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

backend/product/providers/sendico/client.go

@@ -0,0 +1,69 @@
+package sendico
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"io"
+	"net/http"
+
+	"git.sendico.io/tech/sxchnge/product/identity"
+	merrors "git.sendico.io/tech/sxchnge/shared/errors"
+	"go.mongodb.org/mongo-driver/v2/bson"
+)
+
+func (c *Client) post(ctx context.Context, resource, requestRef string, payload any) (receiptDTO, error) {
+	var receipt receiptDTO
+	token, err := c.token()
+	if err != nil {
+		return receipt, err
+	}
+	var body []byte
+	if payload != nil {
+		body, err = json.Marshal(payload)
+		if err != nil {
+			return receipt, merrors.OpaqueWrap(merrors.ErrServiceUnavailable, err, "encode Sendico request")
+		}
+	}
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, c.base+"/"+resource+"/"+c.config.OrganizationID, bytes.NewReader(body))
+	if err != nil {
+		return receipt, merrors.OpaqueWrap(merrors.ErrServiceUnavailable, err, "create Sendico request")
+	}
+	req.Header.Set("Authorization", "Bearer "+token)
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("X-Request-ID", requestRef)
+	response, err := c.http.Do(req)
+	if err != nil {
+		return receipt, merrors.OpaqueWrap(merrors.ErrServiceUnavailable, err, "Sendico request failed")
+	}
+	defer func() { _ = response.Body.Close() }()
+	// Never decode or expose upstream error bodies, which can contain assertions.
+	if response.StatusCode != http.StatusOK {
+		return receipt, merrors.ServiceUnavailable("Sendico request was not accepted")
+	}
+	decoder := json.NewDecoder(io.LimitReader(response.Body, 16385))
+	var envelope envelopeDTO
+	if err := decoder.Decode(&envelope); err != nil {
+		return receipt, merrors.OpaqueWrap(merrors.ErrServiceUnavailable, err, "decode Sendico receipt")
+	}
+	var trailing any
+	if decoder.Decode(&trailing) != io.EOF || envelope.Status != "success" {
+		return receipt, merrors.ServiceUnavailable("invalid Sendico response")
+	}
+	return envelope.Data, nil
+}
+
+func (c *Client) Register(ctx context.Context, requestRef string) (string, error) {
+	dto, err := c.post(ctx, "individuals", requestRef, nil)
+	if err != nil {
+		return "", err
+	}
+	return mapSubject(dto)
+}
+func (c *Client) Submit(ctx context.Context, subject, source string, facts identity.Facts) (identity.Receipt, error) {
+	dto, err := c.post(ctx, "identity_facts", bson.NewObjectID().Hex(), mapFacts(subject, source, facts))
+	if err != nil {
+		return identity.Receipt{}, err
+	}
+	return mapReceipt(dto, subject)
+}