42 lines
1.2 KiB
Go
42 lines
1.2 KiB
Go
package preferences
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import (
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"errors"
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"fmt"
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)
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const (
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gigabyte = int64(1) << 30
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maxConcurrentLimit = 10
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maxReservedGigabytes = 100000
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)
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var ErrInvalid = errors.New("invalid settings")
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type Preferences struct {
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MaxConcurrentDownloads int `json:"maxConcurrentDownloads"`
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MinFreeGB int `json:"minFreeGB"`
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AllowedPorts []uint16 `json:"allowedPorts"`
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AutoExtract bool `json:"autoExtract"`
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CleanupAfterMove bool `json:"cleanupAfterMove"`
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}
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func (preferences Preferences) MinFreeBytes() int64 {
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return int64(preferences.MinFreeGB) * gigabyte
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}
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func (preferences Preferences) Validate() error {
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if preferences.MaxConcurrentDownloads < 1 || preferences.MaxConcurrentDownloads > maxConcurrentLimit {
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return fmt.Errorf("%w: parallel downloads must be between 1 and %d", ErrInvalid, maxConcurrentLimit)
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}
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if preferences.MinFreeGB < 0 || preferences.MinFreeGB > maxReservedGigabytes {
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return fmt.Errorf("%w: free space to keep must be between 0 and %d GB", ErrInvalid, maxReservedGigabytes)
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}
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for _, port := range preferences.AllowedPorts {
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if port == 0 {
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return fmt.Errorf("%w: port 0 is not allowed", ErrInvalid)
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}
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}
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return nil
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}
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