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Use discordgo's permission calculator

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This commit is contained in:
Tulir Asokan
2023-01-29 14:58:58 +02:00
parent d78d4c4da5
commit 840e95b388
3 changed files with 15 additions and 43 deletions
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52
discord.go
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@@ -1,29 +1,23 @@
package main
import (
"encoding/json"
"errors"
"github.com/bwmarrin/discordgo"
)
func ptrBool(val bool) *bool {
return &val
}
func (user *User) channelIsBridgeable(channel *discordgo.Channel) bool {
switch channel.Type {
case discordgo.ChannelTypeGuildText, discordgo.ChannelTypeGuildNews:
// allowed
case discordgo.ChannelTypeDM, discordgo.ChannelTypeGroupDM:
// DMs are always bridgeable, no need for permission checks
return true
default:
// everything else is not allowed
return false
}
hasRole := map[string]bool{
channel.GuildID: true,
}
var roles []string
member, err := user.Session.State.Member(channel.GuildID, user.DiscordID)
if errors.Is(err, discordgo.ErrStateNotFound) {
user.log.Debugfln("Fetching own membership in %s to check own roles", channel.GuildID)
@@ -39,37 +33,15 @@ func (user *User) channelIsBridgeable(channel *discordgo.Channel) bool {
} else if err != nil {
user.log.Warnfln("Failed to get own membership in %s from cache to determine own roles for bridging %s: %v", channel.GuildID, channel.ID, err)
}
if member != nil {
roles = member.Roles
for _, role := range member.Roles {
hasRole[role] = true
}
err = user.Session.State.ChannelAdd(channel)
if err != nil {
user.log.Warnfln("Failed to add channel %s/%s to cache: %v", channel.GuildID, channel.ID, err)
}
var userAllowed, roleAllowed *bool
for _, override := range channel.PermissionOverwrites {
if override.Type == discordgo.PermissionOverwriteTypeMember && override.ID == user.DiscordID {
if override.Allow&discordgo.PermissionViewChannel > 0 {
userAllowed = ptrBool(true)
} else if override.Deny&discordgo.PermissionViewChannel > 0 {
userAllowed = ptrBool(false)
}
} else if override.Type == discordgo.PermissionOverwriteTypeRole && hasRole[override.ID] {
if override.Allow&discordgo.PermissionViewChannel > 0 {
roleAllowed = ptrBool(true)
} else if override.Deny&discordgo.PermissionViewChannel > 0 {
roleAllowed = ptrBool(false)
}
}
perms, err := user.Session.State.UserChannelPermissions(user.DiscordID, channel.ID)
if err != nil {
user.log.Warnfln("Failed to get permissions in %s/%s to determine if it's bridgeable: %v", channel.GuildID, channel.ID, err)
return true
}
allowed := true
if userAllowed != nil {
allowed = *userAllowed
} else if roleAllowed != nil {
allowed = *roleAllowed
}
if !allowed {
dat, _ := json.Marshal(channel.PermissionOverwrites)
user.log.Debugfln("Permission overwrites (%s) resulted in %s/%s not being allowed to bridge with roles %+v", dat, channel.GuildID, channel.ID, roles)
}
return allowed
user.log.Debugfln("Computed permissions in %s/%s: %d (view channel: %t)", channel.GuildID, channel.ID, perms, perms&discordgo.PermissionViewChannel > 0)
return perms&discordgo.PermissionViewChannel > 0
}