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queryColophons.js
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queryColophons.js
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/* jshint esversion: 6 */
/**
* Gets from GitHub complete list of available colophons
* @param {Function} loading Function to run while loading data
* @return {Array} Array of folophons and their texts
*/
/* jshint ignore:start */
async function getAllColophons(loading){
loading();
const index = 'https://api.github.com/repos/paths-erc/coptic-texts/contents/colophons';
const response = await fetch(index);
const json = await response.json();
return Promise.all(json.map(col =>
fetch(col.download_url)
.then(resp => resp.text() )
.then(r => {
return {
"file": col.name.replace('.xml', ''),
"text": r
};
})
));
}
/* jshint ignore:end */
/**
* Runs an xpath query on the dataset and paginates results
* @param {Array} data dataset to be queried
* @param {String} xpath Xpath query
*/
function RunQuery(data, xpath){
html = '<ol>';
data.map(i => {
var arr = runXPath(i.text, xpath);
var html_part = arr.map(e => {
let data = [];
Object.entries(e).forEach(
([key, value]) => {
if(key != 'val'){
data.push(`<span class="text-secondary">${key}:</span> <span class="text-info">${value}</span>`);
}
});
data = data.join("<br>");
return `<li>
<div class="row">
<div class="col coptic">${e.val}</div>
<div class="col">${data}</div>
<div class="col text-secondary"><a href="https://github.com/paths-erc/coptic-texts/blob/master/colophons/${i.file}.xml" target="_blank">${i.file}</a></div>
</div>
</li>`;
});
html += html_part.join('');
});
html += '</ol>';
return html;
}
/**
* Runs an xpath query on the dataset and returns list of nodes
* @param {Array} data dataset to be queried
* @param {String} xpath Xpath query
*/
function runXPath(data, xpath){
var doc = (new DOMParser()).parseFromString(data, 'text/xml');
var nodes = doc.evaluate(xpath, doc, function(prefix) { return "http://www.tei-c.org/ns/1.0"; } , XPathResult.ANY_TYPE, null);
var result = nodes.iterateNext();
var txt = [];
while (result) {
let obj = {};
if (typeof result.childNodes[0] !== 'undefined'){
for(var i = result.attributes.length - 1; i >= 0; i--) {
obj[result.attributes[i].name] = result.attributes[i].value;
}
obj.val = result.childNodes[0].nodeValue;
txt.push(obj);
}
result = nodes.iterateNext();
}
return txt;
}