131 lines
3.5 KiB
Go
131 lines
3.5 KiB
Go
package response
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import (
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"net/http"
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"strconv"
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"github.com/beckn/beckn-onix/pkg/log"
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"github.com/beckn/beckn-onix/pkg/model"
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)
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// ErrorType represents different types of errors in the Beckn protocol.
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type ErrorType string
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const (
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// SchemaValidationErrorType represents an error due to schema validation failure.
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SchemaValidationErrorType ErrorType = "SCHEMA_VALIDATION_ERROR"
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// InvalidRequestErrorType represents an error due to an invalid request.
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InvalidRequestErrorType ErrorType = "INVALID_REQUEST"
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)
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// BecknRequest represents a generic Beckn request with an optional context.
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type BecknRequest struct {
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Context map[string]interface{} `json:"context,omitempty"`
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}
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// SendAck sends an acknowledgment (ACK) response indicating a successful request processing.
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func SendAck(w http.ResponseWriter) {
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// Create the response object
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resp := &model.Response{
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Message: model.Message{
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Ack: model.Ack{
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Status: model.StatusACK,
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},
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},
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}
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// Marshal to JSON
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data, err := json.Marshal(resp)
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if err != nil {
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http.Error(w, "failed to marshal response", http.StatusInternalServerError)
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return
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}
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// Set headers and write response
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusOK)
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if _, err := w.Write(data); err != nil {
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log.Error(context.Background(), err, "failed to write ack response")
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}
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}
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// nack sends a negative acknowledgment (NACK) response with an error message.
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func nack(w http.ResponseWriter, err *model.Error, status int) {
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// Create the NACK response object
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resp := &model.Response{
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Message: model.Message{
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Ack: model.Ack{
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Status: model.StatusNACK,
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},
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Error: err,
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},
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}
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// Marshal the response to JSON
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data, jsonErr := json.Marshal(resp)
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if jsonErr != nil {
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http.Error(w, "failed to marshal response", http.StatusInternalServerError)
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return
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}
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// Set headers and write response
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(status) // Assuming NACK means a bad request
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if _, err := w.Write(data); err != nil {
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log.Error(context.Background(), err, "failed to write nack response")
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}
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}
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func internalServerError(ctx context.Context) *model.Error {
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return &model.Error{
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Message: fmt.Sprintf("Internal server error, MessageID: %s", ctx.Value(model.MsgIDKey)),
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}
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}
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// SendNack sends a negative acknowledgment (NACK) response with an error message.
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func SendNack(ctx context.Context, w http.ResponseWriter, err error) {
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var schemaErr *model.SchemaValidationErr
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var signErr *model.SignValidationErr
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var badReqErr *model.BadReqErr
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var notFoundErr *model.NotFoundErr
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switch {
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case errors.As(err, &schemaErr): // Custom application error
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nack(w, schemaErr.BecknError(), http.StatusBadRequest)
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return
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case errors.As(err, &signErr):
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nack(w, signErr.BecknError(), http.StatusUnauthorized)
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return
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case errors.As(err, &badReqErr):
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nack(w, badReqErr.BecknError(), http.StatusBadRequest)
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return
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case errors.As(err, ¬FoundErr):
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nack(w, notFoundErr.BecknError(), http.StatusNotFound)
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return
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default:
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nack(w, internalServerError(ctx), http.StatusInternalServerError)
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return
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}
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}
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// BecknError generates a standardized Beckn error response.
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func BecknError(ctx context.Context, err error, status int) *model.Error {
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msg := err.Error()
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msgID := ctx.Value(model.MsgIDKey)
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if status == http.StatusInternalServerError {
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msg = "Internal server error"
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}
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return &model.Error{
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Message: fmt.Sprintf("%s. MessageID: %s.", msg, msgID),
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Code: strconv.Itoa(status),
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}
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}
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