[YouTube] Refactor the code to get stream items' view count

This refactoring avoids code duplication as much as possible.

Author: AudricV

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeStreamInfoItemExtractor.java

@@ -13,6 +13,7 @@
 import org.schabi.newpipe.extractor.utils.Parser;
 import org.schabi.newpipe.extractor.utils.Utils;
 
+import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import java.time.Instant;
 import java.time.OffsetDateTime;
@@ -290,85 +291,86 @@ public long getViewCount() throws ParsingException {
             return -1;
         }
 
-        final String viewCount = getTextFromObject(videoInfo.getObject("viewCountText"));
+        // Ignore all exceptions, as the view count can be hidden by creators, and so cannot be
+        // found in this case
 
-        if (!isNullOrEmpty(viewCount)) {
+        final String viewCountText = getTextFromObject(videoInfo.getObject("viewCountText"));
+        if (!isNullOrEmpty(viewCountText)) {
             try {
-                // These approaches are language dependent
-                if (viewCount.toLowerCase().contains(NO_VIEWS_LOWERCASE)) {
-                    return 0;
-                } else if (viewCount.toLowerCase().contains("recommended")) {
-                    return -1;
-                }
-
-                return Long.parseLong(Utils.removeNonDigitCharacters(viewCount));
+                return getViewCountFromViewCountText(viewCountText, false);
             } catch (final Exception ignored) {
-                // Ignore all exceptions, as we can fall back to accessibility data
             }
         }
 
         // Try parsing the real view count from accessibility data, if that's not a running
         // livestream (the view count is returned and not the count of people watching currently
         // the livestream)
         if (getStreamType() != StreamType.LIVE_STREAM) {
-            final String videoInfoTitleAccessibilityData = videoInfo.getObject("title")
-                    .getObject("accessibility")
-                    .getObject("accessibilityData")
-                    .getString("label", "");
-
-            if (videoInfoTitleAccessibilityData.toLowerCase().endsWith(NO_VIEWS_LOWERCASE)) {
-                return 0;
-            }
-
             try {
-                return Long.parseLong(Utils.removeNonDigitCharacters(
-                        // This approach is language dependent
-                        Parser.matchGroup1(ACCESSIBILITY_DATA_VIEW_COUNT_REGEX,
-                                videoInfoTitleAccessibilityData)));
+                return getViewCountFromAccessibilityData();
             } catch (final Exception ignored) {
-                // Ignore all exceptions, as the view count can be hidden by creators, and so
-                // cannot be found in this case
             }
         }
 
         // Fallback to a short view count, always used for livestreams (see why above)
-        try {
+        if (videoInfo.has("videoInfo")) {
             // Returned in playlists, in the form: view count separator upload date
-            if (videoInfo.has("videoInfo")) {
-                final String videoInfoViewCountText = videoInfo.getObject("videoInfo")
+            try {
+                return getViewCountFromViewCountText(videoInfo.getObject("videoInfo")
                         .getArray("runs")
                         .getObject(0)
-                        .getString("text", "");
-                if (videoInfoViewCountText.toLowerCase().contains(NO_VIEWS_LOWERCASE)) {
-                    return 0;
-                }
-
-                return Utils.mixedNumberWordToLong(videoInfoViewCountText);
+                        .getString("text", ""), true);
+            } catch (final Exception ignored) {
             }
+        }
 
+        if (videoInfo.has("shortViewCountText")) {
             // Returned everywhere but in playlists, used by the website to show view counts
-            if (videoInfo.has("shortViewCountText")) {
-                final String shortVideoViewCountText =
+            try {
+                final String shortViewCountText =
                         getTextFromObject(videoInfo.getObject("shortViewCountText"));
-                if (isNullOrEmpty(shortVideoViewCountText)) {
-                    return -1;
+                if (!isNullOrEmpty(shortViewCountText)) {
+                    return getViewCountFromViewCountText(shortViewCountText, true);
                 }
-
-                if (shortVideoViewCountText.toLowerCase().contains(NO_VIEWS_LOWERCASE)) {
-                    return 0;
-                }
-
-                return Utils.mixedNumberWordToLong(shortVideoViewCountText);
+            } catch (final Exception ignored) {
             }
-        } catch (final Exception ignored) {
-            // Ignore all exceptions, as the view count can be hidden by creators, and so cannot be
-            // found in this case
         }
 
         // No view count extracted: return -1, as the view count can be hidden by creators on videos
         return -1;
     }
 
+    private long getViewCountFromViewCountText(@Nonnull final String viewCountText,
+                                               final boolean isMixedNumber)
+            throws NumberFormatException, ParsingException {
+        // These approaches are language dependent
+        if (viewCountText.toLowerCase().contains(NO_VIEWS_LOWERCASE)) {
+            return 0;
+        } else if (viewCountText.toLowerCase().contains("recommended")) {
+            return -1;
+        }
+
+        return isMixedNumber ? Utils.mixedNumberWordToLong(viewCountText)
+                : Long.parseLong(Utils.removeNonDigitCharacters(viewCountText));
+    }
+
+    private long getViewCountFromAccessibilityData()
+            throws NumberFormatException, Parser.RegexException {
+        // These approaches are language dependent
+        final String videoInfoTitleAccessibilityData = videoInfo.getObject("title")
+                .getObject("accessibility")
+                .getObject("accessibilityData")
+                .getString("label", "");
+
+        if (videoInfoTitleAccessibilityData.toLowerCase().endsWith(NO_VIEWS_LOWERCASE)) {
+            return 0;
+        }
+
+        return Long.parseLong(Utils.removeNonDigitCharacters(
+                Parser.matchGroup1(ACCESSIBILITY_DATA_VIEW_COUNT_REGEX,
+                        videoInfoTitleAccessibilityData)));
+    }
+
     @Override
     public String getThumbnailUrl() throws ParsingException {
         return getThumbnailUrlFromInfoItem(videoInfo);