46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
package txt
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import (
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"strings"
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)
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const (
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Empty = ""
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Space = " "
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Or = "|"
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And = "&"
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Plus = "+"
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SpacedPlus = Space + Plus + Space
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)
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// Spaced returns the string padded with a space left and right.
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func Spaced(s string) string {
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return Space + s + Space
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}
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// StripOr removes or operators from a query.
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func StripOr(s string) string {
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s = strings.ReplaceAll(s, Or, Space)
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return s
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}
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// NormalizeQuery replaces search operator with default symbols.
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func NormalizeQuery(s string) string {
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s = strings.ToLower(Clip(s, ClipQuery))
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s = strings.ReplaceAll(s, Spaced(EnOr), Or)
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s = strings.ReplaceAll(s, Spaced(EnAnd), And)
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s = strings.ReplaceAll(s, Spaced(EnWith), And)
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s = strings.ReplaceAll(s, Spaced(EnIn), And)
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s = strings.ReplaceAll(s, Spaced(EnAt), And)
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s = strings.ReplaceAll(s, SpacedPlus, And)
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s = strings.ReplaceAll(s, "%", "*")
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return strings.Trim(s, "+&|_-=!@$%^(){}\\<>,.;: ")
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}
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// QueryTooShort tests if a search query is too short.
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func QueryTooShort(q string) bool {
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q = strings.Trim(q, "- '")
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return q != Empty && len(q) < 3 && IsLatin(q)
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}
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