vikunja-api/pkg/models/namespace_rights.go

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// Vikunja is a to-do list application to facilitate your life.
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// Copyright 2018-2020 Vikunja and contributors. All rights reserved.
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//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
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//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
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//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
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package models
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import (
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"code.vikunja.io/web"
"xorm.io/builder"
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)
// CanWrite checks if a user has write access to a namespace
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func (n *Namespace) CanWrite(a web.Auth) (bool, error) {
can, _, err := n.checkRight(a, RightWrite, RightAdmin)
return can, err
}
// IsAdmin returns true or false if the user is admin on that namespace or not
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func (n *Namespace) IsAdmin(a web.Auth) (bool, error) {
is, _, err := n.checkRight(a, RightAdmin)
return is, err
}
// CanRead checks if a user has read access to that namespace
func (n *Namespace) CanRead(a web.Auth) (bool, int, error) {
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return n.checkRight(a, RightRead, RightWrite, RightAdmin)
}
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// CanUpdate checks if the user can update the namespace
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func (n *Namespace) CanUpdate(a web.Auth) (bool, error) {
return n.IsAdmin(a)
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}
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// CanDelete checks if the user can delete a namespace
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func (n *Namespace) CanDelete(a web.Auth) (bool, error) {
return n.IsAdmin(a)
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}
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// CanCreate checks if the user can create a new namespace
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func (n *Namespace) CanCreate(a web.Auth) (bool, error) {
if _, is := a.(*LinkSharing); is {
return false, nil
}
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// This is currently a dummy function, later on we could imagine global limits etc.
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return true, nil
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}
func (n *Namespace) checkRight(a web.Auth, rights ...Right) (bool, int, error) {
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// If the auth is a link share, don't do anything
if _, is := a.(*LinkSharing); is {
return false, 0, nil
}
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// Get the namespace and check the right
nn := &Namespace{ID: n.ID}
err := nn.GetSimpleByID()
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if err != nil {
return false, 0, err
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}
if a.GetID() == n.OwnerID {
return true, int(RightAdmin), nil
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}
/*
The following loop creates an sql condition like this one:
namespaces.owner_id = 1 OR
(users_namespace.user_id = 1 AND users_namespace.right = 1) OR
(team_members.user_id = 1 AND team_namespaces.right = 1) OR
for each passed right. That way, we can check with a single sql query (instead if 8)
if the user has the right to see the list or not.
*/
var conds []builder.Cond
conds = append(conds, builder.Eq{"namespaces.owner_id": a.GetID()})
for _, r := range rights {
// User conditions
// If the namespace was shared directly with the user and the user has the right
conds = append(conds, builder.And(
builder.Eq{"users_namespace.user_id": a.GetID()},
builder.Eq{"users_namespace.right": r},
))
// Team rights
// If the namespace was shared directly with the team and the team has the right
conds = append(conds, builder.And(
builder.Eq{"team_members.user_id": a.GetID()},
builder.Eq{"team_namespaces.right": r},
))
}
type allRights struct {
UserNamespace NamespaceUser `xorm:"extends"`
TeamNamespace TeamNamespace `xorm:"extends"`
}
var maxRights = 0
r := &allRights{}
exists, err := x.Select("*").
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Table("namespaces").
// User stuff
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Join("LEFT", "users_namespace", "users_namespace.namespace_id = namespaces.id").
// Teams stuff
Join("LEFT", "team_namespaces", "namespaces.id = team_namespaces.namespace_id").
Join("LEFT", "team_members", "team_members.team_id = team_namespaces.team_id").
// The actual condition
Where(builder.And(
builder.Or(
conds...,
),
builder.Eq{"namespaces.id": n.ID},
)).
Exist(r)
// Figure out the max right and return it
if int(r.UserNamespace.Right) > maxRights {
maxRights = int(r.UserNamespace.Right)
}
if int(r.TeamNamespace.Right) > maxRights {
maxRights = int(r.TeamNamespace.Right)
}
return exists, maxRights, err
}