2022-03-28 21:22:34 +01:00
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package discord
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import (
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2022-09-08 14:48:36 +01:00
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"code.mrmelon54.com/melon/tools/utils"
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2022-03-28 21:22:34 +01:00
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"context"
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"embed"
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_ "embed"
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"fmt"
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"github.com/bwmarrin/discordgo"
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"github.com/google/uuid"
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"github.com/gorilla/mux"
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"golang.org/x/oauth2"
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"html/template"
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"net/http"
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"os"
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)
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var (
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//go:embed pages/index.go.html
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indexTemplate string
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//go:embed pages/assets/icon
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iconFiles embed.FS
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)
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type Module struct {
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sessionWrapper func(cb func(http.ResponseWriter, *http.Request, *utils.State)) func(rw http.ResponseWriter, req *http.Request)
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oauthClient *oauth2.Config
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}
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type discordKeyType int
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const (
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KeyOauthClient = discordKeyType(iota)
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KeyUser
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KeyState
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KeyAccessToken
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KeyRefreshToken
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)
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func New() *Module {
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return &Module{}
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}
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func (m *Module) GetName() string { return "Discord" }
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func (m *Module) GetEndpoint() string { return "/discord" }
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func (m *Module) SetupModule(router *mux.Router, f func(cb func(http.ResponseWriter, *http.Request, *utils.State)) func(rw http.ResponseWriter, req *http.Request)) {
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m.sessionWrapper = f
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m.oauthClient = &oauth2.Config{
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ClientID: os.Getenv("DISCORD_CLIENT_ID"),
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ClientSecret: os.Getenv("DISCORD_CLIENT_SECRET"),
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Scopes: []string{"identify", "guilds", "connections", "email"},
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Endpoint: oauth2.Endpoint{
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AuthURL: "https://discord.com/oauth2/authorize",
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TokenURL: "https://discord.com/api/oauth2/token",
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},
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RedirectURL: os.Getenv("DISCORD_REDIRECT_URL"),
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}
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router.HandleFunc("/", m.getClient(m.homepage))
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router.HandleFunc("/login", m.sessionWrapper(m.loginPage))
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router.PathPrefix("/assets/icon/{name}.svg").HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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vars := mux.Vars(req)
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b, err := iconFiles.ReadFile("pages/assets/icon/" + vars["name"] + ".svg")
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if err != nil {
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rw.WriteHeader(http.StatusNotFound)
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} else {
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rw.Header().Set("Content-Type", "image/svg+xml")
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rw.WriteHeader(http.StatusOK)
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_, _ = rw.Write(b)
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}
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})
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}
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func (m *Module) getClient(cb func(http.ResponseWriter, *http.Request, *utils.State, *discordgo.Session)) func(rw http.ResponseWriter, req *http.Request) {
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return m.sessionWrapper(func(rw http.ResponseWriter, req *http.Request, state *utils.State) {
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if v, ok := utils.GetStateValue[*discordgo.Session](state, KeyOauthClient); ok {
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cb(rw, req, state, v)
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return
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}
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http.Redirect(rw, req, "/discord/login", http.StatusTemporaryRedirect)
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})
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}
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2022-05-16 12:57:46 +01:00
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func (m *Module) homepage(rw http.ResponseWriter, _ *http.Request, state *utils.State, discordClient *discordgo.Session) {
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2022-03-28 21:22:34 +01:00
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myUser, err := discordClient.User("@me")
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if err != nil {
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state.Del(KeyOauthClient)
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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return
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}
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2022-07-09 18:46:17 +01:00
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myGuilds, err := discordClient.UserGuilds(200, "", "")
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2022-03-28 21:22:34 +01:00
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if err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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return
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}
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myConns, err := discordClient.UserConnections()
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if err != nil {
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http.Error(rw, err.Error(), http.StatusInternalServerError)
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return
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}
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tmp, err := template.New("homepage").Funcs(template.FuncMap{
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"checkFlag": func(a discordgo.UserFlags, b int) bool { return (int(a) & b) != 0 },
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"connectedLink": connectedLinkFunc,
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}).Parse(indexTemplate)
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if err != nil {
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fmt.Println("Template parse error:", err)
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return
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}
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2023-09-22 02:04:04 +01:00
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guildIcons := make([]string, len(myGuilds))
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2022-03-28 21:22:34 +01:00
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for i, j := range myGuilds {
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2022-05-16 13:08:44 +01:00
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var a discordgo.Guild
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a.ID = j.ID
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a.Icon = j.Icon
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2023-09-22 02:04:04 +01:00
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guildIcons[i] = a.IconURL()
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2022-03-28 21:22:34 +01:00
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}
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err = tmp.Execute(rw, struct {
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User *discordgo.User
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2022-03-29 23:12:26 +01:00
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UserAccent string
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2023-09-22 02:04:04 +01:00
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Avatar string
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Banner string
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2022-03-28 21:22:34 +01:00
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Guilds []*discordgo.UserGuild
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2023-09-22 02:04:04 +01:00
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GuildIcons []string
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2022-03-28 21:22:34 +01:00
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Connections []*discordgo.UserConnection
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}{
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User: myUser,
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2022-03-29 23:12:26 +01:00
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UserAccent: fmt.Sprintf("#%06x", myUser.AccentColor),
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2023-09-22 02:04:04 +01:00
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Avatar: myUser.AvatarURL("256"),
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Banner: myUser.BannerURL("256"),
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2022-03-28 21:22:34 +01:00
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Guilds: myGuilds,
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GuildIcons: guildIcons,
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Connections: myConns,
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})
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if err != nil {
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fmt.Println("Template execute error:", err)
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return
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}
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}
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func (m *Module) loginPage(rw http.ResponseWriter, req *http.Request, state *utils.State) {
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if myUser, ok := utils.GetStateValue[*string](state, KeyUser); ok {
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if myUser != nil {
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http.Redirect(rw, req, "/discord", http.StatusTemporaryRedirect)
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return
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}
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}
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if flowState, ok := utils.GetStateValue[uuid.UUID](state, KeyState); ok {
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q := req.URL.Query()
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if q.Has("code") && q.Has("state") {
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if q.Get("state") == flowState.String() {
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exchange, err := m.oauthClient.Exchange(context.Background(), q.Get("code"))
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if err != nil {
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fmt.Println("Exchange token error:", err)
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return
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}
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c, err := discordgo.New("Bearer " + exchange.AccessToken)
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if err != nil {
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fmt.Println("Create client error:", err)
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return
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}
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state.Put(KeyOauthClient, c)
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state.Put(KeyAccessToken, exchange.AccessToken)
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state.Put(KeyRefreshToken, exchange.RefreshToken)
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http.Redirect(rw, req, "/discord", http.StatusTemporaryRedirect)
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return
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}
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http.Error(rw, "OAuth flow state doesn't match\n", http.StatusBadRequest)
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return
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}
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}
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flowState := uuid.New()
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state.Put(KeyState, flowState)
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http.Redirect(rw, req, m.oauthClient.AuthCodeURL(flowState.String(), oauth2.AccessTypeOffline), http.StatusTemporaryRedirect)
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}
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func connectedLinkFunc(a *discordgo.UserConnection) string {
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switch a.Type {
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2023-09-22 02:04:04 +01:00
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case "domain":
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return "https://" + a.Name
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2022-03-28 21:22:34 +01:00
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case "github":
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return "https://github.com/" + a.Name
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case "reddit":
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return "https://www.reddit.com/u/" + a.Name
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case "spotify":
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return "https://open.spotify.com/user/" + a.ID
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case "steam":
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return "https://steamcommunity.com/profiles/" + a.ID
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case "twitch":
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return "https://www.twitch.tv/" + a.Name
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case "twitter":
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return "https://twitter.com/" + a.Name
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case "youtube":
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return "https://www.youtube.com/channel/" + a.ID
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}
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2023-09-22 02:04:04 +01:00
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return ""
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2022-03-28 21:22:34 +01:00
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}
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