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530 lines
14 KiB
530 lines
14 KiB
/*
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SETTINGS MODULE
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Copyright (C) 2016-2019 by Xose Pérez <xose dot perez at gmail dot com>
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*/
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#include "espurna.h"
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#include "crash.h"
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#include "terminal.h"
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#include "storage_eeprom.h"
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#include <algorithm>
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#include <vector>
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#include <cstdlib>
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#include <ArduinoJson.h>
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BrokerBind(ConfigBroker);
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// -----------------------------------------------------------------------------
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namespace settings {
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// Depending on features enabled, we may end up with different left boundary
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// Settings are written right-to-left, so we only have issues when there are a lot of key-values
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// XXX: slightly hacky, because we EEPROMr.length() is 0 before we enter setup() code
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kvs_type kv_store(
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EepromStorage{},
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#if DEBUG_SUPPORT
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EepromReservedSize + CrashReservedSize,
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#else
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EepromReservedSize,
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#endif
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EepromSize
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);
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} // namespace settings
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size_t settingsSize() {
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return settings::kv_store.size() - settings::kv_store.available();
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}
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// --------------------------------------------------------------------------
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namespace settings {
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namespace internal {
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uint32_t u32fromString(const String& string, int base) {
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const char *ptr = string.c_str();
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char *value_endptr = nullptr;
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// invalidate the whole string when invalid chars are detected
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const auto value = strtoul(ptr, &value_endptr, base);
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if (value_endptr == ptr || value_endptr[0] != '\0') {
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return 0;
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}
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return value;
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}
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// --------------------------------------------------------------------------
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template <>
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float convert(const String& value) {
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return atof(value.c_str());
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}
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template <>
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double convert(const String& value) {
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return atof(value.c_str());
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}
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template <>
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int convert(const String& value) {
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return value.toInt();
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}
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template <>
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long convert(const String& value) {
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return value.toInt();
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}
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template <>
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bool convert(const String& value) {
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if (value.length()) {
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if ((value == "0")
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|| (value == "n")
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|| (value == "no")
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|| (value == "false")
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|| (value == "off")) {
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return false;
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}
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return (value == "1")
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|| (value == "y")
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|| (value == "yes")
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|| (value == "true")
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|| (value == "on");
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}
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return false;
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}
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template <>
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unsigned long convert(const String& value) {
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if (!value.length()) {
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return 0;
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}
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int base = 10;
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if (value.length() > 2) {
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if (value.startsWith("0b")) {
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base = 2;
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} else if (value.startsWith("0o")) {
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base = 8;
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} else if (value.startsWith("0x")) {
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base = 16;
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}
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}
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return u32fromString((base == 10) ? value : value.substring(2), base);
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}
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template <>
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unsigned int convert(const String& value) {
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return convert<unsigned long>(value);
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}
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template <>
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unsigned short convert(const String& value) {
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return convert<unsigned long>(value);
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}
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template <>
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unsigned char convert(const String& value) {
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return convert<unsigned long>(value);
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}
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} // namespace settings::internal
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} // namespace settings
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// -----------------------------------------------------------------------------
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/*
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struct SettingsKeys {
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struct iterator {
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iterator(size_t total) :
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total(total)
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{}
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iterator& operator++() {
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if (total && (current_index < (total - 1))) {
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++current_index
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current_value = settingsKeyName(current_index);
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return *this;
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}
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return end();
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}
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iterator operator++(int) {
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iterator val = *this;
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++(*this);
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return val;
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}
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operator String() {
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return (current_index < total) ? current_value : empty_value;
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}
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bool operator ==(iterator& const other) const {
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return (total == other.total) && (current_index == other.current_index);
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}
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bool operator !=(iterator& const other) const {
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return !(*this == other);
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}
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using difference_type = size_t;
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using value_type = size_t;
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using pointer = const size_t*;
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using reference = const size_t&;
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using iterator_category = std::forward_iterator_tag;
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const size_t total;
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String empty_value;
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String current_value;
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size_t current_index = 0;
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};
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iterator begin() {
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return iterator {total};
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}
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iterator end() {
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return iterator {0};
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}
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};
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*/
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// Note: we prefer things sorted via this function, not kv_store.keys() directly
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std::vector<String> settingsKeys() {
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auto keys = settings::kv_store.keys();
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std::sort(keys.begin(), keys.end(), [](const String& rhs, const String& lhs) -> bool {
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return lhs.compareTo(rhs) > 0;
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});
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return keys;
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}
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static std::vector<settings_key_match_t> _settings_matchers;
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void settingsRegisterDefaults(const settings_key_match_t& matcher) {
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_settings_matchers.push_back(matcher);
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}
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String settingsQueryDefaults(const String& key) {
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for (auto& matcher : _settings_matchers) {
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if (matcher.match(key.c_str())) {
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return matcher.key(key);
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}
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}
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return String();
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}
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// -----------------------------------------------------------------------------
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// Key-value API
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// -----------------------------------------------------------------------------
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String settings_key_t::toString() const {
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if (_index < 0) {
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return _value;
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} else {
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return _value + _index;
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}
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}
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settings_move_key_t _moveKeys(const String& from, const String& to, unsigned char index) {
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return settings_move_key_t {{from, index}, {to, index}};
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}
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void moveSetting(const String& from, const String& to) {
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const auto value = getSetting(from);
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if (value.length() > 0) setSetting(to, value);
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delSetting(from);
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}
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void moveSetting(const String& from, const String& to, unsigned char index) {
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const auto keys = _moveKeys(from, to, index);
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const auto value = getSetting(keys.first);
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if (value.length() > 0) setSetting(keys.second, value);
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delSetting(keys.first);
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}
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void moveSettings(const String& from, const String& to) {
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unsigned char index = 0;
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while (index < 100) {
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const auto keys = _moveKeys(from, to, index);
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const auto value = getSetting(keys.first);
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if (value.length() == 0) break;
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setSetting(keys.second, value);
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delSetting(keys.first);
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++index;
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}
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}
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template<>
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String getSetting(const settings_key_t& key, String defaultValue) {
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auto result = settings::kv_store.get(key.toString());
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if (!result) {
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return defaultValue;
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}
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return result.value;
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}
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template
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bool getSetting(const settings_key_t& key, bool defaultValue);
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template
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int getSetting(const settings_key_t& key, int defaultValue);
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template
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long getSetting(const settings_key_t& key, long defaultValue);
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template
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unsigned char getSetting(const settings_key_t& key, unsigned char defaultValue);
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template
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unsigned short getSetting(const settings_key_t& key, unsigned short defaultValue);
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template
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unsigned int getSetting(const settings_key_t& key, unsigned int defaultValue);
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template
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unsigned long getSetting(const settings_key_t& key, unsigned long defaultValue);
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template
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float getSetting(const settings_key_t& key, float defaultValue);
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template
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double getSetting(const settings_key_t& key, double defaultValue);
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String getSetting(const settings_key_t& key) {
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static const String defaultValue("");
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return getSetting(key, defaultValue);
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}
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String getSetting(const settings_key_t& key, const char* defaultValue) {
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return getSetting(key, String(defaultValue));
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}
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String getSetting(const settings_key_t& key, const __FlashStringHelper* defaultValue) {
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return getSetting(key, String(defaultValue));
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}
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template<>
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bool setSetting(const settings_key_t& key, const String& value) {
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return settings::kv_store.set(key.toString(), value);
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}
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bool delSetting(const settings_key_t& key) {
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return settings::kv_store.del(key.toString());
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}
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bool hasSetting(const settings_key_t& key) {
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return settings::kv_store.has(key.toString());
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}
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void saveSettings() {
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#if not SETTINGS_AUTOSAVE
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eepromCommit();
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#endif
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}
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void resetSettings() {
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auto* ptr = EEPROMr.getDataPtr();
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std::fill(ptr + EepromReservedSize, ptr + EepromSize, 0xFF);
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EEPROMr.commit();
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}
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// -----------------------------------------------------------------------------
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// API
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// -----------------------------------------------------------------------------
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bool settingsRestoreJson(JsonObject& data) {
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// Note: we try to match what /config generates, expect {"app":"ESPURNA",...}
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const char* app = data["app"];
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if (!app || strcmp(app, APP_NAME) != 0) {
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DEBUG_MSG_P(PSTR("[SETTING] Wrong or missing 'app' key\n"));
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return false;
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}
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// .../config will add this key, but it is optional
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if (data["backup"].as<bool>()) {
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resetSettings();
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}
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// These three are just metadata, no need to actually store them
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for (auto element : data) {
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if (strcmp(element.key, "app") == 0) continue;
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if (strcmp(element.key, "version") == 0) continue;
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if (strcmp(element.key, "backup") == 0) continue;
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setSetting(element.key, element.value.as<char*>());
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}
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saveSettings();
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DEBUG_MSG_P(PSTR("[SETTINGS] Settings restored successfully\n"));
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return true;
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}
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bool settingsRestoreJson(char* json_string, size_t json_buffer_size) {
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// XXX: as of right now, arduinojson cannot trigger callbacks for each key individually
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// Manually separating kv pairs can allow to parse only a small chunk, since we know that there is only string type used (even with bools / ints). Can be problematic when parsing data that was not generated by us.
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// Current parsing method is limited only by keys (~sizeof(uintptr_t) bytes per key, data is not copied when string is non-const)
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DynamicJsonBuffer jsonBuffer(json_buffer_size);
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JsonObject& root = jsonBuffer.parseObject((char *) json_string);
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if (!root.success()) {
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DEBUG_MSG_P(PSTR("[SETTINGS] JSON parsing error\n"));
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return false;
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}
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return settingsRestoreJson(root);
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}
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void settingsGetJson(JsonObject& root) {
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// Get sorted list of keys
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auto keys = settingsKeys();
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// Add the key-values to the json object
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for (unsigned int i=0; i<keys.size(); i++) {
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String value = getSetting(keys[i]);
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root[keys[i]] = value;
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}
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}
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void settingsProcessConfig(const settings_cfg_list_t& config, settings_filter_t filter) {
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for (auto& entry : config) {
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String value = getSetting(entry.key, entry.default_value);
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if (filter) {
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value = filter(value);
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}
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if (value.equals(entry.setting)) continue;
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entry.setting = std::move(value);
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}
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}
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// -----------------------------------------------------------------------------
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// Initialization
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// -----------------------------------------------------------------------------
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void settingsSetup() {
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terminalRegisterCommand(F("CONFIG"), [](const terminal::CommandContext& ctx) {
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// TODO: enough of a buffer?
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DynamicJsonBuffer jsonBuffer(1024);
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JsonObject& root = jsonBuffer.createObject();
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settingsGetJson(root);
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root.prettyPrintTo(ctx.output);
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terminalOK(ctx);
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});
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terminalRegisterCommand(F("KEYS"), [](const terminal::CommandContext& ctx) {
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auto keys = settingsKeys();
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ctx.output.println(F("Current settings:"));
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for (unsigned int i=0; i<keys.size(); i++) {
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const auto value = getSetting(keys[i]);
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ctx.output.printf("> %s => \"%s\"\n", (keys[i]).c_str(), value.c_str());
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}
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auto available [[gnu::unused]] = settings::kv_store.available();
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ctx.output.printf("Number of keys: %u\n", keys.size());
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ctx.output.printf("Available: %u bytes (%u%%)\n", available, (100 * available) / settings::kv_store.size());
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terminalOK(ctx);
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});
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terminalRegisterCommand(F("DEL"), [](const terminal::CommandContext& ctx) {
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if (ctx.argc != 2) {
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terminalError(ctx, F("del <key> [<key>...]"));
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return;
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}
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int result = 0;
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for (auto it = (ctx.argv.begin() + 1); it != ctx.argv.end(); ++it) {
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result += settings::kv_store.del(*it);
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}
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if (result) {
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terminalOK(ctx);
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} else {
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terminalError(ctx, F("no keys were removed"));
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}
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});
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terminalRegisterCommand(F("SET"), [](const terminal::CommandContext& ctx) {
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if (ctx.argc != 3) {
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terminalError(ctx, F("set <key> <value>"));
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return;
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}
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if (settings::kv_store.set(ctx.argv[1], ctx.argv[2])) {
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terminalOK(ctx);
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return;
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}
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terminalError(ctx, F("could not set the key"));
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});
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terminalRegisterCommand(F("GET"), [](const terminal::CommandContext& ctx) {
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if (ctx.argc < 2) {
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terminalError(ctx, F("Wrong arguments"));
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return;
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}
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for (auto it = (ctx.argv.begin() + 1); it != ctx.argv.end(); ++it) {
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const String& key = *it;
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auto result = settings::kv_store.get(key);
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if (!result) {
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const auto maybeDefault = settingsQueryDefaults(key);
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if (maybeDefault.length()) {
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ctx.output.printf("> %s => %s (default)\n", key.c_str(), maybeDefault.c_str());
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} else {
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ctx.output.printf("> %s =>\n", key.c_str());
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}
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continue;
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}
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ctx.output.printf("> %s => \"%s\"\n", key.c_str(), result.value.c_str());
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}
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terminalOK(ctx);
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});
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terminalRegisterCommand(F("RELOAD"), [](const terminal::CommandContext&) {
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espurnaReload();
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terminalOK();
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});
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terminalRegisterCommand(F("FACTORY.RESET"), [](const terminal::CommandContext&) {
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resetSettings();
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terminalOK();
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});
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#if not SETTINGS_AUTOSAVE
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terminalRegisterCommand(F("SAVE"), [](const terminal::CommandContext&) {
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eepromCommit();
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terminalOK();
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});
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#endif
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}
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