feat: Add ent-based sqlite3 storage

Signed-off-by: m.nabokikh <maksim.nabokikh@flant.com>

storage/ent/client/authcode.go

@@ -0,0 +1,52 @@
+package client
+
+import (
+	"context"
+
+	"github.com/dexidp/dex/storage"
+)
+
+// CreateAuthCode saves provided auth code into the database.
+func (d *Database) CreateAuthCode(code storage.AuthCode) error {
+	_, err := d.client.AuthCode.Create().
+		SetID(code.ID).
+		SetClientID(code.ClientID).
+		SetScopes(code.Scopes).
+		SetRedirectURI(code.RedirectURI).
+		SetNonce(code.Nonce).
+		SetClaimsUserID(code.Claims.UserID).
+		SetClaimsEmail(code.Claims.Email).
+		SetClaimsEmailVerified(code.Claims.EmailVerified).
+		SetClaimsUsername(code.Claims.Username).
+		SetClaimsPreferredUsername(code.Claims.PreferredUsername).
+		SetClaimsGroups(code.Claims.Groups).
+		SetCodeChallenge(code.PKCE.CodeChallenge).
+		SetCodeChallengeMethod(code.PKCE.CodeChallengeMethod).
+		// Save utc time into database because ent doesn't support comparing dates with different timezones
+		SetExpiry(code.Expiry.UTC()).
+		SetConnectorID(code.ConnectorID).
+		SetConnectorData(code.ConnectorData).
+		Save(context.TODO())
+	if err != nil {
+		return convertDBError("create auth code: %w", err)
+	}
+	return nil
+}
+
+// GetAuthCode extracts an auth code from the database by id.
+func (d *Database) GetAuthCode(id string) (storage.AuthCode, error) {
+	authCode, err := d.client.AuthCode.Get(context.TODO(), id)
+	if err != nil {
+		return storage.AuthCode{}, convertDBError("get auth code: %w", err)
+	}
+	return toStorageAuthCode(authCode), nil
+}
+
+// DeleteAuthCode deletes an auth code from the database by id.
+func (d *Database) DeleteAuthCode(id string) error {
+	err := d.client.AuthCode.DeleteOneID(id).Exec(context.TODO())
+	if err != nil {
+		return convertDBError("delete auth code: %w", err)
+	}
+	return nil
+}