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package handlers
import (
"bytes"
"context"
"crypto/ed25519"
"encoding/hex"
"encoding/json"
"fmt"
"os"
"github.com/google/uuid"
"github.com/NdoleStudio/httpsms/pkg/repositories"
"github.com/NdoleStudio/httpsms/pkg/requests"
"github.com/NdoleStudio/httpsms/pkg/services"
"github.com/NdoleStudio/httpsms/pkg/telemetry"
"github.com/NdoleStudio/httpsms/pkg/validators"
"github.com/davecgh/go-spew/spew"
"github.com/gofiber/fiber/v3"
"github.com/palantir/stacktrace"
)
// DiscordHandler handles discord events
type DiscordHandler struct {
handler
logger telemetry.Logger
tracer telemetry.Tracer
billingService *services.BillingService
messageValidator *validators.MessageHandlerValidator
validator *validators.DiscordHandlerValidator
service *services.DiscordService
messageService *services.MessageService
}
// NewDiscordHandler creates a new DiscordHandler
func NewDiscordHandler(
logger telemetry.Logger,
tracer telemetry.Tracer,
validator *validators.DiscordHandlerValidator,
service *services.DiscordService,
messageService *services.MessageService,
billingService *services.BillingService,
messageValidator *validators.MessageHandlerValidator,
) (h *DiscordHandler) {
return &DiscordHandler{
logger: logger.WithService(fmt.Sprintf("%T", h)),
tracer: tracer,
validator: validator,
service: service,
messageService: messageService,
billingService: billingService,
messageValidator: messageValidator,
}
}
// RegisterRoutes registers the routes for the MessageHandler
func (h *DiscordHandler) RegisterRoutes(app *fiber.App, authMiddleware fiber.Handler, middlewares ...fiber.Handler) {
router := app.Group("discord")
h.register(router, fiber.MethodPost, "/event", middlewares, h.Event)
authRouter := app.Group("v1/discord-integrations")
h.register(authRouter, fiber.MethodPost, "/", append(middlewares, authMiddleware), h.Store)
h.register(authRouter, fiber.MethodGet, "/", append(middlewares, authMiddleware), h.Index)
h.register(authRouter, fiber.MethodDelete, "/:discordID", append(middlewares, authMiddleware), h.Delete)
h.register(authRouter, fiber.MethodPut, "/:discordID", append(middlewares, authMiddleware), h.Update)
}
// Index returns the discord integrations of a user
// @Summary Get discord integrations of a user
// @Description Get the discord integrations of a user
// @Security ApiKeyAuth
// @Tags DiscordIntegration
// @Accept json
// @Produce json
// @Param skip query int false "number of discord integrations to skip" minimum(0)
// @Param query query string false "filter discord integrations containing query"
// @Param limit query int false "number of discord integrations to return" minimum(1) maximum(20)
// @Success 200 {object} responses.DiscordsResponse
// @Failure 400 {object} responses.BadRequest
// @Failure 401 {object} responses.Unauthorized
// @Failure 422 {object} responses.UnprocessableEntity
// @Failure 500 {object} responses.InternalServerError
// @Router /discord-integrations [get]
func (h *DiscordHandler) Index(c fiber.Ctx) error {
ctx, span, ctxLogger := h.tracer.StartFromFiberCtxWithLogger(c, h.logger)
defer span.End()
var request requests.DiscordIndex
if err := c.Bind().Query(&request); err != nil {
msg := fmt.Sprintf("cannot marshall URL [%s] into %T", c.OriginalURL(), request)
ctxLogger.Warn(stacktrace.Propagate(err, msg))
return h.responseBadRequest(c, err)
}
if errors := h.validator.ValidateIndex(ctx, request.Sanitize()); len(errors) != 0 {
msg := fmt.Sprintf("validation errors [%s], while fetching discord integrations [%+#v]", spew.Sdump(errors), request)
ctxLogger.Warn(stacktrace.NewError(msg))
return h.responseUnprocessableEntity(c, errors, "validation errors while fetching discord integrations")
}
discordIntegrations, err := h.service.Index(ctx, h.userIDFomContext(c), request.ToIndexParams())
if err != nil {
msg := fmt.Sprintf("cannot get discord integrations with params [%+#v]", request)
ctxLogger.Error(stacktrace.Propagate(err, msg))
return h.responseInternalServerError(c)
}
return h.responseOK(c, fmt.Sprintf("fetched %d discord %s", len(discordIntegrations), h.pluralize("integration", len(discordIntegrations))), discordIntegrations)
}
// Delete a discord integration
// @Summary Delete discord integration
// @Description Delete a discord integration for a user
// @Security ApiKeyAuth
// @Tags Webhooks
// @Accept json
// @Produce json
// @Param discordID path string true "ID of the discord integration" default(32343a19-da5e-4b1b-a767-3298a73703ca)
// @Success 204 {object} responses.NoContent
// @Failure 400 {object} responses.BadRequest
// @Failure 401 {object} responses.Unauthorized
// @Failure 422 {object} responses.UnprocessableEntity
// @Failure 500 {object} responses.InternalServerError
// @Router /discord-integrations/{discordID} [delete]
func (h *DiscordHandler) Delete(c fiber.Ctx) error {
ctx, span, ctxLogger := h.tracer.StartFromFiberCtxWithLogger(c, h.logger)
defer span.End()
discordID := c.Params("discordID")
if errors := h.validator.ValidateUUID(discordID, "discordID"); len(errors) != 0 {
msg := fmt.Sprintf("validation errors [%s], while deleting discord integration with ID [%s]", spew.Sdump(errors), discordID)
ctxLogger.Warn(stacktrace.NewError(msg))
return h.responseUnprocessableEntity(c, errors, "validation errors while deleting discord integration")
}
err := h.service.Delete(ctx, h.userIDFomContext(c), uuid.MustParse(discordID))
if err != nil {
msg := fmt.Sprintf("cannot delete discord integration with ID [%+#v]", discordID)
ctxLogger.Error(stacktrace.Propagate(err, msg))
return h.responseInternalServerError(c)
}
return h.responseOK(c, "discord integration deleted successfully", nil)
}
// Update an entities.Discord
// @Summary Update a discord integration
// @Description Update a discord integration for the currently authenticated user
// @Security ApiKeyAuth
// @Tags DiscordIntegration
// @Accept json
// @Produce json
// @Param discordID path string true "ID of the discord integration" default(32343a19-da5e-4b1b-a767-3298a73703ca)
// @Param payload body requests.DiscordUpdate true "Payload of discord integration to update"
// @Success 200 {object} responses.DiscordResponse
// @Failure 400 {object} responses.BadRequest
// @Failure 401 {object} responses.Unauthorized
// @Failure 422 {object} responses.UnprocessableEntity
// @Failure 500 {object} responses.InternalServerError
// @Router /discord-integrations/{discordID} [put]
func (h *DiscordHandler) Update(c fiber.Ctx) error {
ctx, span, ctxLogger := h.tracer.StartFromFiberCtxWithLogger(c, h.logger)
defer span.End()
var request requests.DiscordUpdate
if err := c.Bind().Body(&request); err != nil {
msg := fmt.Sprintf("cannot marshall params [%s] into [%T]", c.Body(), request)
ctxLogger.Warn(stacktrace.Propagate(err, msg))
return h.responseBadRequest(c, err)
}
request.DiscordID = c.Params("discordID")
if errors := h.validator.ValidateUpdate(ctx, request.Sanitize()); len(errors) != 0 {
msg := fmt.Sprintf("validation errors [%s], while updating user [%+#v]", spew.Sdump(errors), request)
ctxLogger.Warn(stacktrace.NewError(msg))
return h.responseUnprocessableEntity(c, errors, "validation errors while updating discord integration")
}
user, err := h.service.Update(ctx, request.ToUpdateParams(h.userFromContext(c)))
if err != nil {
msg := fmt.Sprintf("cannot update discord integration with params [%+#v]", request)
ctxLogger.Error(stacktrace.Propagate(err, msg))
return h.responseInternalServerError(c)
}
return h.responseOK(c, "discord integration updated successfully", user)
}
// Store an entities.Discord
// @Summary Store discord integration
// @Description Store a discord integration for the authenticated user
// @Security ApiKeyAuth
// @Tags DiscordIntegration
// @Accept json
// @Produce json
// @Param payload body requests.DiscordStore true "Payload of the discord integration request"
// @Success 201 {object} responses.DiscordResponse
// @Failure 400 {object} responses.BadRequest
// @Failure 401 {object} responses.Unauthorized
// @Failure 422 {object} responses.UnprocessableEntity
// @Failure 500 {object} responses.InternalServerError
// @Router /discord-integrations [post]
func (h *DiscordHandler) Store(c fiber.Ctx) error {
ctx, span := h.tracer.StartFromFiberCtx(c)
defer span.End()
ctxLogger := h.tracer.CtxLogger(h.logger, span)
var request requests.DiscordStore
if err := c.Bind().Body(&request); err != nil {
msg := fmt.Sprintf("cannot marshall body [%s] into [%T]", c.Body(), request)
ctxLogger.Warn(stacktrace.Propagate(err, msg))
return h.responseBadRequest(c, err)
}
if errors := h.validator.ValidateStore(ctx, request.Sanitize()); len(errors) != 0 {
msg := fmt.Sprintf("validation errors [%s], while storing discord integration [%+#v]", spew.Sdump(errors), request)
ctxLogger.Warn(stacktrace.NewError(msg))
return h.responseUnprocessableEntity(c, errors, "validation errors while storing discord integration")
}
discordIntegrations, err := h.service.Index(ctx, h.userIDFomContext(c), repositories.IndexParams{Skip: 0, Limit: 1})
if err != nil {
ctxLogger.Error(stacktrace.Propagate(err, fmt.Sprintf("cannot index discord integrations for user [%s]", h.userIDFomContext(c))))
return h.responseInternalServerError(c)
}
if len(discordIntegrations) > 0 {
ctxLogger.Warn(stacktrace.NewError(fmt.Sprintf("user with ID [%s] wants to create more than 1 discord integration", h.userIDFomContext(c))))
return h.responsePaymentRequired(c, "You can't create more than 1 discord integration contact us to upgrade your account.")
}
discordIntegration, err := h.service.Store(ctx, request.ToStoreParams(h.userFromContext(c)))
if err != nil {
msg := fmt.Sprintf("cannot store discord integration with params [%+#v]", request)
ctxLogger.Error(stacktrace.Propagate(err, msg))
return h.responseInternalServerError(c)
}
return h.responseCreated(c, "discord integration created successfully", discordIntegration)
}
// Event consumes a discord event
// @Summary Consume a discord event
// @Description Publish a discord event to the registered listeners
// @Tags Discord
// @Accept json
// @Produce json
// @Success 204 {object} responses.NoContent
// @Failure 400 {object} responses.BadRequest
// @Failure 401 {object} responses.Unauthorized
// @Failure 422 {object} responses.UnprocessableEntity
// @Failure 500 {object} responses.InternalServerError
// @Router /discord/event [post]
func (h *DiscordHandler) Event(c fiber.Ctx) error {
ctx, span, ctxLogger := h.tracer.StartFromFiberCtxWithLogger(c, h.logger)
defer span.End()
if verified := h.verifyInteraction(ctxLogger, c); !verified {
return h.responseUnauthorized(c)
}
var payload map[string]any
if err := json.Unmarshal(c.Body(), &payload); err != nil {
msg := fmt.Sprintf("cannot unmarshall [%s] to [%T]", string(c.Body()), payload)
ctxLogger.Error(h.tracer.WrapErrorSpan(span, stacktrace.Propagate(err, msg)))
return h.responseBadRequest(c, err)
}
ctxLogger.Info(string(c.Body()))
if payload["type"].(float64) == 1 {
return c.JSON(fiber.Map{"type": 1})
}
if payload["type"].(float64) == 2 {
return h.sendSMS(ctx, c, payload)
}
return h.responseBadRequest(c, stacktrace.NewError(fmt.Sprintf("unknown type [%d]", payload["type"])))
}
func (h *DiscordHandler) createRequest(payload map[string]any) requests.MessageSend {
getOption := func(name string) string {
for _, option := range payload["data"].(map[string]any)["options"].([]any) {
if option.(map[string]any)["name"].(string) == name {
return option.(map[string]any)["value"].(string)
}
}
return ""
}
return requests.MessageSend{
From: getOption("from"),
To: getOption("to"),
Content: getOption("message"),
}
}
func (h *DiscordHandler) sendSMS(ctx context.Context, c fiber.Ctx, payload map[string]any) error {
_, span, ctxLogger := h.tracer.StartWithLogger(ctx, h.logger)
defer span.End()
discord, err := h.service.GetByServerID(ctx, payload["guild_id"].(string))
if err != nil {
msg := fmt.Sprintf("cannot get discord integration by server ID [%s]", payload["guild_id"].(string))
ctxLogger.Error(h.tracer.WrapErrorSpan(span, stacktrace.Propagate(err, msg)))
return c.JSON(
fiber.Map{
"type": 4,
"data": fiber.Map{
"content": "**⚠️ error while sending message**",
"embeds": []fiber.Map{
{
"title": "We cannot find the link to your discord server to an account on [httpsms.com](https://httpsms.com/settings).",
"color": 14681092,
},
},
},
},
)
}
request := h.createRequest(payload)
messageEmbed := fiber.Map{
"fields": []fiber.Map{
{
"name": "From:",
"value": request.From,
"inline": true,
},
{
"name": "To:",
"value": request.To,
"inline": true,
},
{
"name": "Content:",
"value": request.Content,
},
},
}
if errors := h.messageValidator.ValidateMessageSend(ctx, discord.UserID, request.Sanitize()); len(errors) != 0 {
msg := fmt.Sprintf("validation errors [%s], while sending payload [%s]", spew.Sdump(errors), c.Body())
ctxLogger.Warn(stacktrace.NewError(msg))
var embeds []fiber.Map
for _, value := range errors {
embeds = append(embeds, fiber.Map{
"title": value[0],
"color": 14681092,
})
}
return c.JSON(
fiber.Map{
"type": 4,
"data": fiber.Map{
"content": "**⚠️ error while sending message**",
"embeds": append(embeds, messageEmbed),
},
},
)
}
if msg := h.billingService.IsEntitled(ctx, discord.UserID); msg != nil {
ctxLogger.Warn(stacktrace.NewError(fmt.Sprintf("user with ID [%s] can't send a message", discord.UserID)))
return c.JSON(
fiber.Map{
"type": 4,
"data": fiber.Map{
"content": "**⚠️ error while sending message**",
"embeds": append([]fiber.Map{
{
"title": msg,
"color": 14681092,
},
}, messageEmbed),
},
},
)
}
message, err := h.messageService.SendMessage(ctx, request.ToMessageSendParams(discord.UserID, c.OriginalURL()))
if err != nil {
msg := fmt.Sprintf("cannot send message with paylod [%s] from discord server [%s]", c.Body(), discord.ServerID)
ctxLogger.Error(stacktrace.Propagate(err, msg))
return c.JSON(
fiber.Map{
"type": 4,
"data": fiber.Map{
"content": "**Could not send the message⚠️**",
"embeds": append([]fiber.Map{
{
"title": "Internal server error while sending SMS. Please try again later or contact support.",
"color": 14681092,
},
}, messageEmbed),
},
},
)
}
messageEmbed["fields"] = append(messageEmbed["fields"].([]fiber.Map), fiber.Map{
"name": "MessageID:",
"value": message.ID,
})
return c.JSON(
fiber.Map{
"type": 4,
"data": fiber.Map{
"content": "✔ sending sms",
"embeds": []fiber.Map{messageEmbed},
},
},
)
}
// verifyInteraction implements message verification of the discord interactions api
// signing algorithm, as documented here:
// https://discord.com/developers/docs/interactions/receiving-and-responding#security-and-authorization
func (h *DiscordHandler) verifyInteraction(ctxLogger telemetry.Logger, c fiber.Ctx) bool {
var msg bytes.Buffer
signature := c.Get("X-Signature-Ed25519")
if signature == "" {
ctxLogger.Info("X-Signature-Ed25519 header is empty")
return false
}
sig, err := hex.DecodeString(signature)
if err != nil {
ctxLogger.Info(fmt.Sprintf("cannot decode X-Signature-Ed25519 [%s]", signature))
return false
}
if len(sig) != ed25519.SignatureSize {
ctxLogger.Info(fmt.Sprintf("invalid signature size [%d]", len(sig)))
return false
}
timestamp := c.Get("X-Signature-Timestamp")
if timestamp == "" {
ctxLogger.Info("X-Signature-Timestamp header is empty")
return false
}
msg.WriteString(timestamp)
msg.Write(c.Body())
key, err := hex.DecodeString(os.Getenv("DISCORD_PUBLIC_KEY"))
if err != nil {
ctxLogger.Error(stacktrace.Propagate(err, "cannot decode DISCORD_PUBLIC_KEY env variable [%s]", os.Getenv("DISCORD_PUBLIC_KEY")))
return false
}
return ed25519.Verify(key, msg.Bytes(), sig)
}