SAAS-596: Store file size and hash in database

Added file size and hash to the metadata dict in the analyzer

python_apps/airtime_analyzer/airtime_analyzer/metadata_analyzer.py

@@ -4,6 +4,8 @@ import mutagen
 import magic
 import wave
 import logging
+import os
+import hashlib
 from analyzer import Analyzer
 
 class MetadataAnalyzer(Analyzer):
@@ -96,6 +98,23 @@ class MetadataAnalyzer(Analyzer):
             #If we couldn't figure out the track_number or track_total, just ignore it...
             pass
 
+        # Get file size and md5 hash of the file
+        try:
+            metadata["filesize"] = os.path.getsize(filename)
+
+            with open(filename, 'rb') as fh:
+                m = hashlib.md5()
+                while True:
+                    data = fh.read(8192)
+                    if not data:
+                        break
+                    m.update(data)
+                metadata["md5_hash"] = m.hexdigest()
+        except (OSError, IOError) as e:
+            raise e
+
+
+
         #We normalize the mutagen tags slightly here, so in case mutagen changes,
         #we find the 
         mutagen_to_airtime_mapping = {