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wcategorization.go
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wcategorization.go
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package websitecategorization
import (
"bytes"
"context"
"encoding/json"
"fmt"
"net/http"
"net/url"
)
// WCategorizationService is an interface for Website Categorization API.
type WCategorizationService interface {
// Get returns parsed Website Categorization API response.
Get(ctx context.Context, domainName string, opts ...Option) (*WCategorizationResponse, *Response, error)
// GetRaw returns raw Website Categorization API response as the Response struct with Body saved as a byte slice.
GetRaw(ctx context.Context, domainName string, opts ...Option) (*Response, error)
// GetAllCategories returns all possible categories.
GetAllCategories(ctx context.Context, opts ...Option) (categories []CategoryItem, response *Response, err error)
// GetAllCategoriesRaw returns all possible categories as a raw API response.
GetAllCategoriesRaw(ctx context.Context, opts ...Option) (response *Response, err error)
}
// Response is the http.Response wrapper with Body saved as a byte slice.
type Response struct {
*http.Response
// Body is the byte slice representation of http.Response Body
Body []byte
}
// wCategorizationServiceOp is the type implementing the WCategorization interface.
type wCategorizationServiceOp struct {
client *Client
baseURL *url.URL
}
var _ WCategorizationService = &wCategorizationServiceOp{}
// newRequest creates the API request with default parameters and the specified apiKey.
func (service wCategorizationServiceOp) newRequest() (*http.Request, error) {
req, err := service.client.NewRequest(http.MethodGet, service.baseURL, nil)
if err != nil {
return nil, err
}
query := url.Values{}
query.Set("apiKey", service.client.apiKey)
req.URL.RawQuery = query.Encode()
return req, nil
}
// apiResponse is used for parsing Website Categorization API response as a model instance.
type apiResponse struct {
WCategorizationResponse
ErrorMessage
}
// requestCategories returns intermediate API response for the /categories path.
func (service wCategorizationServiceOp) requestCategories(ctx context.Context, opts ...Option) (*Response, error) {
categoriesURL := service.baseURL
categoriesURL.Path += "/categories"
req, err := service.client.NewRequest(http.MethodGet, categoriesURL, nil)
if err != nil {
return nil, err
}
resp, err := service.request(ctx, req, opts...)
if err != nil {
return nil, err
}
return resp, nil
}
// requestBase returns intermediate API response for the base path.
func (service wCategorizationServiceOp) requestBase(ctx context.Context, domainName string, opts ...Option) (*Response, error) {
if domainName == "" {
return nil, &ArgError{"domainName", "can not be empty"}
}
req, err := service.newRequest()
if err != nil {
return nil, err
}
q := req.URL.Query()
q.Set("domainName", domainName)
req.URL.RawQuery = q.Encode()
resp, err := service.request(ctx, req, opts...)
if err != nil {
return nil, err
}
return resp, nil
}
// request returns intermediate API response for further actions.
func (service wCategorizationServiceOp) request(ctx context.Context, req *http.Request, opts ...Option) (*Response, error) {
q := req.URL.Query()
for _, opt := range opts {
opt(q)
}
req.URL.RawQuery = q.Encode()
var b bytes.Buffer
resp, err := service.client.Do(ctx, req, &b)
if err != nil {
return &Response{
Response: resp,
Body: b.Bytes(),
}, err
}
return &Response{
Response: resp,
Body: b.Bytes(),
}, nil
}
// parse parses raw Website Categorization API response.
func parse(raw []byte) (*apiResponse, error) {
var response apiResponse
err := json.NewDecoder(bytes.NewReader(raw)).Decode(&response)
if err != nil {
return nil, fmt.Errorf("cannot parse response: %w", err)
}
return &response, nil
}
// parseCategories parses raw Website Categorization API response with an array of categories.
func parseCategories(raw []byte) ([]CategoryItem, error) {
var respCategories []CategoryItem
err := json.NewDecoder(bytes.NewReader(raw)).Decode(&respCategories)
if err != nil {
return nil, fmt.Errorf("cannot parse response: %w", err)
}
return respCategories, nil
}
// Get returns parsed Website Categorization API response.
func (service wCategorizationServiceOp) Get(
ctx context.Context,
domainName string,
opts ...Option,
) (wCategorizationResponse *WCategorizationResponse, resp *Response, err error) {
optsJSON := make([]Option, 0, len(opts)+1)
optsJSON = append(optsJSON, opts...)
optsJSON = append(optsJSON, OptionOutputFormat("JSON"))
resp, err = service.requestBase(ctx, domainName, optsJSON...)
if err != nil {
return nil, resp, err
}
wCategorizationResp, err := parse(resp.Body)
if err != nil {
return nil, resp, err
}
if wCategorizationResp.Message != "" || wCategorizationResp.Code != 0 {
return nil, nil, &ErrorMessage{
Code: wCategorizationResp.Code,
Message: wCategorizationResp.Message,
}
}
return &wCategorizationResp.WCategorizationResponse, resp, nil
}
// GetRaw returns raw Website Categorization API response as the Response struct with Body saved as a byte slice.
func (service wCategorizationServiceOp) GetRaw(
ctx context.Context,
domainName string,
opts ...Option,
) (resp *Response, err error) {
resp, err = service.requestBase(ctx, domainName, opts...)
if err != nil {
return resp, err
}
if respErr := checkResponse(resp.Response); respErr != nil {
return resp, respErr
}
return resp, nil
}
// GetAllCategories returns all possible categories.
func (service wCategorizationServiceOp) GetAllCategories(ctx context.Context, opts ...Option) (
categories []CategoryItem, resp *Response, err error) {
optsJSON := make([]Option, 0, len(opts)+1)
optsJSON = append(optsJSON, opts...)
optsJSON = append(optsJSON, OptionOutputFormat("JSON"))
resp, err = service.requestCategories(ctx, optsJSON...)
if err != nil {
return nil, resp, err
}
respCategories, err := parseCategories(resp.Body)
if err != nil {
return nil, resp, err
}
return respCategories, resp, nil
}
// GetAllCategoriesRaw returns all possible categories as a raw API response.
func (service wCategorizationServiceOp) GetAllCategoriesRaw(ctx context.Context, opts ...Option) (
resp *Response, err error) {
resp, err = service.requestCategories(ctx, opts...)
if err != nil {
return resp, err
}
if respErr := checkResponse(resp.Response); respErr != nil {
return resp, respErr
}
return resp, nil
}
// ArgError is the argument error.
type ArgError struct {
Name string
Message string
}
// Error returns error message as a string.
func (a *ArgError) Error() string {
return `invalid argument: "` + a.Name + `" ` + a.Message
}