template/components/generate-crossref.js

//import xml from "xml";

export default function(data) {

  if (data.published == undefined) {
    //console.warn("Can't generate XML for post ", data.title, "with data", data);
    //return "";
    data.published = new Date("invalid");
  }

  var date = data.published;
  var batch_timestamp = Math.floor(Date.now() / 1000);
  var batch_id = data.authors.length ? data.authors[0].lastName.toLowerCase().slice(0,20) : "Anonymous";
      batch_id += "_" + date.getFullYear();
      batch_id += "_" + data.title.split(" ")[0].toLowerCase().slice(0,20) + "_" +  batch_timestamp;
  // generate XML
  var crf_data =
    {doi_batch : [

      { _attr: {
        version: "4.3.7",
        xmlns: "http://www.crossref.org/schema/4.3.7",
        "xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance",
        "xsi:schemaLocation": "http://www.crossref.org/schema/4.3.7 http://www.crossref.org/schemas/crossref4.3.7.xsd",
      }},

      { head: [
        {doi_batch_id: batch_id},
        {timestamp: batch_timestamp},
        {depositor: [
          {depositor_name: data.journal.depositorName},
          {email_address: data.journal.email},
        ]},
        {registrant: "Distill"},
      ]},

      {body: [
        {journal: [

          {journal_metadata: [
            {full_title: data.journal.full_title || data.journal.title},
            {abbrev_title: data.journal.abbrev_title || data.journal.title || data.journal.full_title},
            {doi_data: [
              {doi: data.journal.doi},
              {resource: data.journal.url},
            ]},
          ]},

          {journal_issue: [
            {publication_date: [
              {month: date.getMonth()+1},
              {year: date.getFullYear()},
            ]},
            {journal_volume: [
              {volume: data.volume},
            ]},
            {issue: data.issue},
          ]},

          {journal_article: [
            {titles: [
              {title: data.title},
            ]},
            { contributors:
              data.authors.map((author, ind) => (
                {person_name: [
                  { _attr: {
                    contributor_role: "author",
                    sequence: (ind == 0)? "first" : "additional"
                  }},
                  {given_name: author.firstName},
                  {surname: author.lastName},
                  {affiliation: author.affiliation}
                  // TODO: ORCID?
                ]}
              ))
            },
            {publication_date: [
                {month: date.getMonth()+1},
                {day: date.getDate()},
                {year: date.getFullYear()}
            ]},
            { publisher_item: [
              {item_number: data.doi}
            ]},
            {doi_data: [
              {doi: data.doi},
              //{timestamp: ""},
              {resource: data.url},
            ]},
            {citation_list:
              data.citations.map(key =>
                  citation_xml(key, data.bibliography[key]))
            }

          ]},

        ]},
      ]},
    ]};

  return xml(crf_data);
}

function citation_xml(key, ent){
  if (ent == undefined) return {};
  var info = [];
  info.push({_attr: {key: key}});
  if ("title" in ent)
    info.push({article_title: ent.title});
  if ("author" in ent)
    info.push({author: ent.author.split(" and ")[0].split(",")[0].trim()});
  if ("journal" in ent)
    info.push({journal_title: ent.journal});
  if ("booktitle" in ent)
    info.push({volume_title: ent.booktitle});
  if ("volume" in ent)
    info.push({volume: ent.volume});
  if ("issue" in ent)
    info.push({issue: ent.issue});
  if ("doi" in ent)
    info.push({doi: ent.doi});
  return {citation: info}
}

function xml(obj) {
  //console.log(typeof(obj), obj)
  if (typeof obj === 'string') return obj;
  if (typeof obj === 'number') return ""+obj;
  let keys = Object.keys(obj);
  if (keys.length != 1) console.error("can't interpret ", obj, "as xml");
  let name = keys[0];
  var full_content = obj[name];
  var attr = {};
  if (Array.isArray(full_content)){
    var content = [];
    for (var i in  full_content) {
      var obj = full_content[i];
      var obj_name = Object.keys(obj)[0];
      if ("_attr" == obj_name) {
        attr = obj["_attr"];
      } else {
        //console.log(Object.keys(obj)[0])
        content.push(obj);
      }
    }
  } else {
    content = full_content;
  }
  if (content == undefined){
    content = "undefined"
  }

  let attr_string = "";
  for (var k in attr) {
    attr_string += ` ${k}=\"${attr[k]}\"`
  }

  //console.log(typeof content, Array.isArray(content), content instanceof String, content)
  if (Array.isArray(content)){
    content = content.map(xml);
    content = content.join("\n").split("\n");
    content = content.map(s => "  " + s).join("\n")
    var result = `<${name}${attr_string}>\n${content}\n</${name}>`;
  } else {
    content = xml(content);
    var result = `<${name}${attr_string}>${content}</${name}>`;
  }
  return result;
}