cardbuilder_main.go

func main() {

	// Open the cards file
	inputFile, err := os.Open("cards.json")
	if err != nil {
		fmt.Println(err)
	}
	defer inputFile.Close()

	// Read the cards file into bytes
	byteValue, _ := ioutil.ReadAll(inputFile)

	// Initialize the slice of cards that will be printed
	var cards []Card

	// Unmarshal the input file into a slice of Card objects
	json.Unmarshal(byteValue, &cards)

	// Read the card template file
	b, err := ioutil.ReadFile("card.html")
	if err != nil {
		fmt.Print(err)
	}

	// Convert the template to a string
	tmpl := string(b)

	// Initialize a new liquid templating engine
	engine := liquid.NewEngine()

	// Get the current working directory
	path, err := os.Getwd()
	if err != nil {
		log.Println(err)
	}

	// The name of the output file to screenshot in Chrome
	renderFile := fmt.Sprintf(`file://%s/render.html`, path)

	// Iterate over the slice of cards
	for i, c := range cards {

		// Create a binding for the card object
		bindings := map[string]interface{}{
			"card": c,
		}

		// Inject the bindings to the liquid engine and use the template from the card.html file
		out, err := engine.ParseAndRenderString(tmpl, bindings)
		if err != nil {
			log.Fatalln(err)
		}

		// Convert the result from the template to bytes so that it can be written to a file
		outBytes := []byte(out)

		// Create a filename for the screenshot
		fname := fmt.Sprintf("./output/render_%d.png", i)

		// Write the output from the template to a file
		ioutil.WriteFile("./render.html", outBytes, 0644)

		// Use headless Chrome to open the HTML template, take a screenshot, and save to the render file
		screenshot(renderFile, fname)
	}
}