60 lines
1.2 KiB
Go
60 lines
1.2 KiB
Go
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//+build experiment
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// ! EXPERIMENTAL
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package main
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import (
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"errors"
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"regexp"
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)
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var tagFinder *regexp.Regexp
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func init() {
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tagFinder = regexp.MustCompile(`(?s)\{\{(.*)\}\}`)
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}
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func icecreamSoup(tmpl string) error {
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tagIndices := tagFinder.FindAllStringIndex(tmpl, -1)
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if tagIndices != nil && len(tagIndices) > 0 {
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if tagIndices[0][0] == 0 {
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return errors.New("We don't support tags in the outermost layer yet")
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}
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for _, tagIndex := range tagIndices {
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var nestingLayer = 0
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for i := tagIndex[0]; i > 0; i-- {
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switch tmpl[i] {
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case '>':
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i, closeTag, err := tasteTagToLeft(tmpl, i)
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if err != nil {
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return err
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}
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if closeTag {
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nestingLayer++
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}
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case '<':
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}
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}
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}
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}
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}
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func tasteTagToLeft(tmpl string, index int) (indexOut int, closeTag bool, err error) {
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var foundLeftBrace = false
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for ; index > 0; index-- {
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// What if the / isn't adjacent to the < but has a space instead? Is that even valid?
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if index >= 1 && tmpl[index] == '/' && tmpl[index-1] == '<' {
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closeTag = true
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break
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} else if tmpl[index] == '<' {
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foundLeftBrace = true
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}
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}
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if !foundLeftBrace {
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return errors.New("The left portion of the tag is missing")
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}
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return index, closeTag, nil
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}
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