mirror of
https://github.com/osmarks/mycorrhiza.git
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45 lines
1.2 KiB
Go
45 lines
1.2 KiB
Go
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/* This file implements things defined by Wikilink RFC. See :main/help/wikilink
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*/
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package util
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import (
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"path"
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"regexp"
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"strings"
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)
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// `name` must be non-empty.
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func sections(name string) (mycel, hyphaName string) {
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mycelRe := regexp.MustCompile(`^:.*/`)
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loc := mycelRe.FindIndex([]byte(name))
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if loc != nil { // if has mycel
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mycel = name[:loc[1]]
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name = name[loc[1]:]
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}
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return mycel, name
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}
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// Wikilink processes `link` as defined by :main/help/wikilink assuming that `atHypha` is current hypha name.
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func Wikilink(link, atHypha string) string {
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mycel, hyphaName := sections(atHypha)
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urlProtocolRe := regexp.MustCompile(`^[a-zA-Z]+:`)
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switch {
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case strings.HasPrefix(link, "::"):
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return "/" + mycel + link[2:]
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case strings.HasPrefix(link, ":"):
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return "/" + link
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case strings.HasPrefix(link, "../") && strings.Count(hyphaName, "/") > 0:
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return "/" + path.Dir(atHypha) + "/" + link[3:]
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case strings.HasPrefix(link, "../"):
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return "/" + mycel + link[3:]
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case strings.HasPrefix(link, "/"):
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return "/" + atHypha + link
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case strings.HasPrefix(link, "./"):
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return "/" + atHypha + link[1:]
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case urlProtocolRe.MatchString(link):
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return link
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default:
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return "/" + link
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}
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}
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