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opts.go
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opts.go
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/*
Copyright SecureKey Technologies Inc. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0
*/
package msp
import (
"github.com/aiguo186/fabric-sdk-go-gm/pkg/common/providers/msp"
"github.com/pkg/errors"
)
// IdentityConfigOptions represents IdentityConfig interface with overridable interface functions
// if a function is not overridden, the default IdentityConfig implementation will be used.
type IdentityConfigOptions struct {
client
caConfig
caServerCerts
caClientKey
caClientCert
caKeyStorePath
credentialStorePath
}
type applier func()
type predicate func() bool
type setter struct{ isSet bool }
// client interface allows to uniquely override IdentityConfig interface's Client() function
type client interface {
Client() *msp.ClientConfig
}
// caConfig interface allows to uniquely override IdentityConfig interface's CAConfig() function
type caConfig interface {
CAConfig(caID string) (*msp.CAConfig, bool)
}
// caServerCerts interface allows to uniquely override IdentityConfig interface's CAServerCerts() function
type caServerCerts interface {
CAServerCerts(caID string) ([][]byte, bool)
}
// caClientKey interface allows to uniquely override IdentityConfig interface's CAClientKey() function
type caClientKey interface {
CAClientKey(caID string) ([]byte, bool)
}
// caClientCert interface allows to uniquely override IdentityConfig interface's CAClientCert() function
type caClientCert interface {
CAClientCert(caID string) ([]byte, bool)
}
// caKeyStorePath interface allows to uniquely override IdentityConfig interface's CAKeyStorePath() function
type caKeyStorePath interface {
CAKeyStorePath() string
}
// credentialStorePath interface allows to uniquely override IdentityConfig interface's CredentialStorePath() function
type credentialStorePath interface {
CredentialStorePath() string
}
// BuildIdentityConfigFromOptions will return an IdentityConfig instance pre-built with Optional interfaces
// provided in fabsdk's WithConfigIdentity(opts...) call
func BuildIdentityConfigFromOptions(opts ...interface{}) (msp.IdentityConfig, error) {
// build a new IdentityConfig with overridden function implementations
c := &IdentityConfigOptions{}
for _, option := range opts {
err := setIdentityConfigWithOptionInterface(c, option)
if err != nil {
return nil, err
}
}
return c, nil
}
// UpdateMissingOptsWithDefaultConfig will verify if any functions of the IdentityConfig were not updated with fabsdk's
// WithConfigIdentity(opts...) call, then use default IdentityConfig interface for these functions instead
func UpdateMissingOptsWithDefaultConfig(c *IdentityConfigOptions, d msp.IdentityConfig) msp.IdentityConfig {
s := &setter{}
s.set(c.client, nil, func() { c.client = d })
s.set(c.caConfig, nil, func() { c.caConfig = d })
s.set(c.caServerCerts, nil, func() { c.caServerCerts = d })
s.set(c.caClientKey, nil, func() { c.caClientKey = d })
s.set(c.caClientCert, nil, func() { c.caClientCert = d })
s.set(c.caKeyStorePath, nil, func() { c.caKeyStorePath = d })
s.set(c.credentialStorePath, nil, func() { c.credentialStorePath = d })
return c
}
// IsIdentityConfigFullyOverridden will return true if all of the argument's sub interfaces is not nil
// (ie IdentityConfig interface not fully overridden)
func IsIdentityConfigFullyOverridden(c *IdentityConfigOptions) bool {
return !anyNil(c.client, c.caConfig, c.caServerCerts, c.caClientKey, c.caClientCert, c.caKeyStorePath, c.credentialStorePath)
}
// will override IdentityConfig interface with functions provided by o (option)
func setIdentityConfigWithOptionInterface(c *IdentityConfigOptions, o interface{}) error {
s := &setter{}
s.set(c.client, func() bool { _, ok := o.(client); return ok }, func() { c.client = o.(client) })
s.set(c.caConfig, func() bool { _, ok := o.(caConfig); return ok }, func() { c.caConfig = o.(caConfig) })
s.set(c.caServerCerts, func() bool { _, ok := o.(caServerCerts); return ok }, func() { c.caServerCerts = o.(caServerCerts) })
s.set(c.caClientKey, func() bool { _, ok := o.(caClientKey); return ok }, func() { c.caClientKey = o.(caClientKey) })
s.set(c.caClientCert, func() bool { _, ok := o.(caClientCert); return ok }, func() { c.caClientCert = o.(caClientCert) })
s.set(c.caKeyStorePath, func() bool { _, ok := o.(caKeyStorePath); return ok }, func() { c.caKeyStorePath = o.(caKeyStorePath) })
s.set(c.credentialStorePath, func() bool { _, ok := o.(credentialStorePath); return ok }, func() { c.credentialStorePath = o.(credentialStorePath) })
if !s.isSet {
return errors.Errorf("option %#v is not a sub interface of IdentityConfig, at least one of its functions must be implemented.", o)
}
return nil
}
// needed to avoid meta-linter errors (too many if conditions)
func (o *setter) set(current interface{}, check predicate, apply applier) {
if current == nil && (check == nil || check()) {
apply()
o.isSet = true
}
}
// will verify if any of objs element is nil, also needed to avoid meta-linter errors
func anyNil(objs ...interface{}) bool {
for _, p := range objs {
if p == nil {
return true
}
}
return false
}