Zotero Script for looking up ISSN and other fields in Wikidata

zotero-wikidata-lookup-issn.js

// Zotero script look up the ISSN of the selected items in Wikidata.
// If results are found then the QIDs are saved in the corresponding
// items in the extra field with the label P1433 (published in).
// Moreover, it can do the same with ISBN or link to the publisher, place.
// Some warnings are given for the other cases; thus watch the
// Zotero error console as well during execution of the script. [CC0]


// CHOOSE (i.e. uncomment) one property here:
var property = "ISSN";
// var property = "publisher";
// var property = "place";
// var property = "ISBN";


mappingProperties = {
  // for journal article
  "ISSN": {
    "query": "P236",
    "exportProperty": "P1433"
  },
  // for books, chapters, etc.
  "publisher": {
    "query": "label",
    "exportProperty": "P123"
  },
  // for books chapters, etc.
  "place": {
    "query": "label",
    "exportProperty": "P291"
  },
  // for chapters etc. but not for books iteself
  "ISBN": {
    "query": "P212|wdt:957",
    "exportProperty": "P1433",
    "restrictItemTypes": ["bookSection", "conferencePaper", "dictionaryEntry", "encyclopediaArticle", "journalArticle", "magazineArticle", "newspaperArticle"]
  }
};


var items = Zotero.getActiveZoteroPane().getSelectedItems();


var map = [];
for (let item of items) {
  if ("restrictItemTypes" in mappingProperties[property]) {
    let itemType = Zotero.ItemTypes.getName(item.itemTypeID);
    if (!mappingProperties[property]["restrictItemTypes"].includes(itemType)) {
      continue;
    }
  }
  let valueString = item.getField(property);
  if (valueString) {
    if (property == "ISSN" || property == "ISBN") {
      for (let val of valueString.split(", ")) {
        if (!(val in map)) {
          map[val] = [];
        }
        map[val].push(item.id);
      }
    }
    else {
      if (!(valueString in map)) {
        map[valueString] = [];
      }
      map[valueString].push(item.id);
    }
  }
  else {
    Zotero.log("Skipped id " + item.id + " because no " + property);
  }
}
if (Object.keys(map).length == 0) {
  return "Exiting, because no (restricted) item has field " + property;
}

var queryUrl = "https://query.wikidata.org/sparql?query=";
if (mappingProperties[property]["query"] == "label") {
  var valuesString = '"' + Object.keys(map).join('"@en "') + '"@en';
  var query = encodeURIComponent('SELECT * WHERE { VALUES ?v { ' + valuesString + '} ?item rdfs:label ?v . }');
} else {
  var valuesString = '"' + Object.keys(map).join('" "') + '"';
  var query = encodeURIComponent('SELECT * WHERE { VALUES ?v { ' + valuesString + '} ?item wdt:' + mappingProperties[property]["query"] + ' ?v . }');
}
var suffix = "&format=json";
var url = queryUrl + query+ suffix;
Zotero.log("URL " + url);

await Zotero.HTTP.doGet(url, function (obj) {
  data = JSON.parse(obj.responseText);
  Zotero.log(obj.responseText);
  var results = data.results.bindings;
  for (let result of results) {
    let val = result.v.value;
    // val has to be unique within the results to be added
    if (results.filter(res => res.v.value == val).length > 1) {
      Zotero.log("Several entries found for " + val + " and therefore skipping.");
      continue;
    }
    let qid = result.item.value.replace("http://www.wikidata.org/entity/", "");
    for (id of map[val]) {
      let item = Zotero.Items.get(id);
      let extra = item.getField("extra") || "";
      let extraLines = extra.split("\n");
      let skip = false;
      for (line of extraLines) {
        if (line.startsWith(mappingProperties[property]["exportProperty"] + ":") && line.endsWith(qid)) {
          skip = true;
        }
      }
      if (!skip) {
        item.setField("extra", extra + "\n" + mappingProperties[property]["exportProperty"] + ": " + qid);
        item.saveTx();
      }
      else {
        Zotero.log("Skipped id " + id + " because " + mappingProperties[property]["exportProperty"] + " " + qid + " already there");
      }
    }
  }

  if (results.length == 0) {
    Zotero.log("Nothing found on Wikidata.");
  }

});


return map;