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December 16, 2021 10:52
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Zotero Script for Wikidata Lookup
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| // Zotero script look up selected items in Wikidata and | |
| // check whether the DOI can be found there. If results | |
| // are found then the QIDs are saved in the corresponding | |
| // items in the extra field. Some warnings are given for the | |
| // other cases; thus you may want to watch the Zotero error | |
| // console as well during execution of the script. [CC0] | |
| var items = Zotero.getActiveZoteroPane().getSelectedItems(); | |
| var map = []; | |
| for (let item of items) { | |
| if (item.getField("DOI")) { | |
| map[item.getField("DOI")] = { id: item.id }; | |
| map[item.getField("DOI").toUpperCase()] = { id: item.id }; | |
| } | |
| else { | |
| item.addTag("no-doi"); | |
| // look for items with the tag "no-doi" and possibly assign some color to the tag | |
| item.saveTx(); | |
| Zotero.log("Skipped id " + item.id + " because no DOI"); | |
| } | |
| } | |
| var doiString = '"' + Object.keys(map).join('" "') + '"'; | |
| var queryUrl = "https://query.wikidata.org/sparql?query="; | |
| var query = encodeURIComponent('SELECT * WHERE { VALUES ?doi { ' + doiString + '} ?item wdt:P356 ?doi . }'); | |
| 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 doi = result.doi.value; | |
| let qid = result.item.value.replace("http://www.wikidata.org/entity/", ""); | |
| map[doi].qid = qid; | |
| let item = Zotero.Items.get(map[doi].id); | |
| let extra = item.getField("extra") || ""; | |
| let extraLines = extra.split("\n"); | |
| let skip = false; | |
| for (line of extraLines) { | |
| if (line.startsWith("QID:") && line.endsWith(qid)) { | |
| skip = true; | |
| } | |
| } | |
| if (!skip) { | |
| item.setField("extra", extra + "\nQID: " + qid); | |
| item.saveTx(); | |
| } | |
| else { | |
| Zotero.log("Skipped id " + map[doi].id + " because QID " + qid + " already there"); | |
| } | |
| } | |
| if (results.length == 0) { | |
| Zotero.log("Nothing found on Wikidata."); | |
| } | |
| }); | |
| return map; |
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