From f130700cf03941443b1a7fceed85451c66af37a9 Mon Sep 17 00:00:00 2001
From: Marcus <marcus@deltalima.org>
Date: Thu, 17 Oct 2024 22:43:56 +0200
Subject: [PATCH] add deleteFile() to CanGrow_LittleFS.h

---
 Arduino/CanGrow/CanGrow.ino                |  4 +--
 Arduino/CanGrow/include/CanGrow_LittleFS.h | 38 ++++++++++++++--------
 2 files changed, 26 insertions(+), 16 deletions(-)

diff --git a/Arduino/CanGrow/CanGrow.ino b/Arduino/CanGrow/CanGrow.ino
index 4422621..4243987 100644
--- a/Arduino/CanGrow/CanGrow.ino
+++ b/Arduino/CanGrow/CanGrow.ino
@@ -126,9 +126,9 @@ void setup() {
 
   LFS_init();
   if(existFile(CANGROW_CFG)) {
-    Serial.println(":: NICE");
+    readFile(CANGROW_CFG);
   } else {
-    //Panic();
+    writeFile(CANGROW_CFG, "{}");
   }
   
   // read the configfile from LittleFS
diff --git a/Arduino/CanGrow/include/CanGrow_LittleFS.h b/Arduino/CanGrow/include/CanGrow_LittleFS.h
index 451f179..2ffb915 100644
--- a/Arduino/CanGrow/include/CanGrow_LittleFS.h
+++ b/Arduino/CanGrow/include/CanGrow_LittleFS.h
@@ -46,7 +46,7 @@ void LFS_init() {
 }
 
 void LFS_format() {
-  Serial.println(":: [LittleFS] formatting");
+  Serial.println(":: [LittleFS] formatting...");
   // ESP32 LittleFS needs begin() first, otherwise it would crash
   // ESP8266 does not need it, so we leave it
   #ifdef ESP32
@@ -70,13 +70,11 @@ bool existFile(const char *path) {
   #endif
   
   if (!file) {
-    Serial.print(":: [LittleFS] File does not exist ");
-    Serial.println(path);
+    Serial.printf(":: [LittleFS] file does not exist: %s\n", path);
     file.close();  
     return false;
   } else {
-    Serial.print(":: [LittleFS] File does exist ");
-    Serial.println(path);
+    Serial.printf(":: [LittleFS] file does exist: %s\n", path);
     file.close();  
     return true;
   }
@@ -93,13 +91,11 @@ void readFile(const char *path) {
   #endif
   
   if (!file) {
-    Serial.print(":: [LittleFS] Failed to open file for reading ");
-    Serial.println(path);
+    Serial.printf(":: [LittleFS] FAILED to open file for reading: %s\n");
     return;
   }
 
-  Serial.print(":: [LittleFS] file content ");
-  Serial.println(path);
+  Serial.printf(":: [LittleFS] file content: %s\n", path);
   while (file.available()) { Serial.write(file.read()); }
   file.close();  
 }
@@ -115,21 +111,35 @@ void writeFile(const char *path, const char *message) {
   #endif
   
   if (!file) {
-    Serial.print(":: [LittleFS] Failed to open file for writing ");
-    Serial.println(path);
+    Serial.printf(":: [LittleFS] FAILED to open file for writing: %s\n", path);
     return;
   }
   if (file.print(message)) {
-    Serial.println("File written");
+    Serial.printf(":: [LittleFS] file written: %s\n", path);
   } else {
-    Serial.println("Write failed");
+    Serial.printf(":: [LittleFS] writing file FAILED: %s\n", path);
   }
   delay(2000);  // Make sure the CREATE and LASTWRITE times are different
   file.close();
 }
 
-void deleteFile() {
+void deleteFile(const char *path) {
+  #ifdef ESP32
+  fs::FS &fs = LittleFS;
+  File file = fs.open(path, FILE_WRITE);
+  #endif
   
+  Serial.printf(":: [LittleFS] deleting file: %s\n", path);
+  #ifdef ESP8266
+  if (LittleFS.remove(path)) {
+  #endif
+  #ifdef ESP32
+  if (fs.remove(path)) {
+  #endif
+    Serial.printf(":: [LittleFS] deleted file: %s\n", path);
+  } else {
+    Serial.printf(":: [LittleFS] deleting file FAILED: %s\n", path);
+  }
 }