130 lines
4.2 KiB
Go
130 lines
4.2 KiB
Go
// GoToSocial
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// Copyright (C) GoToSocial Authors admin@gotosocial.org
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// SPDX-License-Identifier: AGPL-3.0-or-later
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package gtserror
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import (
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"codeberg.org/gruf/go-errors/v2"
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)
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// package private error key type.
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type errkey int
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// ErrorType denotes the type of an error, if set.
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type ErrorType string
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const (
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// error value keys.
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_ errkey = iota
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statusCodeKey
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notFoundKey
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errorTypeKey
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unrtrvableKey
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wrongTypeKey
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smtpKey
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malformedKey
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)
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// IsUnretrievable indicates that a call to retrieve a resource
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// (account, status, attachment, etc) could not be fulfilled,
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// either because it was not found locally, or because some
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// prerequisite remote resource call failed, making it impossible
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// to return the item.
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func IsUnretrievable(err error) bool {
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_, ok := errors.Value(err, unrtrvableKey).(struct{})
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return ok
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}
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// SetUnretrievable will wrap the given error to store an "unretrievable"
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// flag, returning wrapped error. See Unretrievable() for example use-cases.
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func SetUnretrievable(err error) error {
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return errors.WithValue(err, unrtrvableKey, struct{}{})
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}
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// IsWrongType checks error for a stored "wrong type" flag.
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// Wrong type indicates that an ActivityPub URI returned a
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// type we weren't expecting. For example:
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//
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// - HTML instead of JSON.
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// - Normal JSON instead of ActivityPub JSON.
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// - Statusable instead of Accountable.
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// - Accountable instead of Statusable.
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// - etc.
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func IsWrongType(err error) bool {
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_, ok := errors.Value(err, wrongTypeKey).(struct{})
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return ok
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}
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// SetWrongType will wrap the given error to store a "wrong type" flag,
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// returning wrapped error. See IsWrongType() for example use-cases.
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func SetWrongType(err error) error {
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return errors.WithValue(err, wrongTypeKey, struct{}{})
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}
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// StatusCode checks error for a stored status code value. For example
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// an error from an outgoing HTTP request may be stored, or an API handler
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// expected response status code may be stored.
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func StatusCode(err error) int {
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i, _ := errors.Value(err, statusCodeKey).(int)
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return i
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}
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// WithStatusCode will wrap the given error to store provided status code,
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// returning wrapped error. See StatusCode() for example use-cases.
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func WithStatusCode(err error, code int) error {
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return errors.WithValue(err, statusCodeKey, code)
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}
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// IsNotFound checks error for a stored "not found" flag. For
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// example an error from an outgoing HTTP request due to DNS lookup.
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func IsNotFound(err error) bool {
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_, ok := errors.Value(err, notFoundKey).(struct{})
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return ok
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}
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// SetNotFound will wrap the given error to store a "not found" flag,
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// returning wrapped error. See IsNotFound() for example use-cases.
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func SetNotFound(err error) error {
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return errors.WithValue(err, notFoundKey, struct{}{})
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}
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// IsSMTP checks error for a stored "smtp" flag. For
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// example an error from outgoing SMTP email attempt.
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func IsSMTP(err error) bool {
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_, ok := errors.Value(err, smtpKey).(struct{})
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return ok
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}
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// SetSMTP will wrap the given error to store an "smtp" flag,
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// returning wrapped error. See IsSMTP() for example use-cases.
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func SetSMTP(err error) error {
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return errors.WithValue(err, smtpKey, struct{}{})
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}
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// IsMalformed checks error for a stored "malformed" flag. For
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// example an error from an incoming ActivityStreams type conversion.
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func IsMalformed(err error) bool {
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_, ok := errors.Value(err, malformedKey).(struct{})
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return ok
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}
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// SetMalformed will wrap the given error to store a "malformed" flag,
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// returning wrapped error. See IsMalformed() for example use-cases.
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func SetMalformed(err error) error {
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return errors.WithValue(err, malformedKey, struct{}{})
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}
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