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database-config-json.cpp
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database-config-json.cpp
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#include <sstream>
#include "database-config-json.h"
#ifdef __clang__
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wexpansion-to-defined"
#endif
#include "rapidjson/document.h"
#include "rapidjson/prettywriter.h"
#include "rapidjson/stringbuffer.h"
#ifdef __clang__
#pragma clang diagnostic pop
#endif
#include "errlist.h"
#include "utilstring.h"
// Copy declaration from pkt2.proto
enum SQL_DIALECT : int {
SQL_POSTGRESQL = 0,
SQL_MYSQL = 1,
SQL_FIREBIRD = 2,
SQL_SQLITE = 3
};
ConfigDatabasesJson::ConfigDatabasesJson(const std::string &filename)
{
std::string v = file2string(filename.c_str());
load(v);
}
static const char *JSON_FLD_NAME[10] = {
"id", "name", "type", "active", "connection",
"login", "password", "table_aliases", "field_aliases", "properties"
};
/**
* Each database entry looks like shown below:
* "id": 3,
* "name": "postgres",
* "type": "postgresql",
* "active": false,
* "connection": "postgresql://irthermometer...",
* "login"
* "password"
* "table_aliases": [ ["iridium.IEPacket", "iridium_packet"],...
* "field_aliases": [ ["iridium.IEPacket", "iridium_packet"],...
* "properties": [ ["addr", "loraaddr"],
* @param value JSON value
* @return 0- success
*/
int ConfigDatabasesJson::load(
const std::string &value
) {
int r = 0;
rapidjson::Document doc;
doc.Parse<rapidjson::kParseCommentsFlag>(value.c_str());
if (!doc.IsArray())
return ERR_CODE_INVALID_JSON;
for (rapidjson::SizeType i = 0; i < doc.Size(); i++) {
rapidjson::Value &db = doc[i];
if (!db.IsObject())
continue;
ConfigDatabase cdb;
cdb.id = 0;
cdb.active = true;
cdb.port = 0;
// id
if (db.HasMember(JSON_FLD_NAME[0])) {
rapidjson::Value &v = db[JSON_FLD_NAME[0]];
if (v.IsInt())
cdb.id = v.GetInt();
}
// "name"
if (db.HasMember(JSON_FLD_NAME[1])) {
rapidjson::Value &v = db[JSON_FLD_NAME[1]];
if (v.IsString())
cdb.name = v.GetString();
}
// "type"
if (db.HasMember(JSON_FLD_NAME[2])) {
rapidjson::Value &v = db[JSON_FLD_NAME[2]];
if (v.IsString())
cdb.type = v.GetString();
}
// "active"
if (db.HasMember(JSON_FLD_NAME[3])) {
rapidjson::Value &v = db[JSON_FLD_NAME[3]];
if (v.IsBool())
cdb.active = v.GetBool();
}
// "connection"
if (db.HasMember(JSON_FLD_NAME[4])) {
rapidjson::Value &v = db[JSON_FLD_NAME[4]];
if (v.IsString())
cdb.connectionString = v.GetString();
}
// "login"
if (db.HasMember(JSON_FLD_NAME[5])) {
rapidjson::Value &v = db[JSON_FLD_NAME[5]];
if (v.IsString())
cdb.login = v.GetString();
}
// "password"
if (db.HasMember(JSON_FLD_NAME[6])) {
rapidjson::Value &v = db[JSON_FLD_NAME[6]];
if (v.IsString())
cdb.password = v.GetString();
}
// "table_aliases"
if (db.HasMember(JSON_FLD_NAME[7])) {
rapidjson::Value &v = db[JSON_FLD_NAME[7]];
if (v.IsArray()) {
for (rapidjson::SizeType c = 0; c < v.Size(); c++) {
rapidjson::Value &e = v[c];
if (!e.IsArray())
continue;
if (e.Size() < 1)
continue;
rapidjson::Value &ek = e[0];
if (!ek.IsString())
continue;
std::string k = ek.GetString();
std::string kv;
if (e.Size() >= 2) {
rapidjson::Value &e2 = e[1];
if (ek.IsString())
kv = e2.GetString();
}
cdb.tableAliases[k] = kv;
}
}
}
// "field_aliases"
if (db.HasMember(JSON_FLD_NAME[8])) {
rapidjson::Value &v = db[JSON_FLD_NAME[8]];
if (v.IsArray()) {
for (rapidjson::SizeType c = 0; c < v.Size(); c++) {
rapidjson::Value &e = v[c];
if (!e.IsArray())
continue;
if (e.Size() < 1)
continue;
rapidjson::Value &ek = e[0];
if (!ek.IsString())
continue;
std::string k = ek.GetString();
std::string kv;
if (e.Size() >= 2) {
rapidjson::Value &e2 = e[1];
if (ek.IsString())
kv = e2.GetString();
}
cdb.fieldAliases[k] = kv;
}
}
}
// "properties"
if (db.HasMember(JSON_FLD_NAME[9])) {
rapidjson::Value &v = db[JSON_FLD_NAME[9]];
if (v.IsArray()) {
for (rapidjson::SizeType c = 0; c < v.Size(); c++) {
rapidjson::Value &e = v[c];
if (!e.IsArray())
continue;
if (e.Size() < 1)
continue;
rapidjson::Value &ek = e[0];
if (!ek.IsString())
continue;
std::string k = ek.GetString();
std::string kv;
if (e.Size() >= 2) {
rapidjson::Value &e2 = e[1];
if (ek.IsString())
kv = e2.GetString();
}
cdb.properties[k] = kv;
}
}
}
dbs.push_back(cdb);
}
return 0;
}
int ConfigDatabasesJson::getDialect(int index) const
{
const ConfigDatabase &db = dbs.at(index);
if (db.type == "postgresql")
return SQL_POSTGRESQL;
else
if (db.type == "mysql")
return SQL_MYSQL;
else
if (db.type == "firebird")
return SQL_FIREBIRD;
else
if (db.type == "sqlite3")
return SQL_SQLITE;
else
return SQL_SQLITE;
}
std::string ConfigDatabasesJson::toString() const
{
std::stringstream ss;
ss << "[";
bool isNext = false;
for (int i = 0; i < dbs.size(); i++) {
if (isNext) {
ss << ", ";
} else {
isNext = true;
}
ss << toString(i) << std::endl;
}
ss << "]";
return ss.str();
}
std::string ConfigDatabasesJson::toString(int index) const
{
const ConfigDatabase &db = dbs.at(index);
std::stringstream ss;
ss << "{"
<< "\"id\": " << db.id << ", "
<< "\"name\": \"" << db.name << "\", "
<< "\"type\": \"" << db.type << "\", "
<< "\"active\": " << (db.active ? "true" : "false" ) << ", "
<< "\"connection\": \"" << db.connectionString << "\", "
<< "\"login\": \"" << db.login << "\", "
<< "\"password\": \"" << db.password << "\", "
<< "\"db\": \"" << db.db << "\"";
if (db.tableAliases.size()) {
ss << ", \"table_aliases\": [";
bool isNext = false;
for (std::map<std::string, std::string>::const_iterator it(db.tableAliases.begin()); it != db.tableAliases.end(); it++) {
if (isNext) {
ss << ", ";
} else {
isNext = true;
}
ss << "[\"" << it->first << "\", \"" << it->second << "\"]";
}
ss << "]";
}
if (db.fieldAliases.size()) {
ss << ", \"field_aliases\": [";
bool isNext = false;
for (std::map<std::string, std::string>::const_iterator it(db.fieldAliases.begin()); it != db.fieldAliases.end(); it++) {
if (isNext) {
ss << ", ";
} else {
isNext = true;
}
ss << "[\"" << it->first << "\", \"" << it->second << "\"]";
}
ss << "]";
}
if (db.properties.size()) {
ss << ", \"properties\": [";
bool isNext = false;
for (std::map<std::string, std::string>::const_iterator it(db.properties.begin()); it != db.properties.end(); it++) {
if (isNext) {
ss << ", ";
} else {
isNext = true;
}
ss << "[\"" << it->first << "\", \"" << it->second << "\"]";
}
ss << "]";
}
ss << "}";
return ss.str();
}
const ConfigDatabase *ConfigDatabasesJson::findByName(const std::string &name) const
{
for (std::vector<ConfigDatabase>::const_iterator it(dbs.begin()); it != dbs.end(); it++ ) {
if (it->name == name) {
return &(*it);
}
}
return nullptr;
}
void ConfigDatabasesJson::setProperties(
std::map<std::string, std::string> &retval,
const std::map<std::string, std::string> &values,
int index
) const
{
const ConfigDatabase &db = dbs.at(index);
// copy only values listed in aliases, and replace key to the alias name
for (std::map<std::string, std::string>::const_iterator it(db.properties.begin()); it != db.properties.end(); it++) {
std::map<std::string, std::string>::const_iterator f = values.find(it->first);
if (f != values.end()) {
if (!it->second.empty()) {
retval[it->second] = f->second;
}
}
}
}