micheleandCursor
ddbee70c23
Implement ESP-IDF walking skeleton with SoftAP, health API, and host tests, then Slice 2 ISecureStore/NvsSecureStore, STA join, POST /api/wifi, and the provisioning web UI. Co-authored-by: Cursor <cursoragent@cursor.com>
94 lines
2.8 KiB
C++
94 lines
2.8 KiB
C++
/**
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* @file WifiProvisionJson.cpp
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* @brief Wi-Fi provisioning JSON parse/serialise implementation.
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*
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* DigiRadio firmware — https://github.com/manvalan/DigiRadio
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*
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* Copyright 2026 Michele Bigi
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* @author Michele Bigi
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* @date 2026-07-06
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*/
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#include "core/WifiProvisionJson.hpp"
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namespace core {
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namespace {
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/**
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* @brief extractJsonString — read a quoted string value for a key.
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*
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* @dname extractJsonString
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* @param json Full JSON object text.
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* @param key Field name without quotes (e.g. ssid).
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* @return Decoded string view into json, or empty on failure.
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* @pubstate none
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*
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* @author Michele Bigi
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* @date 2026-07-06
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*/
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[[nodiscard]] std::string_view extractJsonString(std::string_view json,
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std::string_view key)
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{
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const std::string needle = std::string("\"") + std::string(key) + "\":\"";
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const std::size_t start = json.find(needle);
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if (start == std::string_view::npos) {
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return {};
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}
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const std::size_t valueStart = start + needle.size();
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const std::size_t valueEnd = json.find('"', valueStart);
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if (valueEnd == std::string_view::npos) {
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return {};
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}
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return json.substr(valueStart, valueEnd - valueStart);
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}
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} // namespace
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std::expected<WifiCredentials, ParseError>
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parseWifiProvisionJson(std::string_view json)
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{
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if (json.find('{') == std::string_view::npos) {
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return std::unexpected(ParseError::InvalidJson);
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}
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const std::string_view ssidRaw = extractJsonString(json, "ssid");
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if (ssidRaw.empty() && json.find("\"ssid\"") == std::string_view::npos) {
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return std::unexpected(ParseError::MissingField);
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}
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if (!WifiSsid::isValid(ssidRaw)) {
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return std::unexpected(ParseError::InvalidSsid);
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}
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std::string_view passwordRaw;
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if (json.find("\"password\"") != std::string_view::npos) {
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passwordRaw = extractJsonString(json, "password");
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}
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if (!WifiCredentials::isPasswordValid(passwordRaw)) {
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return std::unexpected(ParseError::InvalidPassword);
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}
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return WifiCredentials(WifiSsid(ssidRaw), Secret(std::string(passwordRaw)));
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}
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std::string serializeWifiProvisionSavedJson(unsigned rebootInSec)
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{
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return std::string("{\"status\":\"saved\",\"reboot_in_sec\":")
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+ std::to_string(rebootInSec) + "}";
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}
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std::string serializeWifiProvisionErrorJson(std::string_view reason)
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{
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return std::string("{\"status\":\"error\",\"reason\":\"") + std::string(reason)
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+ "\"}";
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}
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} // namespace core
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