rest.cpp

#include "rest.hpp"
#include "mpod.hpp"
#include "panel.hpp"
#include "pins.hpp"
#include <ETH.h>

#ifndef ICBM_GIT_VERSION
#define ICBM_GIT_VERSION "DEVEL"
#endif

#ifndef ICBM_GIT_TIMESTAMP
#define ICBM_GIT_TIMESTAMP "UNKNOWN"
#endif

WebServer restServer(80);

void initializeRoutes() {
    restServer.on("/idn", identify);
    restServer.on("/restart", restart);
    restServer.onNotFound(notFound);
    restServer.on("/send", sendSNMP);
    restServer.on("/", panel);
    restServer.on("/poll", pollMPODChannel);

    restServer.begin();
    Serial.println("REST Server Started");
}


void identify() {
    int seconds = millis() / 1000;
    int hours = seconds / 3600;
    int minutes = (seconds / 60) % 60;
    seconds = seconds % 60;

    String message = "{\n";

    message += "\"mac\":\"";
    message += ETH.macAddress();
    message += "\",\n";

    message += "\"version\":\"";
    message += ICBM_GIT_VERSION;
    message += "\",\n";

    message += "\"build date\":\"";
    message += ICBM_GIT_TIMESTAMP;
    message += "\",\n";

    message += "\"uptime\": \"";
    message += hours;
    message += ":";
    message += minutes;
    message += ":";
    message += seconds;
    message += "\",\n";

    message += "\"inputs\":{\n";
    message += "\"sib\":";
    message += PINS.sib;
    message += ",\n";

    message += "\"plc\":";
    message += PINS.plc;
    message += ",\n";

    message += "\"ups\":";
    message += PINS.ups;
    message += ",\n";

    unsigned long elapsed_seconds = (millis() - PINS.last_triggered) / 1000;
    message += "\"sec_since_interrupt\":";
    message += elapsed_seconds;
    message += ",\n";
    message += "\n}";

    // TODO: Add here power sequence status
    // is_ramping_down
    // current step
    // percentage

    message += "\n}";

    restServer.send(200, "text/json", message);
}

void panel() {
    unsigned long elapsed_seconds = (millis() - PINS.last_triggered) / 1000;
    String content = buildPanel(
        PINS.sib,
        PINS.plc,
        PINS.ups,
        elapsed_seconds
    );
    restServer.send(200, "text/html", content);
}

void notFound() {
    String message = "{\n";
    message += "\"uri\":\"";
    message += restServer.uri();
    message += "\",\n\"method\":\"";
    message += (restServer.method() == HTTP_GET) ? "GET" : "POST";

    message += "\",\n\"arguments\":{";
    for (uint8_t i = 0; i < restServer.args(); i++) {
        message += "\n\"" + restServer.argName(i) + "\":\"" + restServer.arg(i) + "\",";
    }
	if (restServer.args() != 0) {
		message.remove(message.length()-1);  // remove trailing comma for valid json
	}

	message += "\n}\n}";
    restServer.send(404, "text/json", message);
	Serial.println(message);
}

void restart() {
	restServer.send(200);
	ESP.restart();
}


enum {
	OFF,
	ON,
	NONE,
};

void sendSNMP() {
	uint8_t output = NONE;
    uint16_t channel = 0;
	bool success = false;

    for (uint8_t i = 0; i < restServer.args(); i++) {
		if(restServer.argName(i) == "output") {
			if(restServer.arg(i) == "on") {
				output = ON;
			} else if (restServer.arg(i) == "off") {
				output = OFF;
			}
		} else if(restServer.argName(i) == "ch") {
            channel = restServer.arg(i).toInt();
        }
	}

	auto ipAddr = IPAddress(192,168,140,79);
    if (output != NONE && channel != 0) {
		SNMP::Message *snmp_msg = mpod.output(channel, output);
		snmp.send(snmp_msg, ipAddr, SNMP::Port::SNMP);
		delete snmp_msg;
		success = true;
	}

    if (success) {
		SNMP::Message *snmp_msg = mpod.read(channel);
		snmp.send(snmp_msg, ipAddr, SNMP::Port::SNMP);
		delete snmp_msg;
    }

	String http_msg = "{\n";
	http_msg += "\"target\":\"" + ipAddr.toString() + "\",\n";
	http_msg += "\"arguments\":{";
    http_msg += "\"channel\":" + String(channel) + ",";
    http_msg += "\"output\":" + String(output) + "},\n";
	http_msg += "\"success\":" + String(success); 

    if (success) {
        http_msg += ",\n";
        http_msg += mpod.toJSON();
    }

	http_msg += "\n}";

	restServer.send(200, "text/json", http_msg);
}

void pollMPODChannel() {
    uint16_t channel = 0;
    for(uint8_t i = 0; i < restServer.args(); i++) {
        if(restServer.argName(i) == "ch") {
            channel = restServer.arg(i).toInt();
        }
    }

    String ret;
    if(!channel) {
        ret = "\"reason\": \"Invalid channel\"";
    } else {
	    auto ipAddr = IPAddress(192,168,140,79);
        SNMP::Message *snmp_msg = mpod.read(channel);
		snmp.send(snmp_msg, ipAddr, SNMP::Port::SNMP);
		delete snmp_msg;
	    ret = mpod.toJSON();  // TODO: This has stale info at this stage!
    }

	String http_msg = "{\n";
	http_msg += ret;
	http_msg += ",\"success\": ";
    http_msg += channel ? 1 : 0;
    http_msg += ",\"channel\": ";
    http_msg += channel;
	http_msg += "\n}";

	restServer.send(200, "text/json", http_msg);
}