Partially completed backend development of permissions management

api/lib/perm/acl/role.py

@@ -0,0 +1,168 @@
+# -*- coding:utf-8 -*-
+
+
+from flask import abort
+
+from api.extensions import db
+from api.lib.perm.acl.cache import RoleCache
+from api.lib.perm.acl.cache import RoleRelationCache
+from api.lib.perm.acl.const import ACL_QUEUE
+from api.models.acl import Resource
+from api.models.acl import ResourceGroupItems
+from api.models.acl import Role
+from api.models.acl import RolePermission
+from api.models.acl import RoleRelation
+from api.tasks.acl import role_rebuild
+
+
+class RoleRelationCRUD(object):
+    pass
+
+
+class RoleCRUD(object):
+    @staticmethod
+    def search(q, app_id, page=1, page_size=None):
+        query = db.session.query(Role).filter(Role.deleted.is_(False)).filter(
+            Role.app_id == app_id).filter(Role.uid.is_(None))
+        if q:
+            query = query.filter(Role.name.ilike('%{0}%'.format(q)))
+
+        numfound = query.count()
+
+        return numfound, query.offset((page - 1) * page_size).limit(page_size)
+
+    @staticmethod
+    def add_role(name, app_id, is_app_admin=False, uid=None):
+        Role.get_by(name=name, app_id=app_id) and abort(400, "Role <{0}> is already existed".format(name))
+
+        return Role.create(name=name,
+                           app_id=app_id,
+                           is_app_admin=is_app_admin,
+                           uid=uid)
+
+    @staticmethod
+    def update_role(rid, **kwargs):
+        role = Role.get_by_id(rid) or abort(404, "Role <{0}> does not exist".format(rid))
+
+        RoleCache.clean(rid)
+
+        return role.update(**kwargs)
+
+    @classmethod
+    def delete_role(cls, rid):
+        role = Role.get_by_id(rid) or abort(404, "Role <{0}> does not exist".format(rid))
+
+        parent_ids = cls.get_parent_ids(rid)
+        child_ids = cls.get_child_ids(rid)
+
+        for i in RoleRelation.get_by(parent_id=rid, to_dict=False):
+            i.soft_delete()
+        for i in RoleRelation.get_by(child_id=rid, to_dict=False):
+            i.soft_delete()
+
+        for i in RolePermission.get_by(rid=rid, to_dict=False):
+            i.soft_delete()
+
+        role_rebuild.apply_async(args=(parent_ids + child_ids,), queue=ACL_QUEUE)
+
+        RoleCache.clean(rid)
+        RoleRelationCache.clean(rid)
+
+        role.soft_delete()
+
+    @staticmethod
+    def get_resources(rid):
+        res = RolePermission.get_by(rid=rid, to_dict=False)
+        id2perms = dict(id2perms={}, group2perms={})
+        for i in res:
+            if i.resource_id:
+                id2perms['id2perms'].setdefault(i.resource_id, []).append(i.perm.name)
+            elif i.group_id:
+                id2perms['group2perms'].setdefault(i.group_id, []).append(i.perm.name)
+
+        return id2perms
+
+    @staticmethod
+    def get_group_ids(resource_id):
+        return [i.group_id for i in ResourceGroupItems.get_by(resource_id, to_dict=False)]
+
+    @staticmethod
+    def get_parent_ids(rid):
+        res = RoleRelation.get_by(child_id=rid, to_dict=False)
+
+        return [i.parent_id for i in res]
+
+    @staticmethod
+    def get_child_ids(rid):
+        res = RoleRelation.get_by(child_id=rid, to_dict=False)
+
+        return [i.parent_id for i in res]
+
+    @classmethod
+    def recursive_parent_ids(cls, rid):
+        all_parent_ids = set()
+
+        def _get_parent(_id):
+            all_parent_ids.add(_id)
+            parent_ids = RoleRelationCache.get_parent_ids(_id)
+            for parent_id in parent_ids:
+                _get_parent(parent_id)
+
+        _get_parent(rid)
+
+        return all_parent_ids
+
+    @classmethod
+    def recursive_child_ids(cls, rid):
+        all_child_ids = set()
+
+        def _get_children(_id):
+            all_child_ids.add(_id)
+            child_ids = RoleRelationCache.get_child_ids(_id)
+            for child_id in child_ids:
+                _get_children(child_id)
+
+        _get_children(rid)
+
+        return all_child_ids
+
+    @classmethod
+    def has_permission(cls, rid, resource_name, perm):
+        resource = Resource.get_by(name=resource_name, first=True, to_dict=False)
+        resource = resource or abort(403, "Resource <{0}> is not in ACL".format(resource_name))
+
+        parent_ids = cls.recursive_parent_ids(rid)
+
+        group_ids = cls.get_group_ids(resource.id)
+
+        for parent_id in parent_ids:
+            id2perms = RoleRelationCache.get_resources(parent_id)
+
+            perms = id2perms['id2perms'].get(resource.id, [])
+            if perms and {perm}.issubset(set(perms)):
+                return True
+
+            for group_id in group_ids:
+                perms = id2perms['group2perms'].get(group_id, [])
+                if perms and {perm}.issubset(set(perms)):
+                    return True
+
+        return False
+
+    @classmethod
+    def get_permissions(cls, rid, resource_name):
+        resource = Resource.get_by(name=resource_name, first=True, to_dict=False)
+        resource = resource or abort(403, "Resource <{0}> is not in ACL".format(resource_name))
+
+        parent_ids = cls.recursive_parent_ids(rid)
+        group_ids = cls.get_group_ids(resource.id)
+
+        perms = []
+        for parent_id in parent_ids:
+            id2perms = RoleRelationCache.get_resources(parent_id)
+            perms += id2perms['id2perms'].get(parent_id, [])
+
+            for group_id in group_ids:
+                perms += id2perms['group2perms'].get(group_id, [])
+
+        return set(perms)