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mycorrhiza/hyphae/iterators.go
2021-02-20 19:03:54 +05:00

58 lines
1.3 KiB
Go

// File `iterators.go` contains stuff that iterates over hyphae.
package hyphae
import (
"strings"
)
// YieldExistingHyphae iterates over all hyphae and yields all existing ones.
func YieldExistingHyphae() chan *Hypha {
ch := make(chan *Hypha)
go func() {
for _, h := range byNames {
if h.Exists {
ch <- h
}
}
close(ch)
}()
return ch
}
// FilterTextHyphae filters the source channel and yields only those hyphae than have text parts.
func FilterTextHyphae(src chan *Hypha) chan *Hypha {
sink := make(chan *Hypha)
go func() {
for h := range src {
if h.TextPath != "" {
sink <- h
}
}
close(sink)
}()
return sink
}
// Subhyphae returns slice of subhyphae.
func (h *Hypha) Subhyphae() []*Hypha {
hyphae := []*Hypha{}
for subh := range YieldExistingHyphae() {
if strings.HasPrefix(subh.Name, h.Name+"/") {
hyphae = append(hyphae, subh)
}
}
return hyphae
}
// AreFreeNames checks if all given `hyphaNames` are not taken. If they are not taken, `ok` is true. If not, `firstFailure` is the name of the first met hypha that is not free.
func AreFreeNames(hyphaNames ...string) (firstFailure string, ok bool) {
for h := range YieldExistingHyphae() {
for _, hn := range hyphaNames {
if hn == h.Name {
return hn, false
}
}
}
return "", true
}