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Added world clock demo
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‎WorldClockClient.cpp

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

‎WorldClockClient.h

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/**The MIT License (MIT)
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Copyright (c) 2015 by Daniel Eichhorn
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Permission is hereby granted, free of charge, to any person obtaining a copy
6+
of this software and associated documentation files (the "Software"), to deal
7+
in the Software without restriction, including without limitation the rights
8+
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9+
copies of the Software, and to permit persons to whom the Software is
10+
furnished to do so, subject to the following conditions:
11+
12+
The above copyright notice and this permission notice shall be included in all
13+
copies or substantial portions of the Software.
14+
15+
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16+
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17+
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18+
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19+
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20+
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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See more at http://blog.squix.ch
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*/
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#pragma once
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#include <JsonListener.h>
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#include <JsonStreamingParser.h>
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#include <ESP8266WiFi.h>
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#include <WiFiClient.h>
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class WorldClockClient: public JsonListener {
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private:
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long millisOfDayAtUpdate = 0;
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long localMillisAtUpdate;
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boolean isHeader = true;
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String currentKey = "";
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String myLanguage;
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String myCountry;
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String* myTimeZoneIds;
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int myNumberOfTimeZoneIds;
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String myDateFormat;
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int currentTimeZoneIndex;
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long* timeZoneOffsetToUtcMillis;
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public:
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WorldClockClient(String language, String country, String dateFormat, int numberOfTimeZones, String* timeZoneIds);
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void updateTime();
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String getFormattedTime(int timeZoneIndex);
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String getHours(int timeZoneIndex);
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String getMinutes(int timeZoneIndex);
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String getSeconds(int timeZoneIndex);
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long getSecondsOfDay(int timeZoneIndex);
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virtual void whitespace(char c);
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virtual void startDocument();
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virtual void key(String key);
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virtual void value(String value);
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virtual void endArray();
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virtual void endObject();
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virtual void endDocument();
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virtual void startArray();
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virtual void startObject();
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};

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