feat: services (#2)
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291
examples/neopixel/NeoPixelService.cpp
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291
examples/neopixel/NeoPixelService.cpp
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#include "NeoPixelService.h"
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#include "ApiServer.h"
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// Wheel helper: map 0-255 to RGB rainbow
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static uint32_t colorWheel(Adafruit_NeoPixel& strip, uint8_t pos) {
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pos = 255 - pos;
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if (pos < 85) {
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return strip.Color(255 - pos * 3, 0, pos * 3);
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}
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if (pos < 170) {
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pos -= 85;
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return strip.Color(0, pos * 3, 255 - pos * 3);
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}
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pos -= 170;
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return strip.Color(pos * 3, 255 - pos * 3, 0);
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}
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NeoPixelService::NeoPixelService(TaskManager& taskMgr, uint16_t numPixels, uint8_t pin, neoPixelType type)
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: taskManager(taskMgr),
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strip(numPixels, pin, type),
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currentPattern(Pattern::Off),
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updateIntervalMs(20),
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lastUpdateMs(0),
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wipeIndex(0),
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wipeColor(strip.Color(255, 0, 0)),
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rainbowJ(0),
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cycleJ(0),
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chaseJ(0),
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chaseQ(0),
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chasePhaseOn(true),
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chaseColor(strip.Color(127, 127, 127)),
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brightness(50) {
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strip.begin();
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strip.setBrightness(brightness);
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strip.show();
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registerPatterns();
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registerTasks();
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}
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void NeoPixelService::registerEndpoints(ApiServer& api) {
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api.addEndpoint("/api/neopixel/status", HTTP_GET,
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[this](AsyncWebServerRequest* request) { handleStatusRequest(request); },
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std::vector<ParamSpec>{});
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api.addEndpoint("/api/neopixel/patterns", HTTP_GET,
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[this](AsyncWebServerRequest* request) { handlePatternsRequest(request); },
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std::vector<ParamSpec>{});
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api.addEndpoint("/api/neopixel", HTTP_POST,
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[this](AsyncWebServerRequest* request) { handleControlRequest(request); },
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std::vector<ParamSpec>{
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ParamSpec{String("pattern"), false, String("body"), String("string"), patternNamesVector()},
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ParamSpec{String("interval_ms"), false, String("body"), String("number"), {}, String("100")},
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ParamSpec{String("brightness"), false, String("body"), String("number"), {}, String("50")},
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ParamSpec{String("color"), false, String("body"), String("color"), {}},
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ParamSpec{String("color2"), false, String("body"), String("color"), {}},
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ParamSpec{String("r"), false, String("body"), String("number"), {}},
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ParamSpec{String("g"), false, String("body"), String("number"), {}},
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ParamSpec{String("b"), false, String("body"), String("number"), {}},
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ParamSpec{String("r2"), false, String("body"), String("number"), {}},
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ParamSpec{String("g2"), false, String("body"), String("number"), {}},
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ParamSpec{String("b2"), false, String("body"), String("number"), {}},
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ParamSpec{String("total_steps"), false, String("body"), String("number"), {}},
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ParamSpec{String("direction"), false, String("body"), String("string"), {String("forward"), String("reverse")}}
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});
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}
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void NeoPixelService::handleStatusRequest(AsyncWebServerRequest* request) {
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JsonDocument doc;
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doc["pin"] = strip.getPin();
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doc["count"] = strip.numPixels();
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doc["interval_ms"] = updateIntervalMs;
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doc["brightness"] = brightness;
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doc["pattern"] = currentPatternName();
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String json;
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serializeJson(doc, json);
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request->send(200, "application/json", json);
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}
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void NeoPixelService::handlePatternsRequest(AsyncWebServerRequest* request) {
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JsonDocument doc;
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JsonArray arr = doc.to<JsonArray>();
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for (auto& kv : patternUpdaters) arr.add(kv.first);
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String json;
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serializeJson(doc, json);
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request->send(200, "application/json", json);
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}
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void NeoPixelService::handleControlRequest(AsyncWebServerRequest* request) {
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if (request->hasParam("pattern", true)) {
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String name = request->getParam("pattern", true)->value();
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setPatternByName(name);
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}
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if (request->hasParam("interval_ms", true)) {
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unsigned long v = request->getParam("interval_ms", true)->value().toInt();
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if (v < 1) v = 1;
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updateIntervalMs = v;
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taskManager.setTaskInterval("neopixel_update", updateIntervalMs);
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}
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if (request->hasParam("brightness", true)) {
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int b = request->getParam("brightness", true)->value().toInt();
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if (b < 0) b = 0; if (b > 255) b = 255;
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setBrightness((uint8_t)b);
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}
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// Accept packed color ints or r,g,b triplets
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if (request->hasParam("color", true)) {
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wipeColor = (uint32_t)strtoul(request->getParam("color", true)->value().c_str(), nullptr, 0);
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chaseColor = wipeColor;
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}
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if (request->hasParam("r", true) || request->hasParam("g", true) || request->hasParam("b", true)) {
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int r = request->hasParam("r", true) ? request->getParam("r", true)->value().toInt() : 0;
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int g = request->hasParam("g", true) ? request->getParam("g", true)->value().toInt() : 0;
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int b = request->hasParam("b", true) ? request->getParam("b", true)->value().toInt() : 0;
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wipeColor = strip.Color(r, g, b);
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chaseColor = strip.Color(r / 2, g / 2, b / 2); // dimmer for chase
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}
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JsonDocument resp;
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resp["ok"] = true;
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resp["pattern"] = currentPatternName();
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resp["interval_ms"] = updateIntervalMs;
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resp["brightness"] = brightness;
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String json;
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serializeJson(resp, json);
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request->send(200, "application/json", json);
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}
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void NeoPixelService::setBrightness(uint8_t b) {
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brightness = b;
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strip.setBrightness(brightness);
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strip.show();
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}
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void NeoPixelService::registerTasks() {
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taskManager.registerTask("neopixel_update", updateIntervalMs, [this]() { update(); });
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taskManager.registerTask("neopixel_status_print", 10000, [this]() {
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Serial.printf("[NeoPixel] pattern=%s interval=%lu ms brightness=%u\n",
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currentPatternName().c_str(), updateIntervalMs, brightness);
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});
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}
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void NeoPixelService::registerPatterns() {
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patternUpdaters["off"] = [this]() { updateOff(); };
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patternUpdaters["color_wipe"] = [this]() { updateColorWipe(); };
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patternUpdaters["rainbow"] = [this]() { updateRainbow(); };
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patternUpdaters["rainbow_cycle"] = [this]() { updateRainbowCycle(); };
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patternUpdaters["theater_chase"] = [this]() { updateTheaterChase(); };
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patternUpdaters["theater_chase_rainbow"] = [this]() { updateTheaterChaseRainbow(); };
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}
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std::vector<String> NeoPixelService::patternNamesVector() const {
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std::vector<String> v;
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v.reserve(patternUpdaters.size());
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for (const auto& kv : patternUpdaters) v.push_back(kv.first);
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return v;
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}
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String NeoPixelService::currentPatternName() const {
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switch (currentPattern) {
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case Pattern::Off: return String("off");
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case Pattern::ColorWipe: return String("color_wipe");
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case Pattern::Rainbow: return String("rainbow");
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case Pattern::RainbowCycle: return String("rainbow_cycle");
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case Pattern::TheaterChase: return String("theater_chase");
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case Pattern::TheaterChaseRainbow: return String("theater_chase_rainbow");
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}
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return String("off");
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}
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NeoPixelService::Pattern NeoPixelService::nameToPattern(const String& name) const {
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if (name.equalsIgnoreCase("color_wipe")) return Pattern::ColorWipe;
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if (name.equalsIgnoreCase("rainbow")) return Pattern::Rainbow;
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if (name.equalsIgnoreCase("rainbow_cycle")) return Pattern::RainbowCycle;
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if (name.equalsIgnoreCase("theater_chase")) return Pattern::TheaterChase;
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if (name.equalsIgnoreCase("theater_chase_rainbow")) return Pattern::TheaterChaseRainbow;
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return Pattern::Off;
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}
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void NeoPixelService::setPatternByName(const String& name) {
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Pattern p = nameToPattern(name);
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resetStateForPattern(p);
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}
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void NeoPixelService::resetStateForPattern(Pattern p) {
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strip.clear();
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strip.show();
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wipeIndex = 0;
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rainbowJ = 0;
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cycleJ = 0;
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chaseJ = 0;
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chaseQ = 0;
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chasePhaseOn = true;
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lastUpdateMs = 0;
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currentPattern = p;
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}
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void NeoPixelService::update() {
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unsigned long now = millis();
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if (now - lastUpdateMs < updateIntervalMs) return;
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lastUpdateMs = now;
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const String name = currentPatternName();
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auto it = patternUpdaters.find(name);
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if (it != patternUpdaters.end()) {
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it->second();
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} else {
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updateOff();
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}
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}
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void NeoPixelService::updateOff() {
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strip.clear();
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strip.show();
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}
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void NeoPixelService::updateColorWipe() {
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if (wipeIndex < strip.numPixels()) {
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strip.setPixelColor(wipeIndex, wipeColor);
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++wipeIndex;
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strip.show();
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} else {
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strip.clear();
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wipeIndex = 0;
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}
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}
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void NeoPixelService::updateRainbow() {
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for (uint16_t i = 0; i < strip.numPixels(); i++) {
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strip.setPixelColor(i, colorWheel(strip, (i + rainbowJ) & 255));
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}
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strip.show();
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rainbowJ = (rainbowJ + 1) & 0xFF;
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}
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void NeoPixelService::updateRainbowCycle() {
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for (uint16_t i = 0; i < strip.numPixels(); i++) {
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uint8_t pos = ((i * 256 / strip.numPixels()) + cycleJ) & 0xFF;
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strip.setPixelColor(i, colorWheel(strip, pos));
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}
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strip.show();
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cycleJ = (cycleJ + 1) & 0xFF;
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}
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void NeoPixelService::updateTheaterChase() {
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if (chasePhaseOn) {
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for (uint16_t i = 0; i < strip.numPixels(); i += 3) {
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uint16_t idx = i + chaseQ;
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if (idx < strip.numPixels()) strip.setPixelColor(idx, chaseColor);
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}
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strip.show();
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chasePhaseOn = false;
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} else {
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for (uint16_t i = 0; i < strip.numPixels(); i += 3) {
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uint16_t idx = i + chaseQ;
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if (idx < strip.numPixels()) strip.setPixelColor(idx, 0);
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}
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strip.show();
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chasePhaseOn = true;
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chaseQ = (chaseQ + 1) % 3;
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chaseJ = (chaseJ + 1) % 10;
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}
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}
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void NeoPixelService::updateTheaterChaseRainbow() {
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if (chasePhaseOn) {
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for (uint16_t i = 0; i < strip.numPixels(); i += 3) {
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uint16_t idx = i + chaseQ;
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if (idx < strip.numPixels()) strip.setPixelColor(idx, colorWheel(strip, (idx + chaseJ) % 255));
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}
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strip.show();
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chasePhaseOn = false;
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} else {
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for (uint16_t i = 0; i < strip.numPixels(); i += 3) {
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uint16_t idx = i + chaseQ;
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if (idx < strip.numPixels()) strip.setPixelColor(idx, 0);
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}
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strip.show();
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chasePhaseOn = true;
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chaseQ = (chaseQ + 1) % 3;
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chaseJ = (chaseJ + 1) & 0xFF;
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}
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}
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