@citation-js/core/lib/Cite/log.js

Convert different bibliographic metadata sources

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.currentVersion = currentVersion;
exports.retrieveLastVersion = retrieveLastVersion;
exports.retrieveVersion = retrieveVersion;
exports.save = save;
exports.undo = undo;
function currentVersion() {
  return this.log.length;
}
function retrieveVersion(versnum = 1) {
  if (versnum <= 0 || versnum > this.currentVersion()) {
    return null;
  } else {
    const [data, options] = this.log[versnum - 1];
    const image = new this.constructor(JSON.parse(data), JSON.parse(options));
    image.log = this.log.slice(0, versnum);
    return image;
  }
}
function undo(number = 1) {
  return this.retrieveVersion(this.currentVersion() - number);
}
function retrieveLastVersion() {
  return this.retrieveVersion(this.currentVersion());
}
function save() {
  this.log.push([JSON.stringify(this.data), JSON.stringify(this._options)]);
  return this;
}