reprogl

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package style
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import (
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	"strconv"
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	"strings"
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	"xelbot.com/reprogl/models"
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)
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func GenerateArticleStyles(article *models.Article, acceptAvif, acceptWebp bool) string {
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	style := "<style>\n"
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	style += commonStyle() + "\n"
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	if article.HasImage() {
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		style += styleWithImage(article.FeaturedImage, acceptAvif, acceptWebp)
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	} else {
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		style += defaultStyleWithoutImage() + "\n"
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	}
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	style += "    </style>"
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	return cdnReplace(style)
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}
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func styleWithImage(image models.FeaturedImage, acceptAvif, acceptWebp bool) string {
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	var cssRules string
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	srcSet := image.DecodeSrcSet()
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	if acceptAvif && image.HasAvif() {
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		cssRules = stylesImagesByFormat(srcSet, "avif")
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	} else if acceptWebp && image.HasWebp() {
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		cssRules = stylesImagesByFormat(srcSet, "webp")
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	} else {
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		cssRules = stylesImagesByFormat(srcSet, "origin")
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		if image.HasWebp() {
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			srcSetItem, _ := srcSet["webp"]
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			cssRules += "      @supports (background-image:url(%cdn%/uploads/"
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			cssRules += srcSetItem.Items[0].Path + ")){\n"
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			cssRules += strings.TrimRight(stylesImagesByFormat(srcSet, "webp"), "\n") + "}\n"
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		}
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	}
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	return cssRules
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}
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func stylesImagesByFormat(srcSet map[string]models.SrcSetItem, format string) string {
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	var cssRules string
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	var firstImage = true
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	if srcSetItem, found := srcSet[format]; found {
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		for _, srcImage := range srcSetItem.Items {
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			if firstImage {
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				cssRules += "      .post-view .post-view-sidebar{background-image:url(%cdn%/uploads/"
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				cssRules += srcImage.Path + ")}\n"
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				firstImage = false
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			} else {
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				cssRules += "      @media only screen and (max-width:" + strconv.Itoa(srcImage.Width) + "px){"
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				cssRules += ".post-view .post-view-sidebar{background-image:url(%cdn%/uploads/"
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				cssRules += srcImage.Path + ")}}\n"
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			}
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		}
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	}
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	return cssRules
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}
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