pronounsfu/backend/routes/bot/bot.go

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2022-06-17 06:49:16 -07:00
package bot
import (
"crypto/ed25519"
"encoding/hex"
"encoding/json"
"fmt"
"net/http"
"os"
"codeberg.org/u1f320/pronouns.cc/backend/db"
"codeberg.org/u1f320/pronouns.cc/backend/log"
"codeberg.org/u1f320/pronouns.cc/backend/server"
"github.com/bwmarrin/discordgo"
"github.com/go-chi/chi/v5"
"github.com/go-chi/render"
)
type Bot struct {
*server.Server
publicKey ed25519.PublicKey
baseURL string
}
func Mount(srv *server.Server, r chi.Router) {
publicKey, err := hex.DecodeString(os.Getenv("DISCORD_PUBLIC_KEY"))
if err != nil {
return
}
b := &Bot{
Server: srv,
publicKey: publicKey,
baseURL: os.Getenv("BASE_URL"),
}
r.HandleFunc("/interactions", b.handle)
}
func (bot *Bot) handle(w http.ResponseWriter, r *http.Request) {
if !discordgo.VerifyInteraction(r, bot.publicKey) {
http.Error(w, "Forbidden", http.StatusForbidden)
return
}
var ev *discordgo.InteractionCreate
if err := json.NewDecoder(r.Body).Decode(&ev); err != nil {
http.Error(w, "Bad Request", http.StatusBadRequest)
}
// we can always respond to ping with pong
if ev.Type == discordgo.InteractionPing {
log.Debug("received ping interaction")
render.JSON(w, r, discordgo.InteractionResponse{
Type: discordgo.InteractionResponsePong,
})
return
}
if ev.Type != discordgo.InteractionApplicationCommand {
return
}
data := ev.ApplicationCommandData()
switch data.Name {
case "Show user's pronouns":
bot.userPronouns(w, r, ev)
case "Show author's pronouns":
}
}
func (bot *Bot) userPronouns(w http.ResponseWriter, r *http.Request, ev *discordgo.InteractionCreate) {
ctx := r.Context()
var du *discordgo.User
for _, user := range ev.ApplicationCommandData().Resolved.Users {
du = user
break
}
if du == nil {
return
}
u, err := bot.DB.DiscordUser(ctx, du.ID)
if err != nil {
if err == db.ErrUserNotFound {
respond(w, r, &discordgo.MessageEmbed{
Description: du.String() + " does not have any pronouns set.",
})
return
}
log.Errorf("getting discord user: %v", err)
return
}
avatarURL := du.AvatarURL("")
if len(u.AvatarURLs) > 0 {
avatarURL = u.AvatarURLs[0]
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}
name := u.Username
if u.DisplayName != nil {
name = fmt.Sprintf("%s (%s)", *u.DisplayName, u.Username)
}
url := bot.baseURL
if url != "" {
url += "/@" + u.Username
}
e := &discordgo.MessageEmbed{
Author: &discordgo.MessageEmbedAuthor{
Name: name,
IconURL: avatarURL,
URL: url,
},
}
if u.Bio != nil {
e.Fields = append(e.Fields, &discordgo.MessageEmbedField{
Name: "Bio",
Value: *u.Bio,
})
}
fields, err := bot.DB.UserFields(ctx, u.ID)
if err != nil {
respond(w, r, e)
log.Errorf("getting user fields: %v", err)
return
}
for _, field := range fields {
if len(field.Favourite) == 0 {
continue
}
var value string
for _, fav := range field.Favourite {
if len(value) > 500 {
break
}
value += fav + "\n"
}
e.Fields = append(e.Fields, &discordgo.MessageEmbedField{
Name: field.Name,
Value: value,
Inline: true,
})
}
respond(w, r, e)
}
func respond(w http.ResponseWriter, r *http.Request, embeds ...*discordgo.MessageEmbed) {
render.JSON(w, r, discordgo.InteractionResponse{
Type: discordgo.InteractionResponseChannelMessageWithSource,
Data: &discordgo.InteractionResponseData{
Embeds: embeds,
Flags: uint64(discordgo.MessageFlagsEphemeral),
},
})
}