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year.go
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year.go
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package search
import (
"fmt"
"strconv"
"time"
)
type YearVariable struct {
name string
}
func MakeYearVariable() Variable {
return YearVariable{name: "$Year"}
}
func (yv YearVariable) Name() string {
return yv.name
}
func (yv YearVariable) Match(token *TokenNode, variableToken *TokenNode, matchPrefixes bool, variables map[string]*Variable) (bool, []VariableValue, []*TokenNode, error) {
if year, err := strconv.ParseInt(token.Token.Token, 10, 64); err != nil {
return false, nil, nil, nil
} else if year > 1900 && year < 2100 {
// TODO: We should later add support for:
// 1. Multiple values! Which is possible, i.e., ambiguations.
// 2. Short yaer, i.e., [17]
// 3. Hebrew letters years.
// 4. Before and after era.
if match, values, tokensContinue, err := TokensSingleMatch(token.Children, variableToken.Children, matchPrefixes, variables); err != nil {
return false, nil, nil, err
} else {
values = append([]VariableValue{MakeVariableValue(
yv.name, // variable
token.OriginalTokenNodes[0].SkippedPrefixToString(), // prefix
token.OriginalTokenNodes[0].OriginalPhrase, // phrase
token.OriginalTokenNodes[0].SkippedSuffixToString(), // suffix
token.Token.Token, // token
fmt.Sprintf("%d", year), // value
)}, values...)
return match, values, tokensContinue, nil
}
}
return false, nil, nil, nil
}
func (yv YearVariable) VariableToPhrases(prefix, suffix string, variables map[string]*Variable) []*PhrasesWithOrigin {
ret := []*PhrasesWithOrigin(nil)
year := 1996
nowYear := time.Now().Year()
for year <= nowYear {
yearString := fmt.Sprintf("%d", year)
ret = append(ret, &PhrasesWithOrigin{[]VariableValue{
MakeVariableValue(
yv.name, // variable
prefix, // prefix
yearString, // phrase
suffix, // suffix
yearString, // token
yearString, // value
)}, nil, "", "", ""})
year++
}
return ret
}