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/
configuration.go
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/
configuration.go
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package models
import (
"encoding/xml"
"strings"
"time"
"github.com/minio/minio/pkg/event"
"github.com/minio/minio/pkg/wildcard"
)
type Model struct {
ID uint `gorm:"primary_key" xml:"-"`
CreatedAt time.Time `xml:"-"`
UpdatedAt time.Time `xml:"-"`
DeletedAt *time.Time `xml:"-" sql:"index"`
}
type Event struct {
Model
Name event.Name
QueueID uint `xml:"-"`
TopicID uint `xml:"-"`
}
// MarshalXML - encodes to XML data.
func (event *Event) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
return e.EncodeElement(event.Name.String(), start)
}
func (e *Event) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
var s string
if err := d.DecodeElement(&s, &start); err != nil {
return err
}
eventName, err := event.ParseName(s)
if err != nil {
return err
}
e.Name = eventName
return nil
}
type FilterRule struct {
Model
Name string `xml:"Name"`
Value string `xml:"Value"`
FilterRuleListID uint `xml:"-"`
}
// UnmarshalXML - decodes XML data.
func (filter *FilterRule) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
// Make subtype to avoid recursive UnmarshalXML().
type filterRule FilterRule
rule := filterRule{}
if err := d.DecodeElement(&rule, &start); err != nil {
return err
}
*filter = FilterRule(rule)
return nil
}
type FilterRuleList struct {
Model
Rules []FilterRule `xml:"FilterRule,omitempty"`
S3KeyID uint
}
// UnmarshalXML - decodes XML data.
func (ruleList *FilterRuleList) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
// Make subtype to avoid recursive UnmarshalXML().
type filterRuleList FilterRuleList
rules := filterRuleList{}
if err := d.DecodeElement(&rules, &start); err != nil {
return err
}
*ruleList = FilterRuleList(rules)
return nil
}
// Pattern - returns pattern using prefix and suffix values.
func (ruleList FilterRuleList) Pattern() string {
var prefix string
var suffix string
for _, rule := range ruleList.Rules {
switch rule.Name {
case "prefix":
prefix = rule.Value
case "suffix":
suffix = rule.Value
}
}
return NewPattern(prefix, suffix)
}
// NewPattern - create new pattern for prefix/suffix.
func NewPattern(prefix, suffix string) (pattern string) {
if prefix != "" {
if !strings.HasSuffix(prefix, "*") {
prefix += "*"
}
pattern = prefix
}
if suffix != "" {
if !strings.HasPrefix(suffix, "*") {
suffix = "*" + suffix
}
pattern += suffix
}
pattern = strings.Replace(pattern, "**", "*", -1)
return pattern
}
type S3Key struct {
Model
RuleList FilterRuleList `xml:"S3Key,omitempty"`
QueueID uint
TopicID uint
}
func (q Queue) ToRulesMap() RulesMap {
pattern := q.Filter.RuleList.Pattern()
names := make([]event.Name, len(q.Events))
for _, e := range q.Events {
names = append(names, e.Name)
}
return NewRulesMap(names, pattern, q.Resource)
}
type Queue struct {
Model
QueueIdentifier string `xml:"Id"`
Filter S3Key `xml:"Filter"`
Events []Event `xml:"Event"`
ARN string `xml:"Queue"`
Resource Resource `xml:"-"`
ResourceID uint `xml:"-"`
ConfigID uint `xml:"-"`
}
// UnmarshalXML - decodes XML data.
func (q *Queue) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
// Make subtype to avoid recursive UnmarshalXML().
type queue Queue
parsedQueue := queue{}
if err := d.DecodeElement(&parsedQueue, &start); err != nil {
return err
}
*q = Queue(parsedQueue)
return nil
}
type Topic struct {
Model
TopicIdentifier string `xml:"Id"`
Filter S3Key `xml:"Filter"`
Events []Event `xml:"Event"`
ARN string `xml:"Topic"`
Resource Resource `xml:"-"`
ResourceID uint `xml:"-"`
ConfigID uint `xml:"-"`
}
func (t Topic) ToRulesMap() RulesMap {
pattern := t.Filter.RuleList.Pattern()
names := make([]event.Name, len(t.Events))
for _, e := range t.Events {
names = append(names, e.Name)
}
return NewRulesMap(names, pattern, t.Resource)
}
type Config struct {
Model
Bucket string `xml:"-" gorm:"unique;not null"`
XMLName xml.Name `xml:"NotificationConfiguration"`
Queues []Queue `xml:"QueueConfiguration,omitempty"`
Topics []Topic `xml:"TopicConfiguration,omitempty"`
}
// UnmarshalXML - decodes XML data.
func (conf *Config) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
// Make subtype to avoid recursive UnmarshalXML().
type config Config
parsedConfig := config{}
if err := d.DecodeElement(&parsedConfig, &start); err != nil {
return err
}
*conf = Config(parsedConfig)
return nil
}
func (conf Config) ToRulesMap() RulesMap {
rulesMap := make(RulesMap)
for _, queue := range conf.Queues {
rulesMap.Add(queue.ToRulesMap())
}
for _, topic := range conf.Topics {
rulesMap.Add(topic.ToRulesMap())
}
return rulesMap
}
type Rules map[string][]Resource
// Match - returns []Resource matching object name in rules.
func (rules Rules) Match(objectName string) []Resource {
var matched []Resource
for pattern, resources := range rules {
if wildcard.MatchSimple(pattern, objectName) {
for _, resource := range resources {
matched = append(matched, resource)
}
}
}
return matched
}
// Clone - returns copy of this rules.
func (rules Rules) Clone() Rules {
rulesCopy := make(Rules)
for pattern, resource := range rules {
rulesCopy[pattern] = resource
}
return rulesCopy
}
// Union - returns union with given rules as new rules.
func (rules Rules) Union(rules2 Rules) Rules {
nrules := rules.Clone()
for pattern, resources := range rules2 {
for _, resource := range resources {
nrules[pattern] = append(nrules[pattern], resource)
}
}
return nrules
}
type RulesMap map[event.Name]Rules
// add - adds event names, prefixes, suffixes and resource to rules map.
func (rulesMap RulesMap) add(eventNames []event.Name, pattern string, resource Resource) {
rules := make(Rules)
rules[pattern] = append(rules[pattern], resource)
for _, eventName := range eventNames {
for _, name := range eventName.Expand() {
rulesMap[name] = rulesMap[name].Union(rules)
}
}
}
// Add - adds given rules map.
func (rulesMap RulesMap) Add(rulesMap2 RulesMap) {
for eventName, rules := range rulesMap2 {
rulesMap[eventName] = rules.Union(rulesMap[eventName])
}
}
// NewRulesMap - creates new rules map with given values.
func NewRulesMap(eventNames []event.Name, pattern string, resource Resource) RulesMap {
// If pattern is empty, add '*' wildcard to match all.
if pattern == "" {
pattern = "*"
}
rulesMap := make(RulesMap)
rulesMap.add(eventNames, pattern, resource)
return rulesMap
}