core-legacy/models/device_dbo.cc

//
// Created by tobias on 08/07/19.
//

#include <cstdio>
#include <cstring>
#include <string.h>
#include <trantor/utils/Logger.h>
#include "device_dbo.h"
#include "globals.h"

static bool device_db_update_insert(device_dbo *device, sqlite3_stmt *stmt)
{
    int rc;

    sqlite3_bind_text(stmt, 1, device->id, -1, SQLITE_STATIC);
    sqlite3_bind_text(stmt, 2, device->name, -1, SQLITE_STATIC);
    sqlite3_bind_text(stmt, 3, device->ip, -1, SQLITE_STATIC);
    sqlite3_bind_int(stmt, 4, device->active);
    sqlite3_bind_int(stmt, 5, device->port);
    sqlite3_bind_int(stmt, 6, device->relay_count);

    rc = sqlite3_step(stmt);
    if (rc != SQLITE_DONE)
    {
        printf("ERROR inserting data: %s\n", sqlite3_errmsg(globals::db));
        return false;
    }

    sqlite3_finalize(stmt);

    return true;
}

static device_dbo*
device_db_select_mapper(sqlite3_stmt *stmt)
{
    auto *new_device = (device_dbo*)malloc(sizeof(device_dbo));
    for(int i = 0; i < sqlite3_column_count(stmt); i++)
    {
        const char *name = sqlite3_column_name(stmt, i);
        switch(name[0])
        {
            case 'a': // active
                new_device->active = sqlite3_column_int(stmt, i);
                break;
            case 'i':
                switch(name[1])
                {
                    case 'd': // id
                        strncpy(new_device->id, (const char*)sqlite3_column_text(stmt, i), 32);
                        break;
                    case 'p': // ip
                        strncpy(new_device->ip, (const char*)sqlite3_column_text(stmt, i), 16);
                        break;
                }
                break;
            case 'n': // name
                strncpy(new_device->name, (const char*)sqlite3_column_text(stmt, i), 127);
                break;
            case 'p': // port
                new_device->port = sqlite3_column_int(stmt, i);
                break;
            case 'r': // relay_count
                new_device->relay_count = sqlite3_column_int(stmt, i);
                break;
        }
    }
    return new_device;
}

static device_dbo**
device_db_select(sqlite3_stmt *stmt)
{
    auto **all_devices = (device_dbo**)malloc(sizeof(device_dbo*));

    int row = 0;

    while(true)
    {
        int s;

        s = sqlite3_step(stmt);
        if (s == SQLITE_ROW)
        {
            device_dbo *new_device = device_db_select_mapper(stmt);
            row++;

            all_devices = (device_dbo**)realloc(all_devices, sizeof(device_dbo*) * (row + 1));
            all_devices[row - 1] = new_device;
        }
        else
        {
            if (s == SQLITE_DONE)
            {
                break;
            }
            else
            {
                LOG_ERROR << "Error Selecting devices from database";
                sqlite3_finalize(stmt);
                return nullptr;
            }
        }
    }

    sqlite3_finalize(stmt);
    all_devices[row] = nullptr;

    return all_devices;
}

bool
device_dbo::update()
{
    sqlite3_stmt *stmt;

    sqlite3_prepare_v2(globals::db, "UPDATE devices set name = ?2, ip = ?3, active = ?4, port = ?5, relay_count = ?6 WHERE id = ?1;", -1, &stmt, nullptr);

    return device_db_update_insert(this, stmt);
}

bool
device_dbo::insert()
{
    sqlite3_stmt *stmt;

    sqlite3_prepare_v2(globals::db, "INSERT INTO devices(id, name, ip, active, port, relay_count) values (?1, ?2, ?3, ?4, ?5, ?6);", -1, &stmt, nullptr);

    return device_db_update_insert(this, stmt);
}

bool
device_dbo::remove()
{
    sqlite3_stmt *stmt;
    int rc;

    sqlite3_prepare_v2(globals::db, "DELETE FROM devices WHERE id=?1;", -1, &stmt, nullptr);
    sqlite3_bind_text(stmt, 1, this->id, -1, SQLITE_STATIC);
    rc = sqlite3_step(stmt);
    sqlite3_finalize(stmt);

    return rc == SQLITE_DONE;

}

Json::Value
device_dbo::to_json()
{
    Json::Value device_json;
    device_json["name"] = this->name;
    device_json["id"] = this->id;
    device_json["ip"] = this->ip;
    device_json["port"] = this->port;
    device_json["relay_count"] = this->relay_count;
    device_json["active"] = this->active;

    return device_json;
}

device_dbo**
device_dbo::get_all()
{
    sqlite3_stmt *stmt;

    sqlite3_prepare_v2(globals::db, "SELECT * FROM devices;", -1, &stmt, nullptr);

    return device_db_select(stmt);
}

device_dbo*
device_dbo::get_one_by(const char *key, const char *value)
{
    sqlite3_stmt *stmt;
    char* sql;

    asprintf(&sql, "SELECT * FROM devices WHERE %s=?1;", key);

    sqlite3_prepare_v2(globals::db, sql, -1, &stmt, nullptr);
    sqlite3_bind_text(stmt, 1, value, -1, SQLITE_STATIC);

    return device_db_select(stmt)[0];
}

void
device_dbo::free_list(device_dbo **devices_list)
{
    for(int i = 0; devices_list[i] != nullptr; i++)
    {
        free(devices_list[i]);
    }
    free(devices_list);
}