* companion: refactor of all filesystem access to new DataStore module

examples/companion_radio/DataStore.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <helpers/IdentityStore.h>
+#include <helpers/ContactInfo.h>
+#include <helpers/ChannelDetails.h>
+#include "NodePrefs.h"
+
+class DataStoreHost {
+public:
+  virtual bool onContactLoaded(const ContactInfo& contact) =0;
+  virtual bool getContactForSave(uint32_t idx, ContactInfo& contact) =0;
+  virtual bool onChannelLoaded(uint8_t channel_idx, const ChannelDetails& ch) =0;
+  virtual bool getChannelForSave(uint8_t channel_idx, ChannelDetails& ch) =0;
+};
+
+class DataStore {
+  FILESYSTEM* _fs;
+  IdentityStore identity_store;
+
+  void loadPrefsInt(const char *filename, NodePrefs& prefs, double& node_lat, double& node_lon);
+
+  public:
+  DataStore(FILESYSTEM& fs);
+  void begin();
+  bool formatFileSystem();
+  bool loadMainIdentity(mesh::LocalIdentity &identity);
+  bool saveMainIdentity(const mesh::LocalIdentity &identity);
+  void loadPrefs(NodePrefs& prefs, double& node_lat, double& node_lon);
+  void savePrefs(const NodePrefs& prefs, double node_lat, double node_lon);
+  void loadContacts(DataStoreHost* host);
+  void saveContacts(DataStoreHost* host);
+  void loadChannels(DataStoreHost* host);
+  void saveChannels(DataStoreHost* host);
+  int  getBlobByKey(const uint8_t key[], int key_len, uint8_t dest_buf[]);
+  bool putBlobByKey(const uint8_t key[], int key_len, const uint8_t src_buf[], int len);
+};