30 lines
728 B
Go
30 lines
728 B
Go
package rules
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import "strings"
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// WhitelistRule accepts emails from configured senders.
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// An empty list accepts all senders.
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type WhitelistRule struct {
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emails map[string]bool
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}
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// NewWhitelistRule creates a whitelist rule from a list of email addresses.
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func NewWhitelistRule(emails []string) *WhitelistRule {
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m := make(map[string]bool, len(emails))
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for _, e := range emails {
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m[strings.ToLower(e)] = true
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}
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return &WhitelistRule{emails: m}
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}
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func (r *WhitelistRule) Name() string { return "whitelist" }
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func (r *WhitelistRule) Evaluate(ctx EmailContext) RuleResult {
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if len(r.emails) == 0 {
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return Accept()
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}
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if r.emails[strings.ToLower(ctx.Sender)] {
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return Accept()
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}
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return Reject("not whitelisted")
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} |