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Strategies
==========
Different strategies are defined to encapsulate the different frameworks
capabilities under a common API to reuse as much code as possible.
Description
-----------
An strategy responsibility is to provide access to:
* Request data and host information and URI building
* Session access
* Project settings
* Response types (HTML and redirects)
* HTML rendering
Different frameworks implement these features on different ways, thus the need
for these interfaces.
Implementing a new Strategy
---------------------------
The following methods must be defined on strategies sub-classes.
Request::
def request_data(self):
"""Return current request data (POST or GET)"""
raise NotImplementedError('Implement in subclass')
def request_host(self):
"""Return current host value"""
raise NotImplementedError('Implement in subclass')
def build_absolute_uri(self, path=None):
"""Build absolute URI with given (optional) path"""
raise NotImplementedError('Implement in subclass')
Session::
def session_get(self, name):
"""Return session value for given key"""
raise NotImplementedError('Implement in subclass')
def session_set(self, name, value):
"""Set session value for given key"""
raise NotImplementedError('Implement in subclass')
def session_pop(self, name):
"""Pop session value for given key"""
raise NotImplementedError('Implement in subclass')
Settings::
def get_setting(self, name):
"""Return value for given setting name"""
raise NotImplementedError('Implement in subclass')
Responses::
def html(self, content):
"""Return HTTP response with given content"""
raise NotImplementedError('Implement in subclass')
def redirect(self, url):
"""Return a response redirect to the given URL"""
raise NotImplementedError('Implement in subclass')
def render_html(self, tpl=None, html=None, context=None):
"""Render given template or raw html with given context"""
raise NotImplementedError('Implement in subclass')
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