3f5b3cdd98
* feat: add configurable SMTP HELO hostname Allow the SMTP HELO/EHLO hostname to be configured separately from the SMTP server hostname. This is useful when the SMTP server requires clients to identify themselves with a fully qualified hostname different from the server address. * chore: remove vendored dependency changes * Bump go-pkgz/notify to v1.4.0 and document SMTP_HELO_HOST The HELOHost field lands in go-pkgz/notify v1.4.0, so the branch needs the bump to compile; v1.3.0 in master has no such field. The example module is tidied alongside, as any change to backend/go.mod requires. Documents the parameter in the parameters table and, separately, in the email setup page: what it does, that leaving it unset keeps the previous `localhost` greeting, and the case it exists for, a relay refusing the greeting under Postfix `reject_non_fqdn_helo_hostname`. Also records the current limit: verification emails for email authentication go through go-pkgz/auth's own sender, which has no equivalent setting, so the greeting there is unchanged. * Bump go-pkgz/auth to v2.2.0 and apply SMTP_HELO_HOST to verification email The verification email sender had no way to set the greeting, so a relay that refuses the HELO would accept notifications and still reject sign-in emails. EmailParams gains HELOHost in go-pkgz/auth v2.2.0, so the same SMTP_HELO_HOST now drives both paths. The example module is tidied alongside, as any change to backend/go.mod requires. --------- Co-authored-by: oli <someone@somewhere.tld> Co-authored-by: Dmitry Verkhoturov <paskal.07@gmail.com>
35 lines
690 B
Go
35 lines
690 B
Go
package stats
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import "math"
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// Entropy provides calculation of the entropy
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func Entropy(input Float64Data) (float64, error) {
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input, err := normalize(input)
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if err != nil {
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return math.NaN(), err
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}
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var result float64
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for i := 0; i < input.Len(); i++ {
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v := input.Get(i)
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if v == 0 {
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continue
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}
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result += (v * math.Log(v))
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}
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return -result, nil
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}
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// normalize divides each value by the sum of all values,
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// leaving the input itself unchanged.
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func normalize(input Float64Data) (Float64Data, error) {
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sum, err := input.Sum()
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if err != nil {
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return Float64Data{}, err
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}
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c := copyslice(input)
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for i := 0; i < c.Len(); i++ {
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c[i] = c[i] / sum
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}
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return c, nil
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}
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