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credentials_chain.go
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/
credentials_chain.go
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package n26api
var _ CredentialsProvider = (*chainCredentialsProvider)(nil)
type chainCredentialsProvider []CredentialsProvider
// Username provides the first non-empty username from the chain.
func (chain *chainCredentialsProvider) Username() string {
for _, p := range *chain {
if username := p.Username(); username != "" {
return username
}
}
return ""
}
// Password provides the first non-empty password from the chain.
func (chain *chainCredentialsProvider) Password() string {
for _, p := range *chain {
if username := p.Password(); username != "" {
return username
}
}
return ""
}
// append appends a new provider to the chain.
func (chain *chainCredentialsProvider) append(provider CredentialsProvider) {
*chain = append(*chain, provider)
}
// prepend prepends a new provider to the chain.
func (chain *chainCredentialsProvider) prepend(provider CredentialsProvider) {
*chain = append(*chain, provider)
copy((*chain)[1:], *chain)
(*chain)[0] = provider
}
// newChainCredentialsProvider initiates a chain of CredentialsProvider.
func newChainCredentialsProvider() *chainCredentialsProvider {
chain := make(chainCredentialsProvider, 0)
return &chain
}
// chainCredentialsProviders chains a list of CredentialsProvider.
func chainCredentialsProviders(providers ...CredentialsProvider) *chainCredentialsProvider {
chain := newChainCredentialsProvider()
*chain = providers
return chain
}