[#48] client: Refactor SessionCreate()

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

client/session.go

@@ -3,11 +3,14 @@ package client
 import (
 	"context"
 	"crypto/ecdsa"
+	"fmt"
 
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
 	rpcapi "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc"
 	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/client"
 	v2session "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session"
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/signature"
+	apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/user"
 )
 
@@ -33,6 +36,30 @@ func (x *PrmSessionCreate) UseKey(key ecdsa.PrivateKey) {
 	x.key = key
 }
 
+func (x *PrmSessionCreate) buildRequest(c *Client) (*v2session.CreateRequest, error) {
+	ownerKey := c.prm.key.PublicKey
+	if x.keySet {
+		ownerKey = x.key.PublicKey
+	}
+	var ownerID user.ID
+	user.IDFromKey(&ownerID, ownerKey)
+
+	var ownerIDV2 refs.OwnerID
+	ownerID.WriteToV2(&ownerIDV2)
+
+	reqBody := new(v2session.CreateRequestBody)
+	reqBody.SetOwnerID(&ownerIDV2)
+	reqBody.SetExpiration(x.exp)
+
+	var meta v2session.RequestMetaHeader
+	writeXHeadersToMeta(x.xHeaders, &meta)
+
+	var req v2session.CreateRequest
+	req.SetBody(reqBody)
+	c.prepareRequest(&req, &meta)
+	return &req, nil
+}
+
 // ResSessionCreate groups resulting values of SessionCreate operation.
 type ResSessionCreate struct {
 	statusRes
@@ -42,10 +69,6 @@ type ResSessionCreate struct {
 	sessionKey []byte
 }
 
-func (x *ResSessionCreate) setID(id []byte) {
-	x.id = id
-}
-
 // ID returns identifier of the opened session in a binary FrostFS API protocol format.
 //
 // Client doesn't retain value so modification is safe.
@@ -53,10 +76,6 @@ func (x ResSessionCreate) ID() []byte {
 	return x.id
 }
 
-func (x *ResSessionCreate) setSessionKey(key []byte) {
-	x.sessionKey = key
-}
-
 // PublicKey returns public key of the opened session in a binary FrostFS API protocol format.
 func (x ResSessionCreate) PublicKey() []byte {
 	return x.sessionKey
@@ -78,57 +97,28 @@ func (x ResSessionCreate) PublicKey() []byte {
 // Return statuses:
 //   - global (see Client docs).
 func (c *Client) SessionCreate(ctx context.Context, prm PrmSessionCreate) (*ResSessionCreate, error) {
-	ownerKey := c.prm.key.PublicKey
+	req, err := prm.buildRequest(c)
-	if prm.keySet {
+	if err != nil {
-		ownerKey = prm.key.PublicKey
+		return nil, err
-	}
-	var ownerID user.ID
-	user.IDFromKey(&ownerID, ownerKey)
-
-	var ownerIDV2 refs.OwnerID
-	ownerID.WriteToV2(&ownerIDV2)
-
-	// form request body
-	reqBody := new(v2session.CreateRequestBody)
-	reqBody.SetOwnerID(&ownerIDV2)
-	reqBody.SetExpiration(prm.exp)
-
-	// for request
-	var req v2session.CreateRequest
-
-	req.SetBody(reqBody)
-
-	// init call context
-
-	var (
-		cc  contextCall
-		res ResSessionCreate
-	)
-
-	c.initCallContext(&cc)
-	if prm.keySet {
-		cc.key = prm.key
 	}
 
-	cc.meta = prm.prmCommonMeta
+	if err := signature.SignServiceMessage(&c.prm.key, req); err != nil {
-	cc.req = &req
+		return nil, fmt.Errorf("sign request: %w", err)
-	cc.statusRes = &res
+	}
-	cc.call = func() (responseV2, error) {
+
-		return rpcapi.CreateSession(&c.c, &req, client.WithContext(ctx))
+	resp, err := rpcapi.CreateSession(&c.c, req, client.WithContext(ctx))
+	if err != nil {
+		return nil, err
+	}
+
+	var res ResSessionCreate
+	res.st, err = c.processResponse(resp)
+	if err != nil || !apistatus.IsSuccessful(res.st) {
+		return &res, err
 	}
-	cc.result = func(r responseV2) {
-		resp := r.(*v2session.CreateResponse)
 
 	body := resp.GetBody()
-
+	res.id = body.GetID()
-		res.setID(body.GetID())
+	res.sessionKey = body.GetSessionKey()
-		res.setSessionKey(body.GetSessionKey())
-	}
-
-	// process call
-	if !cc.processCall() {
-		return nil, cc.err
-	}
-
 	return &res, nil
 }