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index.js
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index.js
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// we don`t want to use node core modules to be able to use in electron/react/browser
const request=require('superagent')
const EventEmitter=require("event-emitter")
const base64=require("base-64")
/**
* OrientDB Connection
*
* @constructor
* @parent EventEmitter
*/
const defaultConfig={
user: 'root',
password: 'root_passwd',
host: 'http://127.0.0.1:2480',
database: 'GratefulDeadConcerts',
language: 'sql',
timeout: 1000*5,
}
class Connection {
constructor(config) {
this.user=config.user || defaultConfig.user
this.password=config.password || defaultConfig.password
this.host=config.host || defaultConfig.host
this.database=config.database || defaultConfig.database
this._language=config.language || defaultConfig.language
this._timeout=config.timeout || defaultConfig.timeout
this._authHeader='Basic '+base64.encode(this.user+':'+this.password)
const methods = ['post', 'get', 'put', 'delete', 'head', 'patch']
methods.forEach((method)=>{
this[method] = (command, args, body)=>{
return this.request(method.toLowerCase(), command, args, body)
}
})
}
connect(){
return this.get('connect').then((response)=>{
this.emit('connected', response)
return response
}).catch((err)=>{
this._onError(err)
return err
})
}
disconnect(){
return request.get(this.host+'/disconnect')
.set('Authorization',this._authHeader)
.send()
.then(response=>{})
.catch(err=>{
if(
err.response.status===401 && err.response.body && err.response.body.errors &&
Array.isArray(err.response.body.errors) && err.response.body.errors.length
){
let response=err.response.body.errors[0]
this.emit('disconnected', response)
return true
} else
this._onError(err)
})
}
request(method, command, args, data) {
if(args && typeof args==='string')
args=args ? args.replace('#','') : ''
const url = this.host+'/'+command+'/'+this.database+'/'+args
const requestInstance=request[method](url)
.timeout(this._timeout)
.set('Authorization', this._authHeader)
.set('Accept', 'application/json')
.set('Accept-Encoding','gzip, deflate')
if(['post','put','patch'].indexOf(method.toLowerCase())>-1)
requestInstance.set('Content-Length', data ? JSON.stringify(data).length : null)
return requestInstance.send(data)
.then((response)=>{
if(response.statusCode===204)
return true
return response.body
}).catch(err=>{
this._onError(err)
throw err
})
}
command(command, parameters, limit, fetchplan) {
const postData={
command: command,
parameters: parameters || []
}
const args=this._makeArgsUrl('', limit, fetchplan)
return this.post('command', args, postData)
}
query(query, parameters, limit, fetchplan) {
const language = this._language
if(!parameters){
const args=this._makeArgsUrl(query, limit, fetchplan)
return this.get('query', args)
}
return this.command(query, parameters, limit, fetchplan)
}
queryOne(query, parameters, fetchplan){
return this.command(query, parameters, 1, fetchplan)
.then((response)=>{
if(response.result && response.result.length)
return response.result[0]
return null
})
}
insert(className, data){
data['@class']=className
return this.post('document', null, data)
}
_makeArgsUrl(command, limit, fetchplan){
limit=limit ? `/${limit}` : ''
fetchplan=fetchplan ? `/${fetchplan}` : ''
command=command ? encodeURIComponent(command) : ''
return `${this._language}/${command}${limit}${fetchplan}`
}
_onError(err){
if(!err)
this.emit('error')
else if(err.response && err.response.body)
this.emit('error', err.response.statusCode+': '+err.message, err.response.body)
else if(err.response && err.response.text)
this.emit('error', err.response.statusCode+': '+err.message, err.response.text)
else
this.emit('error',err)
}
language(language) {
this._language = language;
return this
}
getDateTimeFormatted(from){
let d=new Date()
if(from)
d=new Date(from)
return [d.getFullYear(),d.getMonth()+1,d.getDate()].join('-')+' '+
[d.getHours(),d.getMinutes(),d.getSeconds()].join(':')
}
getDateFormatted(from){
let d=new Date()
if(from)
d=new Date(from)
return [d.getFullYear(),d.getMonth()+1,d.getDate()].join('-')
}
}
EventEmitter(Connection.prototype)
// Expose the class either via AMD, CommonJS or the global object
if (typeof define === 'function' && define.amd) {
define(()=>{ return Connection })
} else if (typeof module === 'object' && module.exports){
module.exports = Connection
module.exports.default = Connection
} else {
exports.Connection = Connection
exports.default = Connection
}