Support generalized resource filter in client

Introduce new command 'list-filters' to retrieve
enabled resource filters.

```
command: cinder list-filters --resource=volume

output:
+----------------+-------------------------------+
| Resource       | Filters                       |
+----------------+-------------------------------+
| volume         | name, status, image_metadata  |
+----------------+-------------------------------+

```

Also Added new option '--filters' to these list commands:
1. list
2. snapshot-list
3. backup-list
4. attachment-list
5. message-list
6. group-list
7. group-snapshot-list
8. get-pools

Change-Id: I062e6227342ea0d940a8333e84014969c33b49df
Partial: blueprint generalized-filtering-for-cinder-list-resource
Depends-On: 04bd22c1eb371805a3ce9f6c8915325bc0da2d36
Depends-On: 7fdc4688fea373afb85d929e649d311568d1855a

1 files changed, 25 insertions, 0 deletions

diff --git a/cinderclient/shell_utils.py b/cinderclient/shell_utils.py
index e386558..949f7f7 100644
--- a/cinderclient/shell_utils.py
+++ b/cinderclient/shell_utils.py
@@ -143,6 +143,26 @@ def translate_availability_zone_keys(collection):
     translate_keys(collection, convert)
 
 
+def extract_filters(args):
+    filters = {}
+    for f in args:
+        if '=' in f:
+            (key, value) = f.split('=', 1)
+            if value.startswith('{') and value.endswith('}'):
+                value = _build_internal_dict(value[1:-1])
+        filters[key] = value
+
+    return filters
+
+
+def _build_internal_dict(content):
+    result = {}
+    for pair in content.split(','):
+        k, v = pair.split(':', 1)
+        result.update({k.strip(): v.strip()})
+    return result
+
+
 def extract_metadata(args, type='user_metadata'):
     metadata = {}
     if type == 'image_metadata':
@@ -169,6 +189,11 @@ def print_group_type_list(gtypes):
     utils.print_list(gtypes, ['ID', 'Name', 'Description'])
 
 
+def print_resource_filter_list(filters):
+    formatter = {'Filters': lambda resource: ', '.join(resource.filters)}
+    utils.print_list(filters, ['Resource', 'Filters'], formatters=formatter)
+
+
 def quota_show(quotas):
     quotas_info_dict = utils.unicode_key_value_to_string(quotas._info)
     quota_dict = {}