Feature/UI/countdown

controller/tea_poor/lib/Arduino/RemoteControl.cpp

@@ -38,16 +38,7 @@ void debugNetworkInfo() {
   Serial.println();
 }
 
-RemoteControl::RemoteControl(const char* SSID, const char* SSIDPassword) : 
-  _SSID(SSID), _SSIDPassword(SSIDPassword),
-  _server(80), _app()
-{
-}
-
-RemoteControl::~RemoteControl() {
-}
-
-void RemoteControl::_setupNetwork() {
+void verifyNetwork() {
   if (WiFi.status() == WL_NO_MODULE) {
     Serial.println("Communication with WiFi module failed!");
     while(true) delay(500);
@@ -59,15 +50,25 @@ void RemoteControl::_setupNetwork() {
     Serial.println(WIFI_FIRMWARE_LATEST_VERSION);
     Serial.println("Please upgrade your firmware.");
   }
+}
+
+RemoteControl::RemoteControl(const NetworkConnectCallback &onConnect) :
+  _onConnect(onConnect)
+{
+}
 
+RemoteControl::~RemoteControl() {
+}
+
+void RemoteControl::connectTo(const char* ssid, const char* password) {
   Serial.print("Connecting to ");
-  Serial.println(_SSID);
+  Serial.println(ssid);
 
   int attempts = 0;
   while (WL_CONNECTED != WiFi.status()) { // try to connect to the network
     attempts++;
-    Serial.println("Atempt to connect: " + String(attempts));
-    WiFi.begin(_SSID.c_str(), _SSIDPassword.c_str());
+    Serial.println("Attempt to connect: " + String(attempts));
+    WiFi.begin(ssid, password);
     for (int i = 0; i < 50; i++) { // wait for connection
       Serial.print(".");
       delay(500);
@@ -77,30 +78,33 @@ void RemoteControl::_setupNetwork() {
     Serial.println("Connection status: " + String(WiFi.status()));
   }
   Serial.println();
-
+  // successfully connected
   debugNetworkInfo();
 }
 
-void RemoteControl::setup(RemoteControlRoutesCallback routes) {
-  _setupNetwork();
-  routes(_app); // setup routes
+void RemoteControl::setup() { reconnect(); }
+
+void RemoteControl::reconnect() {
+  // reset everything
+  WiFi.disconnect();
+  verifyNetwork();
+  _app = Application(); // reset routes
+  _server = WiFiServer(80); // reset server
+  // reconnect
+  _onConnect(*this, _app);
   _server.begin();
 }
 
 void RemoteControl::process() {
-  // TODO: check if we still have a connection. If not, reconnect.
+  if(WL_CONNECTED != WiFi.status()) {
+    reconnect();
+    return; // wait for next tick, just to be sure that all is ok
+  }
+  ///////////////////////////
   WiFiClient client = _server.available();
 
   if (client.connected()) {
     _app.process(&client);
     client.stop();
   }
-}
-
-String RemoteControl::asJSONString() const {
-  String result = "{";
-  result += "\"SSID\": \"" + _SSID + "\",";
-  result += "\"signal strength\": " + String(WiFi.RSSI());
-  result += "}";
-  return result;
 }

controller/tea_poor/lib/Arduino/RemoteControl.h

@@ -4,20 +4,25 @@
 #include <Arduino.h>
 #include <WiFiS3.h>
 #include <aWOT.h>
+#include <functional>
 
-// define routes callback function signature
-typedef void (*RemoteControlRoutesCallback)(Application &app);
+// forward declaration
+class RemoteControl;
+
+// define callback for (re)connecting to WiFi, use std::function
+typedef std::function<void(RemoteControl&, Application&)> NetworkConnectCallback;
 
 class RemoteControl {
 public:
-  RemoteControl(const char* SSID, const char* SSIDPassword);
+  RemoteControl(const NetworkConnectCallback &onConnect);
   ~RemoteControl();
-  void setup(RemoteControlRoutesCallback routes);
+  void setup();
   void process();
-  String asJSONString() const;
+  void reconnect();
+  ///////////////////
+  void connectTo(const char* ssid, const char* password);
 private:
-  const String _SSID;
-  const String _SSIDPassword;
+  NetworkConnectCallback _onConnect;
   WiFiServer _server;
   Application _app;
 

controller/tea_poor/lib/Arduino/WaterPumpController.cpp

@@ -12,7 +12,9 @@ WaterPumpController::WaterPumpController(int directionPin, int brakePin, int pow
 WaterPumpController::~WaterPumpController() {}
 
 void WaterPumpController::setup() {
-  pinMode(_directionPin, OUTPUT);
+  // NOTE: we use one-directional motor, so we can't use direction pin
+  //       but I keep it here for future reference
+  // pinMode(_directionPin, OUTPUT);
   pinMode(_brakePin, OUTPUT);
   pinMode(_powerPin, OUTPUT);
   stop();

controller/tea_poor/lib/CommandProcessor/CommandProcessor.cpp

@@ -20,12 +20,14 @@ bool isValidIntNumber(const char *str, const int maxValue, const int minValue=0)
 
 std::string CommandProcessor::status() {
   std::stringstream response;
+  const auto now = _env->time();
   response << "{";
+  // send current time in milliseconds to synchronize time on client side
+  response << "\"time\": " << now << ", ";
   // send water threshold
   response << "\"water threshold\": " << _waterPumpSafeThreshold << ", ";
   // send water pump status
   const auto waterPumpStatus = _waterPump->status();
-  const auto now = _env->time();
   const auto timeLeft = waterPumpStatus.isRunning ? waterPumpStatus.stopTime - now : 0;
   response 
     << "\"pump\": {"
@@ -43,7 +45,7 @@ std::string CommandProcessor::status() {
 }
 
 std::string CommandProcessor::pour_tea(const char *milliseconds) {
-  if (!isValidIntNumber(milliseconds, _waterPumpSafeThreshold)) {
+  if (!isValidIntNumber(milliseconds, _waterPumpSafeThreshold + 1)) {
     // send error message as JSON
     return std::string("{ \"error\": \"invalid milliseconds value\" }");
   }

controller/tea_poor/src/main.cpp

@@ -18,9 +18,6 @@ auto waterPump = std::make_shared<WaterPumpScheduler>(
   )
 );
 
-// setting up remote control
-RemoteControl remoteControl(WIFI_SSID, WIFI_PASSWORD);
-
 // build command processor
 CommandProcessor commandProcessor(
   WATER_PUMP_SAFE_THRESHOLD,
@@ -35,10 +32,17 @@ void withExtraHeaders(Response &res) {
   res.set("Content-Type", "application/json");
 }
 
-void setup() {
-  Serial.begin(9600);
-  waterPump->setup();
-  remoteControl.setup([](Application &app) {
+RemoteControl remoteControl(
+  // lambda function to setup network
+  [](RemoteControl &remoteControl, Application &app) {
+    // connect to WiFi
+    // set static IP address, if defined in configs
+    #ifdef WIFI_IP_ADDRESS
+    WiFi.config(WIFI_IP_ADDRESS);
+    #endif
+
+    remoteControl.connectTo(WIFI_SSID, WIFI_PASSWORD);
+    // setup routes
     app.get("/pour_tea", [](Request &req, Response &res) {
       char milliseconds[64];
       req.query("milliseconds", milliseconds, 64);
@@ -59,7 +63,13 @@ void setup() {
       withExtraHeaders(res);
       res.print(response.c_str());
     });
-  });
+  }
+);
+
+void setup() {
+  Serial.begin(9600);
+  waterPump->setup();
+  remoteControl.setup();
 }
 
 void loop() {

controller/tea_poor/src/secrets.h.example

@@ -15,4 +15,7 @@ const int WATER_PUMP_POWER_PIN = 3;
 // Their is no reason to make it configurable and add unnecessary complexity
 const int WATER_PUMP_SAFE_THRESHOLD = 10 * 1000;
 
+// Static IP address. If not defined, dynamic IP address will be used
+// #define WIFI_IP_ADDRESS IPAddress(192, 168, 1, 123)
+
 #endif // SECRETS_H

controller/tea_poor/test/test_native/tests/CommandProcessor_test.h

@@ -3,21 +3,28 @@
 #include "mocks/FakeWaterPumpSchedulerAPI.h"
 #include "mocks/FakeEnvironment.h"
 
+const auto INVALID_TIME_ERROR_MESSAGE = "{ \"error\": \"invalid milliseconds value\" }";
 // test that pour_tea() method returns error message if milliseconds:
 // - greater than threshold
 // - less than 0
 // - empty string
 // - not a number
 TEST(CommandProcessor, pour_tea_invalid_milliseconds) {
-  const auto EXPECTED_ERROR_MESSAGE = "{ \"error\": \"invalid milliseconds value\" }";
   CommandProcessor commandProcessor(123, nullptr, nullptr);
+  ASSERT_EQ(commandProcessor.pour_tea("1234"), INVALID_TIME_ERROR_MESSAGE);
+  ASSERT_EQ(commandProcessor.pour_tea("-1"), INVALID_TIME_ERROR_MESSAGE);
+  ASSERT_EQ(commandProcessor.pour_tea(""), INVALID_TIME_ERROR_MESSAGE);
+  ASSERT_EQ(commandProcessor.pour_tea("abc"), INVALID_TIME_ERROR_MESSAGE);
+}
+
+// for simplicity of the UI, we should accept as valid 0 and exactly threshold value
+TEST(CommandProcessor, pour_tea_valid_boundary_values) {
+  auto env = std::make_shared<FakeEnvironment>();
+  auto waterPump = std::make_shared<FakeWaterPumpSchedulerAPI>();
+  CommandProcessor commandProcessor(123, env, waterPump);
 
-  // array of invalid parameters
-  const char *PARAMS[] = { "1234", "-1", "", "abc" };
-  for (auto param : PARAMS) {
-    const auto response = commandProcessor.pour_tea(param);
-    ASSERT_EQ(response, EXPECTED_ERROR_MESSAGE);
-  }
+  ASSERT_NE(commandProcessor.pour_tea("0"), INVALID_TIME_ERROR_MESSAGE);
+  ASSERT_NE(commandProcessor.pour_tea("123"), INVALID_TIME_ERROR_MESSAGE);
 }
 
 // test that start pouring tea by calling pour_tea() method and its stops after T milliseconds
@@ -46,6 +53,7 @@ TEST(CommandProcessor, status) {
   CommandProcessor commandProcessor(123, env, waterPump);
   const auto response = commandProcessor.status();
   ASSERT_EQ(response, "{"
+    "\"time\": 0, "
     "\"water threshold\": 123, "
     "\"pump\": {"
     "  \"running\": false, "
@@ -69,6 +77,7 @@ TEST(CommandProcessor, status_running) {
 
   const auto response = commandProcessor.status();
   ASSERT_EQ(response, "{"
+    "\"time\": 123, "
     "\"water threshold\": 12345, "
     "\"pump\": {"
     "  \"running\": true, "

ui/src/App.css

@@ -1,2 +1,15 @@
 .App {
+}
+
+.countdown-area {
+  width: 100%;
+  text-align: center;
+  font-weight: bold;
+  font-size: 2rem;
+}
+
+.hold-to-pour-image {
+  object-fit: contain;
+  width: 25%;
+  height: auto;
 }

ui/src/App.js

@@ -4,13 +4,14 @@ import { Container, Form } from 'react-bootstrap';
 import { connect } from 'react-redux';
 
 import NotificationsArea from './components/NotificationsArea.js';
-import APIAddressField from './components/APIAddressField';
-import PourTimeField from './components/PourTimeField';
-import SystemControls from './components/SystemControls';
-import SystemStatusArea from './components/SystemStatusArea';
+import APIAddressField from './components/APIAddressField.js';
+import PourTimeField from './components/PourTimeField.js';
+import SystemControls from './components/SystemControls.js';
+import SystemStatusArea from './components/SystemStatusArea.js';
+import CurrentOperationInfoArea from './components/CurrentOperationInfoArea.js';
+import HoldToPour from './components/HoldToPour.js';
 
 function App({ isConnected }) {
-  // TODO: Add a fake countdown timer of timeLeft
   return (
     <Container className="App">
       <h1>Tea System UI</h1>
@@ -21,7 +22,9 @@ function App({ isConnected }) {
         {isConnected ? (
           <>
             <PourTimeField />
+            <CurrentOperationInfoArea />
             <SystemControls />
+            <HoldToPour />
           </>
         ) : null}
       </Form>

ui/src/Utils/time.js

@@ -0,0 +1,22 @@
+function toTimeStr(diff) {
+  const seconds = Math.floor(diff / 1000);
+  const minutes = Math.floor(seconds / 60);
+  const hours = Math.floor(minutes / 60);
+
+  const secondsStr = (seconds % 60).toString().padStart(2, '0');
+  const minutesStr = (minutes % 60).toString().padStart(2, '0');
+  const hoursStr = hours.toString().padStart(2, '0');
+
+  return `${hoursStr}:${minutesStr}:${secondsStr}`;
+}
+
+export function timeBetweenAsString({endTime=null, startTime=null, bounded=false}) {
+  if (null === startTime) startTime = new Date();
+  if (null === endTime) endTime = new Date();
+
+  let diff = endTime - startTime; // in ms
+  if (bounded && (diff < 0)) diff = 0;
+
+  if (diff < 0) return '-' + toTimeStr(-diff);
+  return toTimeStr(diff);
+}