postSlack.cpp

#include <algorithm>
#include <iomanip>
#include <sstream>
#include <string>
#include <vector>
#include <M5Stack.h>
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <NTPClient.h>
#include <WiFiUdp.h>
#include "encodeURIComponent.h"

const char* ssid = "";
const char* password = "";

const char* slackWebhookUrl = "https://hooks.slack.com/***";

unsigned long lastButtonPressTime = 0;

void setup() {
  M5.begin();
  Serial.begin(115200);

  M5.Lcd.fillScreen(0x000000);
  M5.Lcd.setTextSize(3);
  M5.Lcd.setTextColor(TFT_WHITE);

  // WiFi接続
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  configTime(9 * 3600, 0, "pool.ntp.org");
  while (!time(nullptr)) {
    Serial.println("Waiting for NTP time sync...");
    delay(1000);
  }
  lastButtonPressTime = millis();
}

void loop() {
  M5.update();

  // ボタンが押されたかどうかの判定
  if (M5.BtnA.wasPressed()) {
    Serial.println("BtnA");
    postMessage("排水ネット交換したよ!");

    displayMessage("Exchanged!", 2000);

    lastButtonPressTime = millis();
  }

  if (millis() - lastButtonPressTime >= 7 * 24 * 60 * 60 * 1000UL) {
    postMessage("排水ネットを交換してから１週間立ったよ");
  }

  M5.Lcd.setTextSize(2);
  displayElapsedTime();
  M5.Lcd.setTextSize(3);
  displayTime();
  delay(1000);
}

void postMessage(const char* message) {
  std::ostringstream encoded, payload;
  encodeURIComponent(message, encoded);
  payload << R"(payload={"text": ")" << encoded.str() << R"("})";

  sendSlackMessage(payload.str());
}

void sendSlackMessage(const std::string& payload) {
  WiFiClientSecure client;
  client.setInsecure();
  if (client.connect("hooks.slack.com", 443)) {
    Serial.println("Connected to server!");

    // HTTP POSTリクエストの構築
    std::ostringstream request;
    request << "POST /services/T0298QA7G/B067UA3QRT9/IodWyfwbRlpYb9dHh5jxspsd HTTP/1.1\r\n"
            << "Host: hooks.slack.com\r\n"
            << "User-Agent: WiFiClientSecure\r\n"
            << "Content-Type: application/x-www-form-urlencoded\r\n"
            << "Content-Length: " << payload.length() << "\r\n\r\n"
            << payload;

    Serial.println("Sending Slack message:");
    Serial.println(request.str().c_str());

    // データの送信
    client.print(request.str().c_str());
    client.println();

    while (client.connected()) {
      String line = client.readStringUntil('\n');
      if (line == "\r") {
        Serial.println("headers received");
        break;
      }
    }
    while (client.available()) {
      char c = client.read();
      Serial.write(c);
    }
    // 接続を閉じる
    client.stop();
  } else {
    Serial.println("Connection failed!");
  }
}

void displayTime() {
  time_t now;
  struct tm timeinfo;
  char formattedDate[16];
  char formattedTime[16];

  time(&now);
  localtime_r(&now, &timeinfo);

  strftime(formattedDate, sizeof(formattedDate), "%Y/%m/%d", &timeinfo);
  strftime(formattedTime, sizeof(formattedTime), "%H:%M:%S", &timeinfo);

  int textWidth = M5.Lcd.textWidth(formattedDate);
  int textX = (M5.Lcd.width() - textWidth) / 2;
  int textY = M5.Lcd.height() / 2 - 30;

  M5.Lcd.fillRect(0, textY - 2, M5.Lcd.width(), 55, TFT_BLACK);
  M5.Lcd.setCursor(textX, textY);
  M5.Lcd.println(formattedDate);

  textWidth = M5.Lcd.textWidth(formattedTime);
  textX = (M5.Lcd.width() - textWidth) / 2;
  textY += 30;

  M5.Lcd.setCursor(textX, textY);
  M5.Lcd.println(formattedTime);
}

void displayElapsedTime() {
  // 中央下部に前回交換からの経過時間を２行で表示
  unsigned long elapsedTime = (millis() - lastButtonPressTime) / 1000;  // ミリ秒から秒に変換

  int days = elapsedTime / (24 * 60 * 60);
  int hours = (elapsedTime % (24 * 60 * 60)) / 3600;
  int minutes = (elapsedTime % 3600) / 60;
  int seconds = elapsedTime % 60;

  char elapsedMessage[64];
  char elapsedHours[32];

  sprintf(elapsedMessage, "%d days %02d:%02d:%02d", days, hours, minutes, seconds);
  sprintf(elapsedHours, "since last maintenance.");

  int textWidth = M5.Lcd.textWidth(elapsedMessage);
  int textX = (M5.Lcd.width() - textWidth) / 2;
  int textY = M5.Lcd.height() / 2 + 35;
  
  M5.Lcd.fillRect(textX, textY, textWidth, M5.Lcd.fontHeight(), TFT_BLACK);
  M5.Lcd.setCursor(textX, textY);
  M5.Lcd.println(elapsedMessage);

  textWidth = M5.Lcd.textWidth(elapsedHours);
  textX = (M5.Lcd.width() - textWidth) / 2;
  textY += 10;
  
  M5.Lcd.setCursor(textX, textY);
  M5.Lcd.println(elapsedHours);
}


void displayMessage(const char* message, int duration) {
  // 画面の中央に表示
  int textWidth = M5.Lcd.textWidth(message);
  int textX = (M5.Lcd.width() - textWidth) / 2;
  int textY = M5.Lcd.height() / 2 - 10;

  M5.Lcd.fillScreen(TFT_BLACK);
  M5.Lcd.setCursor(textX, textY);
  M5.Lcd.println(message);
  delay(duration);
}