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almaerror.go
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/
almaerror.go
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// Copyright 2024 Carleton University Library All rights reserved.
// Use of this source code is governed by the MIT
// license that can be found in the LICENSE file.
package main
import (
"encoding/xml"
"errors"
"fmt"
)
// ErrAPIError is an error which is used when the Alma API returns an error.
var ErrAPIError = errors.New("an API error occurred")
// APIError is a struct which stores the data from Alma API errors.
type APIError struct {
XMLName xml.Name `xml:"web_service_result"`
ErrorList []struct {
Error struct {
ErrorCode string `xml:"errorCode"`
ErrorMessage string `xml:"errorMessage"`
} `xml:"error"`
} `xml:"errorList"`
}
// Collapse is a method on APIErrors which returns the first APIError as
// a Go error. This was done this way because the API returns different
// error codes which mean the same thing.
func (e *APIError) Collapse() error {
if len(e.ErrorList) > 0 {
return fmt.Errorf("%w: %v - %v", ErrAPIError, e.ErrorList[0].Error.ErrorCode, e.ErrorList[0].Error.ErrorMessage)
}
return fmt.Errorf("%w: unknown error", ErrAPIError)
}