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package eu.dnetlib.repo.manager.service.controllers;
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import org.apache.log4j.Logger;
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import org.json.JSONArray;
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import org.json.JSONException;
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import org.json.JSONObject;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.http.HttpHeaders;
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import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
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import org.springframework.stereotype.Component;
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import org.springframework.web.client.RestTemplate;
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import org.springframework.web.util.UriComponents;
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import org.springframework.web.util.UriComponentsBuilder;
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import javax.annotation.PostConstruct;
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import java.util.HashMap;
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import java.util.Map;
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@Component
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public class StatsApiImpl implements StatsApi {
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private RestTemplate restTemplate = null;
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private HttpHeaders httpHeaders;
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private static final Logger LOGGER = Logger.getLogger(RepositoryApiImpl.class);
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@Value("${search.api.baseAddress}")
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private String baseAddress;
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@Value("${search.api.usagestats}")
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private String usagestatsBaseAddress;
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@PostConstruct
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private void init() {
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LOGGER.debug("Initialization method of statistics api!");
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restTemplate = new RestTemplate();
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restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());
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httpHeaders = new HttpHeaders();
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httpHeaders.set("Content-Type", "application/json");
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}
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@Override
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public Map<String, Object> getStatistics() throws JSONException {
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String aggregators = getTotalByType("datasource",baseAddress+"/resources",
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"?query= " +
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" oaftype exact datasource and " +
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" ( datasourcetypename exact Institutional Repository Aggregator " +
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" or datasourcetypename exact Publication Repository Aggregator )");
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String dataRepositories = getTotalByType("datasource",baseAddress+"/resources",
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"?query= " +
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" oaftype exact datasource and " +
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" datasourcetypename exact Data Repository " );
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String literature = getTotalByType("datasource",baseAddress+"/resources",
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"?query= " +
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" oaftype exact datasource and " +
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" ( datasourcetypename exact Institutional Repository " +
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" or datasourcetypename exact Publication Repository )");
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String journal = getTotalByType("datasource",baseAddress+"/resources",
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"?query= " +
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" oaftype exact datasource and " +
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" datasourcetypename exact Journal");
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String publications = getTotalByType("other",baseAddress,"/publications/count");
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String datasets = getTotalByType("other",baseAddress,"/datasets/count");
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String software = getTotalByType("other",baseAddress,"/software/count");
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JSONObject usagestats = getUsageStatsTotal();
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HashMap<String,Object> stats = new HashMap<>();
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stats.put("aggregators",aggregators);
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stats.put("dataRepositories",dataRepositories);
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stats.put("literature",literature);
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stats.put("journal",journal);
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stats.put("publications",publications);
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stats.put("datasets",datasets);
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stats.put("software",software);
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stats.put("usagestats",usagestats.toString());
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return stats;
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}
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private String getTotalByType(String type,String url,String query) throws JSONException {
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UriComponents uriComponents = UriComponentsBuilder
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.fromHttpUrl(url + query)
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.queryParam("page",0)
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.queryParam("size",0)
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.queryParam("format","json")
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.build().encode();
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String rs = restTemplate.getForObject(uriComponents.toUri(), String.class);
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if(type.equalsIgnoreCase("datasource")){
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JSONObject metadata = (JSONObject) new JSONObject(rs).get("meta");
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return String.valueOf(metadata.get("total"));
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}else
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return String.valueOf(new JSONObject(rs).get("total"));
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}
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private JSONObject getUsageStatsTotal() throws JSONException {
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UriComponents uriComponents = UriComponentsBuilder
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.fromHttpUrl(usagestatsBaseAddress + "/totals")
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.build().encode();
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String rs = restTemplate.getForObject(uriComponents.toUri(), String.class);
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JSONArray resultSet = (JSONArray) new JSONObject(rs).getJSONArray("yearly_stats");
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JSONObject lastYear = resultSet.getJSONObject(resultSet.length()-1);
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Integer downloads = lastYear.getInt("downloads");
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Integer views = lastYear.getInt("views");
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String year = lastYear.getString("year");
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JSONObject usagestats = new JSONObject();
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usagestats.put("number",String.valueOf(downloads+views));
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usagestats.put("year",year);
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return usagestats;
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}
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}
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