Revision 792fbe18
Added by koszko about 2 years ago
content/repo_query.js | ||
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/* |
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* IMPORTS_START |
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* IMPORT make_ajax_request |
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* IMPORT observables |
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* IMPORT TYPE_PREFIX |
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* IMPORT parse_json_with_schema |
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* IMPORT matchers |
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* IMPORTS_END |
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*/ |
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var query_started = false; |
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const paths = { |
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[TYPE_PREFIX.PAGE]: "/pattern", |
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[TYPE_PREFIX.BAG]: "/bag", |
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[TYPE_PREFIX.SCRIPT]: "/script", |
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[TYPE_PREFIX.URL]: "/query" |
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}; |
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var url = undefined; |
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var repos = undefined; |
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var callback = undefined; |
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const queried_items = new Map(); |
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const observable = observables.make(); |
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async function query(repo)
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function repo_query(prefix, item, repo_urls)
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{ |
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const [repo_url, data] = repo;
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const key = prefix + item;
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let response = "Query failed";
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const query_url = `${repo_url}/query?n=${encodeURIComponent(url)}`;
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const results = queried_items.get(key) || {};
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queried_items.set(key, results);
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try { |
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let xhttp = await make_ajax_request("GET", query_url); |
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if (xhttp.status === 200) |
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response = xhttp.responseText; |
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console.log(xhttp); |
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} catch (e) { |
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console.log(e); |
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} |
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for (const repo_url of repo_urls) |
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perform_query_against(key, repo_url, results); |
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} |
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callback([repo_url, response]); |
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const page_schema = { |
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pattern: matchers.nonempty_string, |
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payload: ["optional", matchers.component, "default", undefined] |
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}; |
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const bag_schema = { |
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name: matchers.nonempty_string, |
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components: ["optional", [matchers.component, "repeat"], "default", []] |
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}; |
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const script_schema = { |
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name: matchers.nonempty_string, |
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location: matchers.nonempty_string, |
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sha256: matchers.sha256, |
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}; |
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const search_result_schema = [page_schema, "repeat"]; |
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const schemas = { |
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[TYPE_PREFIX.PAGE]: page_schema, |
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[TYPE_PREFIX.BAG]: bag_schema, |
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[TYPE_PREFIX.SCRIPT]: script_schema, |
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[TYPE_PREFIX.URL]: search_result_schema |
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} |
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function start_query()
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async function perform_query_against(key, repo_url, results)
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{ |
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if (query_started || !url || !repos || !callback)
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if (results[repo_url] !== undefined)
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return; |
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query_started = true; |
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const prefix = key[0]; |
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const item = key.substring(1); |
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const result = {state: "started"}; |
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results[repo_url] = result; |
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console.log(`about to query ${url} from ${repos}`); |
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const broadcast_msg = {prefix, item, results: {[repo_url]: result}}; |
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observables.broadcast(observable, broadcast_msg); |
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for (const repo of repos)
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query(repo);
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}
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let state = "connection_error";
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const query_url =
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`${repo_url}${paths[prefix]}?n=${encodeURIComponent(item)}`;
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function set_repo_query_url(_url) |
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{ |
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url = _url; |
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try { |
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let xhttp = await make_ajax_request("GET", query_url); |
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if (xhttp.status === 200) { |
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state = "parse_error"; |
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result.response = |
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parse_json_with_schema(schemas[prefix], xhttp.responseText); |
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state = "completed"; |
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} |
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} catch (e) { |
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console.log(e); |
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} |
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start_query(); |
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result.state = state; |
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observables.broadcast(observable, broadcast_msg); |
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} |
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function set_repo_query_repos(_repos)
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function subscribe_repo_query_results(cb)
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{ |
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repos = _repos;
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start_query();
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observables.subscribe(observable, cb);
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for (const [key, results] of queried_items.entries()) |
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cb({prefix: key[0], item: key.substring(1), results});
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} |
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function set_repo_query_callback(_callback)
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function unsubscribe_repo_query_results(cb)
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{ |
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callback = _callback; |
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start_query(); |
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observables.unsubscribe(observable, cb); |
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} |
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/* |
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* EXPORTS_START |
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* EXPORT set_repo_query_url
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* EXPORT set_repo_query_repos
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* EXPORT set_repo_query_callback
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* EXPORT repo_query
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* EXPORT subscribe_repo_query_results
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* EXPORT unsubscribe_repo_query_results
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* EXPORTS_END |
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*/ |
Also available in: Unified diff
Facilitate installation of scripts from the repository
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