130 lines
4.6 KiB
Java
130 lines
4.6 KiB
Java
package org.schabi.newpipe.extractor.services.peertube.extractors;
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import java.io.IOException;
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import org.jsoup.helper.StringUtil;
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import org.schabi.newpipe.extractor.InfoItem;
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import org.schabi.newpipe.extractor.InfoItemExtractor;
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import org.schabi.newpipe.extractor.InfoItemsCollector;
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import org.schabi.newpipe.extractor.StreamingService;
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import org.schabi.newpipe.extractor.downloader.Downloader;
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import org.schabi.newpipe.extractor.downloader.Response;
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import org.schabi.newpipe.extractor.exceptions.ExtractionException;
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import org.schabi.newpipe.extractor.exceptions.ParsingException;
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import org.schabi.newpipe.extractor.linkhandler.SearchQueryHandler;
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import org.schabi.newpipe.extractor.search.InfoItemsSearchCollector;
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import org.schabi.newpipe.extractor.search.SearchExtractor;
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import org.schabi.newpipe.extractor.utils.JsonUtils;
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import org.schabi.newpipe.extractor.utils.Parser;
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import org.schabi.newpipe.extractor.utils.Parser.RegexException;
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import com.grack.nanojson.JsonArray;
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import com.grack.nanojson.JsonObject;
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import com.grack.nanojson.JsonParser;
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public class PeertubeSearchExtractor extends SearchExtractor {
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private static final String START_KEY = "start";
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private static final String COUNT_KEY = "count";
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private static final int ITEMS_PER_PAGE = 12;
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private static final String START_PATTERN = "start=(\\d*)";
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private InfoItemsPage<InfoItem> initPage;
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private long total;
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public PeertubeSearchExtractor(StreamingService service, SearchQueryHandler linkHandler) {
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super(service, linkHandler);
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}
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@Override
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public String getSearchSuggestion() throws ParsingException {
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return null;
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}
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@Override
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public InfoItemsPage<InfoItem> getInitialPage() throws IOException, ExtractionException {
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super.fetchPage();
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return initPage;
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}
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private InfoItemsCollector<InfoItem, InfoItemExtractor> collectStreamsFrom(JsonObject json) throws ParsingException {
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final InfoItemsSearchCollector collector = getInfoItemSearchCollector();
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JsonArray contents;
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try {
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contents = (JsonArray) JsonUtils.getValue(json, "data");
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}catch(Exception e) {
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throw new ParsingException("unable to extract search info", e);
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}
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for(Object c: contents) {
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if(c instanceof JsonObject) {
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final JsonObject item = (JsonObject) c;
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PeertubeStreamInfoItemExtractor extractor = new PeertubeStreamInfoItemExtractor(item);
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collector.commit(extractor);
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}
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}
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return collector;
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}
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@Override
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public String getNextPageUrl() throws IOException, ExtractionException {
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super.fetchPage();
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return initPage.getNextPageUrl();
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}
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@Override
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public InfoItemsPage<InfoItem> getPage(String pageUrl) throws IOException, ExtractionException {
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Response response = getDownloader().get(pageUrl);
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JsonObject json = null;
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if(null != response && !StringUtil.isBlank(response.responseBody())) {
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try {
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json = JsonParser.object().from(response.responseBody());
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} catch (Exception e) {
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throw new ParsingException("Could not parse json data for search info", e);
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}
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}
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if(json != null) {
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Number number = JsonUtils.getNumber(json, "total");
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if(number != null) this.total = number.longValue();
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return new InfoItemsPage<>(collectStreamsFrom(json), getNextPageUrl(pageUrl));
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} else {
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throw new ExtractionException("Unable to get peertube search info");
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}
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}
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@Override
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public void onFetchPage(Downloader downloader) throws IOException, ExtractionException {
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String pageUrl = getUrl() + "&" + START_KEY + "=0&" + COUNT_KEY + "=" + ITEMS_PER_PAGE;
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this.initPage = getPage(pageUrl);
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}
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private String getNextPageUrl(String prevPageUrl) {
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String prevStart;
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try {
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prevStart = Parser.matchGroup1(START_PATTERN, prevPageUrl);
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} catch (RegexException e) {
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return "";
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}
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if(StringUtil.isBlank(prevStart)) return "";
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long nextStart = 0;
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try {
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nextStart = Long.valueOf(prevStart) + ITEMS_PER_PAGE;
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} catch (NumberFormatException e) {
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return "";
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}
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if(nextStart >= total) {
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return "";
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}else {
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return prevPageUrl.replace(START_KEY + "=" + prevStart, START_KEY + "=" + String.valueOf(nextStart));
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}
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}
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}
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