rough skeleton and basic user authentication

ttv/auth.go

@@ -0,0 +1,78 @@
+package ttv
+
+import (
+	"context"
+	"errors"
+
+	"github.com/adeithe/go-twitch/api"
+	"zomo.dev/largehadroncollider/db"
+	"zomo.dev/largehadroncollider/util"
+)
+
+// sign in to twitch with each saved tokens
+
+func initAuth(conf *util.Config, dbConn *db.DBConn) (*TwitchAuth, error) {
+	ctx := context.Background()
+	
+	tokens, err := getTokensFromDB(dbConn)
+	if err != nil {
+		return nil, err
+	}
+
+	client := api.New(conf.ClientID)
+
+	accounts, err := testTokens(ctx, client, tokens)
+	if err != nil {
+		return nil, err
+	}
+
+	return &TwitchAuth{ ctx, client, accounts }, nil
+}
+
+type TwitchAuth struct {
+	Ctx context.Context
+	Client *api.Client
+	Accounts []TwitchAuthAccount
+}
+
+type TwitchAuthAccount struct {
+	api.User
+	Token string
+}
+
+func getTokensFromDB(dbConn *db.DBConn) ([]string, error) {
+	// TODO db cold
+	return []string{}, nil
+}
+
+func testTokens(ctx context.Context, client *api.Client, tokens []string) ([]TwitchAuthAccount, error) {
+	accounts := make([]TwitchAuthAccount, 0)
+	for _, token := range tokens {
+		account, err := testToken(ctx, client, token)
+		if err != nil {
+			return nil, err
+		}
+		accounts = append(accounts, account)
+	}
+	return accounts, nil
+}
+
+func testToken(ctx context.Context, client *api.Client, token string) (TwitchAuthAccount, error) {
+	users, err := client.Users.List().Do(ctx, api.WithBearerToken(token))
+	if err != nil {
+		return TwitchAuthAccount{}, err
+	}
+
+	usersData := users.Data
+
+	if len(usersData) <= 0 {
+		return TwitchAuthAccount{}, errors.New("user data returned an empty array")
+	}
+
+	mainUser := usersData[0]
+
+	return TwitchAuthAccount{
+		mainUser,
+		token,
+	}, nil
+}