[pixeldrain] warn about hotlink-protected files (#8803)

https://github.com/mikf/gallery-dl/issues/8803#issuecomment-3733498009

gallery_dl/extractor/pixeldrain.py

@@ -24,6 +24,16 @@ class PixeldrainExtractor(Extractor):
         if api_key := self.config("api-key"):
             self.session.auth = util.HTTPBasicAuth("", api_key)
 
+    def _available(self, file):
+        if not file.get("availability"):
+            return True
+
+        self.status |= 1
+        self.log.debug(file["availability"])
+        self.log.warning(
+            "%s: '%s'", file["name"], file["availability_message"])
+        return False
+
 
 class PixeldrainFileExtractor(PixeldrainExtractor):
     """Extractor for pixeldrain files"""
@@ -45,7 +55,12 @@ class PixeldrainFileExtractor(PixeldrainExtractor):
 
         text.nameext_from_name(file["name"], file)
         yield Message.Directory, "", file
-        yield Message.Url, file["url"], file
+        if file.get("availability"):
+            self.status |= 1
+            self.log.debug(file["availability"])
+            self.log.error("'%s'", file["availability_message"])
+        else:
+            yield Message.Url, file["url"], file
 
 
 class PixeldrainAlbumExtractor(PixeldrainExtractor):
@@ -103,6 +118,8 @@ class PixeldrainAlbumExtractor(PixeldrainExtractor):
 
         yield Message.Directory, "", {"album": album}
         for num, file in enumerate(files, idx+1):
+            if not self._available(file):
+                continue
             file["album"] = album
             file["num"] = num
             file["url"] = url = f"{self.root}/api/file/{file['id']}?download"
@@ -156,6 +173,8 @@ class PixeldrainFolderExtractor(PixeldrainExtractor):
         for child in children:
             if child["type"] == "file":
                 num += 1
+                if not self._available(child):
+                    continue
                 url = f"{self.root}/api/filesystem{child['path']}?attach"
                 share_url = f"{self.root}/d{child['path']}"
                 data = self.metadata(child)