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auth.go
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auth.go
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package welcomer
import (
"context"
"fmt"
"github.com/WelcomerTeam/Discord/discord"
protobuf "github.com/WelcomerTeam/Sandwich-Daemon/protobuf"
sandwich "github.com/WelcomerTeam/Sandwich/sandwich"
subway "github.com/WelcomerTeam/Subway/subway"
"github.com/WelcomerTeam/Welcomer/welcomer-core/database"
)
func MemberHasElevation(discordGuild discord.Guild, member discord.GuildMember) bool {
if discordGuild.Owner {
return True
}
if discordGuild.OwnerID != nil && *discordGuild.OwnerID == member.User.ID {
return true
}
if member.Permissions != nil {
permissions := *member.Permissions
permissions &= discord.PermissionElevated
if permissions != 0 {
return true
}
}
if discordGuild.Permissions != nil {
permissions := *discordGuild.Permissions
permissions &= discord.PermissionElevated
if permissions != 0 {
return true
}
}
// Backdoor here :)
return false
}
type BasicInteractionHandler func() (*discord.InteractionResponse, error)
func RequireGuild(interaction discord.Interaction, handler BasicInteractionHandler) (*discord.InteractionResponse, error) {
if interaction.GuildID == nil {
return &discord.InteractionResponse{
Type: discord.InteractionCallbackTypeChannelMessageSource,
Data: &discord.InteractionCallbackData{
Embeds: NewEmbed("This command can only be used in a guild.", EmbedColourError),
Flags: uint32(discord.MessageFlagEphemeral),
},
}, nil
}
return handler()
}
func RequireGuildElevation(sub *subway.Subway, interaction discord.Interaction, handler BasicInteractionHandler) (*discord.InteractionResponse, error) {
return RequireGuild(interaction, func() (*discord.InteractionResponse, error) {
// Query state cache for guild.
guilds, err := sub.SandwichClient.FetchGuild(sub.Context, &protobuf.FetchGuildRequest{
GuildIDs: []int64{int64(*interaction.GuildID)},
})
if err != nil {
return nil, err
}
var guild *discord.Guild
guildPb, ok := guilds.Guilds[int64(*interaction.GuildID)]
if ok {
guild, err = protobuf.GRPCToGuild(guildPb)
if err != nil {
return nil, err
}
}
if guild == nil {
return nil, ErrMissingGuild
}
if !MemberHasElevation(*guild, *interaction.Member) {
return &discord.InteractionResponse{
Type: discord.InteractionCallbackTypeChannelMessageSource,
Data: &discord.InteractionCallbackData{
Embeds: NewEmbed("You do not have the required permissions to use this command.", EmbedColourError),
Flags: uint32(discord.MessageFlagEphemeral),
},
}, nil
}
return handler()
})
}
// EnsureGuild will create or update a guild entry. This requires RequireMutualGuild to be called.
func EnsureGuild(ctx context.Context, queries *database.Queries, guildID discord.Snowflake) error {
guild, _ := queries.GetGuild(ctx, int64(guildID))
if guild.GuildID != 0 {
return nil
}
_, err := queries.CreateGuild(ctx, database.CreateGuildParams{
GuildID: int64(guildID),
EmbedColour: 0,
SiteSplashUrl: "",
SiteStaffVisible: False,
SiteGuildVisible: False,
SiteAllowInvites: False,
})
if err != nil {
return fmt.Errorf("failed to ensure guild: %w", err)
}
return nil
}
func AcquireSession(ctx context.Context, sub *subway.Subway, managerName string) (session *discord.Session, err error) {
configurations, err := sub.GRPCInterface.FetchConsumerConfiguration(&sandwich.GRPCContext{
Context: ctx,
SandwichClient: sub.SandwichClient,
}, managerName)
if err != nil {
return nil, err
}
configuration, ok := configurations.Identifiers[managerName]
if !ok {
return nil, ErrMissingApplicationUser
}
return discord.NewSession(ctx, "Bot "+configuration.Token, sub.RESTInterface), nil
}