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getAvailable.js
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getAvailable.js
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const utils = require("./utils");
const queryString = require("query-string");
const {splitPrefixIntoParts, joinPartsIntoPrefix, unauthorized} = require("./getDatasetHelpers");
const {ResourceNotFoundError} = require("./exceptions");
/* handler for /charon/getAvailable requests */
const getAvailable = async (req, res) => {
const prefix = queryString.parse(req.url.split('?')[1]).prefix || "";
utils.verbose(`getAvailable prefix: "${prefix}"`);
const {source} = splitPrefixIntoParts(prefix);
// Authorization
if (!source.visibleToUser(req.user)) {
return unauthorized(req, res);
}
let datasets;
let narratives;
try {
datasets = await source.availableDatasets() || [];
narratives = await source.availableNarratives() || [];
} catch (err) {
if (err instanceof ResourceNotFoundError) {
return res.status(404).send("The requested URL does not exist.");
}
}
if (!datasets || !datasets.length) {
utils.verbose(`No datasets available for ${source.name}`);
}
if (!narratives || !narratives.length) {
utils.verbose(`No narratives available for ${source.name}`);
}
return res.json({
datasets: datasets.map((path) => ({
request: joinPartsIntoPrefix({source, prefixParts: [path]}),
secondTreeOptions: source.secondTreeOptions(path),
buildUrl: source.name === "community"
? `https://github.com/${source.repo}`
: null
})),
narratives: narratives.map((path) => ({
request: joinPartsIntoPrefix({source, prefixParts: [path], isNarrative: true})
}))
});
};
module.exports = {
default: getAvailable
};