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// Eventually this should be removed. Currently it gives backwards compatability to old
// versions that did not store the query count, which is now used for autocomplete.
package fuzzy
import (
"encoding/json"
"os"
)
type OldModel struct {
Data map[string]int `json:"data"`
Maxcount int `json:"maxcount"`
Suggest map[string][]string `json:"suggest"`
Depth int `json:"depth"`
Threshold int `json:"threshold"`
UseAutocomplete bool `json:"autocomplete"`
}
// Converts the old model format to the new version
func (model *Model) convertOldFormat(filename string) error {
oldmodel := new(OldModel)
f, err := os.Open(filename)
if err != nil {
return err
}
defer f.Close()
d := json.NewDecoder(f)
err = d.Decode(oldmodel)
if err != nil {
return err
}
// Correct for old models pre divergence measure
if model.SuffDivergenceThreshold == 0 {
model.SuffDivergenceThreshold = SuffDivergenceThresholdDefault
}
// Convert fields
model.Maxcount = oldmodel.Maxcount
model.Suggest = oldmodel.Suggest
model.Depth = oldmodel.Depth
model.Threshold = oldmodel.Threshold
model.UseAutocomplete = oldmodel.UseAutocomplete
// Convert the old counts
if len(oldmodel.Data) > 0 {
model.Data = make(map[string]*Counts, len(oldmodel.Data))
for term, cc := range oldmodel.Data {
model.Data[term] = &Counts{cc, 0}
}
}
return nil
}
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