mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-27 06:06:38 +00:00
109 lines
2.2 KiB
Go
109 lines
2.2 KiB
Go
|
// Copyright (C) MongoDB, Inc. 2017-present.
|
||
|
|
//
|
||
|
|
// 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
|
||
|
|
|
||
|
|
package bsonrw
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
)
|
||
|
|
|
||
|
|
type mode int
|
||
|
|
|
||
|
|
const (
|
||
|
|
_ mode = iota
|
||
|
|
mTopLevel
|
||
|
|
mDocument
|
||
|
|
mArray
|
||
|
|
mValue
|
||
|
|
mElement
|
||
|
|
mCodeWithScope
|
||
|
|
mSpacer
|
||
|
|
)
|
||
|
|
|
||
|
|
func (m mode) String() string {
|
||
|
|
var str string
|
||
|
|
|
||
|
|
switch m {
|
||
|
|
case mTopLevel:
|
||
|
|
str = "TopLevel"
|
||
|
|
case mDocument:
|
||
|
|
str = "DocumentMode"
|
||
|
|
case mArray:
|
||
|
|
str = "ArrayMode"
|
||
|
|
case mValue:
|
||
|
|
str = "ValueMode"
|
||
|
|
case mElement:
|
||
|
|
str = "ElementMode"
|
||
|
|
case mCodeWithScope:
|
||
|
|
str = "CodeWithScopeMode"
|
||
|
|
case mSpacer:
|
||
|
|
str = "CodeWithScopeSpacerFrame"
|
||
|
|
default:
|
||
|
|
str = "UnknownMode"
|
||
|
|
}
|
||
|
|
|
||
|
|
return str
|
||
|
|
}
|
||
|
|
|
||
|
|
func (m mode) TypeString() string {
|
||
|
|
var str string
|
||
|
|
|
||
|
|
switch m {
|
||
|
|
case mTopLevel:
|
||
|
|
str = "TopLevel"
|
||
|
|
case mDocument:
|
||
|
|
str = "Document"
|
||
|
|
case mArray:
|
||
|
|
str = "Array"
|
||
|
|
case mValue:
|
||
|
|
str = "Value"
|
||
|
|
case mElement:
|
||
|
|
str = "Element"
|
||
|
|
case mCodeWithScope:
|
||
|
|
str = "CodeWithScope"
|
||
|
|
case mSpacer:
|
||
|
|
str = "CodeWithScopeSpacer"
|
||
|
|
default:
|
||
|
|
str = "Unknown"
|
||
|
|
}
|
||
|
|
|
||
|
|
return str
|
||
|
|
}
|
||
|
|
|
||
|
|
// TransitionError is an error returned when an invalid progressing a
|
||
|
|
// ValueReader or ValueWriter state machine occurs.
|
||
|
|
// If read is false, the error is for writing
|
||
|
|
type TransitionError struct {
|
||
|
|
name string
|
||
|
|
parent mode
|
||
|
|
current mode
|
||
|
|
destination mode
|
||
|
|
modes []mode
|
||
|
|
action string
|
||
|
|
}
|
||
|
|
|
||
|
|
func (te TransitionError) Error() string {
|
||
|
|
errString := fmt.Sprintf("%s can only %s", te.name, te.action)
|
||
|
|
if te.destination != mode(0) {
|
||
|
|
errString = fmt.Sprintf("%s a %s", errString, te.destination.TypeString())
|
||
|
|
}
|
||
|
|
errString = fmt.Sprintf("%s while positioned on a", errString)
|
||
|
|
for ind, m := range te.modes {
|
||
|
|
if ind != 0 && len(te.modes) > 2 {
|
||
|
|
errString = fmt.Sprintf("%s,", errString)
|
||
|
|
}
|
||
|
|
if ind == len(te.modes)-1 && len(te.modes) > 1 {
|
||
|
|
errString = fmt.Sprintf("%s or", errString)
|
||
|
|
}
|
||
|
|
errString = fmt.Sprintf("%s %s", errString, m.TypeString())
|
||
|
|
}
|
||
|
|
errString = fmt.Sprintf("%s but is positioned on a %s", errString, te.current.TypeString())
|
||
|
|
if te.parent != mode(0) {
|
||
|
|
errString = fmt.Sprintf("%s with parent %s", errString, te.parent.TypeString())
|
||
|
|
}
|
||
|
|
return errString
|
||
|
|
}
|