81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
/*
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* Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
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* Author: Alex Yatskov <alex@foosoft.net>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package main
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import (
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"encoding/json"
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"io/ioutil"
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"os"
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"strings"
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)
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type versionMetadata struct {
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Deleted []string `json:"deleted"`
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path string
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}
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func newVersionMetadata(path string) (*versionMetadata, error) {
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meta := &versionMetadata{path: path}
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if err := meta.load(); err != nil {
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return nil, err
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}
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return meta, nil
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}
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func (this *versionMetadata) filter(nodes map[string]versionedNode) {
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for _, delPath := range this.Deleted {
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for name, node := range nodes {
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if strings.HasPrefix(node.path, delPath) {
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delete(nodes, name)
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}
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}
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}
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}
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func (this *versionMetadata) load() error {
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if _, err := os.Stat(this.path); os.IsNotExist(err) {
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return nil
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}
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bytes, err := ioutil.ReadFile(this.path)
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if err != nil {
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return err
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}
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if err := json.Unmarshal(bytes, &this); err != nil {
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return err
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}
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return nil
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}
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func (this *versionMetadata) save() error {
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js, err := json.Marshal(this)
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if err != nil {
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return err
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}
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return ioutil.WriteFile(this.path, js, 0644)
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}
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