Carlos Florêncio
61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
package sessioncapacity
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import (
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"os"
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"strconv"
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"strings"
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)
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// ReadEnvironment captures the process environment value and whether the
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// variable exists. Presence is separate because an explicitly blank value is
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// different from an unset variable while resolving diagnostics.
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func ReadEnvironment() Environment {
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value, present := os.LookupEnv(EnvironmentVariable)
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return Environment{Value: value, Present: present}
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}
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// Resolve applies the precedence environment > saved setting > default.
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// Invalid nonblank environment values are ignored and reported in the result.
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func Resolve(configured *Settings, environment Environment) (Resolution, error) {
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settings := DefaultSettings()
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source := SourceDefault
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if configured != nil {
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if err := Validate(*configured); err != nil {
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return Resolution{}, err
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}
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settings = *configured
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source = SourceSetting
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}
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resolution := Resolution{Response: Response{
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Settings: settings,
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Effective: effectiveFor(settings, source),
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}}
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raw := strings.TrimSpace(environment.Value)
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if !environment.Present || raw == "" {
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return resolution, nil
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}
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value, err := strconv.ParseInt(raw, 10, 64)
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if err != nil || value < 0 || value > maxSessionsLimit {
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resolution.InvalidEnvironment = true
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return resolution, nil
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}
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resolution.Effective = Effective{
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Enabled: value > 0,
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MaxSessions: int(value),
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Source: SourceEnvironment,
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Locked: true,
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}
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return resolution, nil
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}
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func effectiveFor(settings Settings, source Source) Effective {
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effective := Effective{Source: source}
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if settings.Enabled {
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effective.Enabled = true
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effective.MaxSessions = settings.MaxSessions
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}
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return effective
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}
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