device-epd/src/faceCalendar.cpp

#include <HTTPClient.h>
#include <SPIFFS.h>
#include <ArduinoJson.h>
#include <pngle.h>
#include "faceCalendar.h"
#include "display.h"
#include "datetime.h"
#include "tools.h"
#include "image.h"
#include "download.h"
#include "faceWeather.h"
#include "faceWeatherIcons.h"

#include <Fonts/FreeMono12pt7b.h>	 // weekday - month year
#include <Fonts/FreeSans24pt7b.h>	 // current day
#include <Fonts/FreeSansBold24pt7b.h> // current day

bool downloadRandomePicture();
void showFaceCalendar();
void display_calender();
void display_picture();
void display_time();

const char faceCalendarPicutreJson[] = "/calendarPhoto.json";
const char faceCalendarPicture[] = "/calendarPhoto.png";

void setupFaceCalendar()
{
	//downloadRandomePicture();
	//downloadFile("https://images.unsplash.com/photo-1582225764554-a82806fe9f30?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjExMDM0OH0&w=390&h=384&fm=png&fit=crop&duotone=000000,FFFFFF", "/tom");
}

void loopFaceCalendar()
{
	// TODO update picture every x seconds
	showFaceCalendar();
}

void showFaceCalendar()
{
	display.setRotation(0);
	display.setFullWindow();
	display.firstPage();
	display.fillScreen(GxEPD_WHITE);

	display_picture();
	display_calender();

	displayFlush();
}

bool downloadRandomePicture()
{
	// download json file
	Serial.println("  download json");
	String randomUrl = "https://api.unsplash.com/photos/random";
	randomUrl += "&client_id=6cb16f348161f1c3e6bf21172c398893beec2d8d3ccf740bff4e72feac507422";

	if (true) // downloadFile(randomUrl, faceCalendarPicutreJson)
	{
		Serial.println("  read json");

		File file = SPIFFS.open(faceCalendarPicutreJson);
		if (!file)
		{
			Serial.print("Failed to open file: ");
			Serial.println(faceCalendarPicutreJson);

			return false;
		}

		StaticJsonDocument<5000> docPicutre; // Use arduinojson.org/v6/assistant to compute the capacity.
		DeserializationError error = deserializeJson(docPicutre, file);
		file.close();
		if (error)
		{
			Serial.print("Failed to read file: ");
			Serial.println(faceCalendarPicutreJson);

			Serial.println(error.c_str());

			return false;
		}

		//String pictureUrl = "https://images.unsplash.com/photo-1582910587039-b4f085805c86?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjExMDM0OH0";
		String pictureUrl = docPicutre["urls"]["raw"];
		pictureUrl += "&w=390&h=384";			// size
		pictureUrl += "&fm=png";				// format
		pictureUrl += "&fit=crop";				// crop to needed size
		pictureUrl += "&duotone=000000,FFFFFF"; // grayscale to save bytes

		//downloadFile(pictureUrl, faceCalendarPicture);

		return true;
	}

	return false;
}

/**
 * download and update calendar data
 * @todo is not working
 */
bool updateCalendarData()
{
	//downloadFile("https://images.unsplash.com/photo-1582225764554-a82806fe9f30?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjExMDM0OH0&w=390&h=384&fm=png&fit=crop&duotone=000000,FFFFFF", "/tom");
	return false;

	if (downloadRandomePicture())
	{
		//readWeatherData();

		return true;
	}

	return false;
}

void display_calender()
{
	// init
	int16_t sideWidth = 250;
	int16_t tbx, tby;
	uint16_t tbw, tbh, x;
	char label[64];
	display.setTextColor(GxEPD_WHITE);
	display.setTextSize(1);
	display.setRotation(0);

	// left side
	display.fillRect(0, 0, sideWidth, display.height(), GxEPD_BLACK);

	// weekday
	strftime(label, 64, "%A", &now);
	display.setFont(&FreeMono12pt7b);
	display.getTextBounds(label, 0, 0, &tbx, &tby, &tbw, &tbh);
	x = ((sideWidth - tbw) / 2) - tbx;
	display.setCursor(x, 30);
	display.println(label);

	// today
	display.setFont(&FreeSansBold24pt7b);
	display.setTextSize(2);
	display.getTextBounds("29", 0, 0, &tbx, &tby, &tbw, &tbh);
	x = ((sideWidth - tbw) / 2) - tbx;
	display.setCursor(x, 120);
	display.println(now.tm_mday);

	// month yearh
	strftime(label, 64, "%B %Y", &now);
	display.setTextSize(1);
	display.setFont(&FreeMono12pt7b);
	display.getTextBounds(label, 0, 0, &tbx, &tby, &tbw, &tbh);
	x = ((sideWidth - tbw) / 2) - tbx;
	display.setCursor(x, 150);
	display.println(label);

	// weekday headline
	display.setFont(&FreeMonoBold9pt7b);
	display.setCursor(20, 192);
	display.println("Mo Tu We Th Fr Sa Su");

	display.setCursor(20, 220);

	// skip week days from previous month
	uint8_t skip = (now.day_offset == 0 ? 7 : now.day_offset);
	for (uint8_t d = 1; d < skip; d++)
	{
		display.print("   ");
	}

	for (uint8_t d = 1; d <= now.days_in_month; d++)
	{
		display.printf("%2d ", d);

		if ((d + now.day_offset - 1) % 7 == 0)
		{
			// new week
			display.println("");
			display.setCursor(20, display.getCursorY());
		}
	}

	// current weather
	display.drawLine(15, 320, sideWidth - 15, 320, GxEPD_WHITE);

	// icon
	const unsigned char *icon = getIconById(weatherData.current_icon, 64);
	if (icon)
	{
		display.drawInvertedBitmap(72, 325, icon, 64, 64, GxEPD_WHITE);
	}

	// temperature
	display.setFont(&FreeSans24pt7b);
	display.setTextSize(1);
	display.setCursor(150, 367);
	display.println(weatherData.current_temp);
}

void display_picture()
{
	File file = SPIFFS.open(faceCalendarPicture, "r");
	if (!file)
	{
		Serial.println(" file not found");
	}

	ImageNew(250, 0, 0, 0, true);

	// TODO check why a small buffer is not working correct
	uint8_t buff[1280] = {0};
	while (int c = file.read(buff, sizeof(buff)))
	{
		ImageWriteBuffer(buff, c);
	}
	file.close();

	ImageFlushBuffer();
}

void display_time()
{
	/*
	int16_t x1, y1;
	uint16_t w, h;

	//display time
	display.setFont(&FreeMonoBold9pt7b); // LARGE_FONT
	display.setTextSize(1);
	display.setTextColor(GxEPD_BLACK);
	int16_t time_base_y = 60;
	int16_t time_base_x = 25;
	display.getTextBounds("03", time_base_x, time_base_y, &x1, &y1, &w, &h); // 03 is arbitrary text to get the height and width
	display.fillRect(time_base_x - 10, time_base_y - h - 10, w + 15, time_base_y + h + 10, GxEPD_WHITE);

	display.setCursor(time_base_x, time_base_y);
	if (now.hour < 10)
	{
		display.print("0");
		display.print(now.hour);
	}
	else
	{
		display.println(now.hour);
	}

	display.setCursor(time_base_x, time_base_y + h + 10);
	if (now.min < 10)
	{
		display.print("0");
		display.print(now.min);
	}
	else
	{
		display.println(now.min);
	}
	*/
}