crypto.cpp

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#include <WiFiClientSecure.h>
#include <HTTPClient.h>
 
#include "crypto.h"
#include "crypto_parser.h"
 
static String url = "https://api.coingecko.com/api/v3/simple/price?vs_currencies=USD&include_24hr_change=true&precision=5&ids=";
CryptoJsonListener crypto_listener;
 
// Valid till 3 July 2023
static const char *cert = "-----BEGIN CERTIFICATE-----\n"                      \
              "MIIDdzCCAl+gAwIBAgIEAgAAuTANBgkqhkiG9w0BAQUFADBaMQswCQYDVQQGEwJJ\n" \
              "RTESMBAGA1UEChMJQmFsdGltb3JlMRMwEQYDVQQLEwpDeWJlclRydXN0MSIwIAYD\n" \
              "VQQDExlCYWx0aW1vcmUgQ3liZXJUcnVzdCBSb290MB4XDTAwMDUxMjE4NDYwMFoX\n" \
              "DTI1MDUxMjIzNTkwMFowWjELMAkGA1UEBhMCSUUxEjAQBgNVBAoTCUJhbHRpbW9y\n" \
              "ZTETMBEGA1UECxMKQ3liZXJUcnVzdDEiMCAGA1UEAxMZQmFsdGltb3JlIEN5YmVy\n" \
              "VHJ1c3QgUm9vdDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAKMEuyKr\n" \
              "mD1X6CZymrV51Cni4eiVgLGw41uOKymaZN+hXe2wCQVt2yguzmKiYv60iNoS6zjr\n" \
              "IZ3AQSsBUnuId9Mcj8e6uYi1agnnc+gRQKfRzMpijS3ljwumUNKoUMMo6vWrJYeK\n" \
              "mpYcqWe4PwzV9/lSEy/CG9VwcPCPwBLKBsua4dnKM3p31vjsufFoREJIE9LAwqSu\n" \
              "XmD+tqYF/LTdB1kC1FkYmGP1pWPgkAx9XbIGevOF6uvUA65ehD5f/xXtabz5OTZy\n" \
              "dc93Uk3zyZAsuT3lySNTPx8kmCFcB5kpvcY67Oduhjprl3RjM71oGDHweI12v/ye\n" \
              "jl0qhqdNkNwnGjkCAwEAAaNFMEMwHQYDVR0OBBYEFOWdWTCCR1jMrPoIVDaGezq1\n" \
              "BE3wMBIGA1UdEwEB/wQIMAYBAf8CAQMwDgYDVR0PAQH/BAQDAgEGMA0GCSqGSIb3\n" \
              "DQEBBQUAA4IBAQCFDF2O5G9RaEIFoN27TyclhAO992T9Ldcw46QQF+vaKSm2eT92\n" \
              "9hkTI7gQCvlYpNRhcL0EYWoSihfVCr3FvDB81ukMJY2GQE/szKN+OMY3EU/t3Wgx\n" \
              "jkzSswF07r51XgdIGn9w/xZchMB5hbgF/X++ZRGjD8ACtPhSNzkE1akxehi/oCr0\n" \
              "Epn3o0WC4zxe9Z2etciefC7IpJ5OCBRLbf1wbWsaY71k5h+3zvDyny67G7fyUIhz\n" \
              "ksLi4xaNmjICq44Y3ekQEe5+NauQrz4wlHrQMz2nZQ/1/I6eYs9HRCwBXbsdtTLS\n" \
              "R9I4LtD+gdwyah617jzV/OeBHRnDJELqYzmp\n"                 \
              "-----END CERTIFICATE-----\n";
 
int8_t PaperdinkUICryptoClass::fetch_data(const char *ticker)
{
    int httpCode, ret = 0;
    String payload;
    WiFiClientSecure *client = new WiFiClientSecure;
    client->setCACert(cert);
 
    {
        HTTPClient https;
 
        String get_url = url + ticker;
 
        https.begin(*client, get_url.c_str());
        https.addHeader("Content-Type", "application/json", 0, 0);
 
        httpCode = https.GET();
 
        if (httpCode == HTTP_CODE_OK) {
            // HTTP header has been send and Server response header has been handled
            DEBUG.printf("[HTTP] GET SUCCESS\r\n");
            //String payload = https.getString();
            //Serial.println(payload);
            ArudinoStreamParser parser;
            parser.setListener(&crypto_listener);
            https.writeToStream(&parser);
        } else {
            DEBUG.printf("[HTTP] Failed, error: %s\r\n", https.errorToString(httpCode).c_str());
            ret = -1;
        }
 
        https.end();
    }
 
    delete client;
    DEBUG.printf("[HTTP] COMPLETED \r\n");
    return ret;
}
 
void PaperdinkUICryptoClass::display_med_box(GxEPD2_GFX& display, int16_t x, int16_t y, const char *ticker)
{
    int16_t xt, yt;
    uint16_t wt, ht, prev_height = 0, prev_width = 0;
    const int16_t block_width = 100;
    const int16_t block_height = 50;
 
    //const char ticker[] = "Bitcoin";
    const char dummy_price[] = "USD 7.77777777"; // decides width of the box
    //const char change[] = "1.32%";
 
    display.setFont(font_bold);
    display.setTextColor(primary_color);
    display.setTextSize(1);
 
    /* Display ticker string */
    display.getTextBounds(F("Bitcoin"), 0, 0, &xt, &yt, &wt, &ht);
    display.setCursor(x + 14, y + ht + 3);
    display.print(ticker);
 
    display.setFont(font);
    /* Display background */
    display.getTextBounds(dummy_price, 0, 0, &xt, &yt, &wt, &ht);
    display.fillRoundRect(x + 5, y + 30, wt + 20, ht + 10, ht + 10, secondary_color);
    prev_width += x + 5 + wt + 20;
    prev_height += y + 30;
 
    /* Display current price */
    display.setTextColor(tertiary_color);
    display.getTextBounds(price, 0, 0, &xt, &yt, &wt, &ht);
    display.setCursor(5 + ((x + prev_width - wt) / 2), prev_height + ht + 4);
    display.print(price);
    prev_width += 4;
    prev_height += -2;
 
    /* Display arrow */
    const uint8_t *arrow = up_arrow_sml;
    uint16_t color = primary_color;
    if (change[0] == '-') {
        arrow = down_arrow_sml;
        if (display.epd2.hasColor)
            color = secondary_color;
    }
    display.drawBitmap(prev_width, prev_height, arrow, 24, 24, color);
    prev_width += 24; // Size of bitmap
 
    // Display percentage change
    display.setTextColor(primary_color);
    display.getTextBounds(change, 0, 0, &xt, &yt, &wt, &ht);
    display.setCursor(prev_width - wt, y + ht + 3);
    display.print(change);
}
 
PaperdinkUICryptoClass Paperdink_Crypto;