check for completed files on startup

1 files changed, 5 insertions, 1 deletions

diff --git a/scrape-codex.py b/scrape-codex.py
index ffec8f7..619f452 100644
--- a/scrape-codex.py
+++ b/scrape-codex.py
@@ -61,6 +61,10 @@ def load_image(fn):
 
 # Fetch all the tiles from a tile server and then compose them into a single image
 def grab(s, n):
+  out_fn = "./{}/{}/{}_{}.jpg".format(TAG, ZOOM, page, ZOOM)
+  if os.path.exists(out_fn):
+    return
+
   page = "{:03d}{}".format(n, s)
   print("Fetching {}...".format(page))
   os.makedirs("./{}/{}/{}".format(TAG, ZOOM, page), exist_ok=True)
@@ -102,7 +106,7 @@ def grab(s, n):
         canvas.paste(image, (x, y))
         y += height
     x += width
-  canvas.save("./{}/{}/{}_{}.jpg".format(TAG, ZOOM, page, ZOOM))
+  canvas.save(out_fn)
 
 if __name__ == '__main__':
   os.makedirs("{}/{}".format(TAG, ZOOM), exist_ok=True)