jpgSorter.py

Outsourced jpg processing in own file, corrected behavior when exif is not parsed corretly. reworked the date pick routine.

jpgSorter.py

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+import os.path
+import exifread
+import time
+import shutil
+
+minEventDelta = 60 * 60 * 24 * 4 # 4 days in seconds
+
+def getMinimumCreationTime(exif_data):
+    creationTime = None
+    dateTime = exif_data.get('DateTime')
+    dateTimeOriginal = exif_data.get('EXIF DateTimeOriginal')
+    dateTimeDigitized = exif_data.get('EXIF DateTimeDigitized')
+
+    # 3 differnt time fields that can be set independently result in 9 if-cases
+    if (dateTime is None):
+        if (dateTimeOriginal is None):
+            # case 1/9: dateTime, dateTimeOriginal, and dateTimeDigitized = None
+            # case 2/9: dateTime and dateTimeOriginal = None, then use dateTimeDigitized
+            creationTime = dateTimeDigitized 
+        else:
+            # case 3/9: dateTime and dateTimeDigitized = None, then use dateTimeOriginal
+            # case 4/9: dateTime = None, prefere dateTimeOriginal over dateTimeDigitized
+            creationTime = dateTimeOriginal
+    else:
+        # case 5-9: when creationTime is set, prefere it over the others
+        creationTime = dateTime
+
+    return creationTime
+
+def postprocessImage(images, sourceDir, imageDirectory, fileName):
+    imagePath = os.path.join(sourceDir, fileName)
+    image = open(imagePath, 'rb')
+    try: 
+        exifTags = exifread.process_file(image, details=False)
+    except:
+        print("invalid exif tags for " + fileName)
+    creationTime = getMinimumCreationTime(exifTags)
+
+    # distinct different time types
+    if creationTime is None:
+        creationTime = time.gmtime(os.path.getctime(imagePath))
+    else:
+        creationTime = time.strptime(str(creationTime), "%Y:%m:%d %H:%M:%S")
+
+    images.append((time.mktime(creationTime), imagePath))
+
+
+def createNewFolder(destinationRoot, year, eventNumber):
+    yearPath = os.path.join(destinationRoot, year)
+    if not os.path.exists(yearPath):
+        os.mkdir(yearPath)
+    eventPath = os.path.join(yearPath, str(eventNumber))
+    if not os.path.exists(eventPath):
+        os.mkdir(eventPath)
+
+
+def writeImages(images, destinationRoot):
+    sortedImages = sorted(images)
+    previousTime = None
+    eventNumber = 0
+
+    for imageTuple in sortedImages:
+        t = time.gmtime(imageTuple[0])
+        year = time.strftime("%Y", t)
+        if (previousTime == None) or ((previousTime + minEventDelta) < imageTuple[0]):
+            previousTime = imageTuple[0]
+            eventNumber = eventNumber + 1
+            createNewFolder(destinationRoot, year, eventNumber)
+        
+        previousTime = imageTuple[0]
+
+        destination = os.path.join(destinationRoot, year, str(eventNumber))
+        shutil.copy(imageTuple[1], destination)