70 lines
1.8 KiB
Go
70 lines
1.8 KiB
Go
package gemtext
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import (
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"fmt"
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"path/filepath"
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"strings"
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)
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// addPrefix adds the prefix "pref" to a path if it is absolute
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// this is to allow protocol-independent absolute links.
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func addPrefix(pref string, link string) string {
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if filepath.IsAbs(link) {
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return filepath.Join(pref, link)
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} else {
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return link
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}
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}
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// RenderLink takes a GemtextObject and returns a gemini link as a string or an error if the object is not a link.
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func RenderLink(obj GemtextObject) (string, error) {
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if obj.Type != LINK {
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return "", fmt.Errorf("Invalid Link")
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} else if obj.Path == "" {
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return "", fmt.Errorf("Invalid Link")
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}
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str := fmt.Sprintf("=> %s %s",obj.Path, obj.Text)
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return str,nil
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}
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// RenderHeading takes a GemtextObject and returns a gemini heading as a string or an error if the object is not a heading.
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func RenderHeading(obj GemtextObject) (string, error) {
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if obj.Type != HEADING {
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return "", fmt.Errorf("Invalid Heading (Not a Heading)")
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} else if obj.Level > 3 {
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return "", fmt.Errorf("Invalid Heading (Invalid level)")
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}
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return strings.Repeat("#", obj.Level) + " " + obj.Text, nil
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}
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// RenderGemtext takes a GemtextPage and renders it into Gemtext.
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func RenderGemtext(p GemtextPage) (string, error) {
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str := ""
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for _, o := range p {
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switch {
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case o.Type == TEXT:
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str += o.Text + "\n"
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case o.Type == LINK:
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l, err := RenderLink(o)
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if err != nil {
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return "", err
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}
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str += l + "\n"
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case o.Type == PREFORMATTED_TOGGLE:
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str += "```" + o.Text + "\n"
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case o.Type == PREFORMATTED_TEXT:
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str += o.Text + "\n"
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case o.Type == HEADING:
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l, err := RenderHeading(o)
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if err != nil {
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return "", err
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}
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str += l + "\n"
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case o.Type == LIST:
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str += "* " + o.Text + "\n"
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case o.Type == QUOTE:
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str += ">" + o.Text + "\n"
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}
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}
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return str, nil
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} |