DrinksRfidTerminal/HttpSyncTransaction.cpp at master · drinks-wallet/DrinksRfidTerminal · GitHub

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/*
* "Drinks" RFID Terminal
* Buy sodas with your company badge!
*
* Benoit Blanchon 2014 - MIT License
* https://github.com/bblanchon/DrinksRfidTerminal
*/

#include <Arduino.h>
#include <ArduinoJson.h>

#include "Configuration.h"
#include "HashBuilder.h"
#include "HttpSyncTransaction.h"

bool HttpSyncTransaction::send()
{
    buffer[0] = 0;

    return http.query("GET " API_PATH "/sync", buffer, sizeof(buffer));
}

bool HttpSyncTransaction::parse()
{
    StaticJsonBuffer<JSON_OBJECT_SIZE(4)+JSON_ARRAY_SIZE(Catalog::MAX_PRODUCT_COUNT)> jsonBuffer;

    JsonObject& root = jsonBuffer.parseObject(buffer);
    if (!root.success()) return false;

    header = root["Header"];
    if (header == NULL) return false;

    JsonArray& productsArray = root["Products"];
    if (!productsArray.success()) return false;

    int count = productsArray.size();
    for (int i = 0; i < count; i++)
    {
        products[i] = productsArray[i];
    }
    products[count] = NULL;

    time = root["Time"];
    if (time == NULL) return false;

    hash = root["Hash"];
    if (hash == NULL) return false;

    return true;
}

bool HttpSyncTransaction::validate()
{
    HashBuilder hashBuilder;

    hashBuilder.print(header);

    for (int i = 0; products[i] != NULL; i++)
        hashBuilder.print(products[i]);

    hashBuilder.print(time);

    return strcasecmp(hash, hashBuilder.getHash()) == 0;
}

void HttpSyncTransaction::getCatalog(Catalog& catalog)
{
    catalog.setHeader(header);

    int i;
    for (i = 0; i < 4; i++)
    {
        if (products[i] == NULL) break;
        catalog.setProduct(i, products[i]);
    }

    catalog.setProductCount(i);
}