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89 lines
1.5 KiB
89 lines
1.5 KiB
package obj
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import (
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"fmt"
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"net/url"
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"strings"
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"time"
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)
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type QURL struct {
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ID uint64
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URL string
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Created time.Time
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IP []byte
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Browser string
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}
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func (q *QURL) CheckValid() error {
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if q == nil {
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return fmt.Errorf("QURL is nil")
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}
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if q.URL == "" {
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return fmt.Errorf("URL may not be empty")
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}
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u, err := url.Parse(q.URL)
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if err != nil {
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return err
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}
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if u.Scheme == "" {
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return fmt.Errorf("URLs must begin with a scheme (e.g. https:)")
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}
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if u.Host == "" && u.RawQuery == "" && u.RawPath == "" && u.Fragment == "" {
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return fmt.Errorf("URLs must contain a path, host, query or fragment element")
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}
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if !u.IsAbs() {
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return fmt.Errorf("Relative URLs are not allowed")
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}
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return nil
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}
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const alpha = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
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const alphalen = uint64(len(alpha))
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func ToString(v uint64) string {
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var r strings.Builder
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var i uint64
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for i = v; i >= alphalen; i = (i / alphalen) - 1 {
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r.WriteByte(alpha[i%alphalen])
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}
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r.WriteByte(alpha[i])
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return r.String()
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}
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func FromString(s string) (uint64, error) {
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var r uint64
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vlen := uint64(len(s))
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for i := uint64(0); i < vlen; i++ {
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x := strings.IndexByte(alpha, s[i])
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if x == -1 {
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return 0, fmt.Errorf("Invalid character [%s]", s[i])
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}
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if i == 0 {
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r += uint64(x)
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} else {
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r += (uint64(x+1) * pow(alphalen, i))
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}
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}
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return r, nil
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}
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func pow(a, b uint64) uint64 {
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p := uint64(1)
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for b > 0 {
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if b&1 != 0 {
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p *= a
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}
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b >>= 1
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a *= a
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}
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return p
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}
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