themes-art-deco/image_override.go

package main

import (
	"bytes"
	"context"
)

// ImageOverrideData is the typed view for the image override component.
type ImageOverrideData struct {
	Src     string
	Alt     string
	Caption string
	Frame   string
}

// normaliseImageFrame clamps the frame option to the supported set.
func normaliseImageFrame(v string) string {
	switch v {
	case "stepped", "scallop", "plain":
		return v
	default:
		return "stepped"
	}
}

// ArtDecoImageBlock overrides the built-in "image" block when the Art Deco theme is active.
// Content: {"src": "...", "alt": "...", "caption": "...", "frame": "stepped|scallop|plain"}
func ArtDecoImageBlock(ctx context.Context, content map[string]any) string {
	data := ImageOverrideData{
		Src:     getString(content, "src"),
		Alt:     getString(content, "alt"),
		Caption: getString(content, "caption"),
		Frame:   normaliseImageFrame(getString(content, "frame")),
	}

	if data.Src == "" {
		data.Src = fallbackImage()
	}

	var buf bytes.Buffer
	_ = artDecoImageComponent(data).Render(ctx, &buf)
	return buf.String()
}