commit fe25fdda6ab46cac7ab9003b0388a23e6d58f3f7
Author: James <james@jhodges.co.uk>
Date:   Thu Dec 29 18:49:56 2022 +0000

    init

diff --git a/src/logger.cpp b/src/logger.cpp
new file mode 100644
index 0000000..f6c970c
--- /dev/null
+++ b/src/logger.cpp
@@ -0,0 +1,64 @@
+#include "logger.h"
+#define LOGGER_BUFFER_SIZE 4096
+
+//Levels: 0none, 1error, 2warning, 3info, 4debug, 5verbose
+
+static char buffer[LOGGER_BUFFER_SIZE]="";
+
+void add_to_buff(char *msg);
+
+void logger(byte level, const char* format, ...)
+{
+    if(level>settings.log_level_local && level>settings.log_level_remote){
+        return;
+    }
+    static char msg[256];
+    va_list argptr;
+    va_start(argptr, format);
+    vsnprintf(msg,256, format, argptr);
+    va_end(argptr);
+
+    static char tmp[256];
+    snprintf(tmp,256,"%d[%d] (%d) %s\r\n",millis(),level,esp_get_free_heap_size(),msg);
+
+    if(level<=settings.log_level_local){
+        Serial.print(tmp);
+    }
+    if(level<=settings.log_level_remote){
+        add_to_buff(tmp);
+    }
+}
+
+void add_to_buff(char *msg){
+    if(strlen(buffer)+strlen(msg)+1>=LOGGER_BUFFER_SIZE){
+        File log=SPIFFS.open("/log.txt","a");
+        log.print(buffer);
+        log.close();
+        buffer[0]=0;
+        logger(3,"Log buffer full, written to SPIFFS");
+    }
+    strcpy(buffer+strlen(buffer),msg);
+}
+
+long logger_get_size(){
+    long s=0;
+    File file=SPIFFS.open("/log.txt");
+    s+=file.size();
+    file.close();
+    s+=strlen(buffer);
+    return s;
+}
+
+void logger_dump(Print *dest){
+    File file=SPIFFS.open("/log.txt");
+    while(file.available()){
+        dest->write(file.read());
+    }
+    file.close();
+    dest->print(buffer);
+}
+
+void logger_clear(){
+    buffer[0]=0;
+    SPIFFS.remove("/log.txt");
+}
diff --git a/src/logger.h b/src/logger.h
new file mode 100644
index 0000000..e129352
--- /dev/null
+++ b/src/logger.h
@@ -0,0 +1,13 @@
+#ifndef LOGGER_H
+#define LOGGER_H
+
+#include <Arduino.h>
+#include "filesystem.h"
+#include "settings.h"
+
+void logger(byte level, const char* format, ...);
+long logger_get_size();
+void logger_clear();
+void logger_dump(Print *dest);
+
+#endif