Dodanie sorl.thumbnail i generowanie miniaturek logo na potrzeby aplikacji sponsors.

[wolnelektury.git] / apps / sorl / thumbnail / management / commands / thumbnail_cleanup.py

diff --git a/apps/sorl/thumbnail/management/commands/thumbnail_cleanup.py b/apps/sorl/thumbnail/management/commands/thumbnail_cleanup.py
new file mode 100644 (file)
index 0000000..690c42c
--- /dev/null
+++ b/apps/sorl/thumbnail/management/commands/thumbnail_cleanup.py
@@ -0,0 +1,75 @@
+import os
+import re
+from django.db import models
+from django.conf import settings
+from django.core.management.base import NoArgsCommand
+from sorl.thumbnail.main import get_thumbnail_setting
+
+
+try:
+    set
+except NameError:
+    from sets import Set as set     # For Python 2.3
+
+thumb_re = re.compile(r'^%s(.*)_\d{1,}x\d{1,}_[-\w]*q([1-9]\d?|100)\.jpg' %
+                      get_thumbnail_setting('PREFIX'))
+
+
+def get_thumbnail_path(path):
+    basedir = get_thumbnail_setting('BASEDIR')
+    subdir = get_thumbnail_setting('SUBDIR')
+    return os.path.join(basedir, path, subdir)
+
+
+def clean_up():
+    paths = set()
+    for app in models.get_apps():
+        model_list = models.get_models(app)
+        for model in model_list:
+            for field in model._meta.fields:
+                if isinstance(field, models.ImageField):
+                    #TODO: take care of date formatted and callable upload_to.
+                    if (not callable(field.upload_to) and
+                            field.upload_to.find("%") == -1):
+                        paths = paths.union((field.upload_to,))
+    paths = list(paths)
+    for path in paths:
+        thumbnail_path = get_thumbnail_path(path)
+        try:
+            file_list = os.listdir(os.path.join(settings.MEDIA_ROOT,
+                                                thumbnail_path))
+        except OSError:
+            continue # Dir doesn't exists, no thumbnails here.
+        for fn in file_list:
+            m = thumb_re.match(fn)
+            if m:
+                # Due to that the naming of thumbnails replaces the dot before
+                # extension with an underscore we have 2 possibilities for the
+                # original filename. If either present we do not delete
+                # suspected thumbnail.
+                # org_fn is the expected original filename w/o extension
+                # org_fn_alt is the expected original filename with extension
+                org_fn = m.group(1)
+                org_fn_exists = os.path.isfile(
+                            os.path.join(settings.MEDIA_ROOT, path, org_fn))
+
+                usc_pos = org_fn.rfind("_")
+                if usc_pos != -1:
+                    org_fn_alt = "%s.%s" % (org_fn[0:usc_pos],
+                                            org_fn[usc_pos+1:])
+                    org_fn_alt_exists = os.path.isfile(
+                        os.path.join(settings.MEDIA_ROOT, path, org_fn_alt))
+                else:
+                    org_fn_alt_exists = False
+                if not org_fn_exists and not org_fn_alt_exists:
+                    del_me = os.path.join(settings.MEDIA_ROOT,
+                                          thumbnail_path, fn)
+                    os.remove(del_me)
+
+
+class Command(NoArgsCommand):
+    help = "Deletes thumbnails that no longer have an original file."
+    requires_model_validation = False
+
+    def handle_noargs(self, **options):
+        clean_up()