Move pdf file check to utils

2 files changed, 12 insertions, 11 deletions

diff --git a/paper2remarkable/providers/_base.py b/paper2remarkable/providers/_base.py
index d427f9e..8e9223e 100644
--- a/paper2remarkable/providers/_base.py
+++ b/paper2remarkable/providers/_base.py
@@ -181,17 +181,6 @@ class Provider(metaclass=abc.ABCMeta):
         self.log("Created filename: %s" % name)
         return name
 
-
-    def check_file_is_pdf(self, filename):
-        try:
-            fp = open(filename, "rb")
-            pdf = PyPDF2.PdfFileReader(fp, strict=False)
-            fp.close()
-            del pdf
-            return True
-        except PyPDF2.utils.PdfReadError:
-            exception("Downloaded file isn't a valid pdf file.")
-
     def download_url(self, url, filename):
         """Download the content of an url and save it to a filename """
         self.log("Downloading file at url: %s" % url)
diff --git a/paper2remarkable/utils.py b/paper2remarkable/utils.py
index af19d22..5188afb 100644
--- a/paper2remarkable/utils.py
+++ b/paper2remarkable/utils.py
@@ -9,6 +9,7 @@ Copyright: 2019, G.J.J. van den Burg
 """
 
 
+import PyPDF2
 import sys
 
 GITHUB_URL = "https://github.com/GjjvdBurg/arxiv2remarkable"
@@ -23,3 +24,14 @@ def exception(msg):
         % GITHUB_URL
     )
     raise SystemExit(1)
+
+
+def check_file_is_pdf(filename):
+    try:
+        fp = open(filename, "rb")
+        pdf = PyPDF2.PdfFileReader(fp, strict=False)
+        fp.close()
+        del pdf
+        return True
+    except PyPDF2.utils.PdfReadError:
+        exception("Downloaded file isn't a valid pdf file.")