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Copy pathvariable.js
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67 lines (60 loc) · 1.6 KB
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/**
* @fileoverview
* Object representing a Scratch variable.
*/
const uid = require('../util/uid');
class Variable {
/**
* @param {string} id Id of the variable.
* @param {string} name Name of the variable.
* @param {string} type Type of the variable, one of '' or 'list'
* @param {boolean} isCloud Whether the variable is stored in the cloud.
* @constructor
*/
constructor (id, name, type, isCloud) {
this.id = id || uid();
this.name = name;
this.type = type;
this.isCloud = isCloud;
switch (this.type) {
case Variable.SCALAR_TYPE:
this.value = 0;
break;
case Variable.LIST_TYPE:
this.value = [];
break;
case Variable.BROADCAST_MESSAGE_TYPE:
this.value = this.name;
break;
default:
throw new Error(`Invalid variable type: ${this.type}`);
}
}
toXML () {
return `<variable type="${this.type}" id="${this.id}">${this.name}</variable>`;
}
/**
* Type representation for scalar variables.
* This is currently represented as ''
* for compatibility with blockly.
* @const {string}
*/
static get SCALAR_TYPE () {
return '';
}
/**
* Type representation for list variables.
* @const {string}
*/
static get LIST_TYPE () {
return 'list';
}
/**
* Type representation for list variables.
* @const {string}
*/
static get BROADCAST_MESSAGE_TYPE () {
return 'broadcast_msg';
}
}
module.exports = Variable;