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import { Item } from 'ancient-funicular';
import createDebug from 'debug';
import Docker from 'dockerode';
import { statSync } from 'fs';
/**
* @class Container
*/
export default class Container extends Item {
/**
* @constructs Container
* @param {Object=} [options] - Service connection settings
*/
constructor(options) {
super();
/**
* @protected
* @type {Object}
* @description Docker class service management.
* https://github.com/apocas/dockerode
*/
this._docker = null;
if (this._isObject(options)) {
this._docker = new Docker(options);
}
else {
var socket = process.env.DOCKER_SOCKET || '/var/run/docker.sock';
var stats = statSync(socket);
if (!stats.isSocket()) {
throw new Error('Local service is not found.');
}
this._docker = new Docker({
socketPath: socket
});
}
}
/**
* @protected
* @param {Object|String} options - Container parameters
* @description Creates and registers a container in the system.
*/
create(options) {
var self = this;
if (!self._isString(options) && !self._isObject(options)) {
throw new Error('The variable \'options\' is not correct.');
}
if (self._isString(options)) {
var Image = options;
options = { Image };
}
self._pullImage(options.Image, (error) => {
self._handlerError(error);
self._createContainer(options);
});
}
/**
* @protected
* @description Stops and destroys the container.
*/
destroy() {}
/**
* @protected
* @param {String} image - Name of the image
* @param {Function} callback - Called function
* @description Pulls out the image of the container.
*/
_pullImage(image, callback) {
var self = this;
self._docker.pull(image).then(stream => {
self._docker.modem.followProgress(stream, callback, self.debug);
}).catch(error => self._handlerError(error));
}
/**
* @protected
* @param {Object} options - Container settings
* @description Creating a container and registering management.
*/
_createContainer(options) {
var self = this;
self._docker.createContainer(options).then(container => {
/* @todo Class registration */
self.debug(container);
}).catch(error => self._handlerError(error));
}
/**
* @protected
* @param {*} value - The variable to check
* @returns {Boolean} Result of checking
* @description Checks the type of the variable.
*/
_isString(value) {
return typeof value === 'string';
}
/**
* @protected
* @param {*} value - The variable to check
* @returns {Boolean} Result of checking
* @description Checks the type of the variable.
*/
_isObject(value) {
return typeof value === 'object';
}
/**
* @protected
* @param {*} error - A string with an error
* @description Handles the error if present.
*/
_handlerError(error) {
if (error) {
throw new Error(error);
}
}
/**
* @param {*} Any variables
* @description A simple debugger.
*/
debug() {
var args = Array.prototype.slice.call(arguments);
var debug = createDebug('container');
debug.apply(null, args);
}
}
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