client.go

/*
 * finAPI Access (with deprecation)
 *
 * <strong>RESTful API for Account Information Services (AIS) and Payment Initiation Services (PIS)</strong>  The following pages give you some general information on how to use our APIs.<br/> The actual API services documentation then follows further below. You can use the menu to jump between API sections. <br/> <br/> This page has a built-in HTTP(S) client, so you can test the services directly from within this page, by filling in the request parameters and/or body in the respective services, and then hitting the TRY button. Note that you need to be authorized to make a successful API call. To authorize, refer to the 'Authorization' section of the API, or just use the OAUTH button that can be found near the TRY button. <br/>  <h2 id=\"general-information\">General information</h2>  <h3 id=\"general-error-responses\"><strong>Error Responses</strong></h3> When an API call returns with an error, then in general it has the structure shown in the following example:  <pre> {   \"errors\": [     {       \"message\": \"Interface 'FINTS_SERVER' is not supported for this operation.\",       \"code\": \"BAD_REQUEST\",       \"type\": \"TECHNICAL\"     }   ],   \"date\": \"2020-11-19 16:54:06.854\",   \"requestId\": \"selfgen-312042e7-df55-47e4-bffd-956a68ef37b5\",   \"endpoint\": \"POST /api/v1/bankConnections/import\",   \"authContext\": \"1/21\",   \"bank\": \"DEMO0002 - finAPI Test Redirect Bank\" } </pre>  If an API call requires an additional authentication by the user, HTTP code 510 is returned and the error response contains the additional \"multiStepAuthentication\" object, see the following example:  <pre> {   \"errors\": [     {       \"message\": \"Es ist eine zusätzliche Authentifizierung erforderlich. Bitte geben Sie folgenden Code an: 123456\",       \"code\": \"ADDITIONAL_AUTHENTICATION_REQUIRED\",       \"type\": \"BUSINESS\",       \"multiStepAuthentication\": {         \"hash\": \"678b13f4be9ed7d981a840af8131223a\",         \"status\": \"CHALLENGE_RESPONSE_REQUIRED\",         \"challengeMessage\": \"Es ist eine zusätzliche Authentifizierung erforderlich. Bitte geben Sie folgenden Code an: 123456\",         \"answerFieldLabel\": \"TAN\",         \"redirectUrl\": null,         \"redirectContext\": null,         \"redirectContextField\": null,         \"twoStepProcedures\": null,         \"photoTanMimeType\": null,         \"photoTanData\": null,         \"opticalData\": null       }     }   ],   \"date\": \"2019-11-29 09:51:55.931\",   \"requestId\": \"selfgen-45059c99-1b14-4df7-9bd3-9d5f126df294\",   \"endpoint\": \"POST /api/v1/bankConnections/import\",   \"authContext\": \"1/18\",   \"bank\": \"DEMO0001 - finAPI Test Bank\" } </pre>  An exception to this error format are API authentication errors, where the following structure is returned:  <pre> {   \"error\": \"invalid_token\",   \"error_description\": \"Invalid access token: cccbce46-xxxx-xxxx-xxxx-xxxxxxxxxx\" } </pre>  <h3 id=\"general-paging\"><strong>Paging</strong></h3> API services that may potentially return a lot of data implement paging. They return a limited number of entries within a \"page\". Further entries must be fetched with subsequent calls. <br/><br/> Any API service that implements paging provides the following input parameters:<br/> &bull; \"page\": the number of the page to be retrieved (starting with 1).<br/> &bull; \"perPage\": the number of entries within a page. The default and maximum value is stated in the documentation of the respective services.  A paged response contains an additional \"paging\" object with the following structure:  <pre> {   ...   ,   \"paging\": {     \"page\": 1,     \"perPage\": 20,     \"pageCount\": 234,     \"totalCount\": 4662   } } </pre>  <h3 id=\"general-internationalization\"><strong>Internationalization</strong></h3> The finAPI services support internationalization which means you can define the language you prefer for API service responses. <br/><br/> The following languages are available: German, English, Czech, Slovak. <br/><br/> The preferred language can be defined by providing the official HTTP <strong>Accept-Language</strong> header. <br/><br/> finAPI reacts on the official iso language codes &quot;de&quot;, &quot;en&quot;, &quot;cs&quot; and &quot;sk&quot; for the named languages. Additional subtags supported by the Accept-Language header may be provided, e.g. &quot;en-US&quot;, but are ignored. <br/> If no Accept-Language header is given, German is used as the default language. <br/><br/> Exceptions:<br/> &bull; Bank login hints and login fields are only available in the language of the bank and not being translated.<br/> &bull; Direct messages from the bank systems typically returned as BUSINESS errors will not be translated.<br/> &bull; BUSINESS errors created by finAPI directly are available in German and English.<br/> &bull; TECHNICAL errors messages meant for developers are mostly in English, but also may be translated.  <h3 id=\"general-request-ids\"><strong>Request IDs</strong></h3> With any API call, you can pass a request ID via a header with name \"X-Request-Id\". The request ID can be an arbitrary string with up to 255 characters. Passing a longer string will result in an error. <br/><br/> If you don't pass a request ID for a call, finAPI will generate a random ID internally. <br/><br/> The request ID is always returned back in the response of a service, as a header with name \"X-Request-Id\". <br/><br/> We highly recommend to always pass a (preferably unique) request ID, and include it into your client application logs whenever you make a request or receive a response (especially in the case of an error response). finAPI is also logging request IDs on its end. Having a request ID can help the finAPI support team to work more efficiently and solve tickets faster.  <h3 id=\"general-overriding-http-methods\"><strong>Overriding HTTP methods</strong></h3> Some HTTP clients do not support the HTTP methods PATCH or DELETE. If you are using such a client in your application, you can use a POST request instead with a special HTTP header indicating the originally intended HTTP method. <br/><br/> The header's name is <strong>X-HTTP-Method-Override</strong>. Set its value to either <strong>PATCH</strong> or <strong>DELETE</strong>. POST Requests having this header set will be treated either as PATCH or DELETE by the finAPI servers. <br/><br/> Example: <br/><br/> <strong>X-HTTP-Method-Override: PATCH</strong><br/> POST /api/v1/label/51<br/> {\"name\": \"changed label\"}<br/><br/> will be interpreted by finAPI as:<br/><br/> PATCH /api/v1/label/51<br/> {\"name\": \"changed label\"}<br/>  <h3 id=\"general-user-metadata\"><strong>User metadata</strong></h3> With the migration to PSD2 APIs, a new term called \"User metadata\" (also known as \"PSU metadata\") has been introduced to the API. This user metadata aims to inform the banking API if there was a real end-user behind an HTTP request or if the request was triggered by a system (e.g. by an automatic batch update). In the latter case, the bank may apply some restrictions such as limiting the number of HTTP requests for a single consent. Also, some operations may be forbidden entirely by the banking API. For example, some banks do not allow issuing a new consent without the end-user being involved. Therefore, it is certainly necessary and obligatory for the customer to provide the PSU metadata for such operations. <br/><br/> As finAPI does not have direct interaction with the end-user, it is the client application's responsibility to provide all the necessary information about the end-user. This must be done by sending additional headers with every request triggered on behalf of the end-user. <br/><br/> At the moment, the following headers are supported by the API:<br/> &bull; \"PSU-IP-Address\" - the IP address of the user's device.<br/> &bull; \"PSU-Device-OS\" - the user's device and/or operating system identification.<br/> &bull; \"PSU-User-Agent\" - the user's web browser or other client device identification.  <h3 id=\"general-faq\"><strong>FAQ</strong></h3> <strong>Is there a finAPI SDK?</strong> <br/> Currently we do not offer a native SDK, but there is the option to generate an SDK for almost any target language via OpenAPI. Use the 'Download SDK' button on this page for SDK generation. <br/> <br/> <strong>How can I enable finAPI's automatic batch update?</strong> <br/> Currently there is no way to set up the batch update via the API. Please contact support@finapi.io for this. <br/> <br/> <strong>Why do I need to keep authorizing when calling services on this page?</strong> <br/> This page is a \"one-page-app\". Reloading the page resets the OAuth authorization context. There is generally no need to reload the page, so just don't do it and your authorization will persist. 
 *
 * API version: 1.151.1
 * Contact: kontakt@finapi.io
 */

// Code generated by OpenAPI Generator (https://openapi-generator.tech); DO NOT EDIT.

package finapi

import (
	"bytes"
	"context"
	"encoding/json"
	"encoding/xml"
	"errors"
	"fmt"
	"io"
	"log"
	"mime/multipart"
	"net/http"
	"net/http/httputil"
	"net/url"
	"os"
	"path/filepath"
	"reflect"
	"regexp"
	"strconv"
	"strings"
	"time"
	"unicode/utf8"

	"golang.org/x/oauth2"
)

var (
	jsonCheck = regexp.MustCompile(`(?i:(?:application|text)/(?:vnd\.[^;]+\+)?json)`)
	xmlCheck  = regexp.MustCompile(`(?i:(?:application|text)/xml)`)
)

// APIClient manages communication with the finAPI Access (with deprecation) API v1.151.1
// In most cases there should be only one, shared, APIClient.
type APIClient struct {
	cfg    *Configuration
	common service // Reuse a single struct instead of allocating one for each service on the heap.

	// API Services

	AccountsApi *AccountsApiService

	AuthorizationApi *AuthorizationApiService

	BankConnectionsApi *BankConnectionsApiService

	BanksApi *BanksApiService

	CategoriesApi *CategoriesApiService

	ClientConfigurationApi *ClientConfigurationApiService

	LabelsApi *LabelsApiService

	MandatorAdministrationApi *MandatorAdministrationApiService

	MocksAndTestsApi *MocksAndTestsApiService

	NotificationRulesApi *NotificationRulesApiService

	PaymentsApi *PaymentsApiService

	SecuritiesApi *SecuritiesApiService

	StandingOrdersApi *StandingOrdersApiService

	TPPCertificatesApi *TPPCertificatesApiService

	TPPCredentialsApi *TPPCredentialsApiService

	TransactionsApi *TransactionsApiService

	UsersApi *UsersApiService

	WebFormsApi *WebFormsApiService
}

type service struct {
	client *APIClient
}

// NewAPIClient creates a new API client. Requires a userAgent string describing your application.
// optionally a custom http.Client to allow for advanced features such as caching.
func NewAPIClient(cfg *Configuration) *APIClient {
	if cfg.HTTPClient == nil {
		cfg.HTTPClient = http.DefaultClient
	}

	c := &APIClient{}
	c.cfg = cfg
	c.common.client = c

	// API Services
	c.AccountsApi = (*AccountsApiService)(&c.common)
	c.AuthorizationApi = (*AuthorizationApiService)(&c.common)
	c.BankConnectionsApi = (*BankConnectionsApiService)(&c.common)
	c.BanksApi = (*BanksApiService)(&c.common)
	c.CategoriesApi = (*CategoriesApiService)(&c.common)
	c.ClientConfigurationApi = (*ClientConfigurationApiService)(&c.common)
	c.LabelsApi = (*LabelsApiService)(&c.common)
	c.MandatorAdministrationApi = (*MandatorAdministrationApiService)(&c.common)
	c.MocksAndTestsApi = (*MocksAndTestsApiService)(&c.common)
	c.NotificationRulesApi = (*NotificationRulesApiService)(&c.common)
	c.PaymentsApi = (*PaymentsApiService)(&c.common)
	c.SecuritiesApi = (*SecuritiesApiService)(&c.common)
	c.StandingOrdersApi = (*StandingOrdersApiService)(&c.common)
	c.TPPCertificatesApi = (*TPPCertificatesApiService)(&c.common)
	c.TPPCredentialsApi = (*TPPCredentialsApiService)(&c.common)
	c.TransactionsApi = (*TransactionsApiService)(&c.common)
	c.UsersApi = (*UsersApiService)(&c.common)
	c.WebFormsApi = (*WebFormsApiService)(&c.common)

	return c
}

func atoi(in string) (int, error) {
	return strconv.Atoi(in)
}

// selectHeaderContentType select a content type from the available list.
func selectHeaderContentType(contentTypes []string) string {
	if len(contentTypes) == 0 {
		return ""
	}
	if contains(contentTypes, "application/json") {
		return "application/json"
	}
	return contentTypes[0] // use the first content type specified in 'consumes'
}

// selectHeaderAccept join all accept types and return
func selectHeaderAccept(accepts []string) string {
	if len(accepts) == 0 {
		return ""
	}

	if contains(accepts, "application/json") {
		return "application/json"
	}

	return strings.Join(accepts, ",")
}

// contains is a case insenstive match, finding needle in a haystack
func contains(haystack []string, needle string) bool {
	for _, a := range haystack {
		if strings.ToLower(a) == strings.ToLower(needle) {
			return true
		}
	}
	return false
}

// Verify optional parameters are of the correct type.
func typeCheckParameter(obj interface{}, expected string, name string) error {
	// Make sure there is an object.
	if obj == nil {
		return nil
	}

	// Check the type is as expected.
	if reflect.TypeOf(obj).String() != expected {
		return fmt.Errorf("Expected %s to be of type %s but received %s.", name, expected, reflect.TypeOf(obj).String())
	}
	return nil
}

// parameterToString convert interface{} parameters to string, using a delimiter if format is provided.
func parameterToString(obj interface{}, collectionFormat string) string {
	var delimiter string

	switch collectionFormat {
	case "pipes":
		delimiter = "|"
	case "ssv":
		delimiter = " "
	case "tsv":
		delimiter = "\t"
	case "csv":
		delimiter = ","
	}

	if reflect.TypeOf(obj).Kind() == reflect.Slice {
		return strings.Trim(strings.Replace(fmt.Sprint(obj), " ", delimiter, -1), "[]")
	} else if t, ok := obj.(time.Time); ok {
		return t.Format(time.RFC3339)
	}

	return fmt.Sprintf("%v", obj)
}

// helper for converting interface{} parameters to json strings
func parameterToJson(obj interface{}) (string, error) {
	jsonBuf, err := json.Marshal(obj)
	if err != nil {
		return "", err
	}
	return string(jsonBuf), err
}


// callAPI do the request.
func (c *APIClient) callAPI(request *http.Request) (*http.Response, error) {
	if c.cfg.Debug {
		dump, err := httputil.DumpRequestOut(request, true)
		if err != nil {
			return nil, err
		}
		log.Printf("\n%s\n", string(dump))
	}

	resp, err := c.cfg.HTTPClient.Do(request)
	if err != nil {
		return resp, err
	}

	if c.cfg.Debug {
		dump, err := httputil.DumpResponse(resp, true)
		if err != nil {
			return resp, err
		}
		log.Printf("\n%s\n", string(dump))
	}
	return resp, err
}

// Allow modification of underlying config for alternate implementations and testing
// Caution: modifying the configuration while live can cause data races and potentially unwanted behavior
func (c *APIClient) GetConfig() *Configuration {
	return c.cfg
}

// prepareRequest build the request
func (c *APIClient) prepareRequest(
	ctx context.Context,
	path string, method string,
	postBody interface{},
	headerParams map[string]string,
	queryParams url.Values,
	formParams url.Values,
	formFileName string,
	fileName string,
	fileBytes []byte) (localVarRequest *http.Request, err error) {

	var body *bytes.Buffer

	// Detect postBody type and post.
	if postBody != nil {
		contentType := headerParams["Content-Type"]
		if contentType == "" {
			contentType = detectContentType(postBody)
			headerParams["Content-Type"] = contentType
		}

		body, err = setBody(postBody, contentType)
		if err != nil {
			return nil, err
		}
	}

	// add form parameters and file if available.
	if strings.HasPrefix(headerParams["Content-Type"], "multipart/form-data") && len(formParams) > 0 || (len(fileBytes) > 0 && fileName != "") {
		if body != nil {
			return nil, errors.New("Cannot specify postBody and multipart form at the same time.")
		}
		body = &bytes.Buffer{}
		w := multipart.NewWriter(body)

		for k, v := range formParams {
			for _, iv := range v {
				if strings.HasPrefix(k, "@") { // file
					err = addFile(w, k[1:], iv)
					if err != nil {
						return nil, err
					}
				} else { // form value
					w.WriteField(k, iv)
				}
			}
		}
		if len(fileBytes) > 0 && fileName != "" {
			w.Boundary()
			//_, fileNm := filepath.Split(fileName)
			part, err := w.CreateFormFile(formFileName, filepath.Base(fileName))
			if err != nil {
				return nil, err
			}
			_, err = part.Write(fileBytes)
			if err != nil {
				return nil, err
			}
		}

		// Set the Boundary in the Content-Type
		headerParams["Content-Type"] = w.FormDataContentType()

		// Set Content-Length
		headerParams["Content-Length"] = fmt.Sprintf("%d", body.Len())
		w.Close()
	}

	if strings.HasPrefix(headerParams["Content-Type"], "application/x-www-form-urlencoded") && len(formParams) > 0 {
		if body != nil {
			return nil, errors.New("Cannot specify postBody and x-www-form-urlencoded form at the same time.")
		}
		body = &bytes.Buffer{}
		body.WriteString(formParams.Encode())
		// Set Content-Length
		headerParams["Content-Length"] = fmt.Sprintf("%d", body.Len())
	}

	// Setup path and query parameters
	url, err := url.Parse(path)
	if err != nil {
		return nil, err
	}

	// Override request host, if applicable
	if c.cfg.Host != "" {
		url.Host = c.cfg.Host
	}

	// Override request scheme, if applicable
	if c.cfg.Scheme != "" {
		url.Scheme = c.cfg.Scheme
	}

	// Adding Query Param
	query := url.Query()
	for k, v := range queryParams {
		for _, iv := range v {
			query.Add(k, iv)
		}
	}

	// Encode the parameters.
	url.RawQuery = query.Encode()

	// Generate a new request
	if body != nil {
		localVarRequest, err = http.NewRequest(method, url.String(), body)
	} else {
		localVarRequest, err = http.NewRequest(method, url.String(), nil)
	}
	if err != nil {
		return nil, err
	}

	// add header parameters, if any
	if len(headerParams) > 0 {
		headers := http.Header{}
		for h, v := range headerParams {
			headers.Set(h, v)
		}
		localVarRequest.Header = headers
	}

	// Add the user agent to the request.
	localVarRequest.Header.Add("User-Agent", c.cfg.UserAgent)

	if ctx != nil {
		// add context to the request
		localVarRequest = localVarRequest.WithContext(ctx)

		// Walk through any authentication.

		// OAuth2 authentication
		if tok, ok := ctx.Value(ContextOAuth2).(oauth2.TokenSource); ok {
			// We were able to grab an oauth2 token from the context
			var latestToken *oauth2.Token
			if latestToken, err = tok.Token(); err != nil {
				return nil, err
			}

			latestToken.SetAuthHeader(localVarRequest)
		}

		// Basic HTTP Authentication
		if auth, ok := ctx.Value(ContextBasicAuth).(BasicAuth); ok {
			localVarRequest.SetBasicAuth(auth.UserName, auth.Password)
		}

		// AccessToken Authentication
		if auth, ok := ctx.Value(ContextAccessToken).(string); ok {
			localVarRequest.Header.Add("Authorization", "Bearer "+auth)
		}

	}

	for header, value := range c.cfg.DefaultHeader {
		localVarRequest.Header.Add(header, value)
	}
	return localVarRequest, nil
}

func (c *APIClient) decode(v interface{}, b []byte, contentType string) (err error) {
	if len(b) == 0 {
		return nil
	}
	if s, ok := v.(*string); ok {
		*s = string(b)
		return nil
	}
	if xmlCheck.MatchString(contentType) {
		if err = xml.Unmarshal(b, v); err != nil {
			return err
		}
		return nil
	}
	if jsonCheck.MatchString(contentType) {
		if actualObj, ok := v.(interface{GetActualInstance() interface{}}); ok { // oneOf, anyOf schemas
			if unmarshalObj, ok := actualObj.(interface{UnmarshalJSON([]byte) error}); ok { // make sure it has UnmarshalJSON defined
				if err = unmarshalObj.UnmarshalJSON(b); err!= nil {
					return err
				}
			} else {
				return errors.New("Unknown type with GetActualInstance but no unmarshalObj.UnmarshalJSON defined")
			}
		} else if err = json.Unmarshal(b, v); err != nil { // simple model
			return err
		}
		return nil
	}
	return errors.New("undefined response type")
}

// Add a file to the multipart request
func addFile(w *multipart.Writer, fieldName, path string) error {
	file, err := os.Open(path)
	if err != nil {
		return err
	}
	defer file.Close()

	part, err := w.CreateFormFile(fieldName, filepath.Base(path))
	if err != nil {
		return err
	}
	_, err = io.Copy(part, file)

	return err
}

// Prevent trying to import "fmt"
func reportError(format string, a ...interface{}) error {
	return fmt.Errorf(format, a...)
}

// Set request body from an interface{}
func setBody(body interface{}, contentType string) (bodyBuf *bytes.Buffer, err error) {
	if bodyBuf == nil {
		bodyBuf = &bytes.Buffer{}
	}

	if reader, ok := body.(io.Reader); ok {
		_, err = bodyBuf.ReadFrom(reader)
	} else if b, ok := body.([]byte); ok {
		_, err = bodyBuf.Write(b)
	} else if s, ok := body.(string); ok {
		_, err = bodyBuf.WriteString(s)
	} else if s, ok := body.(*string); ok {
		_, err = bodyBuf.WriteString(*s)
	} else if jsonCheck.MatchString(contentType) {
		err = json.NewEncoder(bodyBuf).Encode(body)
	} else if xmlCheck.MatchString(contentType) {
		err = xml.NewEncoder(bodyBuf).Encode(body)
	}

	if err != nil {
		return nil, err
	}

	if bodyBuf.Len() == 0 {
		err = fmt.Errorf("Invalid body type %s\n", contentType)
		return nil, err
	}
	return bodyBuf, nil
}

// detectContentType method is used to figure out `Request.Body` content type for request header
func detectContentType(body interface{}) string {
	contentType := "text/plain; charset=utf-8"
	kind := reflect.TypeOf(body).Kind()

	switch kind {
	case reflect.Struct, reflect.Map, reflect.Ptr:
		contentType = "application/json; charset=utf-8"
	case reflect.String:
		contentType = "text/plain; charset=utf-8"
	default:
		if b, ok := body.([]byte); ok {
			contentType = http.DetectContentType(b)
		} else if kind == reflect.Slice {
			contentType = "application/json; charset=utf-8"
		}
	}

	return contentType
}

// Ripped from https://github.com/gregjones/httpcache/blob/master/httpcache.go
type cacheControl map[string]string

func parseCacheControl(headers http.Header) cacheControl {
	cc := cacheControl{}
	ccHeader := headers.Get("Cache-Control")
	for _, part := range strings.Split(ccHeader, ",") {
		part = strings.Trim(part, " ")
		if part == "" {
			continue
		}
		if strings.ContainsRune(part, '=') {
			keyval := strings.Split(part, "=")
			cc[strings.Trim(keyval[0], " ")] = strings.Trim(keyval[1], ",")
		} else {
			cc[part] = ""
		}
	}
	return cc
}

// CacheExpires helper function to determine remaining time before repeating a request.
func CacheExpires(r *http.Response) time.Time {
	// Figure out when the cache expires.
	var expires time.Time
	now, err := time.Parse(time.RFC1123, r.Header.Get("date"))
	if err != nil {
		return time.Now()
	}
	respCacheControl := parseCacheControl(r.Header)

	if maxAge, ok := respCacheControl["max-age"]; ok {
		lifetime, err := time.ParseDuration(maxAge + "s")
		if err != nil {
			expires = now
		} else {
			expires = now.Add(lifetime)
		}
	} else {
		expiresHeader := r.Header.Get("Expires")
		if expiresHeader != "" {
			expires, err = time.Parse(time.RFC1123, expiresHeader)
			if err != nil {
				expires = now
			}
		}
	}
	return expires
}

func strlen(s string) int {
	return utf8.RuneCountInString(s)
}

// GenericOpenAPIError Provides access to the body, error and model on returned errors.
type GenericOpenAPIError struct {
	body  []byte
	error string
	model interface{}
}

// Error returns non-empty string if there was an error.
func (e GenericOpenAPIError) Error() string {
	return e.error + ", body: " + string(e.body)
}

// Body returns the raw bytes of the response
func (e GenericOpenAPIError) Body() []byte {
	return e.body
}

// Model returns the unpacked model of the error
func (e GenericOpenAPIError) Model() interface{} {
	return e.model
}