Refactor ListTask to Task (#92)

pkg/models/tasks_rights.go

@@ -0,0 +1,65 @@
+//  Vikunja is a todo-list application to facilitate your life.
+//  Copyright 2018 Vikunja and contributors. All rights reserved.
+//
+//  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.
+//
+//  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.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package models
+
+import (
+	"code.vikunja.io/web"
+)
+
+// CanDelete checks if the user can delete an task
+func (t *Task) CanDelete(a web.Auth) (bool, error) {
+	return t.canDoTask(a)
+}
+
+// CanUpdate determines if a user has the right to update a list task
+func (t *Task) CanUpdate(a web.Auth) (bool, error) {
+	return t.canDoTask(a)
+}
+
+// CanCreate determines if a user has the right to create a list task
+func (t *Task) CanCreate(a web.Auth) (bool, error) {
+	// A user can do a task if he has write acces to its list
+	l := &List{ID: t.ListID}
+	return l.CanWrite(a)
+}
+
+// CanRead determines if a user can read a task
+func (t *Task) CanRead(a web.Auth) (canRead bool, err error) {
+	//return t.canDoTask(a)
+	// Get the task, error out if it doesn't exist
+	*t, err = GetTaskByIDSimple(t.ID)
+	if err != nil {
+		return
+	}
+
+	// A user can read a task if it has access to the list
+	list := &List{ID: t.ListID}
+	return list.CanRead(a)
+}
+
+// Helper function to check if a user can do stuff on a list task
+func (t *Task) canDoTask(a web.Auth) (bool, error) {
+	// Get the task
+	lI, err := GetTaskByIDSimple(t.ID)
+	if err != nil {
+		return false, err
+	}
+
+	// A user can do a task if he has write acces to its list
+	l := &List{ID: lI.ListID}
+	return l.CanWrite(a)
+}