appview/pages/markup: move sanitizer to separate file

Signed-off-by: oppiliappan <[e-mail]>

appview/pages/markup/markdown.go

···
 	"bytes"
 	"fmt"
 	"io"
-	"maps"
 	"net/url"
 	"path"
-	"regexp"
-	"slices"
 	"strings"
 
-	"github.com/alecthomas/chroma/v2"
 	chromahtml "github.com/alecthomas/chroma/v2/formatters/html"
 	"github.com/alecthomas/chroma/v2/styles"
-	"github.com/microcosm-cc/bluemonday"
 	"github.com/yuin/goldmark"
 	highlighting "github.com/yuin/goldmark-highlighting/v2"
 	"github.com/yuin/goldmark/ast"
···
 	IsDev        bool
 	RendererType RendererType
 	Sanitizer    Sanitizer
-}
-
-type Sanitizer struct {
-	defaultPolicy *bluemonday.Policy
 }
 
 func (rctx *RenderContext) RenderMarkdown(source string) string {
···
 
 func (rctx *RenderContext) SanitizeDefault(html string) string {
 	return rctx.Sanitizer.defaultPolicy.Sanitize(html)
-}
-
-func NewSanitizer() Sanitizer {
-	return Sanitizer{
-		defaultPolicy: defaultPolicy(),
-	}
-}
-func defaultPolicy() *bluemonday.Policy {
-	policy := bluemonday.UGCPolicy()
-
-	// Allow generally safe attributes
-	generalSafeAttrs := []string{
-		"abbr", "accept", "accept-charset",
-		"accesskey", "action", "align", "alt",
-		"aria-describedby", "aria-hidden", "aria-label", "aria-labelledby",
-		"axis", "border", "cellpadding", "cellspacing", "char",
-		"charoff", "charset", "checked",
-		"clear", "cols", "colspan", "color",
-		"compact", "coords", "datetime", "dir",
-		"disabled", "enctype", "for", "frame",
-		"headers", "height", "hreflang",
-		"hspace", "ismap", "label", "lang",
-		"maxlength", "media", "method",
-		"multiple", "name", "nohref", "noshade",
-		"nowrap", "open", "prompt", "readonly", "rel", "rev",
-		"rows", "rowspan", "rules", "scope",
-		"selected", "shape", "size", "span",
-		"start", "summary", "tabindex", "target",
-		"title", "type", "usemap", "valign", "value",
-		"vspace", "width", "itemprop",
-	}
-
-	generalSafeElements := []string{
-		"h1", "h2", "h3", "h4", "h5", "h6", "h7", "h8", "br", "b", "i", "strong", "em", "a", "pre", "code", "img", "tt",
-		"div", "ins", "del", "sup", "sub", "p", "ol", "ul", "table", "thead", "tbody", "tfoot", "blockquote", "label",
-		"dl", "dt", "dd", "kbd", "q", "samp", "var", "hr", "ruby", "rt", "rp", "li", "tr", "td", "th", "s", "strike", "summary",
-		"details", "caption", "figure", "figcaption",
-		"abbr", "bdo", "cite", "dfn", "mark", "small", "span", "time", "video", "wbr",
-	}
-
-	policy.AllowAttrs(generalSafeAttrs...).OnElements(generalSafeElements...)
-
-	// video
-	policy.AllowAttrs("src", "autoplay", "controls").OnElements("video")
-
-	// checkboxes
-	policy.AllowAttrs("type").Matching(regexp.MustCompile(`^checkbox$`)).OnElements("input")
-	policy.AllowAttrs("checked", "disabled", "data-source-position").OnElements("input")
-
-	// for code blocks
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(`chroma`)).OnElements("pre")
-	policy.AllowAttrs("class").Matching(regexp.MustCompile(strings.Join(slices.Collect(maps.Values(chroma.StandardTypes)), "|"))).OnElements("span")
-
-	// centering content
-	policy.AllowElements("center")
-
-	policy.AllowAttrs("align", "style", "width", "height").Globally()
-	policy.AllowStyles(
-		"margin",
-		"padding",
-		"text-align",
-		"font-weight",
-		"text-decoration",
-		"padding-left",
-		"padding-right",
-		"padding-top",
-		"padding-bottom",
-		"margin-left",
-		"margin-right",
-		"margin-top",
-		"margin-bottom",
-	)
-
-	return policy
 }
 
 type MarkdownTransformer struct {

appview/pages/markup/sanitizer.go

···
+package markup
+
+import (
+	"maps"
+	"regexp"
+	"slices"
+	"strings"
+
+	"github.com/alecthomas/chroma/v2"
+	"github.com/microcosm-cc/bluemonday"
+)
+
+type Sanitizer struct {
+	defaultPolicy *bluemonday.Policy
+}
+
+func NewSanitizer() Sanitizer {
+	return Sanitizer{
+		defaultPolicy: defaultPolicy(),
+	}
+}
+
+func defaultPolicy() *bluemonday.Policy {
+	policy := bluemonday.UGCPolicy()
+
+	// Allow generally safe attributes
+	generalSafeAttrs := []string{
+		"abbr", "accept", "accept-charset",
+		"accesskey", "action", "align", "alt",
+		"aria-describedby", "aria-hidden", "aria-label", "aria-labelledby",
+		"axis", "border", "cellpadding", "cellspacing", "char",
+		"charoff", "charset", "checked",
+		"clear", "cols", "colspan", "color",
+		"compact", "coords", "datetime", "dir",
+		"disabled", "enctype", "for", "frame",
+		"headers", "height", "hreflang",
+		"hspace", "ismap", "label", "lang",
+		"maxlength", "media", "method",
+		"multiple", "name", "nohref", "noshade",
+		"nowrap", "open", "prompt", "readonly", "rel", "rev",
+		"rows", "rowspan", "rules", "scope",
+		"selected", "shape", "size", "span",
+		"start", "summary", "tabindex", "target",
+		"title", "type", "usemap", "valign", "value",
+		"vspace", "width", "itemprop",
+	}
+
+	generalSafeElements := []string{
+		"h1", "h2", "h3", "h4", "h5", "h6", "h7", "h8", "br", "b", "i", "strong", "em", "a", "pre", "code", "img", "tt",
+		"div", "ins", "del", "sup", "sub", "p", "ol", "ul", "table", "thead", "tbody", "tfoot", "blockquote", "label",
+		"dl", "dt", "dd", "kbd", "q", "samp", "var", "hr", "ruby", "rt", "rp", "li", "tr", "td", "th", "s", "strike", "summary",
+		"details", "caption", "figure", "figcaption",
+		"abbr", "bdo", "cite", "dfn", "mark", "small", "span", "time", "video", "wbr",
+	}
+
+	policy.AllowAttrs(generalSafeAttrs...).OnElements(generalSafeElements...)
+
+	// video
+	policy.AllowAttrs("src", "autoplay", "controls").OnElements("video")
+
+	// checkboxes
+	policy.AllowAttrs("type").Matching(regexp.MustCompile(`^checkbox$`)).OnElements("input")
+	policy.AllowAttrs("checked", "disabled", "data-source-position").OnElements("input")
+
+	// for code blocks
+	policy.AllowAttrs("class").Matching(regexp.MustCompile(`chroma`)).OnElements("pre")
+	policy.AllowAttrs("class").Matching(regexp.MustCompile(strings.Join(slices.Collect(maps.Values(chroma.StandardTypes)), "|"))).OnElements("span")
+
+	// centering content
+	policy.AllowElements("center")
+
+	policy.AllowAttrs("align", "style", "width", "height").Globally()
+	policy.AllowStyles(
+		"margin",
+		"padding",
+		"text-align",
+		"font-weight",
+		"text-decoration",
+		"padding-left",
+		"padding-right",
+		"padding-top",
+		"padding-bottom",
+		"margin-left",
+		"margin-right",
+		"margin-top",
+		"margin-bottom",
+	)
+
+	return policy
+}