From d36ecb0266db608dffbc0308e9b2666c93696672 Mon Sep 17 00:00:00 2001
From: Evgeny Sorokin <me@ch1p.io>
Date: Wed, 26 Jun 2024 00:42:46 +0300
Subject: initial

---
 main.py | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100755 main.py

(limited to 'main.py')

diff --git a/main.py b/main.py
new file mode 100755
index 0000000..db0c80e
--- /dev/null
+++ b/main.py
@@ -0,0 +1,86 @@
+#!/usr/bin/env python3
+import os
+import requests
+import tempfile
+import re
+
+from argparse import ArgumentParser
+from PIL import Image
+
+
+def extract_uuid(url):
+    uuid_pattern = re.compile(r'[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}')
+    match = uuid_pattern.search(url)
+    return match.group(0) if match else None
+
+
+def fetch_manifest(uuid):
+    url = f'https://iiif.bodleian.ox.ac.uk/iiif/manifest/{uuid}.json'
+    try:
+        response = requests.get(url)
+        response.raise_for_status()
+        return response.json()
+    except requests.exceptions.RequestException as e:
+        print(f"Error fetching JSON data: {e}")
+        return None
+
+
+def calculate_chunks(image_width, image_height, chunk_size=4000):
+    chunks = []
+    for y in range(0, image_height, chunk_size):
+        for x in range(0, image_width, chunk_size):
+            width = min(chunk_size, image_width - x)
+            height = min(chunk_size, image_height - y)
+            chunks.append((x, y, width, height))
+    return chunks
+
+
+def generate_url(uuid, x, y, width, height):
+    return f'https://iiif.bodleian.ox.ac.uk/iiif/image/{uuid}/{x},{y},{width},{height}/{width},{height}/0/default.jpg'
+
+
+def download_chunk(url, save_path):
+    response = requests.get(url, stream=True)
+    if response.status_code == 200:
+        with open(save_path, 'wb') as f:
+            for chunk in response.iter_content(1024):
+                f.write(chunk)
+    else:
+        raise Exception(f"Failed to download chunk: {url}")
+
+
+def merge_chunks(image_width, image_height, chunk_paths):
+    full_image = Image.new('RGB', (image_width, image_height))
+    for (x, y, width, height), path in chunk_paths:
+        chunk = Image.open(path)
+        full_image.paste(chunk, (x, y))
+    return full_image
+
+
+def download_and_merge_image(image_width, image_height, image_uuid, output_file):
+    chunks = calculate_chunks(image_width, image_height)
+    chunk_paths = []
+
+    with tempfile.TemporaryDirectory() as temp_dir:
+        for i, (x, y, width, height) in enumerate(chunks):
+            url = generate_url(image_uuid, x, y, width, height)
+            chunk_path = os.path.join(temp_dir, f"chunk_{i}.jpg")
+            download_chunk(url, chunk_path)
+            chunk_paths.append(((x, y, width, height), chunk_path))
+
+        full_image = merge_chunks(image_width, image_height, chunk_paths)
+        full_image.save(output_file)
+
+
+if __name__ == '__main__':
+    parser = ArgumentParser()
+    parser.add_argument('--uuid', type=str, required=True)
+    parser.add_argument('--output-dir', type=str, required=True)
+    args = parser.parse_args()
+
+    m = fetch_manifest(args.uuid)
+    page = 0
+    for c in m['sequences'][0]['canvases']:
+        download_and_merge_image(c['width'], c['height'], extract_uuid(c['@id']), os.path.join(args.output_dir, f'{page}.jpg'))
+        print(f'{page} done')
+        page += 1
-- 
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