Modify ocm client

Closes #3 (closed)

@valerii.kalashnikov

ocm/client.go

 package ocm
 
 import (
-	"bytes"
 	"context"
 	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
+	"net/url"
+)
+
+const (
+	proofOutOfBandPath    = "/proof/v1/out-of-band-proof"
+	proofPresentationPath = "/proof/v1/find-by-presentation-id"
 )
 
 // Client is the OCM service client
@@ -30,26 +35,61 @@ func New(addr string, opts ...Option) *Client {
 }
 
 // GetLoginProofInvitation calls the "invitation" endpoint on
-// the "out-of-band" protocol in the OCM service.
-func (c *Client) GetLoginProofInvitation(ctx context.Context, r *LoginProofInvitationRequest) (*LoginProofInvitationResponse, error) {
-	b, err := json.Marshal(r)
+// the "out-of-band" protocol in the OCM.
+func (c *Client) GetLoginProofInvitation(ctx context.Context, credTypes []string) (*LoginProofInvitationResponse, error) {
+	req, err := http.NewRequestWithContext(ctx, "POST", c.addr+proofOutOfBandPath, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	v := url.Values{}
+	for _, t := range credTypes {
+		v.Add("type", t)
+	}
+	req.URL.RawQuery = v.Encode()
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close() // nolint:errcheck
+
+	if resp.StatusCode != http.StatusCreated && resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected response code: %s", resp.Status)
+	}
+
+	bytes, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return nil, err
 	}
 
-	req, err := http.NewRequestWithContext(ctx, "POST", c.addr+"/out-of-band/1.0/invitation", bytes.NewReader(b))
+	var response LoginProofInvitationResponse
+	if err := json.Unmarshal(bytes, &response); err != nil {
+		return nil, err
+	}
+
+	return &response, nil
+}
+
+// GetLoginProofResult calls the "find-by-presentation-id" endpoint in the OCM.
+func (c *Client) GetLoginProofResult(ctx context.Context, presentationID string) (*LoginProofResultResponse, error) {
+	req, err := http.NewRequestWithContext(ctx, "GET", c.addr+proofPresentationPath, nil)
 	if err != nil {
 		return nil, err
 	}
 
+	v := url.Values{}
+	v.Add("presentationId", presentationID)
+	req.URL.RawQuery = v.Encode()
+
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
 		return nil, err
 	}
 	defer resp.Body.Close() // nolint:errcheck
 
-	if resp.StatusCode != http.StatusCreated && resp.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("unexpected response code: %d", resp.StatusCode)
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("unexpected response code: %s", resp.Status)
 	}
 
 	bytes, err := io.ReadAll(resp.Body)
@@ -57,10 +97,10 @@ func (c *Client) GetLoginProofInvitation(ctx context.Context, r *LoginProofInvit
 		return nil, err
 	}
 
-	var response *LoginProofInvitationResponse
+	var response LoginProofResultResponse
 	if err := json.Unmarshal(bytes, &response); err != nil {
 		return nil, err
 	}
 
-	return response, nil
+	return &response, nil
 }