Add script to compress images

The script was executed to compress some author images.

Author: jmloyola

_utils/compress_images.py

@@ -0,0 +1,57 @@
+"""
+Comprass images using ImageMagick
+
+Command used to compress images:
+python compress_images.py --quality 30 --replace_original --pattern "../assets/images/author_images/*"
+"""
+
+
+import argparse
+import glob
+import os
+import subprocess
+
+
+SIZE_THRESHOLD = 25
+# Version: ImageMagick 6.9.7-4 Q16 x86_64 20170114 http://www.imagemagick.org
+IMAGEMAGICK_COMMAND = r'convert -sampling-factor 4:2:0 -strip -interlace JPEG -colorspace RGB'
+
+
+def compress_image(image_path, quality, replace_original=False):
+    # Image size in Kilobytes
+    image_size = os.path.getsize(image_path) / 1000
+    if image_size > SIZE_THRESHOLD:
+        print(f"Compressing image '{image_path}' ({image_size}K)")
+        if replace_original:
+            new_path = image_path
+        else:
+            file_name, extension = os.path.basename(image_path).split(".")
+            new_file_name = file_name + "_reduced." + extension
+            new_path = os.path.join(os.path.dirname(image_path), new_file_name)
+        subprocess.run(f"{IMAGEMAGICK_COMMAND} -quality {quality}% {image_path} {new_path}", shell=True)
+        print(f">>> New file created: '{new_path}'")
+    else:
+        print(f"The image '{image_path}' ({image_size}K) does not need compression.")
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Script to compress images using ImageMagick.")
+    parser.add_argument("--quality", help="compression level", type=int, default=50)
+    parser.add_argument("--replace_original", help="replace original image with compressed one", action='store_true')
+    group = parser.add_mutually_exclusive_group(required=True)
+    group.add_argument("--file_path", help="image file path", action="append", type=str)
+    group.add_argument("--pattern", help="glob pattern for images", type=str)
+    args = parser.parse_args()
+    print(f"Compressing images with size greater than {SIZE_THRESHOLD}K.")
+
+    if args.file_path:
+        print(args.file_path)
+        for p in args.file_path:
+            if os.path.exists(p):
+                compress_image(p, args.quality, args.replace_original)
+            else:
+                print(f"ERROR: The file '{p}' does not exists.")
+    else:
+        paths = glob.glob(args.pattern)
+        for p in paths:
+            compress_image(p, args.quality, args.replace_original)