X-Git-Url: https://git.mdrn.pl/redakcja.git/blobdiff_plain/ce8d791a5298e0cb2569034aec4c8b57afac97b2..1dde5a89c598158a3663e1586fc5ac061b9bf542:/apps/catalogue/helpers.py

diff --git a/apps/catalogue/helpers.py b/apps/catalogue/helpers.py
index 7bc24819..060d106c 100644
--- a/apps/catalogue/helpers.py
+++ b/apps/catalogue/helpers.py
@@ -1,6 +1,18 @@
+# -*- coding: utf-8 -*-
+import filecmp
+import json
+import re
+from datetime import date
 from functools import wraps
+from inspect import getargspec
+from os import listdir
+from os.path import join
+from shutil import move, rmtree
 
-from django.db.models import Count
+from django.conf import settings
+from django.http import HttpResponse
+from django.template import RequestContext
+from django.template.loader import render_to_string
 
 
 def active_tab(tab):
@@ -28,3 +40,167 @@ def cached_in_field(field_name):
             return value
         return wrapped
     return decorator
+
+
+class AjaxError(Exception):
+    pass
+
+
+def ajax(method, template=None, login_required=False, permission_required=None):
+    def decorator(fun):
+        @wraps(fun)
+        def ajax_view(request):
+            kwargs = {}
+            request_params = None
+            if method == 'post':
+                request_params = request.POST
+            elif method == 'get':
+                request_params = request.GET
+            fun_params, xx, fun_kwargs, defaults = getargspec(fun)
+            if defaults:
+                required_params = fun_params[1:-len(defaults)]
+            else:
+                required_params = fun_params[1:]
+            missing_params = set(required_params) - set(request_params)
+            if missing_params:
+                res = {
+                    'result': 'error',
+                    'msg': 'missing params: %s' % ', '.join(missing_params),
+                }
+            else:
+                if request_params:
+                    request_params = dict(
+                        (key, json.loads(value))
+                        for key, value in request_params.iteritems()
+                        if fun_kwargs or key in fun_params)
+                    kwargs.update(request_params)
+                res = None
+                if login_required and not request.user.is_authenticated():
+                    res = {'result': 'error', 'msg': 'logout'}
+                if (permission_required and
+                        not request.user.has_perm(permission_required)):
+                    res = {'result': 'error', 'msg': 'access denied'}
+            if not res:
+                try:
+                    res = fun(request, **kwargs)
+                    if res and template:
+                        res = {'html': render_to_string(template, res, RequestContext(request))}
+                except AjaxError as e:
+                    res = {'result': e.args[0]}
+            if 'result' not in res:
+                res['result'] = 'ok'
+            return HttpResponse(json.dumps(res), content_type='application/json; charset=utf-8')
+
+        return ajax_view
+
+    return decorator
+
+
+def parse_isodate(isodate):
+    try:
+        return date(*[int(p) for p in isodate.split('-')])
+    except (AttributeError, TypeError, ValueError):
+        raise ValueError("Not a date in ISO format.")
+
+
+class GalleryMerger(object):
+    def __init__(self, dest_gallery, src_gallery):
+        self.dest = dest_gallery
+        self.src = src_gallery
+        self.dest_size = None
+        self.src_size = None
+        self.num_deleted = 0
+
+    @staticmethod
+    def path(gallery):
+        return join(settings.MEDIA_ROOT, settings.IMAGE_DIR, gallery)
+
+    @staticmethod
+    def get_prefix(name):
+        m = re.match(r"^([0-9])-", name)
+        if m:
+            return int(m.groups()[0])
+        return None
+
+    @staticmethod
+    def set_prefix(name, prefix, always=False):
+        m = not always and re.match(r"^([0-9])-", name)
+        return "%1d-%s" % (prefix, m and name[2:] or name)
+
+    @property
+    def was_merged(self):
+        """Check if we have gallery size recorded"""
+        return self.dest_size is not None
+
+    def merge(self):
+        if not self.dest:
+            return self.src
+        if not self.src:
+            return self.dest
+
+        files = listdir(self.path(self.dest))
+        files.sort()
+        self.dest_size = len(files)
+        files_other = listdir(self.path(self.src))
+        files_other.sort()
+        self.src_size = len(files_other)
+
+        if files and files_other:
+            print "compare %s with %s" % (files[-1], files_other[0])
+            if filecmp.cmp(
+                    join(self.path(self.dest), files[-1]),
+                    join(self.path(self.src), files_other[0]),
+                    False
+                    ):
+                files_other.pop(0)
+                self.num_deleted = 1
+
+        prefixes = {}
+        renamed_files = {}
+        renamed_files_other = {}
+        last_pfx = -1
+
+        # check if all elements of my files have a prefix
+        files_prefixed = True
+        for f in files:
+            p = self.get_prefix(f)
+            if p:
+                if p > last_pfx:
+                    last_pfx = p
+            else:
+                files_prefixed = False
+                break
+
+        # if not, add a 0 prefix to them
+        if not files_prefixed:
+            prefixes[0] = 0
+            for f in files:
+                renamed_files[f] = self.set_prefix(f, 0, True)
+
+        # two cases here - either all are prefixed or not.
+        files_other_prefixed = True
+        for f in files_other:
+            pfx = self.get_prefix(f)
+            if pfx is not None:
+                if pfx not in prefixes:
+                    last_pfx += 1
+                    prefixes[pfx] = last_pfx
+                renamed_files_other[f] = self.set_prefix(f, prefixes[pfx])
+            else:
+                # ops, not all files here were prefixed.
+                files_other_prefixed = False
+                break
+
+        # just set a 1- prefix to all of them
+        if not files_other_prefixed:
+            for f in files_other:
+                renamed_files_other[f] = self.set_prefix(f, 1, True)
+
+        # finally, move / rename files.
+        for frm, to in renamed_files.items():
+            move(join(self.path(self.dest), frm), join(self.path(self.dest), to))
+        for frm, to in renamed_files_other.items():
+            move(join(self.path(self.src), frm), join(self.path(self.dest), to))
+
+        rmtree(join(self.path(self.src)))
+        return self.dest