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import fs from 'fs'
import YAML from 'yaml'
import _ from 'lodash'
import chokidar from 'chokidar'
export default class YamlReader {
/**
* 读写yaml文件
*
* @param yamlPath yaml文件绝对路径
* @param isWatch 是否监听文件变化
*/
constructor(yamlPath, isWatch = false) {
this.yamlPath = yamlPath
this.isWatch = isWatch
this.initYaml()
}
initYaml() {
// parseDocument 将会保留注释
this.document = YAML.parseDocument(fs.readFileSync(this.yamlPath, 'utf8'))
if (this.isWatch && !this.watcher) {
this.watcher = chokidar.watch(this.yamlPath).on('change', () => {
if (this.isSave) {
this.isSave = false
return
}
this.initYaml()
})
}
}
/** 返回读取的对象 */
get jsonData() {
if (!this.document) {
return null
}
return this.document.toJSON()
}
/* 检查集合是否包含key的值 */
has(keyPath) {
return this.document.hasIn(keyPath.split('.'))
}
/* 返回key的值 */
get(keyPath) {
return _.get(this.jsonData, keyPath)
}
/* 修改某个key的值 */
set(keyPath, value) {
this.document.setIn([keyPath], value)
this.save()
}
/* 删除key */
delete(keyPath) {
this.document.deleteIn(keyPath.split('.'))
this.save()
}
// 数组添加数据
addIn(keyPath, value) {
this.document.addIn(keyPath.split('.'), value)
this.save()
}
// 彻底删除某个key
deleteKey(keyPath) {
let keys = keyPath.split('.')
keys = this.mapParentKeys(keys)
this.document.deleteIn(keys)
this.save()
}
// 保存yaml文件，写入文件
save() {
this.isSave = true
let yaml = this.document.toString()
fs.writeFileSync(this.yamlPath, yaml, 'utf8')
}
}
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