reduced slack functionality, higher ease of use. Database migration wip

news_fetch/utils_worker/compress/runner.py

@@ -0,0 +1,47 @@
+import os
+import subprocess
+from pathlib import Path
+
+import logging
+logger = logging.getLogger(__name__)
+import configuration
+config = configuration.main_config["DOWNLOADS"]
+
+shrink_sizes = []
+
+def shrink_pdf(article):
+    article_loc = Path(article.save_path) / article.file_name
+    initial_size = article_loc.stat().st_size
+    compressed_tmp = Path(config['default_download_path']) / "compressed.pdf"
+
+    if article_loc.suffix != "pdf":
+        return article # it probably was a youtube video
+        
+    c = subprocess.run(
+        [
+            "gs",
+            "-sDEVICE=pdfwrite",
+            "-dPDFSETTINGS=/screen",
+            "-dNOPAUSE",
+            "-dBATCH",
+            f"-sOutputFile={compressed_tmp}", 
+            f"{article_loc}"
+        ],
+        stdout=subprocess.PIPE, stderr=subprocess.PIPE
+    )
+
+    if c.returncode == 0:
+        try:
+            os.replace(compressed_tmp, article_loc)
+        except OSError as e:
+            logger.error(f"Compression ran but I could not copy back the file {e}")
+
+        final_size = article_loc.stat().st_size
+        shrink_sizes.append(initial_size - final_size)
+        logger.info(f"Compression worked. Avg shrinkage: {int(sum(shrink_sizes)/len(shrink_sizes) / 1000)} KB")
+
+
+    else:
+        logger.error(f"Could not run the compression! {c.stderr.decode()} - {c.stdout.decode()}")
+    
+    return article