source: trunk/eraser/Eraser/TaskPropertiesForm.cs @ 2324

/* 
 * $Id$
 * Copyright 2008-2010 The Eraser Project
 * Original Author: Joel Low <lowjoel@users.sourceforge.net>
 * Modified By:
 * 
 * This file is part of Eraser.
 * 
 * Eraser 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.
 * 
 * Eraser 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.
 * 
 * A copy of the GNU General Public License can be found at
 * <http://www.gnu.org/licenses/>.
 */

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Linq;
using System.IO;

using System.Globalization;
using Eraser.Manager;
using Eraser.Util;
using Eraser.Util.ExtensionMethods;

namespace Eraser
{
    public partial class TaskPropertiesForm : Form
    {
        public TaskPropertiesForm()
        {
            InitializeComponent();
            Theming.ApplyTheme(this);
            scheduleTime.CustomFormat = DateTimeFormatInfo.CurrentInfo.ShortTimePattern;

            //Set a default task type
            typeManual.Checked = true;
            scheduleDaily.Checked = true;
        }

        /// <summary>
        /// Sets or retrieves the task object to be edited or being edited.
        /// </summary>
        public Task Task
        {
            get { UpdateTaskFromUI(); return task; }
            set { task = value; UpdateUIFromTask(); }
        }

        /// <summary>
        /// Updates the local task object from the UI elements.
        /// </summary>
        private void UpdateTaskFromUI()
        {
            //Set the name of the task
            task.Name = name.Text;

            //And the schedule, if selected.
            if (typeManual.Checked)
            {
                task.Schedule = Schedule.RunManually;
            }
            else if (typeImmediate.Checked)
            {
                task.Schedule = Schedule.RunNow;
            }
            else if (typeRestart.Checked)
            {
                task.Schedule = Schedule.RunOnRestart;
            }
            else if (typeRecurring.Checked)
            {
                RecurringSchedule schedule = new RecurringSchedule();
                schedule.ExecutionTime = new DateTime(1, 1, 1, scheduleTime.Value.Hour,
                    scheduleTime.Value.Minute, scheduleTime.Value.Second);

                if (scheduleDaily.Checked)
                {
                    if (scheduleDailyByDay.Checked)
                    {
                        schedule.ScheduleType = RecurringScheduleUnit.Daily;
                        schedule.Frequency = (int)scheduleDailyByDayFreq.Value;
                    }
                    else
                    {
                        schedule.ScheduleType = RecurringScheduleUnit.Weekdays;
                    }
                }
                else if (scheduleWeekly.Checked)
                {
                    schedule.ScheduleType = RecurringScheduleUnit.Weekly;
                    schedule.Frequency = (int)scheduleWeeklyFreq.Value;
                    DaysOfWeek weeklySchedule = 0;
                    if (scheduleWeeklyMonday.Checked)
                        weeklySchedule |= DaysOfWeek.Monday;
                    if (scheduleWeeklyTuesday.Checked)
                        weeklySchedule |= DaysOfWeek.Tuesday;
                    if (scheduleWeeklyWednesday.Checked)
                        weeklySchedule |= DaysOfWeek.Wednesday;
                    if (scheduleWeeklyThursday.Checked)
                        weeklySchedule |= DaysOfWeek.Thursday;
                    if (scheduleWeeklyFriday.Checked)
                        weeklySchedule |= DaysOfWeek.Friday;
                    if (scheduleWeeklySaturday.Checked)
                        weeklySchedule |= DaysOfWeek.Saturday;
                    if (scheduleWeeklySunday.Checked)
                        weeklySchedule |= DaysOfWeek.Sunday;
                    schedule.WeeklySchedule = weeklySchedule;
                }
                else if (scheduleMonthly.Checked)
                {
                    schedule.ScheduleType = RecurringScheduleUnit.Monthly;
                    schedule.Frequency = (int)scheduleMonthlyFreq.Value;
                    schedule.MonthlySchedule = (int)scheduleMonthlyDayNumber.Value;
                }
                else
                    throw new ArgumentException("No such scheduling method.");

                task.Schedule = schedule;
            }
        }

        /// <summary>
        /// Updates the UI elements to reflect the data in the Task object.
        /// </summary>
        private void UpdateUIFromTask()
        {
            //Set the name of the task
            name.Text = task.Name;

            //And the schedule, if selected.
            if (task.Schedule == Schedule.RunManually)
            {
                typeManual.Checked = true;
            }
            else if (task.Schedule == Schedule.RunNow)
            {
                typeImmediate.Checked = true;
            }
            else if (task.Schedule == Schedule.RunOnRestart)
            {
                typeRestart.Checked = true;
            }
            else
            {
                typeRecurring.Checked = true;
                RecurringSchedule schedule = (RecurringSchedule)task.Schedule;
                scheduleTime.Value = scheduleTime.MinDate.Add(schedule.ExecutionTime.TimeOfDay);

                switch (schedule.ScheduleType)
                {
                    case RecurringScheduleUnit.Daily:
                        scheduleDaily.Checked = true;
                        scheduleDailyByDay.Checked = true;
                        scheduleDailyByDayFreq.Value = schedule.Frequency;
                        break;
                    case RecurringScheduleUnit.Weekdays:
                        scheduleDaily.Checked = true;
                        scheduleDailyByWeekday.Checked = true;
                        break;
                    case RecurringScheduleUnit.Weekly:
                        scheduleWeeklyFreq.Value = schedule.Frequency;
                        scheduleWeekly.Checked = true;
                        scheduleWeeklyMonday.Checked =
                            (schedule.WeeklySchedule & DaysOfWeek.Monday) != 0;
                        scheduleWeeklyTuesday.Checked =
                            (schedule.WeeklySchedule & DaysOfWeek.Tuesday) != 0;
                        scheduleWeeklyWednesday.Checked =
                            (schedule.WeeklySchedule & DaysOfWeek.Wednesday) != 0;
                        scheduleWeeklyThursday.Checked =
                            (schedule.WeeklySchedule & DaysOfWeek.Thursday) != 0;
                        scheduleWeeklyFriday.Checked =
                            (schedule.WeeklySchedule & DaysOfWeek.Friday) != 0;
                        scheduleWeeklySaturday.Checked =
                            (schedule.WeeklySchedule & DaysOfWeek.Saturday) != 0;
                        scheduleWeeklySunday.Checked =
                            (schedule.WeeklySchedule & DaysOfWeek.Sunday) != 0;
                        break;
                    case RecurringScheduleUnit.Monthly:
                        scheduleMonthly.Checked = true;
                        scheduleMonthlyFreq.Value = schedule.Frequency;
                        scheduleMonthlyDayNumber.Value = schedule.MonthlySchedule;
                        break;
                    default:
                        throw new ArgumentException("Unknown schedule type.");
                }
            }
        }

        /// <summary>
        /// Triggered when the list view needs to display an item.
        /// </summary>
        /// <param name="sender">The list view.</param>
        /// <param name="e">Event argument.</param>
        private void data_RetrieveVirtualItem(object sender, RetrieveVirtualItemEventArgs e)
        {
            ErasureTarget target = task.Targets[e.ItemIndex];
            FileInfo info = new FileInfo(target.UIText);
            e.Item = new ListViewItem(info.GetCompactPath(data.Columns[0].Width, data.Font));
            e.Item.ToolTipText = target.UIText;

            e.Item.SubItems.Add(target.Method == ErasureMethodRegistrar.Default ?
                S._("(default)") : target.Method.Name);
        }

        /// <summary>
        /// Triggered when the user clicks on the Add Data button.
        /// </summary>
        /// <param name="sender">The button.</param>
        /// <param name="e">Event argument.</param>
        private void dataAdd_Click(object sender, EventArgs e)
        {
            using (TaskDataSelectionForm form = new TaskDataSelectionForm())
            {
                if (form.ShowDialog() == DialogResult.OK)
                {
                    ErasureTarget target = form.Target;
                    task.Targets.Add(target);
                    errorProvider.Clear();

                    ++data.VirtualListSize;
                }
            }
        }

        /// <summary>
        /// Generated when the user double-clicks an item in the list-view.
        /// </summary>
        /// <param name="sender">The list-view which generated this event.</param>
        /// <param name="e">Event argument.</param>
        private void data_ItemActivate(object sender, EventArgs e)
        {
            using (TaskDataSelectionForm form = new TaskDataSelectionForm())
            {
                form.Target = task.Targets[data.SelectedIndices[0]];

                if (form.ShowDialog() == DialogResult.OK)
                {
                    ErasureTarget target = form.Target;
                    task.Targets.RemoveAt(data.SelectedIndices[0]);
                    task.Targets.Insert(data.SelectedIndices[0], target);
                }
            }
        }

        private void data_DragEnter(object sender, DragEventArgs e)
        {
            //Get the list of files.
            bool recycleBin = false;
            List<string> paths = new List<string>(TaskDragDropHelper.GetFiles(e, out recycleBin));

            for (int i = 0; i < paths.Count; ++i)
            {
                //Just use the file name/directory name.
                paths[i] = Path.GetFileName(paths[i]);
            }

            //Add the recycle bin if it was dropped.
            if (recycleBin)
                paths.Add(S._("Recycle Bin"));

            string description = null;
            if (paths.Count == 0)
            {
                e.Effect = DragDropEffects.None;
                description = S._("Cannot add the selected items");
            }
            else
            {
                e.Effect = DragDropEffects.Copy;
                description = S._("Add {0}");
            }

            TaskDragDropHelper.OnDragEnter(this, e, description, paths);
        }

        private void data_DragLeave(object sender, EventArgs e)
        {
            DropTargetHelper.DragLeave((Control)sender);
        }

        private void data_DragOver(object sender, DragEventArgs e)
        {
            DropTargetHelper.DragOver(new Point(e.X, e.Y), e.Effect);
        }

        private void data_DragDrop(object sender, DragEventArgs e)
        {
            TaskDragDropHelper.OnDrop(e);
            if (e.Effect == DragDropEffects.None)
                return;

            //Determine our action.
            bool recycleBin = false;
            List<string> paths = new List<string>(TaskDragDropHelper.GetFiles(e, out recycleBin));

            //Add the targets
            foreach (ErasureTarget target in TaskDragDropHelper.GetTargets(paths, recycleBin))
            {
                task.Targets.Add(target);
                ++data.VirtualListSize;

                errorProvider.Clear();
            }
        }

        /// <summary>
        /// Generated when the user right-clicks on the data selection list-view.
        /// </summary>
        /// <param name="sender">The menu being opened.</param>
        /// <param name="e">Event argument.</param>
        private void dataContextMenuStrip_Opening(object sender, CancelEventArgs e)
        {
            if (data.SelectedIndices.Count == 0)
            {
                e.Cancel = true;
                return;
            }
        }

        /// <summary>
        /// Generated when the user selects the menu itm to remove the selected
        /// data from the list of data to erase.
        /// </summary>
        /// <param name="sender">The object triggering the event.</param>
        /// <param name="e">Event argument.</param>
        private void deleteDataToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (data.SelectedIndices.Count == 0)
                return;

            //Get the list of selected indices; sort them in decreasing order so that we
            //can iterate and remove items without changing indices
            SortedSet<int> indices = new SortedSet<int>();
            foreach (int index in data.SelectedIndices)
                indices.Add(index);

            //Remove the items from the list view
            data.SelectedIndices.Clear();
            data.VirtualListSize -= indices.Count;

            //Then finally remove the items from the task list
            foreach (int index in indices.Reverse())
                task.Targets.RemoveAt(index);
        }

        /// <summary>
        /// Generated when the task schedule type changes.
        /// </summary>
        /// <param name="sender">The object triggering the event.</param>
        /// <param name="e">Event argument.</param>
        private void taskType_CheckedChanged(object sender, EventArgs e)
        {
            scheduleTimeLbl.Enabled = scheduleTime.Enabled = schedulePattern.Enabled =
                scheduleDaily.Enabled = scheduleWeekly.Enabled =
                scheduleMonthly.Enabled = typeRecurring.Checked;
            nonRecurringPanel.Visible = !typeRecurring.Checked;
            
            scheduleSpan_CheckedChanged(sender, e);
        }

        /// <summary>
        /// Generated when any of the schedule spans have been clicked.
        /// </summary>
        /// <param name="sender">The radio button triggering the event.</param>
        /// <param name="e">Event argument.</param>
        private void scheduleSpan_Clicked(object sender, EventArgs e)
        {
            //Check the selected radio button
            scheduleDaily.Checked = sender == scheduleDaily;
            scheduleWeekly.Checked = sender == scheduleWeekly;
            scheduleMonthly.Checked = sender == scheduleMonthly;

            //Then trigger the checked changed event.
            scheduleSpan_CheckedChanged(sender, e);
        }

        /// <summary>
        /// Generated when the scheduling frequency is changed.
        /// </summary>
        /// <param name="sender">The object triggering the event.</param>
        /// <param name="e">Event argument.</param>
        private void scheduleSpan_CheckedChanged(object sender, EventArgs e)
        {
            RadioButton[] group = new RadioButton[] {
                scheduleDaily, scheduleWeekly, scheduleMonthly
            };
            if (group.Contains(sender) && ((RadioButton)sender).Checked)
            {
                foreach (RadioButton button in group)
                    if (button != sender)
                        button.Checked = false;
            }

            scheduleDailyByDay.Enabled = scheduleDailyByDayLbl.Enabled =
                scheduleDailyByWeekday.Enabled = scheduleDaily.Checked &&
                typeRecurring.Checked;
            scheduleWeeklyLbl.Enabled = scheduleWeeklyFreq.Enabled =
                scheduleWeeklyFreqLbl.Enabled = scheduleWeeklyMonday.Enabled =
                scheduleWeeklyTuesday.Enabled = scheduleWeeklyWednesday.Enabled =
                scheduleWeeklyThursday.Enabled = scheduleWeeklyFriday.Enabled =
                scheduleWeeklySaturday.Enabled = scheduleWeeklySunday.Enabled =
                scheduleWeekly.Checked && typeRecurring.Checked;
            scheduleMonthlyLbl.Enabled = scheduleMonthlyDayNumber.Enabled =
                scheduleMonthlyEveryLbl.Enabled = scheduleMonthlyFreq.Enabled =
                scheduleMonthlyMonthLbl.Enabled = scheduleMonthly.Checked &&
                typeRecurring.Checked;

            scheduleDailySpan_CheckedChanged(sender, e);
        }

        /// <summary>
        /// Generated when any of the daily frequency radio buttons are clicked.
        /// </summary>
        /// <param name="sender">The radio button which triggers the event.</param>
        /// <param name="e">Event argument.</param>
        private void scheduleDailySpan_Clicked(object sender, EventArgs e)
        {
            scheduleDailyByDay.CheckedChanged -= scheduleDailySpan_CheckedChanged;
            scheduleDailyByWeekday.CheckedChanged -= scheduleDailySpan_CheckedChanged;

            scheduleDailyByDay.Checked = sender == scheduleDailyByDay;
            scheduleDailyByWeekday.Checked = sender == scheduleDailyByWeekday;

            scheduleDailyByDay.CheckedChanged += scheduleDailySpan_CheckedChanged;
            scheduleDailyByWeekday.CheckedChanged += scheduleDailySpan_CheckedChanged;
            
            scheduleDailySpan_CheckedChanged(sender, e);
        }

        /// <summary>
        /// Generated when the daily frequency argument is changed.
        /// </summary>
        /// <param name="sender">The object triggering the event.</param>
        /// <param name="e">Event argument.</param>
        private void scheduleDailySpan_CheckedChanged(object sender, EventArgs e)
        {
            scheduleDailyByDayLbl.Enabled = scheduleDailyByDayFreq.Enabled =
                scheduleDailyByDay.Checked && scheduleDaily.Checked && typeRecurring.Checked;
        }

        /// <summary>
        /// Generated when the dialog is closed.
        /// </summary>
        /// <param name="sender">The object triggering the event.</param>
        /// <param name="e">Event argument.</param>
        private void ok_Click(object sender, EventArgs e)
        {
            if (task.Targets.Count == 0)
            {
                errorProvider.SetIconPadding(data, -16);
                errorProvider.SetIconAlignment(data, ErrorIconAlignment.BottomRight);
                errorProvider.SetError(data, S._("The task has no data to erase."));
                container.SelectedIndex = 0;
                return;
            }
            else if (typeRecurring.Checked && scheduleWeekly.Checked)
            {
                if (!scheduleWeeklyMonday.Checked && !scheduleWeeklyTuesday.Checked &&
                    !scheduleWeeklyWednesday.Checked && !scheduleWeeklyThursday.Checked &&
                    !scheduleWeeklyFriday.Checked && !scheduleWeeklySaturday.Checked &&
                    !scheduleWeeklySunday.Checked)
                {
                    errorProvider.SetIconPadding(scheduleWeeklyDays, -16);
                    errorProvider.SetError(scheduleWeeklyDays, S._("The task needs to run " +
                        "on at least one day a week"));
                    container.SelectedIndex = 1;
                    return;
                }
            }

            errorProvider.Clear();

            //Close the dialog
            DialogResult = DialogResult.OK;
            Close();
        }

        /// <summary>
        /// The task being edited.
        /// </summary>
        private Task task = new Task();
    }
}