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feature: bcs-storage support custom resources and labelSelector for k…
…8s resources. issue TencentBlueKing#851 TencentBlueKing#852
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bcs-services/bcs-storage/storage/actions/lib/selector.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,200 @@ | ||
| /* | ||
| * Tencent is pleased to support the open source community by making Blueking Container Service available., | ||
| * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved. | ||
| * Licensed under the MIT License (the "License"); you may not use this file except | ||
| * in compliance with the License. You may obtain a copy of the License at | ||
| * http://opensource.org/licenses/MIT | ||
| * 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 lib | ||
|
|
||
| import ( | ||
| "github.com/Tencent/bk-bcs/bcs-common/common/blog" | ||
| "github.com/Tencent/bk-bcs/bcs-common/pkg/odm/operator" | ||
| ) | ||
|
|
||
| var opCharacterSet = []byte{'=', '!'} | ||
| var specialCharacterSet = []byte{',', '+', '(', ')'} | ||
|
|
||
| type Selector struct { | ||
| Prefix string | ||
| SelectorStr string | ||
| cursor int | ||
| conditions []*operator.Condition | ||
| } | ||
|
|
||
| // TODO: error operation | ||
| func (s *Selector) GetNextCondition() *operator.Condition { | ||
| if s.cursor >= len(s.SelectorStr) { | ||
| return nil | ||
| } | ||
| // get key | ||
| key := s.getWord(false) | ||
| if key == "" { | ||
| return nil | ||
| } | ||
| if s.Prefix != "" { | ||
| key = s.Prefix + key | ||
| } | ||
| // get op | ||
| op := s.getOperator() | ||
| blog.Infof("getOperator: %s", op) | ||
| // get value | ||
| var cond *operator.Condition | ||
| switch op { | ||
| case operator.Ext: | ||
| cond = operator.NewLeafCondition(op, operator.M{key: true}) | ||
| case operator.Eq, operator.Ne: | ||
| // get Value | ||
| value := s.getWord(false) | ||
| if value == "" { | ||
| return nil | ||
| } | ||
| cond = operator.NewLeafCondition(op, operator.M{key: value}) | ||
| case operator.In, operator.Nin: | ||
| wordList := s.getWordList() | ||
| if len(wordList) == 0 { | ||
| return nil | ||
| } | ||
| cond = operator.NewLeafCondition(op, operator.M{key: wordList}) | ||
| } | ||
| s.conditions = append(s.conditions, cond) | ||
| blog.Infof("GetNextCondition: %+v", cond) | ||
| // get expression end (, or end of string) | ||
| s.getCharacter(',') | ||
| return cond | ||
| } | ||
|
|
||
| func (s *Selector) GetAllConditions() []*operator.Condition { | ||
| if s.conditions != nil { | ||
| return s.conditions | ||
| } | ||
| var cond *operator.Condition | ||
| for { | ||
| cond = s.GetNextCondition() | ||
| if cond == nil { | ||
| break | ||
| } | ||
| } | ||
| return s.conditions | ||
| } | ||
|
|
||
| func (s *Selector) Clear() { | ||
| s.cursor = 0 | ||
| s.conditions = nil | ||
| } | ||
|
|
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| func (s *Selector) getWord(isOperator bool) string { | ||
| if s.cursor >= len(s.SelectorStr) { | ||
| return "" | ||
| } | ||
| var word = make([]byte, 0) | ||
| for { | ||
| if s.cursor >= len(s.SelectorStr) { | ||
| break | ||
| } | ||
| c := s.SelectorStr[s.cursor] | ||
| if s.cursor >= len(s.SelectorStr) || | ||
| s.inSpecialCharacterSet(c) || | ||
| (!isOperator && s.inOPCharacterSet(c)) { | ||
| blog.Infof("break word: %v", c) | ||
| break | ||
| } | ||
| word = append(word, c) | ||
| s.cursor++ | ||
| } | ||
| blog.Infof("getWord %s", string(word)) | ||
| return string(word) | ||
| } | ||
|
|
||
| func (s *Selector) getWordList() []string { | ||
| // list start | ||
| if !s.getCharacter('(') { | ||
| return nil | ||
| } | ||
|
|
||
| wordList := make([]string, 0) | ||
| for { | ||
| word := s.getWord(false) | ||
| if word == "" { | ||
| return nil | ||
| } | ||
| wordList = append(wordList, word) | ||
| if !s.getCharacter(',') { | ||
| break | ||
| } | ||
| } | ||
|
|
||
| // list end | ||
| if !s.getCharacter(')') { | ||
| return nil | ||
| } | ||
| blog.Infof("getWordList %+v", wordList) | ||
| return wordList | ||
| } | ||
|
|
||
| func (s *Selector) getOperator() operator.Operator { | ||
| if s.cursor >= len(s.SelectorStr) { | ||
| return operator.Ext | ||
| } | ||
| if s.getCharacter(',') { | ||
| return operator.Ext | ||
| } | ||
| if s.getCharacter('=') { | ||
| return operator.Eq | ||
| } | ||
| if s.getCharacter('+') { | ||
| opstr := s.getWord(true) | ||
| var op operator.Operator | ||
| switch opstr { | ||
| case "in": | ||
| op = operator.In | ||
| case "notin": | ||
| op = operator.Nin | ||
| case "=", "==": | ||
| op = operator.Eq | ||
| case "!=": | ||
| op = operator.Ne | ||
| default: | ||
| // getOperator failed | ||
| return operator.Tr | ||
| } | ||
| if s.getCharacter('+') { | ||
| return op | ||
| } | ||
| } | ||
| return operator.Tr | ||
| } | ||
|
|
||
| func (s *Selector) getCharacter(standard byte) bool { | ||
| if s.cursor >= len(s.SelectorStr) { | ||
| return false | ||
| } | ||
| if s.SelectorStr[s.cursor] == standard { | ||
| s.cursor++ | ||
| return true | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| func (s *Selector) inSpecialCharacterSet(c byte) bool { | ||
| for _, sc := range specialCharacterSet { | ||
| if c == sc { | ||
| return true | ||
| } | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| func (s *Selector) inOPCharacterSet(c byte) bool { | ||
| for _, sc := range opCharacterSet { | ||
| if c == sc { | ||
| return true | ||
| } | ||
| } | ||
| return false | ||
| } |
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