70 lines
1.2 KiB
Go
70 lines
1.2 KiB
Go
package templates
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import (
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"bytes"
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"embed"
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"encoding/json"
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"errors"
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"io"
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"math"
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"sync"
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"github.com/agnivade/levenshtein"
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)
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//go:embed index.json
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var indexBytes []byte
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//go:embed *.gotmpl
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var templatesFS embed.FS
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var templatesOnce = sync.OnceValues(func() ([]*Template, error) {
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var templates []*Template
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if err := json.Unmarshal(indexBytes, &templates); err != nil {
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return nil, err
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}
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for _, t := range templates {
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bts, err := templatesFS.ReadFile(t.Name + ".gotmpl")
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if err != nil {
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return nil, err
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}
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// normalize line endings
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t.Bytes = bytes.ReplaceAll(bts, []byte("\r\n"), []byte("\n"))
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}
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return templates, nil
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})
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type Template struct {
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Name string `json:"name"`
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Template string `json:"template"`
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Bytes []byte
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}
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func (t Template) Reader() io.Reader {
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return bytes.NewReader(t.Bytes)
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}
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func NamedTemplate(s string) (*Template, error) {
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templates, err := templatesOnce()
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if err != nil {
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return nil, err
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}
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var template *Template
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score := math.MaxInt
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for _, t := range templates {
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if s := levenshtein.ComputeDistance(s, t.Template); s < score {
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score = s
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template = t
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}
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}
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if score < 100 {
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return template, nil
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}
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return nil, errors.New("no matching template found")
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}
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