feat: Inital commit

vendor/github.com/nlnwa/whatwg-url/errors/errors.go

@@ -0,0 +1,163 @@
+/*
+ * Copyright 2020 National Library of Norway.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package errors
+
+import (
+	"fmt"
+)
+
+// ValidationError indicates that the url is not valid
+type ValidationError struct {
+	errorType ErrorType
+	cause     error  // the root cause for this error
+	descr     string // description of the error
+	failure   bool   // true if the error is a failure, false if it is a warning
+	url       string
+}
+
+func (e *ValidationError) Error() string {
+	errMsg := fmt.Sprintf("Error: %s", e.errorType)
+	if e.descr != "" {
+		errMsg += fmt.Sprintf(": '%s'", e.descr)
+	}
+	if e.url != "" {
+		errMsg += fmt.Sprintf(". Url: '%s'", e.url)
+	}
+	if nil == e.cause {
+		return errMsg
+	}
+
+	return errMsg + ", Cause: " + e.cause.Error()
+}
+
+// Unwrap returns the root cause for this error
+func (e *ValidationError) Unwrap() error {
+	return e.cause
+}
+
+// Type returns the error type
+func (e *ValidationError) Type() ErrorType {
+	return e.errorType
+}
+
+// Url returns the url causing the error
+func (e *ValidationError) Url() string {
+	return e.url
+}
+
+// Failure returns true if the error is a failure, false if it is a warning
+func (e *ValidationError) Failure() bool {
+	return e.failure
+}
+
+// Description returns the error description
+func (e *ValidationError) Description() string {
+	return e.descr
+}
+
+// Type returns the error type
+func Type(err error) ErrorType {
+	type typer interface {
+		Type() ErrorType
+	}
+
+	cd, ok := err.(typer)
+	if !ok {
+		return ""
+	}
+	return cd.Type()
+}
+
+// Description returns the error description
+func Description(err error) string {
+	type descr interface {
+		Description() string
+	}
+
+	m, ok := err.(descr)
+	if !ok {
+		return ""
+	}
+	return m.Description()
+}
+
+// Url returns the url causing the error
+func Url(err error) string {
+	type url interface {
+		Url() string
+	}
+
+	m, ok := err.(url)
+	if !ok {
+		return ""
+	}
+	return m.Url()
+}
+
+// Failure returns true if the error is a failure, false if it is a warning.
+// If the error does not implement the Failure() method, true is returned
+func Failure(err error) bool {
+	type failure interface {
+		Failure() bool
+	}
+
+	m, ok := err.(failure)
+	if !ok {
+		return true
+	}
+	return m.Failure()
+}
+
+// Error constructs a new error
+func Error(errorType ErrorType, url string, failure bool) error {
+	return &ValidationError{
+		errorType: errorType,
+		url:       url,
+		failure:   failure,
+	}
+}
+
+// ErrorWithDescr constructs a new error
+func ErrorWithDescr(errorType ErrorType, descr string, url string, failure bool) error {
+	return &ValidationError{
+		errorType: errorType,
+		descr:     descr,
+		url:       url,
+		failure:   failure,
+	}
+}
+
+// Wrap wraps an error with an error code and url
+func Wrap(err error, errorType ErrorType, url string, failure bool) error {
+	return &ValidationError{
+		errorType: errorType,
+		url:       url,
+		cause:     err,
+		failure:   failure,
+	}
+}
+
+// WrapWithDescr wraps an error with an error code, url and a description
+func WrapWithDescr(err error, errorType ErrorType, descr string, url string, failure bool) error {
+	return &ValidationError{
+		errorType: errorType,
+		descr:     descr,
+		url:       url,
+		cause:     err,
+		failure:   failure,
+	}
+}