f69cb38249
Support for handling username collisions between remote clusters. Users belonging to remote clusters have their username changed to include the remote name e.g. wiggin becomes wiggin:mattermost. @mentions are also modified so the munged username is replaced with the original username when the post is sync'd with the remote the user belongs to. When adding remote users: - append the remote name to the username with colon separator - append the remote name to the email address with colon separator - store the original username and email address in user props - when resolving @mentions replace with the stored original username
67 строки
2.0 KiB
Go
67 строки
2.0 KiB
Go
// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
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// See LICENSE.txt for license information.
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package sharedchannel
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import (
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"fmt"
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"strings"
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"github.com/mattermost/mattermost-server/v5/model"
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)
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// mungUsername creates a new username by combining username and remote cluster name, plus
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// a suffix to create uniqueness. If the resulting username exceeds the max length then
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// it is truncated and ellipses added.
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func mungUsername(username string, remotename string, suffix string, maxLen int) string {
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if suffix != "" {
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suffix = "~" + suffix
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}
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// If the username already contains a colon then another server already munged it.
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// In that case we can split on the colon and use the existing remote name.
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// We still need to re-mung with suffix in case of collision.
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comps := strings.Split(username, ":")
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if len(comps) >= 2 {
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username = comps[0]
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remotename = strings.Join(comps[1:], "")
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}
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var userEllipses string
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var remoteEllipses string
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// The remotename is allowed to use up to half the maxLen, and the username gets the remaining space.
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// Username might have a suffix to account for, and remotename always has a preceding colon.
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half := maxLen / 2
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// If the remotename is less than half the maxLen, then the left over space can be given to
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// the username.
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extra := half - (len(remotename) + 1)
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if extra < 0 {
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extra = 0
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}
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truncUser := (len(username) + len(suffix)) - (half + extra)
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if truncUser > 0 {
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username = username[:len(username)-truncUser-3]
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userEllipses = "..."
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}
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truncRemote := (len(remotename) + 1) - (maxLen - (len(username) + len(userEllipses) + len(suffix)))
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if truncRemote > 0 {
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remotename = remotename[:len(remotename)-truncRemote-3]
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remoteEllipses = "..."
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}
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return fmt.Sprintf("%s%s%s:%s%s", username, suffix, userEllipses, remotename, remoteEllipses)
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}
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// mungEmail creates a unique email address using a UID and remote name.
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func mungEmail(remotename string, maxLen int) string {
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s := fmt.Sprintf("%s@%s", model.NewId(), remotename)
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if len(s) > maxLen {
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s = s[:maxLen]
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}
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return s
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}
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