commit 11d58231f7b47295fe026e86c266472a33e5cf97 · kot.pink/core

+74 -1
appview/pages/markup/markdown.go
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       import (

     

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       	"bytes"

     

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       	"path"

     

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       	"github.com/yuin/goldmark"

     

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       	"github.com/yuin/goldmark/ast"

     

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       	"github.com/yuin/goldmark/extension"

     

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       	"github.com/yuin/goldmark/parser"

     

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       	"github.com/yuin/goldmark/text"

     

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       	"github.com/yuin/goldmark/util"

     

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       )

     

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       -
       func RenderMarkdown(source string) string {

     

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       // RendererType defines the type of renderer to use based on context

     

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       type RendererType int

     

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       const (

     

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       	// RendererTypeRepoMarkdown is for repository documentation markdown files

     

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       	RendererTypeRepoMarkdown RendererType = iota

     

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       	// RendererTypeIssueComment is for issue comments

     

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       	RendererTypeIssueComment

     

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       	// RendererTypePullComment is for pull request comments

     

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       	RendererTypePullComment

     

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       	// RendererTypeDefault is the default renderer with minimal transformations

     

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       	RendererTypeDefault

     

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       )

     

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       // RenderContext holds the contextual data for rendering markdown.

     

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       // It can be initialized empty, and that'll skip any transformations

     

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       // and use the default renderer (RendererTypeDefault).

     

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       type RenderContext struct {

     

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       	Ref          string

     

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       	FullRepoName string

     

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       	RendererType RendererType

     

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       }

     

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       func (rctx *RenderContext) RenderMarkdown(source string) string {

     

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       	md := goldmark.New(

     

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       		goldmark.WithExtensions(extension.GFM),

     

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       		goldmark.WithParserOptions(

     

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       			parser.WithAutoHeadingID(),

     

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       		),

     

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       	)

     

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       	if rctx != nil {

     

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       		var transformers []util.PrioritizedValue

     

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       		transformers = append(transformers, util.Prioritized(&MarkdownTransformer{rctx: rctx}, 10000))

     

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       		md.Parser().AddOptions(

     

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       			parser.WithASTTransformers(transformers...),

     

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       		)

     

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       	}

     

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       	var buf bytes.Buffer

     

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       	if err := md.Convert([]byte(source), &buf); err != nil {

     

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       		return source

     

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       	}

     

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       	return buf.String()

     

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       }

     

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       type MarkdownTransformer struct {

     

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       	rctx *RenderContext

     

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       }

     

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       func (a *MarkdownTransformer) Transform(node *ast.Document, reader text.Reader, pc parser.Context) {

     

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       	_ = ast.Walk(node, func(n ast.Node, entering bool) (ast.WalkStatus, error) {

     

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       		if !entering {

     

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       			return ast.WalkContinue, nil

     

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       		}

     

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       		switch a.rctx.RendererType {

     

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       		case RendererTypeRepoMarkdown:

     

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       			a.rctx.relativeLinkTransformer(n.(*ast.Link))

     

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       		case RendererTypeDefault:

     

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       			a.rctx.relativeLinkTransformer(n.(*ast.Link))

     

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       			// more types here like RendererTypeIssue/Pull etc.

     

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       		}

     

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       		return ast.WalkContinue, nil

     

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       	})

     

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       }

     

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       func (rctx *RenderContext) relativeLinkTransformer(link *ast.Link) {

     

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       	dst := string(link.Destination)

     

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       	if len(dst) == 0 || dst[0] == '#' ||

     

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       		bytes.Contains(link.Destination, []byte("://")) ||

     

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       		bytes.HasPrefix(link.Destination, []byte("mailto:")) {

     

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       		return

     

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       	}

     

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       	newPath := path.Join("/", rctx.FullRepoName, "tree", rctx.Ref, dst)

     

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       	link.Destination = []byte(newPath)

     

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       }
appview/pages/markup/readme.go appview/pages/markup/format.go