meshcore-bot-firmware/patches/meshcore/0001-Add-companion-firmware-bot-core.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: cj-vana <cj@depth23.online>
Date: Thu, 14 May 2026 14:03:07 -0600
Subject: [PATCH 1/2] Add companion firmware bot core

---
 examples/companion_radio/BotPolicy.cpp   |  58 +++++++
 examples/companion_radio/BotPolicy.h     |  12 ++
 examples/companion_radio/BotTypes.h      |  99 ++++++++++++
 examples/companion_radio/FirmwareBot.cpp | 193 +++++++++++++++++++++++
 examples/companion_radio/FirmwareBot.h   |  13 ++
 5 files changed, 375 insertions(+)
 create mode 100644 examples/companion_radio/BotPolicy.cpp
 create mode 100644 examples/companion_radio/BotPolicy.h
 create mode 100644 examples/companion_radio/BotTypes.h
 create mode 100644 examples/companion_radio/FirmwareBot.cpp
 create mode 100644 examples/companion_radio/FirmwareBot.h

diff --git a/examples/companion_radio/BotPolicy.cpp b/examples/companion_radio/BotPolicy.cpp
new file mode 100644
index 00000000..bd3fc6c7
--- /dev/null
+++ b/examples/companion_radio/BotPolicy.cpp
@@ -0,0 +1,58 @@
+#include "BotPolicy.h"
+
+#include <ctype.h>
+#include <string.h>
+
+namespace {
+
+bool equalsIgnoreCase(const char* value, size_t len, const char* expected) {
+  if (!value || !expected) return false;
+
+  if (len > 0 && value[0] == '#') {
+    value++;
+    len--;
+  }
+
+  size_t expected_len = strlen(expected);
+  if (expected_len > 0 && expected[0] == '#') {
+    expected++;
+    expected_len--;
+  }
+  if (len != expected_len) return false;
+
+  for (size_t i = 0; i < len; i++) {
+    if (tolower((unsigned char)value[i]) != tolower((unsigned char)expected[i])) return false;
+  }
+  return true;
+}
+
+}
+
+namespace BotPolicy {
+
+BotChannelKind classifyChannel(const char* name, size_t len, bool direct_message) {
+  if (direct_message) return BOT_CHANNEL_DM;
+  if (equalsIgnoreCase(name, len, "Public")) return BOT_CHANNEL_PUBLIC;
+  if (equalsIgnoreCase(name, len, "#bot")) return BOT_CHANNEL_BOT;
+  if (equalsIgnoreCase(name, len, "#testing")) return BOT_CHANNEL_TESTING;
+  if (equalsIgnoreCase(name, len, "#emergency")) return BOT_CHANNEL_EMERGENCY;
+  return BOT_CHANNEL_OTHER;
+}
+
+BotPolicyDecision decide(BotChannelKind kind) {
+  if (kind == BOT_CHANNEL_DM || kind == BOT_CHANNEL_BOT || kind == BOT_CHANNEL_TESTING) {
+    return BOT_POLICY_ALLOW_NORMAL;
+  }
+  if (kind == BOT_CHANNEL_EMERGENCY) return BOT_POLICY_EMERGENCY_FORWARD;
+  return BOT_POLICY_IGNORE;
+}
+
+bool isNormalAllowed(BotChannelKind kind) {
+  return decide(kind) == BOT_POLICY_ALLOW_NORMAL;
+}
+
+bool isEmergency(BotChannelKind kind) {
+  return decide(kind) == BOT_POLICY_EMERGENCY_FORWARD;
+}
+
+}
diff --git a/examples/companion_radio/BotPolicy.h b/examples/companion_radio/BotPolicy.h
new file mode 100644
index 00000000..e074e3eb
--- /dev/null
+++ b/examples/companion_radio/BotPolicy.h
@@ -0,0 +1,12 @@
+#pragma once
+
+#include "BotTypes.h"
+
+namespace BotPolicy {
+
+BotChannelKind classifyChannel(const char* name, size_t len, bool direct_message);
+BotPolicyDecision decide(BotChannelKind kind);
+bool isNormalAllowed(BotChannelKind kind);
+bool isEmergency(BotChannelKind kind);
+
+}
diff --git a/examples/companion_radio/BotTypes.h b/examples/companion_radio/BotTypes.h
new file mode 100644
index 00000000..869ae3ae
--- /dev/null
+++ b/examples/companion_radio/BotTypes.h
@@ -0,0 +1,99 @@
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+
+#define BOT_MAX_TEXT_LEN 160
+#define BOT_MAX_RESPONSE_LEN 144
+#define BOT_MAX_COMMAND_NAME_LEN 15
+#define BOT_MAX_COMMAND_ARGS_LEN 79
+#define BOT_MAX_CHANNEL_NAME_LEN 23
+#define BOT_MAX_SENDER_NAME_LEN 31
+#define BOT_SENDER_KEY_PREFIX_LEN 6
+
+enum BotChannelKind : uint8_t {
+  BOT_CHANNEL_DM = 0,
+  BOT_CHANNEL_PUBLIC,
+  BOT_CHANNEL_BOT,
+  BOT_CHANNEL_TESTING,
+  BOT_CHANNEL_EMERGENCY,
+  BOT_CHANNEL_OTHER
+};
+
+enum BotPolicyDecision : uint8_t {
+  BOT_POLICY_IGNORE = 0,
+  BOT_POLICY_ALLOW_NORMAL,
+  BOT_POLICY_EMERGENCY_FORWARD
+};
+
+enum BotCommandId : uint8_t {
+  BOT_COMMAND_NONE = 0,
+  BOT_COMMAND_HELP,
+  BOT_COMMAND_PING,
+  BOT_COMMAND_TEST,
+  BOT_COMMAND_HELLO,
+  BOT_COMMAND_ABOUT,
+  BOT_COMMAND_DICE,
+  BOT_COMMAND_STATUS,
+  BOT_COMMAND_UNKNOWN
+};
+
+enum BotWriteResult : uint8_t {
+  BOT_WRITE_OK = 0,
+  BOT_WRITE_TRUNCATED,
+  BOT_WRITE_NO_SPACE
+};
+
+struct BotFingerprint {
+  uint64_t value;
+};
+
+struct BotMessage {
+  BotChannelKind channel_kind;
+  char channel_name[BOT_MAX_CHANNEL_NAME_LEN + 1];
+  char sender_name[BOT_MAX_SENDER_NAME_LEN + 1];
+  uint8_t sender_key_prefix[BOT_SENDER_KEY_PREFIX_LEN];
+  uint32_t sender_timestamp;
+  char text[BOT_MAX_TEXT_LEN + 1];
+  size_t text_len;
+};
+
+struct BotCommand {
+  BotCommandId id;
+  char name[BOT_MAX_COMMAND_NAME_LEN + 1];
+  char args[BOT_MAX_COMMAND_ARGS_LEN + 1];
+  size_t args_len;
+};
+
+struct BotResponse {
+  BotPolicyDecision decision;
+  BotFingerprint fingerprint;
+  char text[BOT_MAX_RESPONSE_LEN + 1];
+  size_t text_len;
+  bool truncated;
+};
+
+struct BotPrefs {
+  bool enabled;
+  uint16_t normal_delay_ms;
+  uint16_t normal_jitter_ms;
+  uint8_t max_response_parts;
+  char bot_channel[BOT_MAX_CHANNEL_NAME_LEN + 1];
+  char testing_channel[BOT_MAX_CHANNEL_NAME_LEN + 1];
+  char emergency_channel[BOT_MAX_CHANNEL_NAME_LEN + 1];
+  char public_channel[BOT_MAX_CHANNEL_NAME_LEN + 1];
+};
+
+struct BotStats {
+  uint32_t observed_messages;
+  uint32_t ignored_messages;
+  uint32_t eligible_messages;
+  uint32_t emergency_messages;
+  uint32_t parse_errors;
+};
+
+static_assert(sizeof(BotMessage) <= 240, "BotMessage RAM budget exceeded");
+static_assert(sizeof(BotCommand) <= 120, "BotCommand RAM budget exceeded");
+static_assert(sizeof(BotResponse) <= 184, "BotResponse RAM budget exceeded");
+static_assert(sizeof(BotPrefs) <= 128, "BotPrefs RAM budget exceeded");
+static_assert(sizeof(BotStats) <= 32, "BotStats RAM budget exceeded");
diff --git a/examples/companion_radio/FirmwareBot.cpp b/examples/companion_radio/FirmwareBot.cpp
new file mode 100644
index 00000000..c9447282
--- /dev/null
+++ b/examples/companion_radio/FirmwareBot.cpp
@@ -0,0 +1,193 @@
+#include "FirmwareBot.h"
+
+#include <ctype.h>
+#include <string.h>
+
+namespace {
+
+uint64_t fnv1aUpdate(uint64_t hash, uint8_t value) {
+  hash ^= value;
+  hash *= 1099511628211ULL;
+  return hash;
+}
+
+uint64_t fnv1aUpdateBytes(uint64_t hash, const uint8_t* data, size_t len) {
+  for (size_t i = 0; i < len; i++) {
+    hash = fnv1aUpdate(hash, data[i]);
+  }
+  return hash;
+}
+
+uint64_t fnv1aUpdateTextLower(uint64_t hash, const char* value, size_t len) {
+  for (size_t i = 0; i < len; i++) {
+    hash = fnv1aUpdate(hash, (uint8_t)tolower((unsigned char)value[i]));
+  }
+  return hash;
+}
+
+bool isSpaceByte(char ch) {
+  return ch == ' ' || ch == '\t' || ch == '\r' || ch == '\n';
+}
+
+bool isControlByte(char ch) {
+  unsigned char value = (unsigned char)ch;
+  return value < 0x20 || value == 0x7F;
+}
+
+bool namesEqual(const char* name, size_t len, const char* expected) {
+  size_t expected_len = strlen(expected);
+  if (len != expected_len) return false;
+  for (size_t i = 0; i < len; i++) {
+    if (tolower((unsigned char)name[i]) != expected[i]) return false;
+  }
+  return true;
+}
+
+bool isCommandDelimiter(char ch) {
+  return ch == ' ' || ch == ':' || ch == ',' || ch == '.' || ch == ';' || ch == '?' || ch == '!';
+}
+
+uint64_t fnv1aUpdateU32(uint64_t hash, uint32_t value) {
+  hash = fnv1aUpdate(hash, (uint8_t)(value & 0xFF));
+  hash = fnv1aUpdate(hash, (uint8_t)((value >> 8) & 0xFF));
+  hash = fnv1aUpdate(hash, (uint8_t)((value >> 16) & 0xFF));
+  hash = fnv1aUpdate(hash, (uint8_t)((value >> 24) & 0xFF));
+  return hash;
+}
+
+size_t boundedStrLen(const char* value, size_t max_len) {
+  size_t len = 0;
+  while (len < max_len && value[len] != 0) len++;
+  return len;
+}
+
+}
+
+namespace FirmwareBot {
+
+BotWriteResult normalizeText(const char* input, size_t input_len, char* output, size_t output_len, size_t* written) {
+  if (written) *written = 0;
+  if (!output || output_len == 0) return BOT_WRITE_NO_SPACE;
+
+  size_t out = 0;
+  bool pending_space = false;
+  bool truncated = false;
+
+  for (size_t i = 0; i < input_len; i++) {
+    char ch = input ? input[i] : 0;
+    if (ch == 0) break;
+
+    if (isSpaceByte(ch) || isControlByte(ch)) {
+      pending_space = out > 0;
+      continue;
+    }
+
+    if (pending_space) {
+      if (out + 1 >= output_len) {
+        truncated = true;
+        break;
+      }
+      output[out++] = ' ';
+      pending_space = false;
+    }
+
+    if (out + 1 >= output_len) {
+      truncated = true;
+      break;
+    }
+    output[out++] = ch;
+  }
+
+  output[out] = 0;
+  if (written) *written = out;
+  return truncated ? BOT_WRITE_TRUNCATED : BOT_WRITE_OK;
+}
+
+BotCommandId commandIdForName(const char* name, size_t len) {
+  if (namesEqual(name, len, "help") || namesEqual(name, len, "cmd") || namesEqual(name, len, "commands")) return BOT_COMMAND_HELP;
+  if (namesEqual(name, len, "ping")) return BOT_COMMAND_PING;
+  if (namesEqual(name, len, "test")) return BOT_COMMAND_TEST;
+  if (namesEqual(name, len, "hello") || namesEqual(name, len, "hi")) return BOT_COMMAND_HELLO;
+  if (namesEqual(name, len, "about")) return BOT_COMMAND_ABOUT;
+  if (namesEqual(name, len, "dice") || namesEqual(name, len, "roll")) return BOT_COMMAND_DICE;
+  if (namesEqual(name, len, "status")) return BOT_COMMAND_STATUS;
+  return BOT_COMMAND_UNKNOWN;
+}
+
+bool parseCommand(const char* text, size_t text_len, BotCommand* command) {
+  if (!command) return false;
+  memset(command, 0, sizeof(*command));
+  command->id = BOT_COMMAND_NONE;
+
+  char normalized[BOT_MAX_TEXT_LEN + 1];
+  size_t normalized_len = 0;
+  normalizeText(text, text_len, normalized, sizeof(normalized), &normalized_len);
+
+  if (normalized_len < 2 || (normalized[0] != '!' && normalized[0] != '/')) return false;
+
+  size_t pos = 1;
+  while (pos < normalized_len && normalized[pos] == ' ') pos++;
+  size_t name_start = pos;
+  while (pos < normalized_len && !isCommandDelimiter(normalized[pos])) pos++;
+  size_t name_len = pos - name_start;
+  if (name_len == 0) return false;
+
+  size_t copy_name_len = name_len;
+  if (copy_name_len > BOT_MAX_COMMAND_NAME_LEN) copy_name_len = BOT_MAX_COMMAND_NAME_LEN;
+  for (size_t i = 0; i < copy_name_len; i++) {
+    command->name[i] = (char)tolower((unsigned char)normalized[name_start + i]);
+  }
+  command->name[copy_name_len] = 0;
+  command->id = name_len > BOT_MAX_COMMAND_NAME_LEN ? BOT_COMMAND_UNKNOWN : commandIdForName(command->name, copy_name_len);
+
+  while (pos < normalized_len && isCommandDelimiter(normalized[pos])) pos++;
+  size_t args_len = normalized_len - pos;
+  if (args_len > BOT_MAX_COMMAND_ARGS_LEN) args_len = BOT_MAX_COMMAND_ARGS_LEN;
+  if (args_len > 0) memcpy(command->args, &normalized[pos], args_len);
+  command->args[args_len] = 0;
+  command->args_len = args_len;
+
+  return true;
+}
+
+BotWriteResult writeResponse(char* output, size_t output_len, const char* text, size_t text_len, size_t* written) {
+  if (written) *written = 0;
+  if (!output || output_len == 0) return BOT_WRITE_NO_SPACE;
+
+  if (!text && text_len > 0) {
+    output[0] = 0;
+    return BOT_WRITE_NO_SPACE;
+  }
+
+  size_t copy_len = text_len;
+  if (copy_len + 1 > output_len) copy_len = output_len - 1;
+  if (copy_len > 0) memcpy(output, text, copy_len);
+  output[copy_len] = 0;
+  if (written) *written = copy_len;
+
+  return copy_len < text_len ? BOT_WRITE_TRUNCATED : BOT_WRITE_OK;
+}
+
+BotFingerprint fingerprintFor(const BotMessage& message) {
+  uint64_t hash = 1469598103934665603ULL;
+  hash = fnv1aUpdate(hash, (uint8_t)message.channel_kind);
+  const char* channel_name = message.channel_name;
+  size_t channel_name_len = boundedStrLen(message.channel_name, sizeof(message.channel_name));
+  if (channel_name_len > 0 && channel_name[0] == '#') {
+    channel_name++;
+    channel_name_len--;
+  }
+  hash = fnv1aUpdateTextLower(hash, channel_name, channel_name_len);
+  hash = fnv1aUpdateBytes(hash, message.sender_key_prefix, sizeof(message.sender_key_prefix));
+  hash = fnv1aUpdateU32(hash, message.sender_timestamp);
+
+  char normalized[BOT_MAX_TEXT_LEN + 1];
+  size_t normalized_len = 0;
+  normalizeText(message.text, message.text_len, normalized, sizeof(normalized), &normalized_len);
+  hash = fnv1aUpdateTextLower(hash, normalized, normalized_len);
+
+  BotFingerprint fingerprint = { hash };
+  return fingerprint;
+}
+
+}
diff --git a/examples/companion_radio/FirmwareBot.h b/examples/companion_radio/FirmwareBot.h
new file mode 100644
index 00000000..8fce16ab
--- /dev/null
+++ b/examples/companion_radio/FirmwareBot.h
@@ -0,0 +1,13 @@
+#pragma once
+
+#include "BotTypes.h"
+
+namespace FirmwareBot {
+
+BotWriteResult normalizeText(const char* input, size_t input_len, char* output, size_t output_len, size_t* written);
+bool parseCommand(const char* text, size_t text_len, BotCommand* command);
+BotWriteResult writeResponse(char* output, size_t output_len, const char* text, size_t text_len, size_t* written);
+BotFingerprint fingerprintFor(const BotMessage& message);
+BotCommandId commandIdForName(const char* name, size_t len);
+
+}