Ticket #8037: ajaxtag.py

# -*- coding: utf-8 -*-
# GitHub http://gist.github.com/3247
from django import template
from django.template import resolve_variable

register = template.Library()

'''
ROR link_to_remote clone

Example 1:
{% ajax %}
link_to_remote 
  url:/dashboard/serverstatus/
  update:#server_status_body
  data:maxcount=10
{% endajax %}

Example 2:
{% ajax %}
link_to_remote 
        url:/dashboard/server/
        update:#server
{% endajax %}
'''

def parseAjaxCmd(output):
    """parse ajax command"""
    ajax_template={'link_to_remote':'''
    <script>
        $.ajax({
                type:'GET',
                url:'%(url)s',
                dataType:'html',
                data: "%(data)s",
                success: function(msg){
                        $("%(update)s").html(msg)
                }
        })
        </script>
    '''}
    output=filter(lambda x:x!='',
        map(lambda x:x.strip(),
            output.split('\n')
        )
    )
    ajaxcmd,params=output[0],output[1:]
    tmpl=ajax_template.get(ajaxcmd,'')
    if tmpl=='':return ''
    param_dict={'url':'/','data':'','update':'results'}
    param_dict.update(
        dict( [p.split(":") for p in params] )
    )
    print "param_dict",param_dict
    return tmpl%param_dict

class AjaxTagsNode(template.Node):
    def __init__(self,nodelist):
        self.nodelist = nodelist
    def render(self, context):
        output = self.nodelist.render(context)
        return parseAjaxCmd(output)

@register.tag('ajax')
def ajaxtag(parser, token):
    """
    {% ajax %}
    {% endajax %}
    """
    nodelist = parser.parse(('endajax',))
    parser.delete_first_token()
    return AjaxTagsNode(nodelist)