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56470e2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | // Copyright 2018 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"fmt"
"math/rand"
)
// CreateTrackingId generates a tracking ID.
func CreateTrackingId(salt string) string {
return fmt.Sprintf("%c%c-%d%s-%d%s",
getRandomLetterCode(),
getRandomLetterCode(),
len(salt),
getRandomNumber(3),
len(salt)/2,
getRandomNumber(7),
)
}
// getRandomLetterCode generates a code point value for a capital letter.
func getRandomLetterCode() uint32 {
return 65 + uint32(rand.Intn(25))
}
// getRandomNumber generates a string representation of a number with the requested number of digits.
func getRandomNumber(digits int) string {
str := ""
for i := 0; i < digits; i++ {
str = fmt.Sprintf("%s%d", str, rand.Intn(10))
}
return str
}
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