Multi-column search tables support

Implement multi-column search tables directly implemented
on updated django-tables2 instead of ajax. Search data is
retained in the GET request which allows bookmarking
individual search results.

Multiple types of search are supported: simple text searches, exclusive
term searches and time based filters.

Click on column headers to re-order the table. Sorts are persistent via the query
string. If multiple tables exist on a page, tables use a prefix to distinguish
sort ordering.

Pagination is controlled by the length GET parameter, using a prefix for pages
with more than one table.

The search box only shows if the table supports simple searches - a help text is
displayed showing the fields which are supported.

The LAVA Overview includes a section on LAVA Tables.
Test cases included.

Stevan Radaković: column sort icons support & length selection javascript.

Majority of dashboard tables now migrated.

Change-Id: I6a79bd703da207cbbf9b7704b919e00aad2679c7

1 files changed, 64 insertions, 0 deletions

diff --git a/lava_scheduler_app/templatetags/tables.py b/lava_scheduler_app/templatetags/tables.py
new file mode 100644
index 000000000..7752e6774
--- /dev/null
+++ b/lava_scheduler_app/templatetags/tables.py
@@ -0,0 +1,64 @@
+from django import template
+from django.db.models import fields
+from django.utils.html import escape
+from django.utils.safestring import mark_safe
+
+register = template.Library()
+
+
+@register.filter
+def get_prefix_length(table, string):
+    name = "%s%s" % (table.prefix, "length")
+    if name in string:
+        return string[name]
+    return table.length
+
+
+@register.filter
+def get_search_data(data, prefix):
+    if not data:
+        return []
+    if prefix in data:
+        return data[prefix]
+    if 'search' in data:
+        return data['search']
+    return []
+
+
+@register.filter
+def get_terms_data(data, prefix):
+    if not data:
+        return []
+    if prefix in data:
+        return data[prefix].values()
+    if 'terms' in data:
+        return data['terms'].values()
+    return []
+
+
+@register.filter
+def get_discrete_data(data, prefix):
+    if not data:
+        return []
+    if prefix in data:
+        return data[prefix]
+    if 'discrete' in data:
+        return data['discrete']
+    return []
+
+
+@register.filter
+def get_length_select(table, string):
+    select = ""
+    val = [10, 25, 50, 100]
+    name = "%s%s" % (table.prefix, "length")
+    if name in string:
+        num = int(string[name])
+    else:
+        num = table.length
+    if num and num not in val:
+        val.append(num)
+        val.sort()
+    for option in val:
+        select += "<option selected>%d</option>" % option if option == num else "<option>%d</option>" % option
+    return mark_safe(select)