Initial import of WAVE_ROVER_V1.0
This commit is contained in:
Joshua Sacherer
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// funcs for editing the files in flash.
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bool flashStatus = false;
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// initialize littleFS for flash file system ctrl.
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void initFS() {
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if (!LittleFS.begin(true)){
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if (InfoPrint == 1) {Serial.println("LittleFS mount failed.");}
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flashStatus = false;
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}
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else {
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if (InfoPrint == 1) {Serial.println("LittleFS mount succeed.");}
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flashStatus = true;
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}
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}
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// get the free space of flash.
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uint32_t freeFlashSpace(){
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size_t total = LittleFS.totalBytes();
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size_t used = LittleFS.usedBytes();
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uint32_t freeSpace = total - used;
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if (InfoPrint == 1) {
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Serial.print("totalBytes:\t");Serial.print(total);
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Serial.println(" bytes");
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Serial.print("free flash memory:\t");Serial.print(freeSpace);
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Serial.println(" bytes");
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}
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jsonInfoHttp.clear();
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jsonInfoHttp["info"] = "free flash space";
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jsonInfoHttp["total"] = total;
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jsonInfoHttp["free"] = freeSpace;
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return freeSpace;
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}
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// scan all the files saved in flash.
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void scanFlashContents() {
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jsonInfoHttp.clear();
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File root = LittleFS.open("/");
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if (!root.isDirectory()) {
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if (InfoPrint == 1) {
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Serial.println("error: not a directory.");
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jsonInfoHttp["info"] = "error: not a directory.";
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return;
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}
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}
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jsonInfoHttp["info"] = "reading files and the first line";
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File file = root.openNextFile();
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while (file) {
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if (!file.isDirectory()) {
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Serial.println(">>>---=== File Name and First line ===---<<<");
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Serial.println("[file]: [" + String(file.name()) + "]");
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Serial.println("[first line]:");
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String line = file.readStringUntil('\n');
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if (line) {
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Serial.println(line);
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jsonInfoHttp[file.name()] = line;
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} else {
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Serial.println("no content.");
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jsonInfoHttp[file.name()] = "[null]";
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}
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file.close();
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} else if (file.isDirectory()) {
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if (file) {
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Serial.println("Failed to open file: " + String(file.name()));
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jsonInfoHttp[file.name()] = "[failed to open]";
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}
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}
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file = root.openNextFile();
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}
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}
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// create a new file and input the content.
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bool createFile(String fileName, String fileContent) {
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jsonInfoHttp.clear();
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if (!flashStatus) {
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if (InfoPrint == 1) {Serial.println("LittleFS mount failed.");}
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jsonInfoHttp["info"] = "LittleFS mount failed.";
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return false;
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}
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if (LittleFS.exists("/"+fileName)) {
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if (InfoPrint == 1) {Serial.println("file already exists.");}
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jsonInfoHttp["info"] = "file already exists.";
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return false;
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}
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File file = LittleFS.open("/"+fileName, "w");
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if (file) {
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// file.println("{\"name\":\"" + fileName + "\",\"intro\":\"" + fileContent + "\"}");
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file.println(fileContent);
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file.close();
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if (InfoPrint == 1) {Serial.println("file created successfully.");}
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jsonInfoHttp["info"] = "file created successfully.";
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return true;
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} else {
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if (InfoPrint == 1) {Serial.println("file creation failed.");}
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jsonInfoHttp["info"] = "file creation failed.";
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return false;
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}
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}
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// read a file, this function return the lineNum.
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int readFile(String fileName) {
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jsonInfoHttp.clear();
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jsonInfoHttp["info"] = "reading file";
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File file = LittleFS.open("/" + fileName, "r");
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if (!file) {
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Serial.println("file not found.");
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jsonInfoHttp["info"] = "file not found";
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return -1;
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}
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Serial.println("---=== File Content ===---");
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Serial.println("reading file: [" + fileName + "] starts:");
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jsonInfoHttp["name"] = fileName;
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int _LineNum = -1;
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while (file.available()) {
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_LineNum++;
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String line = file.readStringUntil('\n');
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Serial.print("[lineNum: ");Serial.print(_LineNum+1);Serial.print(" ] - ");
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Serial.println(line);
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jsonInfoHttp["lineNum_"+String(_LineNum+1)] = line;
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}
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Serial.println("^^^ ^^^ ^^^ reading file: " + fileName + " ends. ^^^ ^^^ ^^^");
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file.close();
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return _LineNum + 1;
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}
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// delete a file.
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bool deleteFile(String inputName) {
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jsonInfoHttp.clear();
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if (!flashStatus) {
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if (InfoPrint == 1) {Serial.println("LittleFS mount failed.");}
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jsonInfoHttp["info"] = "LittleFS mount failed.";
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return false;
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}
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if (!LittleFS.exists("/" + inputName)) {
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if (InfoPrint == 1) {Serial.println("file already deleted.");}
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jsonInfoHttp["info"] = "file already deleted.";
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return false;
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}
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LittleFS.remove("/" + inputName);
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if (InfoPrint == 1) {Serial.println("file deleted successfully.");}
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jsonInfoHttp["info"] = "file deleted successfully.";
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return true;
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}
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// add content at the end of a file.
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void appendLine(String fileName, String appendContent) {
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Serial.println("--- --- --- RAW FILE -- --- ---");
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if (readFile(fileName) == -1) {return;}
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File file = LittleFS.open("/" + fileName, "a");
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if(!file){
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Serial.println("Error opening file for appending.");
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return;
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}
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file.println(appendContent);
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file.close();
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Serial.println("--- --- --- NEW FILE -- --- ---");
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jsonInfoHttp.clear();
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readFile(fileName);
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}
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// insert a new line under the lineNum.
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void insertLine(String filename, int lineNum, String newLineString) {
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Serial.println("--- --- --- RAW FILE -- --- ---");
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int _LineNum = readFile(filename);
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if (_LineNum == -1) {return;}
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String lines[_LineNum+1];
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File file = LittleFS.open("/" + filename, "r");
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if(!file){
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Serial.println("Error opening file for writing.");
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return;
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}
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int i = 0;
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while (file.available()) {
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if (i == lineNum - 1) {
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lines[i] = newLineString;
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i++;
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}
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lines[i] = file.readStringUntil('\n');
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i++;
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}
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file.close();
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file = LittleFS.open("/" + filename, "w");
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for(int j=0; j<i; j++){
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file.println(lines[j]);
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}
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file.close();
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Serial.println("--- --- --- NEW FILE -- --- ---");
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jsonInfoHttp.clear();
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readFile(filename);
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}
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// change a single line in the file.
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void replaceLine(String filename, int lineNum, String newLineString) {
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Serial.println("--- --- --- RAW FILE -- --- ---");
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int _LineNum = readFile(filename);
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if (_LineNum == -1) {return;}
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String lines[_LineNum];
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File file = LittleFS.open("/" + filename, "r");
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if(!file){
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Serial.println("Error opening file.");
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return;
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}
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int i = 0;
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while (file.available()) {
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lines[i] = file.readStringUntil('\n');
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i++;
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}
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file.close();
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lines[lineNum-1] = newLineString;
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file = LittleFS.open("/" + filename, "w");
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for(int j=0; j<i; j++){
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file.println(lines[j]);
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}
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file.close();
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Serial.println("--- --- --- NEW FILE -- --- ---");
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jsonInfoHttp.clear();
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readFile(filename);
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}
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// read a single line from file.
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String readSingleLine(String filename, int lineNum) {
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File file = LittleFS.open("/" + filename, "r");
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if(!file){
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Serial.println("Error opening file.");
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return "";
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}
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jsonInfoHttp.clear();
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String line;
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int i = 0;
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while (file.available()) {
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line = file.readStringUntil('\n');
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if (i == lineNum-1) {
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file.close();
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if (InfoPrint == 1) {
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Serial.println(line);
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jsonInfoHttp["filename"] = filename;
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jsonInfoHttp["lineNum"] = lineNum;
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}
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return line;
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}
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i++;
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}
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file.close();
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if (InfoPrint == 1) {
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Serial.println("[line not found]");
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}
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return "";
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}
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void deleteSingleLine(String fileName, int lineNum){
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Serial.println("--- --- --- RAW FILE -- --- ---");
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File file = LittleFS.open("/" + fileName, "r+");
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readFile(fileName);
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if(!file){
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Serial.println("Error opening file for reading");
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return;
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}
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String contents = "";
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int i = 1;
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while(file.available()){
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String line = file.readStringUntil('\n');
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if(i != lineNum){
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contents += line + "\n";
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}
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i++;
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}
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file.close();
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file = LittleFS.open("/" + fileName, "w");
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file.print(contents);
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file.close();
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Serial.println("--- --- --- NEW FILE -- --- ---");
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jsonInfoHttp.clear();
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readFile(fileName);
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}
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