/
utility.go
56 lines (47 loc) · 2.17 KB
/
utility.go
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/*
* Copyright 2018 Johannes Donath <johannesd@torchmind.com>
* and other copyright owners as documented in the project's IP log.
*
* 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 entity
import "time"
// defines the total amount of time a name can be safely associated with a given profile
const NameValidityPeriod = time.Hour * 24 * 37
// defines the total amount of time that has to pass before a user can choose a new name again
const NameChangeRateLimitPeriod = time.Hour * 24 * 30
// defines the date and time at which initial account names are set to expired
// this is set to the time of introduction (4th of January 2015) + 30 days (for safety we will not
// be using the full 37 grace period here)
var IntroductoryValidityPeriodEnd = time.Unix(1425600000, 0)
// calculates the beginning of a theoretical grace period
func CalculateNameGracePeriodBeginning(end time.Time) time.Time {
return end.Add(-NameValidityPeriod)
}
// calculates the end of a theoretical grace period
func CalculateNameGracePeriodEnd(start time.Time) time.Time {
if start.Unix() == 0 {
return IntroductoryValidityPeriodEnd
}
return start.Add(NameValidityPeriod)
}
// evaluates whether a given name association is still considered valid (e.g. no other user was able to claim the name
// since it was last encountered)
func IsNameAssociationValidAt(at time.Time, lastSeen time.Time) bool {
return at.Sub(lastSeen) < NameValidityPeriod
}
// evaluates whether a given name association is still considered valid (e.g. no other user was able to claim the name
// since it was last encountered)
func IsNameAssociationValid(lastSeen time.Time) bool {
return IsNameAssociationValidAt(time.Now(), lastSeen)
}