Better structure

app/utils_worker/compress/runner.py

@@ -0,0 +1,33 @@
+import os
+import subprocess
+import logging
+logger = logging.getLogger(__name__)
+import configuration
+config = configuration.parsed["DOWNLOADS"]
+
+shrink_sizes = []
+
+def shrink_pdf(article):
+    initial_size = os.path.getsize(article.save_path + article.file_name)
+    c = subprocess.run(
+        ["gs", "-sDEVICE=pdfwrite", "-dPDFSETTINGS=/screen", "-dNOPAUSE", "-dBATCH", f"-sOutputFile={config['default_download_path']}/compressed.pdf", f'"{article.save_path + article.file_name}"'],
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE
+    )
+    if c.returncode == 0:
+        m = subprocess.run(
+            ["mv", "-f", f"{config['default_download_path']}/compressed.pdf", article.save_path + article.file_name]
+        )
+        if m.returncode == 0:
+            final_size = os.path.getsize(article.save_path + article.file_name)
+            shrink_sizes.append(initial_size - final_size)
+            logger.info(f"Compression worked. Avg shrinkage: {sum(shrink_sizes)/len(shrink_sizes) / 1000} (kb)")
+            return article # even though no modifications were made
+        else:
+            logger.error(f"Compression ran but I could not copy back the file {m.stderr.decode()} - {m.stdout.decode()}")
+
+
+    else:
+        logger.error(f"Could not run the compression! {c.stderr.decode()} - {c.stdout.decode()}")
+    
+    return article