123 lines
4.5 KiB
Java
123 lines
4.5 KiB
Java
package org.schabi.newpipe.extractor.services.peertube.extractors;
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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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import org.jsoup.helper.StringUtil;
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import org.schabi.newpipe.extractor.StreamingService;
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import org.schabi.newpipe.extractor.comments.CommentsExtractor;
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import org.schabi.newpipe.extractor.comments.CommentsInfoItem;
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import org.schabi.newpipe.extractor.comments.CommentsInfoItemsCollector;
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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.ListLinkHandler;
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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 java.io.IOException;
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public class PeertubeCommentsExtractor extends CommentsExtractor {
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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<CommentsInfoItem> initPage;
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private long total;
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public PeertubeCommentsExtractor(StreamingService service, ListLinkHandler uiHandler) {
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super(service, uiHandler);
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}
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@Override
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public String getName() throws ParsingException {
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return "Comments";
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}
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@Override
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public InfoItemsPage<CommentsInfoItem> 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 void collectStreamsFrom(CommentsInfoItemsCollector collector, JsonObject json, String pageUrl) throws ParsingException {
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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 comments 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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PeertubeCommentsInfoItemExtractor extractor = new PeertubeCommentsInfoItemExtractor(item, this);
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collector.commit(extractor);
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}
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}
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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<CommentsInfoItem> 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 comments info", e);
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}
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}
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CommentsInfoItemsCollector collector = new CommentsInfoItemsCollector(getServiceId());
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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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collectStreamsFrom(collector, json, pageUrl);
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} else {
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throw new ExtractionException("Unable to get peertube comments info");
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}
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return new InfoItemsPage<>(collector, getNextPageUrl(pageUrl));
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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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