Connect sign-up to Sendico Facts intake (#46)

backend/product/providers/sendico/dto.go

@@ -0,0 +1,51 @@
+package sendico
+
+import (
+	"time"
+
+	"git.sendico.io/tech/sxchnge/product/identity"
+	merrors "git.sendico.io/tech/sxchnge/shared/errors"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+// Only consumed wire fields are owned here; never import platform modules.
+type factsDTO struct {
+	FullName    string `json:"full_name"`
+	Email       string `json:"email"`
+	CustomerRef string `json:"external_customer_ref"`
+}
+type submissionDTO struct {
+	SubjectRef string   `json:"subject_ref"`
+	SourceRef  string   `json:"source_submission_ref"`
+	Facts      factsDTO `json:"facts"`
+}
+type receiptDTO struct {
+	SubjectRef    string    `json:"subject_ref"`
+	RegisteredAt  time.Time `json:"registered_at"`
+	SubmissionRef string    `json:"submission_ref"`
+	AcceptedAt    time.Time `json:"accepted_at"`
+}
+type envelopeDTO struct {
+	Status string     `json:"status"`
+	Data   receiptDTO `json:"data"`
+}
+
+func validRef(ref string) bool {
+	id, err := bson.ObjectIDFromHex(ref)
+	return err == nil && !id.IsZero() && id.Hex() == ref
+}
+func mapFacts(subject, source string, facts identity.Facts) submissionDTO {
+	return submissionDTO{SubjectRef: subject, SourceRef: source, Facts: factsDTO{FullName: facts.FullName, Email: facts.Email, CustomerRef: facts.CustomerRef}}
+}
+func mapSubject(dto receiptDTO) (string, error) {
+	if !validRef(dto.SubjectRef) || dto.RegisteredAt.IsZero() {
+		return "", merrors.ServiceUnavailable("invalid Sendico registration receipt")
+	}
+	return dto.SubjectRef, nil
+}
+func mapReceipt(dto receiptDTO, subject string) (identity.Receipt, error) {
+	if !validRef(dto.SubmissionRef) || dto.SubjectRef != subject || dto.AcceptedAt.IsZero() {
+		return identity.Receipt{}, merrors.ServiceUnavailable("invalid Sendico intake receipt")
+	}
+	return identity.Receipt{SubmissionRef: dto.SubmissionRef, SubjectRef: dto.SubjectRef, AcceptedAt: dto.AcceptedAt}, nil
+}