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44 lines
997 B
44 lines
997 B
3 years ago
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/*
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* Copyright © 2020-2021 A Bunch Tell LLC.
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*
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* This file is part of WriteFreely.
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*
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* WriteFreely is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, included
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* in the LICENSE file in this source code package.
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*/
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package spam
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import (
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"github.com/writeas/web-core/id"
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"strings"
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)
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var honeypotField string
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func HoneypotFieldName() string {
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if honeypotField == "" {
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honeypotField = id.Generate62RandomString(39)
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}
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return honeypotField
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}
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// CleanEmail takes an email address and strips it down to a unique address that can be blocked.
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func CleanEmail(email string) string {
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emailParts := strings.Split(strings.ToLower(email), "@")
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if len(emailParts) < 2 {
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return ""
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}
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u := emailParts[0]
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d := emailParts[1]
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// Ignore anything after '+'
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plusIdx := strings.IndexRune(u, '+')
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if plusIdx > -1 {
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u = u[:plusIdx]
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}
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// Strip dots in email address
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u = strings.ReplaceAll(u, ".", "")
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return u + "@" + d
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}
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