2020-08-18 04:23:45 +00:00
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/*
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* MinIO Go Library for Amazon S3 Compatible Cloud Storage
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* Copyright 2020 MinIO, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// Package lifecycle contains all the lifecycle related data types and marshallers.
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package lifecycle
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import (
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"encoding/xml"
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"time"
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)
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// AbortIncompleteMultipartUpload structure, not supported yet on MinIO
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type AbortIncompleteMultipartUpload struct {
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XMLName xml.Name `xml:"AbortIncompleteMultipartUpload,omitempty" json:"-"`
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DaysAfterInitiation ExpirationDays `xml:"DaysAfterInitiation,omitempty" json:"DaysAfterInitiation,omitempty"`
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}
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// IsDaysNull returns true if days field is null
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func (n AbortIncompleteMultipartUpload) IsDaysNull() bool {
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return n.DaysAfterInitiation == ExpirationDays(0)
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}
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// MarshalXML if days after initiation is set to non-zero value
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func (n AbortIncompleteMultipartUpload) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
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if n.IsDaysNull() {
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return nil
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}
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type abortIncompleteMultipartUploadWrapper AbortIncompleteMultipartUpload
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return e.EncodeElement(abortIncompleteMultipartUploadWrapper(n), start)
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}
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// NoncurrentVersionExpiration - Specifies when noncurrent object versions expire.
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// Upon expiration, server permanently deletes the noncurrent object versions.
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// Set this lifecycle configuration action on a bucket that has versioning enabled
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// (or suspended) to request server delete noncurrent object versions at a
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// specific period in the object's lifetime.
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type NoncurrentVersionExpiration struct {
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XMLName xml.Name `xml:"NoncurrentVersionExpiration" json:"-"`
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NoncurrentDays ExpirationDays `xml:"NoncurrentDays,omitempty"`
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}
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// MarshalXML if non-current days not set to non zero value
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func (n NoncurrentVersionExpiration) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
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if n.IsDaysNull() {
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return nil
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}
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type noncurrentVersionExpirationWrapper NoncurrentVersionExpiration
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return e.EncodeElement(noncurrentVersionExpirationWrapper(n), start)
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}
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// IsDaysNull returns true if days field is null
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func (n NoncurrentVersionExpiration) IsDaysNull() bool {
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return n.NoncurrentDays == ExpirationDays(0)
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}
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2021-01-28 16:56:38 +00:00
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// NoncurrentVersionTransition structure, set this action to request server to
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// transition noncurrent object versions to different set storage classes
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// at a specific period in the object's lifetime.
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type NoncurrentVersionTransition struct {
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XMLName xml.Name `xml:"NoncurrentVersionTransition,omitempty" json:"-"`
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StorageClass string `xml:"StorageClass,omitempty" json:"StorageClass,omitempty"`
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NoncurrentDays ExpirationDays `xml:"NoncurrentDays,omitempty" json:"NoncurrentDays,omitempty"`
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}
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// IsDaysNull returns true if days field is null
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func (n NoncurrentVersionTransition) IsDaysNull() bool {
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return n.NoncurrentDays == ExpirationDays(0)
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}
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2020-08-18 04:23:45 +00:00
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// MarshalXML is extended to leave out
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// <NoncurrentVersionTransition></NoncurrentVersionTransition> tags
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func (n NoncurrentVersionTransition) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
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2021-01-28 16:56:38 +00:00
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if n.IsDaysNull() {
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2020-08-18 04:23:45 +00:00
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return nil
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}
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2021-01-28 16:56:38 +00:00
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type noncurrentVersionTransitionWrapper NoncurrentVersionTransition
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return e.EncodeElement(noncurrentVersionTransitionWrapper(n), start)
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2020-08-18 04:23:45 +00:00
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}
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// Tag structure key/value pair representing an object tag to apply lifecycle configuration
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type Tag struct {
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XMLName xml.Name `xml:"Tag,omitempty" json:"-"`
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Key string `xml:"Key,omitempty" json:"Key,omitempty"`
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Value string `xml:"Value,omitempty" json:"Value,omitempty"`
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}
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// IsEmpty returns whether this tag is empty or not.
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func (tag Tag) IsEmpty() bool {
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return tag.Key == ""
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}
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// Transition structure - transition details of lifecycle configuration
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type Transition struct {
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XMLName xml.Name `xml:"Transition" json:"-"`
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Date ExpirationDate `xml:"Date,omitempty" json:"Date,omitempty"`
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StorageClass string `xml:"StorageClass,omitempty" json:"StorageClass,omitempty"`
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Days ExpirationDays `xml:"Days,omitempty" json:"Days,omitempty"`
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}
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// IsDaysNull returns true if days field is null
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func (t Transition) IsDaysNull() bool {
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return t.Days == ExpirationDays(0)
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}
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// IsDateNull returns true if date field is null
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func (t Transition) IsDateNull() bool {
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return t.Date.Time.IsZero()
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}
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// IsNull returns true if both date and days fields are null
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func (t Transition) IsNull() bool {
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return t.IsDaysNull() && t.IsDateNull()
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}
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// MarshalXML is transition is non null
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func (t Transition) MarshalXML(en *xml.Encoder, startElement xml.StartElement) error {
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if t.IsNull() {
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return nil
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}
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type transitionWrapper Transition
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return en.EncodeElement(transitionWrapper(t), startElement)
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}
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// And And Rule for LifecycleTag, to be used in LifecycleRuleFilter
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type And struct {
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XMLName xml.Name `xml:"And,omitempty" json:"-"`
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Prefix string `xml:"Prefix,omitempty" json:"Prefix,omitempty"`
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Tags []Tag `xml:"Tag,omitempty" json:"Tags,omitempty"`
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}
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// IsEmpty returns true if Tags field is null
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func (a And) IsEmpty() bool {
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return len(a.Tags) == 0 && a.Prefix == ""
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}
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// Filter will be used in selecting rule(s) for lifecycle configuration
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type Filter struct {
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XMLName xml.Name `xml:"Filter" json:"-"`
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And And `xml:"And,omitempty" json:"And,omitempty"`
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Prefix string `xml:"Prefix,omitempty" json:"Prefix,omitempty"`
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2020-11-29 20:54:08 +00:00
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Tag Tag `xml:"Tag,omitempty" json:"Tag,omitempty"`
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}
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// MarshalXML - produces the xml representation of the Filter struct
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// only one of Prefix, And and Tag should be present in the output.
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func (f Filter) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
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if err := e.EncodeToken(start); err != nil {
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return err
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}
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switch {
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case !f.And.IsEmpty():
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if err := e.EncodeElement(f.And, xml.StartElement{Name: xml.Name{Local: "And"}}); err != nil {
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return err
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}
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case !f.Tag.IsEmpty():
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if err := e.EncodeElement(f.Tag, xml.StartElement{Name: xml.Name{Local: "Tag"}}); err != nil {
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return err
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}
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default:
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// Always print Prefix field when both And & Tag are empty
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if err := e.EncodeElement(f.Prefix, xml.StartElement{Name: xml.Name{Local: "Prefix"}}); err != nil {
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return err
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}
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}
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return e.EncodeToken(xml.EndElement{Name: start.Name})
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}
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// ExpirationDays is a type alias to unmarshal Days in Expiration
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type ExpirationDays int
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// MarshalXML encodes number of days to expire if it is non-zero and
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// encodes empty string otherwise
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func (eDays ExpirationDays) MarshalXML(e *xml.Encoder, startElement xml.StartElement) error {
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if eDays == 0 {
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return nil
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}
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return e.EncodeElement(int(eDays), startElement)
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}
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// ExpirationDate is a embedded type containing time.Time to unmarshal
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// Date in Expiration
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type ExpirationDate struct {
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time.Time
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}
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// MarshalXML encodes expiration date if it is non-zero and encodes
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// empty string otherwise
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func (eDate ExpirationDate) MarshalXML(e *xml.Encoder, startElement xml.StartElement) error {
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if eDate.Time.IsZero() {
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return nil
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}
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return e.EncodeElement(eDate.Format(time.RFC3339), startElement)
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}
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// ExpireDeleteMarker represents value of ExpiredObjectDeleteMarker field in Expiration XML element.
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type ExpireDeleteMarker bool
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// MarshalXML encodes delete marker boolean into an XML form.
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func (b ExpireDeleteMarker) MarshalXML(e *xml.Encoder, startElement xml.StartElement) error {
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if !b {
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return nil
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}
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type expireDeleteMarkerWrapper ExpireDeleteMarker
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return e.EncodeElement(expireDeleteMarkerWrapper(b), startElement)
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}
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2021-02-17 03:47:24 +00:00
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// IsEnabled returns true if the auto delete-marker expiration is enabled
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func (b ExpireDeleteMarker) IsEnabled() bool {
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return bool(b)
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}
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2020-08-18 04:23:45 +00:00
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// Expiration structure - expiration details of lifecycle configuration
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type Expiration struct {
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XMLName xml.Name `xml:"Expiration,omitempty" json:"-"`
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Date ExpirationDate `xml:"Date,omitempty" json:"Date,omitempty"`
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Days ExpirationDays `xml:"Days,omitempty" json:"Days,omitempty"`
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DeleteMarker ExpireDeleteMarker `xml:"ExpiredObjectDeleteMarker,omitempty"`
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}
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// IsDaysNull returns true if days field is null
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func (e Expiration) IsDaysNull() bool {
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return e.Days == ExpirationDays(0)
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}
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// IsDateNull returns true if date field is null
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func (e Expiration) IsDateNull() bool {
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return e.Date.Time.IsZero()
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}
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2021-02-17 03:47:24 +00:00
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// IsDeleteMarkerExpirationEnabled returns true if the auto-expiration of delete marker is enabled
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func (e Expiration) IsDeleteMarkerExpirationEnabled() bool {
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return e.DeleteMarker.IsEnabled()
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}
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2020-08-18 04:23:45 +00:00
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// IsNull returns true if both date and days fields are null
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func (e Expiration) IsNull() bool {
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2021-02-17 03:47:24 +00:00
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return e.IsDaysNull() && e.IsDateNull() && !e.IsDeleteMarkerExpirationEnabled()
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2020-08-18 04:23:45 +00:00
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}
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// MarshalXML is expiration is non null
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func (e Expiration) MarshalXML(en *xml.Encoder, startElement xml.StartElement) error {
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if e.IsNull() {
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return nil
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}
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type expirationWrapper Expiration
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return en.EncodeElement(expirationWrapper(e), startElement)
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}
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// Rule represents a single rule in lifecycle configuration
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type Rule struct {
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XMLName xml.Name `xml:"Rule,omitempty" json:"-"`
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AbortIncompleteMultipartUpload AbortIncompleteMultipartUpload `xml:"AbortIncompleteMultipartUpload,omitempty" json:"AbortIncompleteMultipartUpload,omitempty"`
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Expiration Expiration `xml:"Expiration,omitempty" json:"Expiration,omitempty"`
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ID string `xml:"ID" json:"ID"`
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RuleFilter Filter `xml:"Filter,omitempty" json:"Filter,omitempty"`
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NoncurrentVersionExpiration NoncurrentVersionExpiration `xml:"NoncurrentVersionExpiration,omitempty" json:"NoncurrentVersionExpiration,omitempty"`
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NoncurrentVersionTransition NoncurrentVersionTransition `xml:"NoncurrentVersionTransition,omitempty" json:"NoncurrentVersionTransition,omitempty"`
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Prefix string `xml:"Prefix,omitempty" json:"Prefix,omitempty"`
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Status string `xml:"Status" json:"Status"`
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Transition Transition `xml:"Transition,omitempty" json:"Transition,omitempty"`
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}
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// Configuration is a collection of Rule objects.
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type Configuration struct {
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XMLName xml.Name `xml:"LifecycleConfiguration,omitempty" json:"-"`
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Rules []Rule `xml:"Rule"`
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}
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// Empty check if lifecycle configuration is empty
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func (c *Configuration) Empty() bool {
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if c == nil {
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return true
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}
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return len(c.Rules) == 0
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}
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// NewConfiguration initializes a fresh lifecycle configuration
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// for manipulation, such as setting and removing lifecycle rules
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// and filters.
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func NewConfiguration() *Configuration {
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return &Configuration{}
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}
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