Modelbahn/server/block.cc

#include "modelbahn.h"
#include "block.h"


Blocks::Blocks () {
	changed = 0;
	blocks = (Block*) malloc(sizeof(Block)*SENSORS_MAX);
	max = BLOCKS_MAX;
};

Blocks::~Blocks() {
	free (blocks);
	blocks = NULL;
	max = 0;
};




int Blocks::Lock() {
	if (pthread_mutex_lock(&mtx) == 0) return 1;
	else return 0;
}


int Blocks::UnLock() {
	if (pthread_mutex_unlock(&mtx) == 0) return 1;
	else return 0;
}


JSONParse Blocks::_GetJSON(int idx) {
	JSONParse json;
	JSONElement je;
	string s = "";

	json.Clear();

	s = blocks[idx].name; json.AddObject("name", s);
	json.AddObject("flags", blocks[idx].flags);

	return json;
};


JSONParse Blocks::GetJSON(string name) {
	int i;
	JSONParse jp;

	jp.Clear();

	Lock();
	for (i = 0; i < max; i++) if (blocks[i].name[0] != 0) {
		if (name.compare(blocks[i].name) == 0) {
			jp = _GetJSON(i);
		}
	}

	UnLock();

	return jp;
};


void Blocks::GetJSONAll(JSONParse *json) {
	int i, cnt;
	JSONElement je;

	Lock();

	//
	// write all railway data
	// create json object array manualy
	je.type = JSON_T_ARRAY;
	je.name = "blocks";
	for (cnt = 0, i = 0; i < max; i++)
		if (blocks[i].name[0] != 0) {
			if (cnt != 0) je.value += ",";			// not first element
			je.value += _GetJSON(i).ToString();
			cnt++;
		}
	json->AddObject(je);

	UnLock();
};


Block Blocks::GetBlockFromJSON(JSONParse *j) {
	Block bl;
	string s;

	bl.name[0] = 0;
	bl.flags = 0;

	j->GetValue("name", &s);
	strncpy (bl.name, s.c_str(), REFERENCENAME_LEN);
	j->GetValueInt("flags", &bl.flags);

	return bl;
};


int Blocks::Change(Block *bl) {
	int i;
	int ifree = -1;

	Lock();

	for (i = 0; i < max; i++) {
		if (blocks[i].name[0] != 0) {
			// found element
			if (strncmp(blocks[i].name, bl->name, REFERENCENAME_LEN) == 0) {
				ifree = i;
				break;
			}
		}
		else if (ifree == -1) ifree = i;
	}
	// element not found add new element
	if (ifree != -1 && ifree < max) {
		blocks[ifree] = *bl;
		strncpy (blocks[ifree].name, bl->name, REFERENCENAME_LEN);
	}

	changed = 1;
	UnLock();

	return 1;
};


int Blocks::Delete(string name) {
	int i;

	Lock();
	for (i = 0; i < max; i++) if (blocks[i].name[0] != 0) {
		if (name.compare(blocks[i].name) == 0) {
			blocks[i].name[0] = 0;
			blocks[i].flags = 0;
			changed = 1;
			break;
		}
	}

	UnLock();

	return 1;
};