Matrix/main.go

package main

import (
	"fmt"

	"github.com/buger/goterm"
	"github.com/go-resty/resty/v2"
	"github.com/joho/godotenv"
)

func output(client *resty.Client, url string, scale, width, height uint, arr [][]Cell) {
	goterm.MoveCursor(1, 4)
	// Prepare instructions for matrix
	instructions := make([]interface{}, 1)
	instructions[0] = Clear{Endpoint: CLEAR}
	// Append all live cells as pixel instructions
	for j := 0; j < int(height/scale); j++ {
		for i := 0; i < int(width/scale); i++ {
			if arr[i][j].live {
				instructions = append(instructions, Rectangle{X: i * int(scale), Y: j * int(scale), W: scale, H: scale, Endpoint: RECTANGLE})
				goterm.Print("X")
				continue
			}
			goterm.Print(" ")
		}
		goterm.Println()
	}
	// Append update instruction
	instructions = append(instructions, Update{Endpoint: UPDATE})
	// Send to matrix
	sendRequest(client, url, instructions)

	// Update terminal UI
	goterm.Flush()
}

func main() {
	const FPS = 2
	const SCALE = 2

	// Try loading .env file if it exists
	godotenv.Load(".env")

	// Load env server data
	url, width, height := loadMatrixData()
	goterm.Printf("On '%s' at [%d x %d] with %d FPS\n", url, width, height, FPS)

	// Initialize resty client
	client := resty.New()
	// Initialize pixel color
	err := sendRequest(client, url, []interface{}{Color{R: 255, G: 255, B: 255, Endpoint: COLOR}})
	if err != nil {
		goterm.Println(err)
	}

	// Run Game of Life
	done := setup(func(c [][]Cell) {
		output(client, url, SCALE, width, height, c)
	}, SCALE, width, height, FPS)

	// Wait for user input to quit
	fmt.Scanln()
	// Stop Game of Life, wait for routine
	done <- true
}