feat: Waku v2 bridge

Issue #12610

vendor/github.com/status-im/markdown/parser/include.go

@@ -0,0 +1,129 @@
+package parser
+
+import (
+	"bytes"
+	"path"
+	"path/filepath"
+)
+
+// isInclude parses {{...}}[...], that contains a path between the {{, the [...] syntax contains
+// an address to select which lines to include. It is treated as an opaque string and just given
+// to readInclude.
+func (p *Parser) isInclude(data []byte) (filename string, address []byte, consumed int) {
+	i := skipCharN(data, 0, ' ', 3) // start with up to 3 spaces
+	if len(data[i:]) < 3 {
+		return "", nil, 0
+	}
+	if data[i] != '{' || data[i+1] != '{' {
+		return "", nil, 0
+	}
+	start := i + 2
+
+	// find the end delimiter
+	i = skipUntilChar(data, i, '}')
+	if i+1 >= len(data) {
+		return "", nil, 0
+	}
+	end := i
+	i++
+	if data[i] != '}' {
+		return "", nil, 0
+	}
+	filename = string(data[start:end])
+
+	if i+1 < len(data) && data[i+1] == '[' { // potential address specification
+		start := i + 2
+
+		end = skipUntilChar(data, start, ']')
+		if end >= len(data) {
+			return "", nil, 0
+		}
+		address = data[start:end]
+		return filename, address, end + 1
+	}
+
+	return filename, address, i + 1
+}
+
+func (p *Parser) readInclude(from, file string, address []byte) []byte {
+	if p.Opts.ReadIncludeFn != nil {
+		return p.Opts.ReadIncludeFn(from, file, address)
+	}
+
+	return nil
+}
+
+// isCodeInclude parses <{{...}} which is similar to isInclude the returned bytes are, however wrapped in a code block.
+func (p *Parser) isCodeInclude(data []byte) (filename string, address []byte, consumed int) {
+	i := skipCharN(data, 0, ' ', 3) // start with up to 3 spaces
+	if len(data[i:]) < 3 {
+		return "", nil, 0
+	}
+	if data[i] != '<' {
+		return "", nil, 0
+	}
+	start := i
+
+	filename, address, consumed = p.isInclude(data[i+1:])
+	if consumed == 0 {
+		return "", nil, 0
+	}
+	return filename, address, start + consumed + 1
+}
+
+// readCodeInclude acts like include except the returned bytes are wrapped in a fenced code block.
+func (p *Parser) readCodeInclude(from, file string, address []byte) []byte {
+	data := p.readInclude(from, file, address)
+	if data == nil {
+		return nil
+	}
+	ext := path.Ext(file)
+	buf := &bytes.Buffer{}
+	buf.Write([]byte("```"))
+	if ext != "" { // starts with a dot
+		buf.WriteString(" " + ext[1:] + "\n")
+	} else {
+		buf.WriteByte('\n')
+	}
+	buf.Write(data)
+	buf.WriteString("```\n")
+	return buf.Bytes()
+}
+
+// incStack hold the current stack of chained includes. Each value is the containing
+// path of the file being parsed.
+type incStack struct {
+	stack []string
+}
+
+func newIncStack() *incStack {
+	return &incStack{stack: []string{}}
+}
+
+// Push updates i with new.
+func (i *incStack) Push(new string) {
+	if path.IsAbs(new) {
+		i.stack = append(i.stack, path.Dir(new))
+		return
+	}
+	last := ""
+	if len(i.stack) > 0 {
+		last = i.stack[len(i.stack)-1]
+	}
+	i.stack = append(i.stack, path.Dir(filepath.Join(last, new)))
+}
+
+// Pop pops the last value.
+func (i *incStack) Pop() {
+	if len(i.stack) == 0 {
+		return
+	}
+	i.stack = i.stack[:len(i.stack)-1]
+}
+
+func (i *incStack) Last() string {
+	if len(i.stack) == 0 {
+		return ""
+	}
+	return i.stack[len(i.stack)-1]
+}