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Diffstat (limited to '')
-rw-r--r-- | src/pybind/mgr/dashboard/services/_paginate.py | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/pybind/mgr/dashboard/services/_paginate.py b/src/pybind/mgr/dashboard/services/_paginate.py new file mode 100644 index 000000000..c8ba300a5 --- /dev/null +++ b/src/pybind/mgr/dashboard/services/_paginate.py @@ -0,0 +1,71 @@ +from typing import Any, Dict, List + +from ..exceptions import DashboardException + + +class ListPaginator: + # pylint: disable=W0102 + def __init__(self, offset: int, limit: int, sort: str, search: str, + input_list: List[Any], default_sort: str, + searchable_params: List[str] = [], sortable_params: List[str] = []): + self.offset = offset + if limit < -1: + raise DashboardException(msg=f'Wrong limit value {limit}', code=400) + self.limit = limit + self.sort = sort + self.search = search + self.input_list = input_list + self.default_sort = default_sort + self.searchable_params = searchable_params + self.sortable_params = sortable_params + self.count = len(self.input_list) + + def get_count(self): + return self.count + + def find_value(self, item: Dict[str, Any], key: str): + # dot separated keys to lookup nested values + keys = key.split('.') + value = item + for nested_key in keys: + if nested_key in value: + value = value[nested_key] + else: + return '' + return value + + def list(self): + end = self.offset + self.limit + # '-1' is a special number to refer to all items in list + if self.limit == -1: + end = len(self.input_list) + + if not self.sort: + self.sort = self.default_sort + + desc = self.sort[0] == '-' + sort_by = self.sort[1:] + + if sort_by not in self.sortable_params: + sort_by = self.default_sort[1:] + + # trim down by search + trimmed_list = [] + if self.search: + for item in self.input_list: + for searchable_param in self.searchable_params: + value = self.find_value(item, searchable_param) + if isinstance(value, str): + if self.search in str(value): + trimmed_list.append(item) + + else: + trimmed_list = self.input_list + + def sort(item): + return self.find_value(item, sort_by) + + sorted_list = sorted(trimmed_list, key=sort, reverse=desc) + self.count = len(sorted_list) + for item in sorted_list[self.offset:end]: + yield item |