audittrail.js
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audittrail.js
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	/**
	* Kolab groupware audit trail utilities
	*
	* @author Thomas Bruederli <bruederli@kolabsys.com>
	*
	* @licstart The following is the entire license notice for the
	* JavaScript code in this file.
	*
	* Copyright (C) 2015, Kolab Systems AG <contact@kolabsys.com>
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Affero 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 Affero General Public License for more details.
	*
	* You should have received a copy of the GNU Affero General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*
	* @licend The above is the entire license notice
	* for the JavaScript code in this file.
	*/

	var libkolab_audittrail = {}

	libkolab_audittrail.quote_html = function(str)
	{
	return String(str).replace(/</g, '<').replace(/>/g, '>').replace(/"/g, '"');
	};


	// show object changelog in a dialog
	libkolab_audittrail.object_history_dialog = function(p)
	{
	// render dialog
	var $dialog = $(p.container);

	// close show dialog first
	if ($dialog.is(':ui-dialog'))
	$dialog.dialog('close');

	// hide and reset changelog table
	$dialog.find('div.notfound-message').remove();
	$dialog.find('.changelog-table').show().children('tbody')
	.html('<tr><td colspan="4"><span class="loading">' + rcmail.gettext('loading') + '</span></td></tr>');

	// open jquery UI dialog
	$dialog.dialog({
	modal: false,
	resizable: true,
	closeOnEscape: true,
	title: p.title,
	open: function() {
	$dialog.attr('aria-hidden', 'false');
	},
	close: function() {
	$dialog.dialog('destroy').attr('aria-hidden', 'true').hide();
	},
	buttons: [
	{
	text: rcmail.gettext('close'),
	click: function() { $dialog.dialog('close'); },
	autofocus: true
	}
	],
	minWidth: 450,
	width: 650,
	height: 350,
	minHeight: 200
	})
	.show().children('.compare-button').hide();

	// initialize event handlers for history dialog UI elements
	if (!$dialog.data('initialized')) {
	// compare button
	$dialog.find('.compare-button input').click(function(e) {
	var rev1 = $dialog.find('.changelog-table input.diff-rev1:checked').val(),
	rev2 = $dialog.find('.changelog-table input.diff-rev2:checked').val();

	if (rev1 && rev2 && rev1 != rev2) {
	// swap revisions if the user got it wrong
	if (rev1 > rev2) {
	var tmp = rev2;
	rev2 = rev1;
	rev1 = tmp;
	}

	if (p.comparefunc) {
	p.comparefunc(rev1, rev2);
	}
	}
	else {
	alert('Invalid selection!')
	}

	if (!rcube_event.is_keyboard(e) && this.blur) {
	this.blur();
	}
	return false;
	});

	// delegate handlers for list actions
	$dialog.find('.changelog-table tbody').on('click', 'td.actions a', function(e) {
	var link = $(this),
	action = link.hasClass('restore') ? 'restore' : 'show',
	event = $('#eventhistory').data('event'),
	rev = link.attr('data-rev');

	// ignore clicks on first row (current revision)
	if (link.closest('tr').hasClass('first')) {
	return false;
	}

	// let the user confirm the restore action
	if (action == 'restore' && !confirm(rcmail.gettext('revisionrestoreconfirm', p.module).replace('$rev', rev))) {
	return false;
	}

	if (p.listfunc) {
	p.listfunc(action, rev);
	}

	if (!rcube_event.is_keyboard(e) && this.blur) {
	this.blur();
	}
	return false;
	})
	.on('click', 'input.diff-rev1', function(e) {
	if (!this.checked) return true;

	var rev1 = this.value, selection_valid = false;
	$dialog.find('.changelog-table input.diff-rev2').each(function(i, elem) {
	$(elem).prop('disabled', elem.value <= rev1);
	if (elem.checked && elem.value > rev1) {
	selection_valid = true;
	}
	});
	if (!selection_valid) {
	$dialog.find('.changelog-table input.diff-rev2:not([disabled])').last().prop('checked', true);
	}
	});

	$dialog.addClass('changelog-dialog').data('initialized', true);
	}

	return $dialog;
	};

	// callback from server with changelog data
	libkolab_audittrail.render_changelog = function(data, object, folder)
	{
	var Q = libkolab_audittrail.quote_html;

	var $dialog = $('.changelog-dialog')
	if (data === false \|\| !data.length) {
	return false;
	}

	var i, change, accessible, op_append,
	first = data.length - 1, last = 0,
	is_writeable = !!folder.editable,
	op_labels = {
	RECEIVE: 'actionreceive',
	APPEND: 'actionappend',
	MOVE: 'actionmove',
	DELETE: 'actiondelete',
	READ: 'actionread',
	FLAGSET: 'actionflagset',
	FLAGCLEAR: 'actionflagclear'
	},
	actions = '<a href="#show" class="iconbutton preview" title="'+ rcmail.gettext('showrevision','libkolab') +'" data-rev="{rev}" /> ' +
	(is_writeable ? '<a href="#restore" class="iconbutton restore" title="'+ rcmail.gettext('restore','libkolab') + '" data-rev="{rev}" />' : ''),
	tbody = $dialog.find('.changelog-table tbody').html('');

	for (i=first; i >= 0; i--) {
	change = data[i];
	accessible = change.date && change.user;

	if (change.op == 'MOVE' && change.mailbox) {
	op_append = ' ⇢ ' + change.mailbox;
	}
	else if ((change.op == 'FLAGSET' \|\| change.op == 'FLAGCLEAR') && change.flags) {
	op_append = ': ' + change.flags;
	}
	else {
	op_append = '';
	}

	$('<tr class="' + (i == first ? 'first' : (i == last ? 'last' : '')) + (accessible ? '' : 'undisclosed') + '">')
	.append('<td class="diff">' + (accessible && change.op != 'DELETE' ?
	'<input type="radio" name="rev1" class="diff-rev1" value="' + change.rev + '" title="" '+ (i == last ? 'checked="checked"' : '') +' /> '+
	'<input type="radio" name="rev2" class="diff-rev2" value="' + change.rev + '" title="" '+ (i == first ? 'checked="checked"' : '') +' /></td>'
	: ''))
	.append('<td class="revision">' + Q(i+1) + '</td>')
	.append('<td class="date">' + Q(change.date \|\| '') + '</td>')
	.append('<td class="user">' + Q(change.user \|\| 'undisclosed') + '</td>')
	.append('<td class="operation" title="' + op_append + '">' + Q(rcmail.gettext(op_labels[change.op] \|\| '', 'libkolab') + op_append) + '</td>')
	.append('<td class="actions">' + (accessible && change.op != 'DELETE' ? actions.replace(/\{rev\}/g, change.rev) : '') + '</td>')
	.appendTo(tbody);
	}

	if (first > 0) {
	$dialog.find('.compare-button').fadeIn(200);
	$dialog.find('.changelog-table tr.last input.diff-rev1').click();
	}

	// set dialog size according to content
	libkolab_audittrail.dialog_resize($dialog.get(0), $dialog.height() + 15, 600);

	return $dialog;
	};

	// resize and reposition (center) the dialog window
	libkolab_audittrail.dialog_resize = function(id, height, width)
	{
	var win = $(window), w = win.width(), h = win.height();
	$(id).dialog('option', { height: Math.min(h-20, height+130), width: Math.min(w-20, width+50) });
	};


	// register handlers for mail message history
	window.rcmail && rcmail.addEventListener('init', function(e) {
	var loading_lock;

	if (rcmail.env.task == 'mail') {
	rcmail.register_command('kolab-mail-history', function() {
	var dialog, uid = rcmail.get_single_uid(), rec = { uid: uid, mbox: rcmail.get_message_mailbox(uid) };
	if (!uid \|\| !window.libkolab_audittrail) {
	return false;
	}

	// render dialog
	$dialog = libkolab_audittrail.object_history_dialog({
	module: 'libkolab',
	container: '#mailmessagehistory',
	title: rcmail.gettext('objectchangelog','libkolab')
	});

	$dialog.data('rec', rec);

	// fetch changelog data
	loading_lock = rcmail.set_busy(true, 'loading', loading_lock);
	rcmail.http_post('plugin.message-changelog', { _uid: rec.uid, _mbox: rec.mbox }, loading_lock);

	}, rcmail.env.action == 'show');

	rcmail.addEventListener('plugin.message_render_changelog', function(data) {
	var $dialog = $('#mailmessagehistory'),
	rec = $dialog.data('rec');

	if (data === false \|\| !data.length \|\| !rec) {
	// display 'unavailable' message
	$('<div class="notfound-message dialog-message warning">' + rcmail.gettext('objectchangelognotavailable','libkolab') + '</div>')
	.insertBefore($dialog.find('.changelog-table').hide());
	return;
	}

	data.module = 'libkolab';
	libkolab_audittrail.render_changelog(data, rec, {});
	});

	rcmail.env.message_commands.push('kolab-mail-history');
	}
	});

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