config: abstract fs utils to fix esp32 builds

src/Config.h

@@ -2,7 +2,7 @@
 #include <Figments.h>
 #include "JsonCoordinateMapping.h"
 #include <ArduinoJson.h>
-#include <LittleFS.h>
+#include "FsUtils.h"
 
 class Configuration {
   public:
@@ -59,55 +59,8 @@ struct ConfigService: public Task {
     const CoordinateMapping* coordMap() const { return &m_jsonMap; }
     const char* loadedProfile() const;
     void overrideProfile(const char* profileName);
-    const char* getConfigValue(const char* key) const;
     const std::vector<Command>& commands() const override;
 
-    struct filename_iterator: public std::iterator<std::input_iterator_tag, const char*> {
-      Dir dir;
-      String ret;
-      bool valid;
-      const char* suffix;
-      explicit filename_iterator() : suffix(NULL), valid(false) {}
-      explicit filename_iterator(const char* path, const char* suffix) : dir(LittleFS.openDir(path)), valid(true), suffix(suffix) {
-        next();
-      }
-
-      void next() {
-        if (!valid) {
-          return;
-        }
-        int extPos = -1;
-        do {
-          valid = dir.next();
-          Log.info("valid %F", valid);
-          if (valid) {
-            String fname = dir.fileName();
-            extPos = fname.lastIndexOf(suffix);
-            Log.info("compare %s %d", fname.c_str(), extPos);
-            if (extPos != -1) {
-              ret = fname.substring(0, extPos);
-              Log.info("found %s", ret.c_str());
-            }
-          }
-        } while (valid && extPos == -1);
-      }
-
-      filename_iterator& operator++() {
-        next();
-        return *this;
-      }
-
-      filename_iterator& operator++(int) {filename_iterator ret = *this; ++(*this); return ret;}
-      bool operator==(const filename_iterator &other) const { return valid == other.valid;}
-      bool operator!=(const filename_iterator &other) const { return !(*this == other); }
-      const char* operator*() const {
-        if (!valid) {
-          return NULL;
-        }
-        return ret.c_str();
-      }
-    };
-
     filename_iterator mapsBegin() const { return filename_iterator("/maps/", ".json"); }
     filename_iterator mapsEnd() const { return filename_iterator(); }
 

src/FsUtils.cpp

@@ -0,0 +1,57 @@
+#include "FsUtils.h"
+
+filename_iterator::filename_iterator()
+  : suffix(NULL),
+    valid(false)
+{}
+
+filename_iterator::filename_iterator(const char* path, const char* suffix)
+#ifdef BOARD_ESP8266
+  : dir(LittleFS.openDir(path)),
+#endif
+#ifdef BOARD_ESP32
+  : dir(LittleFS.open(path)),
+#endif
+    valid(true),
+    suffix(suffix)
+{
+  next();
+}
+
+void
+filename_iterator::next()
+{
+  if (!valid) {
+    return;
+  }
+  int extPos = -1;
+  do {
+#ifdef BOARD_ESP8266
+    valid = dir.next();
+    if (valid) {
+      String fname = dir.fileName();
+      extPos = fname.lastIndexOf(suffix);
+      if (extPos != -1) {
+        ret = fname.substring(0, extPos);
+      }
+    }
+#endif
+#ifdef BOARD_ESP32
+    File next = dir.openNextFile();
+    valid = (bool)next;
+    if (valid && !next.isDirectory()) {
+      String fname = next.name();
+      extPos = fname.lastIndexOf(suffix);
+      if (extPos != -1) {
+        ret = fname.substring(0, extPos);
+      }
+    }
+#endif
+  } while (valid && extPos == -1);
+}
+
+filename_iterator& filename_iterator::operator++()
+{
+  next();
+  return *this;
+}

src/FsUtils.h

@@ -0,0 +1,33 @@
+#pragma once
+#include <iterator>
+
+#include <LittleFS.h>
+
+struct filename_iterator: public std::iterator<std::input_iterator_tag, const char*> {
+  public:
+    filename_iterator();
+    filename_iterator(const char* path, const char* suffix);
+    void next();
+    filename_iterator& operator++();
+    filename_iterator& operator++(int) {filename_iterator ret = *this; ++(*this); return ret;}
+    bool operator==(const filename_iterator &other) const { return valid == other.valid;}
+    bool operator!=(const filename_iterator &other) const { return !(*this == other); }
+    const char* operator*() const {
+      if (!valid) {
+        return NULL;
+      }
+      return ret.c_str();
+    }
+
+  private:
+    String ret;
+    bool valid;
+    const char* suffix;
+
+#ifdef BOARD_ESP8266
+    Dir dir;
+#endif
+#ifdef BOARD_ESP32
+    File dir;
+#endif
+};