From 43aaa2c8c0ad1e1e1eb67a1e8a0700745125338e Mon Sep 17 00:00:00 2001
From: SinTan1729 <sayantan.santra689@gmail.com>
Date: Mon, 20 Feb 2023 21:58:09 -0600
Subject: [PATCH] Added convert-for -office-printer.py

---
 README.md                     |  2 +-
 convert-for-office-printer.py | 69 +++++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+), 1 deletion(-)
 create mode 100644 convert-for-office-printer.py

diff --git a/README.md b/README.md
index 29eb825..d0b6b07 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-![Number of scripts](https://img.shields.io/badge/number_of_scripts-33-blue)
+![Number of scripts](https://img.shields.io/badge/number_of_scripts-34-blue)
 # Random Scripts
 This repository is for random scripts I wrote mostly for personal use.
 
diff --git a/convert-for-office-printer.py b/convert-for-office-printer.py
new file mode 100644
index 0000000..4f0cf00
--- /dev/null
+++ b/convert-for-office-printer.py
@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+
+# This is a script to prepare a document to be printed on my office printer
+# which only prints in B&W (not grayscale) letter size pages. It sometimes
+# cuts edges and/or prints colors too light if the conversion to itself.
+# Hence, this script. As a plus, A4 paper is supported too.
+
+# Syntax : script.py filename -o [optional, to overwrite output file]
+
+import sys
+import os
+from pdf2image import convert_from_path
+from PIL import Image
+
+if len(sys.argv) < 3:
+    raise Exception(
+        'Not enough arguments.\nUse the syntax "script.py filename size(letter/a4) -o [optional, to overwrite output file]"')
+
+filename = sys.argv[1]
+if not os.path.isfile(filename):
+    raise Exception('File {} not present', format(filename))
+if filename.split('.')[-1] != 'pdf':
+    raise Exception('Given file is not a PDF')
+if filename.split('/')[-1].split(']')[0] == '[office_print':
+    raise Exception('File has already been processed')
+print('Processing '+filename.split('/')[-1])
+
+overwrite_status = '-n'
+if len(sys.argv) > 3:
+    overwrite_status = sys.argv[3]
+
+page_size = sys.argv[2].lower()
+if page_size not in ["a4", "letter"]:
+    raise Exception(
+        'Unknown paper size! Only supported sizes are A4 and Letter.')
+
+pdf = convert_from_path(filename)
+
+a4size = int(8.27*300), int(11.7*300)
+lettersize = int(8.5*300), int(11*300)
+
+if page_size == "a4":
+    new_size = a4size
+else:
+    new_size = lettersize
+
+pagenum = len(pdf)
+
+new_pdf = list()
+for i in range(pagenum):
+    page = Image.new('L', new_size, 'white')  # The '1' means black and white
+    old_size = pdf[i].size
+    ratio = min(new_size[0]/old_size[0], new_size[1]/old_size[1])
+    resize_to = round(old_size[0]*ratio), round(old_size[1]*ratio)
+    offset = round((new_size[0]-resize_to[0]) /
+                   2), round((new_size[1]-resize_to[1])/2)
+    page.paste(pdf[i].resize(resize_to, Image.LANCZOS), offset)
+    page_bw = page.point(lambda x: round(x/12) if 16 < x < 192 else x, 'L')
+    new_pdf.append(page_bw)
+
+new_filename = '[office_print] ' + \
+    filename.split('/')[-1].split('.')[0] + '.pdf'
+if os.path.isfile(new_filename) and overwrite_status != '-o':
+    raise Exception(
+        'File '+new_filename+' is already present. Add -o at the end to overwrite')
+
+new_pdf[0].save(new_filename, "PDF", quality=100,
+                save_all=True, append_images=new_pdf[1:])
+print('File '+new_filename+' was created.')