Moving Pagination class to its own file

jupyterhub/handlers/pages.py

@@ -23,6 +23,7 @@ from ..utils import admin_only
 from ..utils import maybe_future
 from ..utils import url_path_join
 from .base import BaseHandler
+from ..pagination import Pagination
 
 
 class RootHandler(BaseHandler):
@@ -605,70 +606,6 @@ class HealthCheckHandler(BaseHandler):
     def get(self, *args):
         self.finish()
 
-
-class Pagination():
-
-    _page_name = 'page'
-    _per_page_name = 'per_page'
-    _default_page = 1
-    _default_per_page = 100
-    _max_per_page = 250
-    _record_name = 'users'
-    _display_msg = (
-        'Displaying {record_name} <b>{start} - {end}</b>. Total {record_name}: {total}'
-    )
-
-    def __init__(self, *args, **kwargs):
-        """Potential parameters.
-        **url**: URL in request
-        **page**: current page in use
-        **per_page**: number of records to display in the page. By default 100
-        **total**: total records considered while paginating
-        **display_msg**: informative text for pagination
-        **record_name**: name of the record, showed in pagination info
-        """
-        self.page = kwargs.get(self._page_name, 1)
-
-        if self.per_page > self._max_per_page:
-            self.per_page = self._max_per_page
-
-        self.total = int(kwargs.get('total', 0))
-        self.display_msg = kwargs.get('display_msg', self._display_msg)
-
-        self.record_name = kwargs.get('record_name', self._record_name)
-        self.url = kwargs.get('url') or self.get_url()
-        self.init_values()
-
-    def init_values(self):
-        self._cached = {}
-        self.skip = (self.page - 1) * self.per_page
-        pages = divmod(self.total, self.per_page)
-        self.total_pages = pages[0] + 1 if pages[1] else pages[0]
-
-        self.has_prev = self.page > 1
-        self.has_next = self.page < self.total_pages
-
-    @classmethod
-    def get_page_args(self, handler):
-        self.page = handler.get_argument(self._page_name, self._default_page)
-        self.per_page = handler.get_argument(
-            self._per_page_name, self._default_per_page
-        )
-        try:
-            self.per_page = int(self.per_page)
-            if self.per_page > self._max_per_page:
-                self.per_page = self._max_per_page
-        except:
-            self.per_page = self._default_per_page
-
-        try:
-            self.page = int(self.page)
-        except:
-            self.page = self._default_page
-
-        return self.page, self.per_page, self.per_page * (self.page - 1)
-
-
 default_handlers = [
     (r'/', RootHandler),
     (r'/home', HomeHandler),