client.go

//go:generate go tool -modfile=go.tool.mod github.com/oapi-codegen/oapi-codegen/v2/cmd/oapi-codegen -config cfg.yaml ./api/openapi.json

package tripletex

import (
	"fmt"
	"net/http"
	"time"
)

type TripletexClient struct {
	token         *Token
	tokenDuration time.Duration
	credentials   Credentials
	baseURL       string
	httpClient    *http.Client
	*ClientWithResponses
}

type Credentials struct {
	ConsumerToken string // Application specific token
	EmployeeToken string // Client specific token
	clientId      int64  // Used with [WithAccountantClient]
}

type Option func(*TripletexClient)

// WithHttpClient sets a custom http.Client. Defaults to [http.DefaultClient].
func WithHttpClient(client *http.Client) Option {
	return func(tc *TripletexClient) {
		tc.httpClient = client
	}
}

// WithTokenDuration sets the token duration. Defaults to one month.
func WithTokenDuration(duration time.Duration) Option {
	return func(tc *TripletexClient) {
		tc.tokenDuration = duration
	}
}

// WithBaseURLOption sets a custom base URL. Defaults to "https://tripletex.no/v2".
func WithBaseURLOption(baseURL string) Option {
	return func(tc *TripletexClient) {
		tc.baseURL = baseURL
	}
}

// WithAccountantClient sets clientId as username for
// [TripletexClient.interceptAuth].
//
// See https://developer.tripletex.no/docs/documentation/authentication-and-tokens/#accountant-token
// for more details.
func WithAccountantClient(clientId int64) Option {
	return func(tc *TripletexClient) {
		tc.credentials.clientId = clientId
	}
}

// Returns new [TripletexClient].
//
// You can reuse an already generated token and have it revalidated if it has
// expired, by using [TripletexClient.SetToken].
//
// You can provide options to customize the client behavior.
func New(credentials Credentials, options ...Option) *TripletexClient {
	now := time.Now()
	client := &TripletexClient{
		baseURL:       "https://tripletex.no/v2",
		credentials:   credentials,
		tokenDuration: now.AddDate(0, 1, 0).Sub(now),
		httpClient:    http.DefaultClient,
	}

	for _, option := range options {
		option(client)
	}

	c, err := NewClientWithResponses(
		client.baseURL,
		WithRequestEditorFn(client.interceptAuth),
		WithHTTPClient(client.httpClient))
	if err != nil {
		panic(fmt.Errorf("tripletex: failed to create new client: %w", err))
	}

	client.ClientWithResponses = c
	return client
}