Added world clock demo

WorldClockClient.cpp

@@ -0,0 +1,195 @@
+/**The MIT License (MIT)
+
+Copyright (c) 2015 by Daniel Eichhorn
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+See more at http://blog.squix.ch
+*/
+
+
+#include "WorldClockClient.h"
+
+
+WorldClockClient::WorldClockClient(String language, String country, String dateFormat, int numberOfTimeZones, String* timeZoneIds) {
+  myLanguage = language;
+  myCountry = country;
+  myDateFormat = dateFormat;
+  myNumberOfTimeZoneIds = numberOfTimeZones;
+  myTimeZoneIds = timeZoneIds;
+  timeZoneOffsetToUtcMillis = (long*) malloc(numberOfTimeZones * sizeof(long));
+}
+
+void WorldClockClient::updateTime() {
+  JsonStreamingParser parser;
+  parser.setListener(this);
+  WiFiClient client;
+
+  // http://api.thingspeak.com/channels/CHANNEL_ID/feeds.json?results=2&api_key=API_KEY
+  const char host[] = "oleddisplay.squix.ch";
+  String url = "/rest/time";
+
+  const int httpPort = 80;
+  if (!client.connect(host, httpPort)) {
+    Serial.println("connection failed");
+    return;
+  }
+
+
+  Serial.print("Requesting URL: ");
+  Serial.println(url);
+
+  // {"language":"de","country":"CH","timeZoneIds":["Europe/Zurich", "Europe/London"],"dateFormat":"dd.MM.YYYY"}
+  String timeZoneIdJson = "\"timeZoneIds\":[";
+  for (int i = 0; i < myNumberOfTimeZoneIds; i++) {
+    if (i > 0) {
+      timeZoneIdJson +=",";
+    }
+    timeZoneIdJson += "\"" + myTimeZoneIds[i] + "\"";
+  }
+  timeZoneIdJson += "]";
+  String request = "{\"language\":\""
+      + myLanguage + "\",\"country\":\""
+      + myCountry + "\","
+      + timeZoneIdJson +",\"dateFormat\":\""
+      + myDateFormat +"\"}\r\n\r\n";
+  Serial.println("Request: " + request);
+  // This will send the request to the server
+  client.print("POST " + url + " HTTP/1.1\r\n" +
+               "Host: " + host + "\r\n" +
+               "Content-Length: " + String(request.length()) + "\r\n" +
+               "Connection: close\r\n\r\n");
+
+  client.println(request);
+
+  while(!client.available()) {
+    Serial.println(".");
+    delay(1000);
+  }
+
+  int pos = 0;
+  boolean isBody = false;
+  char c;
+
+  int size = 0;
+  client.setNoDelay(false);
+  while(client.connected()) {
+    while((size = client.available()) > 0) {
+      c = client.read();
+      if (c == '{' || c == '[') {
+        isBody = true;
+      }
+      if (isBody) {
+        parser.parse(c);
+      }
+    }
+  }
+}
+
+
+String WorldClockClient::getFormattedTime(int timeZoneIndex) {
+  return getHours(timeZoneIndex) + ":" + getMinutes(timeZoneIndex) + ":" + getSeconds(timeZoneIndex);
+}
+
+String WorldClockClient::getHours(int timeZoneIndex) {
+  if (millisOfDayAtUpdate == 0) {
+    return "--";
+  }
+  int hours = ((getSecondsOfDay(timeZoneIndex)  % 86400L) / 3600) % 24;
+  if (hours < 10) {
+    return "0" + String(hours);
+  }
+  return String(hours); // print the hour (86400 equals secs per day)
+}
+
+String WorldClockClient::getMinutes(int timeZoneIndex) {
+  if (millisOfDayAtUpdate == 0) {
+    return "--";
+  }
+  int minutes = ((getSecondsOfDay(timeZoneIndex) % 3600) / 60);
+  if (minutes < 10 ) {
+    // In the first 10 minutes of each hour, we'll want a leading '0'
+    return "0" + String(minutes);
+  }
+  return String(minutes);
+}
+
+String WorldClockClient::getSeconds(int timeZoneIndex) {
+  if (millisOfDayAtUpdate == 0) {
+    return "--";
+  }
+  int seconds = getSecondsOfDay(timeZoneIndex) % 60;
+  if ( seconds < 10 ) {
+    // In the first 10 seconds of each minute, we'll want a leading '0'
+    return "0" + String(seconds);
+  }
+  return String(seconds);
+
+}
+
+long WorldClockClient::getSecondsOfDay(int timeZoneIndex) {
+  return (millisOfDayAtUpdate + millis() - localMillisAtUpdate + timeZoneOffsetToUtcMillis[timeZoneIndex]) / 1000;
+}
+
+void WorldClockClient::whitespace(char c) {
+
+}
+
+void WorldClockClient::startDocument() {
+
+}
+
+void WorldClockClient::key(String key) {
+  currentKey = key;
+}
+
+void WorldClockClient::value(String value) {
+  Serial.println(currentKey + ": " + value);
+  if (currentKey == "millisOfDayUtc") {
+    millisOfDayAtUpdate = value.toInt();
+    localMillisAtUpdate = millis();
+  } else if (currentKey == "index") {
+    currentTimeZoneIndex = value.toInt();
+    Serial.println("\n-->Current index: " + String(currentTimeZoneIndex));
+  } else if (currentKey == "timeZoneOffsetToUtcMillis") {
+    Serial.println("\n-->Index: " + String(currentTimeZoneIndex));
+    Serial.println("\n-->value: " + value);
+    timeZoneOffsetToUtcMillis[currentTimeZoneIndex] = value.toInt();
+  }
+}
+
+void WorldClockClient::endArray() {
+
+}
+
+void WorldClockClient::endObject() {
+
+}
+
+void WorldClockClient::endDocument() {
+
+}
+
+void WorldClockClient::startArray() {
+
+}
+
+void WorldClockClient::startObject() {
+
+}

WorldClockClient.h

@@ -0,0 +1,81 @@
+/**The MIT License (MIT)
+
+Copyright (c) 2015 by Daniel Eichhorn
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+See more at http://blog.squix.ch
+*/
+
+#pragma once
+
+#include <JsonListener.h>
+#include <JsonStreamingParser.h>
+#include <ESP8266WiFi.h>
+#include <WiFiClient.h>
+
+
+class WorldClockClient: public JsonListener {
+  private:
+    long millisOfDayAtUpdate = 0;
+    long localMillisAtUpdate;
+    boolean isHeader = true;
+    String currentKey = "";
+    String myLanguage;
+    String myCountry;
+    String* myTimeZoneIds;
+    int myNumberOfTimeZoneIds;
+    String myDateFormat;
+
+    int currentTimeZoneIndex;
+    long* timeZoneOffsetToUtcMillis;
+
+  public:
+    WorldClockClient(String language, String country, String dateFormat, int numberOfTimeZones, String* timeZoneIds);
+
+    void updateTime();
+
+    String getFormattedTime(int timeZoneIndex);
+
+    String getHours(int timeZoneIndex);
+
+    String getMinutes(int timeZoneIndex);
+
+    String getSeconds(int timeZoneIndex);
+
+    long getSecondsOfDay(int timeZoneIndex);
+
+    virtual void whitespace(char c);
+
+    virtual void startDocument();
+
+    virtual void key(String key);
+
+    virtual void value(String value);
+
+    virtual void endArray();
+
+    virtual void endObject();
+
+    virtual void endDocument();
+
+    virtual void startArray();
+
+    virtual void startObject();
+};