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7-day full-access trial, then gated behind an Ed25519-signed license key (internal/license) verified entirely offline — no phone-home dependency. Middleware 402s non-exempt API routes once the trial lapses with no valid key; frontend shows a countdown banner in the last 3 days and a blocking overlay once actually gated, both pointing at the new Settings -> Лицензия tab. tools/gen-license mints keys for the vendor side (never ships the private key).
56 lines
1.8 KiB
Go
56 lines
1.8 KiB
Go
package license
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import "time"
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// TrialDuration is deliberately not configurable — an owner who could
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// extend their own trial from Settings would defeat the point of having
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// one. Change this constant and rebuild if the vendor ever wants a
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// different trial length for a new release.
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const TrialDuration = 7 * 24 * time.Hour
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// Status is the outcome of checking a license key + trial window together —
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// exactly what a request-gating middleware and the Settings UI both need,
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// computed once so they can't disagree with each other.
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type Status struct {
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Licensed bool
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TrialActive bool
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TrialDaysLeft int
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Payload *Payload // nil unless Licensed
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}
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// Allowed is the actual gate condition: a valid license OR still inside the
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// trial window. Either one is sufficient.
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func (s Status) Allowed() bool {
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return s.Licensed || s.TrialActive
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}
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// Check combines a (possibly empty/invalid) stored license key with the
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// trial start timestamp into one Status. Never returns an error — an
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// invalid/expired/malformed key just means Licensed=false, falling back to
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// whatever the trial window says, same as no key at all.
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func Check(licenseKey string, trialStartedAt time.Time) Status {
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var s Status
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if licenseKey != "" {
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if p, err := Parse(licenseKey); err == nil && p.Valid() {
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s.Licensed = true
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s.Payload = p
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}
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}
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trialEnd := trialStartedAt.Add(TrialDuration)
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if remaining := time.Until(trialEnd); remaining > 0 {
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s.TrialActive = true
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// Ceiling division so "23 hours left" still reads as 1 day, not 0 —
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// an owner watching the countdown hit zero without a key entered
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// should never see it jump straight from 1 to a hard lock with no
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// "0 days left, expires today" warning in between.
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s.TrialDaysLeft = int(remaining / (24 * time.Hour))
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if remaining%(24*time.Hour) > 0 {
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s.TrialDaysLeft++
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}
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}
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return s
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}
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