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package markdown
import (
"errors"
"fmt"
"html/template"
)
var (
ErrUnknownCodeType = errors.New("unkown code type")
ErrInvalidCodeFormat = errors.New("invalid code format")
ErrInvalidCodeBlockPosition = errors.Join(ErrInvalidParagraph, errors.New("invalid code block position"))
)
type codeType uint
const (
codeOneLine codeType = 1
codeMultiLine codeType = 2
)
type astCode struct {
content string
before string
codeType codeType
}
func (a *astCode) Eval(_ *Option) (template.HTML, *ParseError) {
switch a.codeType {
case codeOneLine:
return template.HTML(fmt.Sprintf("<code>%s</code>", template.HTMLEscapeString(a.content))), nil
case codeMultiLine:
return template.HTML(fmt.Sprintf("<pre><code>%s</code></pre>", template.HTMLEscapeString(a.content))), nil
default:
return "", &ParseError{lxs: lexers{}, internal: ErrUnknownCodeType}
}
}
func code(lxs *lexers) (*astCode, *ParseError) {
tree := new(astCode)
current := lxs.Current().Value
if len(current) == 3 {
tree.codeType = codeMultiLine
} else if len(current) == 1 {
tree.codeType = codeOneLine
} else {
return nil, &ParseError{lxs: *lxs, internal: ErrInvalidCodeFormat}
}
started := false
for lxs.Next() && lxs.Current().Value != current {
if lxs.Current().Type == lexerBreak {
if tree.codeType == codeOneLine {
return nil, &ParseError{lxs: *lxs, internal: ErrInvalidCodeFormat}
}
if !started {
started = true
}
}
if started || tree.codeType == codeOneLine {
tree.content += lxs.Current().Value
} else {
tree.before += lxs.Current().Value
}
}
return tree, nil
}
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