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ESPUI/src/ESPUI.cpp

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#include "ESPUI.h"
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#include <ESPAsyncWebServer.h>
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#include <functional>
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// Handle Websockets Communication
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void onWsEvent(AsyncWebSocket *server, AsyncWebSocketClient *client,
AwsEventType type, void *arg, uint8_t *data, size_t len) {
switch (type) {
case WS_EVT_DISCONNECT:
if(debug) Serial.printf("Disconnected!\n");
break;
case WS_EVT_CONNECT: {
if(debug) Serial.println("Connected");
ESPUI.jsonDom(client);
if(debug) Serial.println("JSON Data Sent to Client!");
} break;
case WS_EVT_DATA:
String msg = "";
for (size_t i = 0; i < len; i++) {
msg += (char)data[i];
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}
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if (msg.startsWith("bdown:")) {
Control* c = ESPUI.controls[msg.substring(6).toInt()];
c->callback(c, B_DOWN);
} else if (msg.startsWith("bup:")) {
Control* c = ESPUI.controls[msg.substring(4).toInt()];
c->callback(c, B_UP);
} else if (msg.startsWith("pfdown:")) {
Control* c = ESPUI.controls[msg.substring(7).toInt()];
c->callback(c, P_FOR_DOWN);
} else if (msg.startsWith("pfup:")) {
Control* c = ESPUI.controls[msg.substring(5).toInt()];
c->callback(c, P_FOR_UP);
} else if (msg.startsWith("pldown:")) {
Control* c = ESPUI.controls[msg.substring(7).toInt()];
c->callback(c, P_LEFT_DOWN);
} else if (msg.startsWith("plup:")) {
Control* c = ESPUI.controls[msg.substring(5).toInt()];
c->callback(c, P_LEFT_UP);
} else if (msg.startsWith("prdown:")) {
Control* c = ESPUI.controls[msg.substring(7).toInt()];
c->callback(c, P_RIGHT_DOWN);
} else if (msg.startsWith("prup:")) {
Control* c = ESPUI.controls[msg.substring(5).toInt()];
c->callback(c, P_RIGHT_UP);
} else if (msg.startsWith("pbdown:")) {
Control* c = ESPUI.controls[msg.substring(7).toInt()];
c->callback(c, P_BACK_DOWN);
} else if (msg.startsWith("pbup:")) {
Control* c = ESPUI.controls[msg.substring(5).toInt()];
c->callback(c, P_BACK_UP);
} else if (msg.startsWith("pcdown:")) {
Control* c = ESPUI.controls[msg.substring(7).toInt()];
c->callback(c, P_CENTER_DOWN);
} else if (msg.startsWith("pcup:")) {
Control* c = ESPUI.controls[msg.substring(5).toInt()];
c->callback(c, P_CENTER_UP);
} else if (msg.startsWith("sactive:")) {
Control* c = ESPUI.controls[msg.substring(8).toInt()];
ESPUI.updateSwitcher(c->id, true);
c->callback(c, S_ACTIVE);
} else if (msg.startsWith("sinactive:")) {
Control* c = ESPUI.controls[msg.substring(10).toInt()];
ESPUI.updateSwitcher(c->id, false);
c->callback(c, S_INACTIVE);
}
break;
}
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}
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void ESPUIClass::label(const char *label, String value) {
if (labelExists(label)) {
if (debug) Serial.println("UI ERROR: Element " + String(label) + " exists, skipping creating element!");
return;
}
Control *newL = new Control();
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newL->type = UI_LABEL;
newL->label = label;
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if (value != "")
newL->value = value; // Init with labeltext
else
newL->value = String(label);
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newL->callback = NULL;
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newL->id = cIndex;
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controls[cIndex] = newL;
cIndex++;
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}
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void ESPUIClass::button(const char *label, void (*callBack)(Control*, int), String value) {
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if (labelExists(label)) {
if (debug) Serial.println("UI ERROR: Element " + String(label) + " exists, skipping creating element!");
return;
}
Control *newB = new Control();
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newB->type = UI_BUTTON;
newB->label = label;
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if (value != "")
newB->value = value; // Init with labeltext
else
newB->value = String(label);
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newB->callback = callBack;
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newB->id = cIndex;
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controls[cIndex] = newB;
cIndex++;
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}
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void ESPUIClass::switcher(const char *label, bool startState, void (*callBack)(Control*, int)) {
if (labelExists(label)) {
if (debug) Serial.println("UI ERROR: Element " + String(label) + " exists, skipping creating element!");
return;
}
Control *newS = new Control();
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newS->type = UI_SWITCHER;
newS->label = label;
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newS->value = String(startState);
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newS->callback = callBack;
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newS->id = cIndex;
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controls[cIndex] = newS;
cIndex++;
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}
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void ESPUIClass::pad(const char *label, bool center, void (*callBack)(Control*, int)) {
if (labelExists(label)) {
if (debug) Serial.println("UI ERROR: Element " + String(label) + " exists, skipping creating element!");
return;
}
Control *newP = new Control();
if (center)
newP->type = UI_CPAD;
else
newP->type = UI_PAD;
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newP->label = label;
newP->callback = callBack;
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newP->id = cIndex;
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controls[cIndex] = newP;
cIndex++;
}
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void ESPUIClass::print(int id, String value) {
if (id < cIndex && controls[id]->type == UI_LABEL) {
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controls[id]->value = value;
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String json;
StaticJsonBuffer<200> jsonBuffer;
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JsonObject &root = jsonBuffer.createObject();
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root["type"] = UPDATE_LABEL;
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root["value"] = value;
root["id"] = String(id);
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root.printTo(json);
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this->ws->textAll(json);
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} else {
if(debug) Serial.println(String("Error: ") + String(id) + String(" is no label"));
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}
}
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void ESPUIClass::print(String label, String value) {
if (!labelExists(label)) {
if (debug) Serial.println("UI ERROR: Element does not " + String(label) + " exist, cannot update!");
return;
}
print(getIdByLabel(label), value);
}
void ESPUIClass::updateSwitcher(int id, bool nValue) {
if (id < cIndex && controls[id]->type == UI_SWITCHER) {
controls[id]->value = nValue ? 1 : 0;
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String json;
StaticJsonBuffer<200> jsonBuffer;
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JsonObject &root = jsonBuffer.createObject();
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root["type"] = UPDATE_SWITCH;
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root["value"] = nValue ? 1 : 0;
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root["id"] = String(id);
root.printTo(json);
this->ws->textAll(json);
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} else {
if(debug) Serial.println(String("Error: ") + String(id) + String(" is no switcher"));
}
}
void ESPUIClass::updateSwitcher(String label, bool nValue) {
if (!labelExists(label)) {
if (debug)
Serial.println("UI ERROR: Element does not " + String(label) + " exist, cannot update!");
return;
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}
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updateSwitcher(getIdByLabel(label), nValue);
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}
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int ESPUIClass::getIdByLabel(String label) {
for (int i = 0; i < cIndex; i++) {
if (String(controls[i]->label) == label)
return i;
}
return -1; // failed, nonexistant
}
bool ESPUIClass::labelExists(String label) {
for (int i = 0; i < cIndex; i++) {
if (String(controls[i]->label) == label) return true;
}
return false;
}
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// Convert & Transfer Arduino elements to JSON elements
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void ESPUIClass::jsonDom(AsyncWebSocketClient *client) {
for (int i = -1; i < cIndex; i++) {
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String json;
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StaticJsonBuffer<200> jsonBuffer;
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JsonObject &root = jsonBuffer.createObject();
if (i == -1) {
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root["type"] = UI_TITEL;
root["label"] = String(ui_title);
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} else {
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root["type"] = controls[i]->type;
root["label"] = String(controls[i]->label);
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root["value"] = String(controls[i]->value);
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root["id"] = String(i);
}
root.printTo(json);
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client->text(json);
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}
}
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void ESPUIClass::begin(const char *_title) {
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ui_title = _title;
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server = new AsyncWebServer(80);
ws = new AsyncWebSocket("/ws");
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SPIFFS.begin();
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ws->onEvent(onWsEvent);
server->addHandler(ws);
server->serveStatic("/", SPIFFS, "/").setDefaultFile("index.htm");
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// Heap for general Servertest
server->on("/heap", HTTP_GET, [](AsyncWebServerRequest *request) {
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request->send(200, "text/plain", String(ESP.getFreeHeap()));
});
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server->onNotFound(
[](AsyncWebServerRequest *request) { request->send(404); });
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server->begin();
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if(debug) Serial.println("UI Initialized");
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}
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ESPUIClass ESPUI;