LedDisplay/vscode/OmobiLEDdisplayBluetooth/src/OmobiLedDisplay.cpp

#include "OmobiLedDisplay.h"
#include "esp_gatts_api.h"

OmobiLedDisplay::OmobiLedDisplay(String deviceName, Adafruit_NeoMatrix *ledDisplayMatrix)
{
    this->lastKeepAlive = -1;

    // init led display controller
    this->ledDisplayController = new LedDisplayController(ledDisplayMatrix);
    this->ledDisplayController->setTextSetParameter(0, LedDisplayController::ActiveParameter, "true");

    // init ble server
    this->bleServer = new BluetoothLeUartServer(deviceName, "92fecb20-1406-426a-afa5-cd5c1f306462", "92fecb21-1406-426a-afa5-cd5c1f306462", "92fecb22-1406-426a-afa5-cd5c1f306462");
    this->bleServer->setCallbacks(this);
}

void OmobiLedDisplay::loop() {
    if(millis() - lastKeepAlive > this->maximumKeepAliveDelay)
        this->bleServer->disconnectCurrentDevice();
}

void OmobiLedDisplay::onDeviceConnectedChanged(bool deviceConnected)
{
    if (deviceConnected) {
        Serial.println("Device connected");
        this->lastKeepAlive = millis();
    }
    else {
        Serial.println("Device disconnected");
        this->lastKeepAlive = -1;
    }
}

void OmobiLedDisplay::onDataReceived(String dataString)
{
    // process JSON
    const size_t capacity = JSON_OBJECT_SIZE(2) + JSON_OBJECT_SIZE(3) + 200;
    DynamicJsonDocument requestDoc(capacity);
    DeserializationError error = deserializeJson(requestDoc, dataString);

    // return on error
    if(error != DeserializationError::Ok)
        return;

    // get reuqest data
    OmobiDisplayCommand requestHeader = requestDoc["header"];
    JsonObject requestData = requestDoc["data"];

    // prepare reply data
    DynamicJsonDocument replyDoc(capacity);
    replyDoc["header"] = requestHeader;
    OmobiDisplayStatusCode replyStatus = InternalError;
    JsonObject replyData = replyDoc.createNestedObject("data");

    switch (requestHeader)
    {
    case KeepAliveCommand:
    {
        replyStatus = Success;
        this->lastKeepAlive = millis();
        break;
    }

    case GetAllTextSetsCommand:
    {
        // cycle through all text sets
        for (int textSetIndex = 0; textSetIndex < LedDisplayController::maximumTextSets; textSetIndex++)
        {
            if (this->ledDisplayController->getTextSetParameter(textSetIndex, LedDisplayController::TextParameter) == "")
                continue;

            //Serial.println("Adding index " + String(textSetIndex) + " with text: " + this->ledDisplayController->getTextSetParameter(textSetIndex, LedDisplayController::TextParameter));

            // if a set isn't empty, go through all parameters
            for (int textSetParameter = 0; textSetParameter < LedDisplayController::DisplayTextSetParameterCount; textSetParameter++)
            {
                // send each parameter to the client
                const size_t capacity = JSON_OBJECT_SIZE(2) + JSON_OBJECT_SIZE(3) + 200;
                DynamicJsonDocument doc(capacity);

                doc["header"] = GetTextSetParameterCommand;

                JsonObject data = doc.createNestedObject("data");
                data["index"] = textSetIndex;
                data["parameter"] = textSetParameter;
                data["value"] = this->ledDisplayController->getTextSetParameter(
                    textSetIndex,
                    LedDisplayController::DisplayTextSetParameter(textSetParameter));

                String json;
                serializeJson(doc, json);
                this->bleServer->sendData(json);
            }
        }

        replyStatus = Success;
        replyData["maximumTextSets"] = LedDisplayController::maximumTextSets;
        replyData["maximumTextLength"] = LedDisplayController::maximumTextLength;

        break;
    }
    case GetDisplayBrightnessCommand:
    {
        replyData["displayBrightness"] = this->ledDisplayController->getBrightness();
        replyStatus = Success;
        break;
    }

    case SetTextSetParameterCommand:
    {
        int index = requestData["index"];
        int parameter = requestData["parameter"];
        String value = requestData["value"];

        LedDisplayController::GetSetTextSetParameterExitCode res = this->ledDisplayController->setTextSetParameter(index, LedDisplayController::DisplayTextSetParameter(parameter), value);

        if (res == LedDisplayController::Success)
            replyStatus = Success;
        else
        {
            replyStatus = DisplayControllerError;
            replyData["displayControllerError"] = res;
        }

        break;
    }
    case SetDisplayBrightnessCommand:
    {
        this->ledDisplayController->setBrightness(requestData["displayBrightness"]);
        replyStatus = Success;
        break;
    }
    default:
        break;
    }

    // reply to the client
    replyDoc["status"] = replyStatus;
    String json;
    serializeJson(replyDoc, json);
    this->bleServer->sendData(json);
}