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Copy pathbulk_message_handler.go
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186 lines (165 loc) · 6.55 KB
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package handlers
import (
"fmt"
"path/filepath"
"regexp"
"sync"
"sync/atomic"
"time"
"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"
)
// BulkMessageHandler handles bulk SMS http requests
type BulkMessageHandler struct {
handler
logger telemetry.Logger
tracer telemetry.Tracer
validator *validators.BulkMessageHandlerValidator
messageService *services.MessageService
billingService *services.BillingService
}
// NewBulkMessageHandler creates a new BulkMessageHandler
func NewBulkMessageHandler(
logger telemetry.Logger,
tracer telemetry.Tracer,
validator *validators.BulkMessageHandlerValidator,
billingService *services.BillingService,
messageService *services.MessageService,
) (h *BulkMessageHandler) {
return &BulkMessageHandler{
logger: logger.WithService(fmt.Sprintf("%T", h)),
tracer: tracer,
validator: validator,
messageService: messageService,
billingService: billingService,
}
}
// RegisterRoutes registers the routes for the MessageHandler
func (h *BulkMessageHandler) RegisterRoutes(router fiber.Router, middlewares ...fiber.Handler) {
h.register(router, fiber.MethodGet, "/v1/bulk-messages", middlewares, h.Index)
h.register(router, fiber.MethodPost, "/v1/bulk-messages", middlewares, h.Store)
}
// Index fetches the bulk message order history.
// @Summary List bulk message orders
// @Description Fetches the last 10 bulk message order summaries for the authenticated user showing counts per status.
// @Security ApiKeyAuth
// @Tags BulkSMS
// @Accept json
// @Produce json
// @Success 200 {object} responses.BulkMessagesResponse
// @Failure 401 {object} responses.Unauthorized
// @Failure 500 {object} responses.InternalServerError
// @Router /bulk-messages [get]
func (h *BulkMessageHandler) Index(c fiber.Ctx) error {
ctx, span, ctxLogger := h.tracer.StartFromFiberCtxWithLogger(c, h.logger)
defer span.End()
orders, err := h.messageService.GetBulkMessages(ctx, h.userIDFomContext(c))
if err != nil {
msg := fmt.Sprintf("cannot fetch bulk messages for user [%s]", h.userIDFomContext(c))
ctxLogger.Error(stacktrace.Propagate(err, msg))
return h.responseInternalServerError(c)
}
return h.responseOK(c, fmt.Sprintf("fetched %d bulk %s", len(orders), h.pluralize("message", len(orders))), orders)
}
// Store sends bulk SMS messages from a CSV or Excel file.
// @Summary Store bulk SMS file
// @Description Sends bulk SMS messages to multiple users based on our [CSV template](https://httpsms.com/templates/httpsms-bulk.csv) or our [Excel template](https://httpsms.com/templates/httpsms-bulk.xlsx).
// @Security ApiKeyAuth
// @Tags BulkSMS
// @Accept multipart/form-data
// @Produce json
// @Param document formData file true "The Excel or CSV file containing the messages to be sent."
// @Success 202 {object} responses.NoContent
// @Failure 400 {object} responses.BadRequest
// @Failure 401 {object} responses.Unauthorized
// @Failure 422 {object} responses.UnprocessableEntity
// @Failure 500 {object} responses.InternalServerError
// @Router /bulk-messages [post]
func (h *BulkMessageHandler) Store(c fiber.Ctx) error {
ctx, span, ctxLogger := h.tracer.StartFromFiberCtxWithLogger(c, h.logger)
defer span.End()
file, err := c.FormFile("document")
if err != nil {
msg := fmt.Sprintf("cannot fetch file with name [%s] from request", "document")
ctxLogger.Warn(stacktrace.Propagate(err, msg))
return h.responseBadRequest(c, err)
}
messages, userLocation, validationErrors := h.validator.ValidateStore(ctx, h.userIDFomContext(c), file)
if len(validationErrors) != 0 {
msg := fmt.Sprintf("validation errors [%s], while sending bulk sms from CSV file [%s] for [%s]", spew.Sdump(validationErrors), file.Filename, h.userIDFomContext(c))
ctxLogger.Warn(stacktrace.NewError(msg))
return h.responseUnprocessableEntity(c, validationErrors, "validation errors while sending bulk SMS")
}
if msg := h.billingService.IsEntitledWithCount(ctx, h.userIDFomContext(c), uint(len(messages))); msg != nil {
ctxLogger.Warn(stacktrace.NewError(fmt.Sprintf("user with ID [%s] is not entitled to send [%d] messages", h.userIDFomContext(c), len(messages))))
return h.responsePaymentRequired(c, *msg)
}
requestID := h.generateRequestID(file.Filename)
wg := sync.WaitGroup{}
count := atomic.Int64{}
// Compute per-phone index for rate-based dispatch delay
phoneIndexCounter := make(map[string]int)
for _, message := range messages {
wg.Add(1)
var perPhoneIndex int
if message.GetSendTime(userLocation) == nil {
perPhoneIndex = phoneIndexCounter[message.FromPhoneNumber]
phoneIndexCounter[message.FromPhoneNumber]++
}
go func(message *requests.BulkMessage, index int) {
count.Add(1)
_, err = h.messageService.SendMessage(
ctx,
message.ToMessageSendParams(h.userIDFomContext(c), requestID, c.OriginalURL(), index, userLocation),
)
if err != nil {
count.Add(-1)
msg := fmt.Sprintf("cannot send message with payload [%s] at index [%d]", spew.Sdump(message), index)
ctxLogger.Error(stacktrace.Propagate(err, msg))
}
wg.Done()
}(message, perPhoneIndex)
}
wg.Wait()
return h.responseAccepted(c, fmt.Sprintf("Added %d out of %d messages to the queue", count.Load(), len(messages)))
}
func (h *BulkMessageHandler) generateRequestID(filename string) string {
return fmt.Sprintf("bulk-%s-%s", encodeBase62(time.Now().UnixMilli()), truncateFilename(sanitizeFilename(filename), 32))
}
func sanitizeFilename(filename string) string {
return regexp.MustCompile(`[^a-zA-Z0-9.\-_: ]`).ReplaceAllString(filename, "")
}
func encodeBase62(n int64) string {
const charset = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
if n == 0 {
return "0"
}
result := make([]byte, 0, 8)
for n > 0 {
result = append(result, charset[n%62])
n /= 62
}
// reverse
for i, j := 0, len(result)-1; i < j; i, j = i+1, j-1 {
result[i], result[j] = result[j], result[i]
}
return string(result)
}
func truncateFilename(filename string, maxLen int) string {
if len(filename) <= maxLen {
return filename
}
ext := filepath.Ext(filename)
name := filename[:len(filename)-len(ext)]
available := maxLen - len(ext)
if available <= 0 {
return filename[:maxLen]
}
half := available / 2
return name[:half] + name[len(name)-(available-half):] + ext
}