)[i], rti, hShm, pszName, i, static_cast<CRest*>(this)));
		}
	}

	CRestArray(void *pData, size_t nCChData, CRestStringVariable::VT vt, const std::type_info &rti, HSHM hShm, const char *pszName, size_t nElemCount, CRest *pParent) : m_name(pszName) {
		UNUSED(pParent);
		for(size_t i = 0; i < nElemCount; i++)
		{
			this->push_back(new T(((V*)pData) + nCChData * i, nCChData, vt, rti, hShm, pszName, i, static_cast<CRest*>(this)));
		}
	}

	CRestArray(void *pData, HSHM hShm, const char *pszName, size_t nElemCount, CRest *pParent) : m_name(pszName) {
		UNUSED(pParent);
		for(size_t i = 0; i < nElemCount; i++)
		{
			this->push_back(new T(&((V*)pData)[i], hShm, i, static_cast<CRest*>(this)));
		}
	}

	virtual ~CRestArray(void) {
		for(CRest *p : *this)
	    {
	    	if(p)
		        delete p;
		}
	}


public:
	virtual void CreateMembersTable(CRestVarTable &vt) {
		vt.AddVar(static_cast<CRest*>(this));

		for(CRest *p : *this) {
	    	if(p)
	    		p->CreateMembersTable(vt);
	    }
	}

	virtual void InitPath(CRest *pParent, const char *pszMemberName, int nIndex = -1) {
		int i = 0;
		CRest::CreatePath(pParent, pszMemberName, nIndex, m_path);
		m_pszPath = m_path.c_str();
		m_nCbVarpath = m_path.length();

		for(CRest *p : *this) {
	    	if(p)
	    		p->InitPath(pParent, pszMemberName, i++);
		}
	}

	virtual const char* GetPath(void) const {
		return m_pszPath;
	}

	virtual void GetValue(int nReqIndex, json_t* pjtMap) {
		for(CRest *p : *this) {
	    	if(p)
	    		p->GetValue(nReqIndex, pjtMap);
	    }
	}

	virtual json_t* GetValue(int nReqIndex) {
		CJson_t jtArr(json_array());

		for(CRest *p : *this) {
	    	if(p)
		    	json_array_append_new(jtArr, p->GetValue(nReqIndex));
	    }

		CJson_t jtObj(json_object(), false);
		CJson_t jtPath(json_string(m_pszPath));
		CJson_t jtIndex(json_integer(-1));
		CJson_t jtType(json_integer(jtArr.Type()));
		CJson_t jtName(json_string(m_name.c_str()));
		json_object_set(jtObj, "path", jtPath);
		json_object_set(jtObj, "index", jtIndex);
		json_object_set(jtObj, "valType", jtType);
		json_object_set(jtObj, "valName", jtName);
		json_object_set(jtObj, "value", jtArr);

		return jtObj;
	}

	virtual json_t* SetValue(int nReqIndex, json_t* pjtVal) {
		UNUSED(pjtVal);
		return CreateStatusObject(nReqIndex, -1, "Cannot assign a value to an array!", GetPath());
	}

private:
    std::string m_name;
    std::string m_path;
    const char *m_pszPath;
    size_t m_nCbVarpath;
};

/////////////////////////////////////////////////////////////////////////////
#endif	//	!defined(AGD_RESTVAR_H__77EB9782_2B70_4713_A649_F4695F617197__INCLUDED_)