1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
|
// convert epochtime to JavaScripte Date object
function epochToJsDate(epochTime){
return new Date(epochTime*1000);
}
// convert time to human-readable format YYYY/MM/DD HH:MM:SS
function epochToDateTime(epochTime){
var epochDate = new Date(epochToJsDate(epochTime));
var dateTime = epochDate.getFullYear() + "/" +
("00" + (epochDate.getMonth() + 1)).slice(-2) + "/" +
("00" + epochDate.getDate()).slice(-2) + " " +
("00" + epochDate.getHours()).slice(-2) + ":" +
("00" + epochDate.getMinutes()).slice(-2) + ":" +
("00" + epochDate.getSeconds()).slice(-2);
return dateTime;
}
// function to plot values on charts
function plotValues(chart, timestamp, value){
var x = epochToJsDate(timestamp).getTime();
var y = Number (value);
if(chart.series[0].data.length > 40) {
chart.series[0].addPoint([x, y], true, true, true);
} else {
chart.series[0].addPoint([x, y], true, false, true);
}
}
// DOM elements
const loginElement = document.querySelector('#login-form');
const contentElement = document.querySelector("#content-sign-in");
const userDetailsElement = document.querySelector('#user-details');
const authBarElement = document.querySelector('#authentication-bar');
const deleteButtonElement = document.getElementById('delete-button');
const deleteModalElement = document.getElementById('delete-modal');
const deleteDataFormElement = document.querySelector('#delete-data-form');
const viewDataButtonElement = document.getElementById('view-data-button');
const hideDataButtonElement = document.getElementById('hide-data-button');
const tableContainerElement = document.querySelector('#table-container');
const chartsRangeInputElement = document.getElementById('charts-range');
const loadDataButtonElement = document.getElementById('load-data');
const cardsCheckboxElement = document.querySelector('input[name=cards-checkbox]');
const gaugesCheckboxElement = document.querySelector('input[name=gauges-checkbox]');
const chartsCheckboxElement = document.querySelector('input[name=charts-checkbox]');
// DOM elements for sensor readings
const cardsReadingsElement = document.querySelector("#cards-div");
const gaugesReadingsElement = document.querySelector("#gauges-div");
const chartsDivElement = document.querySelector('#charts-div');
const tempElement = document.getElementById("temp");
const humElement = document.getElementById("hum");
const updateElement = document.getElementById("lastUpdate")
// MANAGE LOGIN/LOGOUT UI
const setupUI = (user) => {
if (user) {
//toggle UI elements
loginElement.style.display = 'none';
contentElement.style.display = 'block';
authBarElement.style.display ='block';
userDetailsElement.style.display ='block';
userDetailsElement.innerHTML = user.email;
// get user UID to get data from database
var uid = user.uid;
console.log(uid);
// Database paths (with user UID)
var dbPath = 'UsersData/' + uid.toString() + '/readings';
var chartPath = 'UsersData/' + uid.toString() + '/charts/range';
// Database references
var dbRef = firebase.database().ref(dbPath);
var chartRef = firebase.database().ref(chartPath);
// CHARTS
// Number of readings to plot on charts
var chartRange = 0;
// Get number of readings to plot saved on database (runs when the page first loads and whenever there's a change in the database)
chartRef.on('value', snapshot =>{
chartRange = Number(snapshot.val());
console.log(chartRange);
// Delete all data from charts to update with new values when a new range is selected
chartT.destroy();
chartH.destroy();
// Render new charts to display new range of data
chartT = createTemperatureChart();
chartH = createHumidityChart();
// Update the charts with the new range
// Get the latest readings and plot them on charts (the number of plotted readings corresponds to the chartRange value)
dbRef.orderByKey().limitToLast(chartRange).on('child_added', snapshot =>{
var jsonData = snapshot.toJSON(); // example: {temperature: 25.02, humidity: 50.20, pressure: 1008.48, timestamp:1641317355}
// Save values on variables
var temperature = jsonData.temperature;
var humidity = jsonData.humidity;
var timestamp = jsonData.timestamp;
// Plot the values on the charts
plotValues(chartT, timestamp, temperature);
plotValues(chartH, timestamp, humidity);
});
});
// Update database with new range (input field)
chartsRangeInputElement.onchange = () =>{
chartRef.set(chartsRangeInputElement.value);
};
//CHECKBOXES
// Checbox (cards for sensor readings)
cardsCheckboxElement.addEventListener('change', (e) =>{
if (cardsCheckboxElement.checked) {
cardsReadingsElement.style.display = 'block';
}
else{
cardsReadingsElement.style.display = 'none';
}
});
// Checbox (gauges for sensor readings)
gaugesCheckboxElement.addEventListener('change', (e) =>{
if (gaugesCheckboxElement.checked) {
gaugesReadingsElement.style.display = 'block';
}
else{
gaugesReadingsElement.style.display = 'none';
}
});
// Checbox (charta for sensor readings)
chartsCheckboxElement.addEventListener('change', (e) =>{
if (chartsCheckboxElement.checked) {
chartsDivElement.style.display = 'block';
}
else{
chartsDivElement.style.display = 'none';
}
});
// CARDS
// Get the latest readings and display on cards
dbRef.orderByKey().limitToLast(1).on('child_added', snapshot =>{
var jsonData = snapshot.toJSON(); // example: {temperature: 25.02, humidity: 50.20, pressure: 1008.48, timestamp:1641317355}
var temperature = jsonData.temperature;
var humidity = jsonData.humidity;
var timestamp = jsonData.timestamp;
// Update DOM elements
tempElement.innerHTML = temperature;
humElement.innerHTML = humidity;
updateElement.innerHTML = epochToDateTime(timestamp);
});
// GAUGES
// Get the latest readings and display on gauges
dbRef.orderByKey().limitToLast(1).on('child_added', snapshot =>{
var jsonData = snapshot.toJSON(); // example: {temperature: 25.02, humidity: 50.20, pressure: 1008.48, timestamp:1641317355}
var temperature = jsonData.temperature;
var humidity = jsonData.humidity;
var timestamp = jsonData.timestamp;
// Update DOM elements
var gaugeT = createTemperatureGauge();
var gaugeH = createHumidityGauge();
gaugeT.draw();
gaugeH.draw();
gaugeT.value = temperature;
gaugeH.value = humidity;
updateElement.innerHTML = epochToDateTime(timestamp);
});
// DELETE DATA
// Add event listener to open modal when click on "Delete Data" button
deleteButtonElement.addEventListener('click', e =>{
console.log("Remove data");
e.preventDefault;
deleteModalElement.style.display="block";
});
// Add event listener when delete form is submited
deleteDataFormElement.addEventListener('submit', (e) => {
// delete data (readings)
dbRef.remove();
});
// TABLE
var lastReadingTimestamp; //saves last timestamp displayed on the table
// Function that creates the table with the first 100 readings
function createTable(){
// append all data to the table
var firstRun = true;
dbRef.orderByKey().limitToLast(100).on('child_added', function(snapshot) {
if (snapshot.exists()) {
var jsonData = snapshot.toJSON();
console.log(jsonData);
var temperature = jsonData.temperature;
var humidity = jsonData.humidity;
var timestamp = jsonData.timestamp;
var content = '';
content += '<tr>';
content += '<td>' + epochToDateTime(timestamp) + '</td>';
content += '<td>' + temperature + '</td>';
content += '<td>' + humidity + '</td>';
content += '</tr>';
$('#tbody').prepend(content);
// Save lastReadingTimestamp --> corresponds to the first timestamp on the returned snapshot data
if (firstRun){
lastReadingTimestamp = timestamp;
firstRun=false;
console.log(lastReadingTimestamp);
}
}
});
};
// append readings to table (after pressing More results... button)
function appendToTable(){
var dataList = []; // saves list of readings returned by the snapshot (oldest-->newest)
var reversedList = []; // the same as previous, but reversed (newest--> oldest)
console.log("APEND");
dbRef.orderByKey().limitToLast(100).endAt(lastReadingTimestamp).once('value', function(snapshot) {
// convert the snapshot to JSON
if (snapshot.exists()) {
snapshot.forEach(element => {
var jsonData = element.toJSON();
dataList.push(jsonData); // create a list with all data
});
lastReadingTimestamp = dataList[0].timestamp; //oldest timestamp corresponds to the first on the list (oldest --> newest)
reversedList = dataList.reverse(); // reverse the order of the list (newest data --> oldest data)
var firstTime = true;
// loop through all elements of the list and append to table (newest elements first)
reversedList.forEach(element =>{
if (firstTime){ // ignore first reading (it's already on the table from the previous query)
firstTime = false;
}
else{
var temperature = element.temperature;
var humidity = element.humidity;
var timestamp = element.timestamp;
var content = '';
content += '<tr>';
content += '<td>' + epochToDateTime(timestamp) + '</td>';
content += '<td>' + temperature + '</td>';
content += '<td>' + humidity + '</td>';
content += '</tr>';
$('#tbody').append(content);
}
});
}
});
}
viewDataButtonElement.addEventListener('click', (e) =>{
// Toggle DOM elements
tableContainerElement.style.display = 'block';
viewDataButtonElement.style.display ='none';
hideDataButtonElement.style.display ='inline-block';
loadDataButtonElement.style.display = 'inline-block'
createTable();
});
loadDataButtonElement.addEventListener('click', (e) => {
appendToTable();
});
hideDataButtonElement.addEventListener('click', (e) => {
tableContainerElement.style.display = 'none';
viewDataButtonElement.style.display = 'inline-block';
hideDataButtonElement.style.display = 'none';
});
// IF USER IS LOGGED OUT
} else{
// toggle UI elements
loginElement.style.display = 'block';
authBarElement.style.display ='none';
userDetailsElement.style.display ='none';
contentElement.style.display = 'none';
}
} |
