errors.go

package imaging

import (
	"encoding/json"
	"errors"
	"fmt"
	"io/ioutil"
	"net/http"

	"github.com/akamai/AkamaiOPEN-edgegrid-golang/v9/pkg/errs"
)

type (
	// Error is an Image and Video Manager error implementation
	Error struct {
		Type            string            `json:"type,omitempty"`
		Title           string            `json:"title,omitempty"`
		Detail          string            `json:"detail,omitempty"`
		Instance        string            `json:"instance,omitempty"`
		Status          int               `json:"status,omitempty"`
		ProblemID       string            `json:"problemId,omitempty"`
		RequestID       string            `json:"requestId,omitempty"`
		IllegalValue    string            `json:"illegalValue,omitempty"`
		ParameterName   string            `json:"parameterName,omitempty"`
		ExtensionFields map[string]string `json:"extensionFields,omitempty"`
		Method          string            `json:"method,omitempty"`
		ServerIP        string            `json:"serverIp,omitempty"`
		ClientIP        string            `json:"clientIp,omitempty"`
		RequestTime     string            `json:"requestTime,omitempty"`
		AuthzRealm      string            `json:"authzRealm,omitempty"`
	}
)

// Error parses an error from the response
func (i *imaging) Error(r *http.Response) error {
	var e Error
	var body []byte
	body, err := ioutil.ReadAll(r.Body)
	if err != nil {
		i.Log(r.Request.Context()).Errorf("reading error response body: %s", err)
		e.Status = r.StatusCode
		e.Title = "Failed to read error body"
		e.Detail = err.Error()
		return &e
	}

	if err := json.Unmarshal(body, &e); err != nil {
		i.Log(r.Request.Context()).Errorf("could not unmarshal API error: %s", err)
		e.Title = "Failed to unmarshal error body. Image & Video Manager API failed. Check details for more information."
		e.Detail = errs.UnescapeContent(string(body))
		e.Status = r.StatusCode
	}
	return &e
}

func (e *Error) Error() string {
	msg, err := json.MarshalIndent(e, "", "\t")
	if err != nil {
		return fmt.Sprintf("error marshaling API error: %s", err)
	}
	return fmt.Sprintf("API error: \n%s", msg)
}

// Is handles error comparisons
func (e *Error) Is(target error) bool {
	var t *Error
	if !errors.As(target, &t) {
		return false
	}

	if e == t {
		return true
	}

	if e.Status != t.Status {
		return false
	}

	return e.Error() == t.Error()
}