* new DynamicConfigSerializer

* board/variant KeyValueStore now can write to 'custom' object in Json prefs

examples/companion_radio/MyMesh.cpp

@@ -990,7 +990,7 @@ void MyMesh::begin(bool has_display) {
   radio_driver.setTxPower(_prefs.tx_power_dbm);
   radio_driver.setRxBoostedGainMode(_prefs.rx_boosted_gain);
 
-  board.attachDynamicPrefs(_prefs.getRadioPrefs());
+  board.attachDynamicPrefs(_prefs.getCustom());
 
   MESH_DEBUG_PRINTLN("RX Boosted Gain Mode: %s",
                      radio_driver.getRxBoostedGainMode() ? "Enabled" : "Disabled");

examples/companion_radio/NodePrefs.h

@@ -2,6 +2,7 @@
 #include <cstdint> // For uint8_t, uint32_t
 #include <helpers/ConfigSerializer.h>
 #include <helpers/CommonRadioPrefs.h>
+#include <helpers/DynamicConfigSerializer.h>
 
 #define TELEM_MODE_DENY            0
 #define TELEM_MODE_ALLOW_FLAGS     1     // use contact.flags
@@ -154,6 +155,8 @@ private:
   };
   CompanionPrefs companion;
 
+  DynamicConfigSerializer custom;
+
 protected:
   void structure() override {
     def("name", node_name, sizeof(node_name));
@@ -165,9 +168,10 @@ protected:
     def("gps", gps);
     def("repeat", repeat);
     def("comp", companion);
+    def("custom", custom);
   }
 public:
-  NodePrefs() : radio(this), gps(this), companion(this) {
+  NodePrefs() : radio(this), gps(this), companion(this), custom(&radio) {
     node_name[0] = 0;
     default_scope_name[0] = 0;
     memset(default_scope_key, 0, sizeof(default_scope_key));
@@ -177,6 +181,8 @@ public:
   void setRepeatEn(bool en) { repeat.disable_fwd = en ? 0 : 1; }
 
   CommonRadioPrefs* getRadioPrefs() { return &radio; }
+  KeyValueStore* getCustom() { return &custom; }
+
   bool isDirty() const override { return ConfigSerializer::isDirty() || radio.isDirty(); }
   void clearDirty() override { ConfigSerializer::clearDirty(); radio.clearDirty(); }
 };

examples/simple_repeater/MyMesh.cpp

@@ -983,7 +983,7 @@ void MyMesh::begin(FILESYSTEM *fs) {
   MESH_DEBUG_PRINTLN("RX Boosted Gain Mode: %s",
                      radio_driver.getRxBoostedGainMode() ? "Enabled" : "Disabled");
 
-  board.attachDynamicPrefs(_prefs.getRadioPrefs());
+  board.attachDynamicPrefs(_prefs.getCustom());
 
   updateAdvertTimer();
   updateFloodAdvertTimer();

examples/simple_room_server/MyMesh.cpp

@@ -726,7 +726,7 @@ void MyMesh::begin(FILESYSTEM *fs) {
   radio_driver.setTxPower(_prefs.tx_power_dbm);
   radio_driver.setRxBoostedGainMode(_prefs.rx_boosted_gain);
 
-  board.attachDynamicPrefs(_prefs.getRadioPrefs());
+  board.attachDynamicPrefs(_prefs.getCustom());
 
   updateAdvertTimer();
   updateFloodAdvertTimer();

examples/simple_sensor/SensorMesh.cpp

@@ -772,7 +772,7 @@ void SensorMesh::begin(FILESYSTEM* fs) {
   radio_driver.setParams(_prefs.freq, _prefs.bw, _prefs.sf, _prefs.cr);
   radio_driver.setTxPower(_prefs.tx_power_dbm);
 
-  board.attachDynamicPrefs(_prefs.getRadioPrefs());
+  board.attachDynamicPrefs(_prefs.getCustom());
 
   updateAdvertTimer();
   updateFloodAdvertTimer();

src/helpers/CommonCLI.h

@@ -7,6 +7,7 @@
 #include <helpers/RegionMap.h>
 #include <helpers/ConfigSerializer.h>
 #include <helpers/CommonRadioPrefs.h>
+#include <helpers/DynamicConfigSerializer.h>
 
 #if defined(WITH_RS232_BRIDGE) || defined(WITH_ESPNOW_BRIDGE)
 #define WITH_BRIDGE
@@ -202,6 +203,8 @@ private:
   };
   RoomPrefs room;
 
+  DynamicConfigSerializer custom;
+
 protected:
   void structure() override {
     def("name", node_name, sizeof(node_name));
@@ -218,10 +221,11 @@ protected:
     def("repeat", repeat);
     def("room", room);
     def("power", power);
+    def("custom", custom);
   }
 
 public:
-  NodePrefs() : ConfigSerializer(), bridge(this), gps(this), radio(this), power(this), repeat(this), room(this) {
+  NodePrefs() : ConfigSerializer(), bridge(this), gps(this), radio(this), power(this), repeat(this), room(this), custom(&radio) {
     node_name[0] = 0;
     password[0] = 0;
     guest_password[0] = 0;
@@ -230,6 +234,8 @@ public:
   }
 
   CommonRadioPrefs* getRadioPrefs() { return &radio; }
+  KeyValueStore* getCustom() { return &custom; }
+
   bool isDirty() const override { return ConfigSerializer::isDirty() || radio.isDirty(); }
   void clearDirty() override { ConfigSerializer::clearDirty(); radio.clearDirty(); }
 };

src/helpers/CommonRadioPrefs.cpp

@@ -3,25 +3,29 @@
 #include "Utils.h"
 #include "target.h"
 
-void CommonRadioPrefs::getByKey(const char* key, char* value, size_t max_len) {
+bool CommonRadioPrefs::getByKey(const char* key, char* value, size_t max_len) {
   if (strcmp(key, "fem_rxgain") == 0) {
     snprintf(value, max_len, "%d", (uint32_t)getFEMRxGain());
-  } else if (strcmp(key, "fem_txgain") == 0) {
+    return true;
+  }
+  if (strcmp(key, "fem_txgain") == 0) {
     snprintf(value, max_len, "%d", (uint32_t)getFEMTxGain());
-  } else {
+    return true;
-    MESH_DEBUG_PRINTLN("Error: getBykey() unknown key: %s", key);
   }
+  return false;
 }
-void CommonRadioPrefs::setByKey(const char* key, const char* value) {
+bool CommonRadioPrefs::setByKey(const char* key, const char* value) {
   if (strcmp(key, "fem_rxgain") == 0) {
     setFEMRxGain(atoi(value));
     markDirty();
-  } else if (strcmp(key, "fem_txgain") == 0) {
+    return true;
+  }
+  if (strcmp(key, "fem_txgain") == 0) {
     setFEMTxGain(atoi(value));
     markDirty();
-  } else {
+    return true;
-    MESH_DEBUG_PRINTLN("Error: setBykey() unknown key: %s", key);
   }
+  return false;
 }
 
 bool CommonRadioPrefs::handleCommand(const char* command, uint32_t sender_timestamp, char* reply) {

src/helpers/CommonRadioPrefs.h

@@ -64,6 +64,6 @@ public:
 
   bool handleCommand(const char* command, uint32_t sender_timestamp, char* reply);
 
-  void setByKey(const char* key, const char* value) override;   // for dynamic key/value access
+  bool setByKey(const char* key, const char* value) override;   // for dynamic key/value access
-  void getByKey(const char* key, char* value, size_t max_len) override;
+  bool getByKey(const char* key, char* value, size_t max_len) override;
 };

src/helpers/DynamicConfigSerializer.cpp

@@ -0,0 +1,83 @@
+#include "DynamicConfigSerializer.h"
+#include <Utils.h>
+
+#define PROP_SEP_CHAR   '|'
+#define PROP_SEP_STR    "|"
+#define KEY_SEP_CHAR    ':'
+#define KEY_SEP_STR     ":"
+
+bool DynamicConfigSerializer::setByKey(const char* key, const char* value) {
+  if (_fallback && _fallback->setByKey(key, value)) return true;
+
+  // TODO: guard for bad chars (':' or '|')
+  char tmp[MAX_DYNAMIC_CONFG];
+  strcpy(tmp, _config);  // make a (modifiable) copy
+
+  const char* parts[8];
+  int n = mesh::Utils::parseTextParts(tmp, parts, 8, PROP_SEP_CHAR);
+
+  // add/replace in _config[]
+  char new_config[MAX_DYNAMIC_CONFG];
+  new_config[0] = 0;
+
+  int keylen = strlen(key);
+  for (int i = 0; i < n; i++) {
+    const char* item = parts[i];
+    if (item[keylen] == KEY_SEP_CHAR && memcmp(item, key, keylen) == 0) {
+      // key exists, so omit old value from this pass (will append new value at end)
+    } else {
+      if (new_config[0]) {
+        strcat(new_config, PROP_SEP_STR);
+      }
+      strcat(new_config, item);
+    }
+  }
+  // now append new key/value (if it fits)
+  if (strlen(new_config) + strlen(key) + strlen(value) + 2 < sizeof(_config)-1) {
+    strcat(new_config, key);
+    strcat(new_config, KEY_SEP_STR);
+    strcat(new_config, value);
+    strcpy(_config, new_config);  // commit new serialized string
+    return true;
+  }
+  return false;   // didn't fit in _config[]
+}
+
+bool DynamicConfigSerializer::getByKey(const char* key, char* value, size_t max_len) {
+  if (_fallback && _fallback->getByKey(key, value, max_len)) return true;
+
+  char tmp[MAX_DYNAMIC_CONFG];
+  strcpy(tmp, _config);  // make a (modifiable) copy
+
+  const char* parts[8];
+  int n = mesh::Utils::parseTextParts(tmp, parts, 8, PROP_SEP_CHAR);
+
+  int keylen = strlen(key);
+  for (int i = 0; i < n; i++) {
+    const char* item = parts[i];
+    if (item[keylen] == KEY_SEP_CHAR && memcmp(item, key, keylen) == 0) {
+      strncpy(value, &item[keylen+1], max_len);
+      value[max_len] = 0;
+      return true;
+    }
+  }
+  return false;
+}
+
+void DynamicConfigSerializer::structure() {
+  char tmp[MAX_DYNAMIC_CONFG];
+  strcpy(tmp, _config);  // make a (modifiable) copy
+
+  const char* parts[8];
+  int n = mesh::Utils::parseTextParts(tmp, parts, 8, PROP_SEP_CHAR);
+
+  // dynamically call def()'s
+  for (int i = 0; i < n; i++) {
+    char* item = (char *) parts[i];
+    char* eq = strchr(item, KEY_SEP_CHAR);
+    if (eq) {
+      *eq = 0;   // replace separator with null terminator
+      def(item, eq + 1, MAX_DYNAMIC_CONFG/2);  // maximum HALF of total for individual property value
+    }
+  }
+}

src/helpers/DynamicConfigSerializer.h

@@ -0,0 +1,20 @@
+#include "ConfigSerializer.h"
+#include "KeyValueStore.h"
+
+#ifndef MAX_DYNAMIC_CONFG
+  #define MAX_DYNAMIC_CONFG  128
+#endif
+
+class DynamicConfigSerializer : public ConfigSerializer, public KeyValueStore {
+  char _config[MAX_DYNAMIC_CONFG];
+  KeyValueStore* _fallback;
+
+protected:
+  void structure() override;
+
+public:
+  DynamicConfigSerializer(KeyValueStore* fallback = NULL) : _fallback(fallback) { _config[0] = 0; }
+
+  bool setByKey(const char* key, const char* value) override;
+  bool getByKey(const char* key, char* value, size_t max_len) override;
+};

src/helpers/KeyValueStore.h

@@ -6,6 +6,6 @@ class KeyValueStore {
 protected:
   KeyValueStore() { }
 public:
-  virtual void setByKey(const char* key, const char* value) { }
+  virtual bool setByKey(const char* key, const char* value) { return false; }
-  virtual void getByKey(const char* key, char* value, size_t max_len) { }
+  virtual bool getByKey(const char* key, char* value, size_t max_len) { return false; }
 };