/
CSVEditor.cpp
129 lines (115 loc) · 2.89 KB
/
CSVEditor.cpp
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
#include "CSVEditor.h"
CSVEditor::CSVEditor(String fileName, int chipSelectPin, bool debug)
: fileName(fileName), chipSelectPin(chipSelectPin), debug(debug) {
if (!SD.begin(chipSelectPin)) {
debugMessage("SD card initialization failed!");
return;
}
debugMessage("SD card initialization done.");
}
CSVEditor::~CSVEditor() {
closeFile();
}
void CSVEditor::writeHeader(String header) {
if (!SD.exists(fileName)) {
writeData(header);
}
}
void CSVEditor::writeData(String data) {
if (openFile(FILE_WRITE)) {
dataFile.println(data);
closeFile();
debugMessage("Data written");
} else {
debugMessage("Error opening file to write data");
}
}
String CSVEditor::readLastRow() {
String lastLine = "";
if (openFile(FILE_READ)) {
while (dataFile.available()) {
String line = dataFile.readStringUntil('\n');
if (line.length() > 0) {
lastLine = line;
}
}
closeFile();
} else {
debugMessage("Error opening file to read");
}
return lastLine;
}
void CSVEditor::checkAndHandleFileSize() {
if (openFile(FILE_READ)) {
size_t fileSize = dataFile.size();
if (fileSize > MAX_FILE_SIZE) { // Define MAX_FILE_SIZE as per your needs
String header = readHeader();
String lastRow = readLastRow();
String newFileName = "new_" + fileName;
dataFile.close();
// Create new file and write header and last row
fileName = newFileName;
writeHeader(header);
writeData(lastRow);
// Rename old file
String oldFileName = fileName;
int commaIndex = lastRow.indexOf(',');
if (commaIndex != -1) {
oldFileName = lastRow.substring(0, commaIndex);
}
renameFile(dataFile, fileName, oldFileName);
// Rename new file to original file name
renameFile(dataFile, newFileName, fileName);
}
closeFile();
} else {
debugMessage("Error opening file to check size");
}
}
String CSVEditor::readHeader() {
String header = "";
if (openFile(FILE_READ)) {
header = dataFile.readStringUntil('\n');
closeFile();
} else {
debugMessage("Error opening file to read header");
}
return header;
}
bool CSVEditor::openFile(uint8_t mode) {
if (dataFile) {
dataFile.close();
}
dataFile = SD.open(fileName, mode);
return dataFile;
}
void CSVEditor::closeFile() {
if (dataFile) {
dataFile.close();
}
}
bool CSVEditor::renameFile(File &file, const String &oldName, const String &newName) {
if (SD.exists(newName)) {
SD.remove(newName);
}
file.close();
file = SD.open(oldName);
if (!file) {
return false;
}
File newFile = SD.open(newName, FILE_WRITE);
if (!newFile) {
return false;
}
while (file.available()) {
newFile.write(file.read());
}
newFile.close();
file.close();
return SD.remove(oldName);
}
void CSVEditor::debugMessage(const String &message) {
if (debug) {
Serial.println(message);
}
}