Calendar Enhancements - Automatic Calendar Reminders

What does it do?
This hack allows your members to receive automatic reminders for all upcoming events in one or more calendars of their choice without having to request individual reminders for each event. In effect, this operates like a subscription to a calendar.

How does it work?
When opening a calendar, the user will be presented with an option just under the calendar title to subscribe or unsubscribe to the calendar. Members can request automatic reminders for all events on the calendar for one, two or three days in advance. Once per day, a digest of all upcoming events will be sent to the user advising them of upcoming events in the time frame they chose. (see attached screenshot)

Users can also unsubscribe from a calendar by going to the UserCP and Event Reminders section (see attached screenshot)

Example Email (uses the event reminder email template):

Dear Farcaster,

The following events are scheduled to begin soon at YOUR FORUM NAME.

Upcoming events:
************
Test Event 1 (In less than 23 hour(s))
http://YOUR_URL_HERE/calendar.php?do=getinfo&e=1
In Calendar: Calendar #1 Name
************
Test Event 3 (In less than 47 hour(s))
http://YOUR_URL_HERE/calendar.php?do=getinfo&e=3
In Calendar: Calendar #2 Name
************
Test Event 2 (In less than 47 hour(s))
http://YOUR_URL_HERE/calendar.php?do=getinfo&e=2
In Calendar: Calendar #3 Name


All the best,
YOUR FORUM NAME

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Unsubscription information:

To unsubscribe from this email, please visit this page and delete any future reminders:
http://YOUR_URL_HERE/calendar.php?do=viewreminder

Upgrading from previous version:
You do not need to uninstall the previous version.

To upgrade from previous version to 1.0.3:
1. Remove the Calendar Subscription cron job if it exists.
2. Delete the file includes/cron/calendar_reminder.php
3. Make the changes to the reminder.php file as specified in the instructions below.


Installation Instructions
- 1 XML upload
- 1 template modification
- 1 file edit

1. Use the Product Manager to import the product file product-rah_calendar_autoremind_1_0_3.xml

3. Use the Style Manager to add the following code to the bottom of your CALENDAR_REMINDER template:

<!-- calendar subscriptions table -->
<br />
<form action="calendar.php?do=dosubscriptions" method="post" name="unsubscribe">
<input type="hidden" name="s" value="$session[sessionhash]" />
<input type="hidden" name="do" value="dosubscriptions" />


<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" align="center">
<tr>
    <td class="tcat" colspan="3">
        Calendar Subscriptions
    </td>
</tr>
<if condition="$show['havesubscriptions']">
<tr>
    <td class="thead">
        Calendar
    </td>
    <td class="thead" nowrap="nowrap"><a href="$sorturl&order=asc&sort=reminder">$vbphrase[reminder]</a> $sortarrow[reminder]</td>
    <td class="thead" align="center"><input name="allbox" type="checkbox" value="Check All" title="$vbphrase[check_uncheck_all]" onclick="checkall(this.form);" /></td>
</tr>
$subscriptionbits
<tr>
    <td class="tfoot" colspan="5" align="$stylevar[right]"><div class="smallfont">
        
        $vbphrase[selected_events]
        <select name="what">
            <optgroup label="$vbphrase[delete_reminders]">
                <option value="delete">$vbphrase[delete]</option>
            </optgroup>                            
        </select>$gobutton
        
    </div></td>
</tr>
<else />
    <tr>
        <td class="alt1" align="center" colspan="5">
            <br />
            You have no calendar subscriptions.
            <br />
            <br />
        </td>
    </tr>
</if>
</table>

</form>

4. Open a copy of the includes/cron/reminder.php file and find the following:

PHP Code:

AND event.visible = 1 
"); 


Replace with the following:

PHP Code:

AND event.visible = 1 
".$calendar_subscription); 


Above that, near the top of the reminder.php file, find:

PHP Code:

$eventlist = array(); 
$eventcache = array(); 
$userinfo = array(); 


Below that add:

PHP Code:

$dsq = $vbulletin->db->query_read(" 
        SELECT     * 
        FROM     " . TABLE_PREFIX . "datastore 
        WHERE     title = 'lastautoremind' 
"); 
$ds = $vbulletin->db->fetch_array($dsq); 

$daynumber = round($timenow/86400); 

if ($ds['data'] < $daynumber) { 
    build_datastore('lastautoremind',$daynumber); 

    $calendar_subscription = "UNION ALL 
        SELECT event.eventid, event.title, recurring, recuroption, dateline_from, dateline_to, IF (dateline_to = 0, 1, 0) AS singleday, 
            dateline_from AS dateline_from_user, dateline_to AS dateline_to_user, utc, dst, event.calendarid, 
            subscribecalendar.userid, 0 as lastreminder, 0 as subscribeeventid, subscribecalendar.reminder, 
            user.email, user.languageid, user.usergroupid, user.username, user.timezoneoffset, IF(user.options & 128, 1, 0) AS dstonoff, 
            calendar.title AS calendar_title 
        FROM " . TABLE_PREFIX . "event AS event 
        INNER JOIN " . TABLE_PREFIX . "subscribecalendar AS subscribecalendar ON (subscribecalendar.calendarid = event.calendarid) 
        INNER JOIN " . TABLE_PREFIX . "user AS user ON (user.userid = subscribecalendar.userid) 
        LEFT JOIN " . TABLE_PREFIX . "calendar AS calendar ON (event.calendarid = calendar.calendarid) 
        WHERE ((dateline_to >= $beginday AND dateline_from < $endday) OR (dateline_to = 0 AND dateline_from >= $beginday AND dateline_from <= $endday )) 
            AND event.visible = 1"; 
} 


(Note: If a user chooses to receive a reminder 3 days in advance, they will receive a daily reminder on each day from the 3 days out to 1 day out)

And, that's it. I hope you enjoy. Please click "install" if you use this hack.

I have not tested this with 3.6.1 yet, but there shouldn't be any reason it won't work with it.

Revision History
Version 1.0.0 - Initial Release
Version 1.0.1 - Fixed caching bug that caused calendar templates to become uncached when the user clicked the subscribe or unsubscribe link.
Version 1.0.2 - Fixed problem were reminders were sent for 3 days in advance regardless of the setting a member chose.
Version 1.0.3 - Removed calendar_reminder.php and merged email code with existing reminder.php.

A parallel version for 3.5.x forums is now available here.

[Farcaster]

Limitations:

Calendar Reminders are sent once per day at or after midnight based on the system time. The time is not configurable. This will be resolved in a future revision.

[Lionel]

Please how to fix this problem? This hack uncached all calendar templates

[Barakat]

thanks installed

[Farcaster]

Originally Posted by Lionel

Please how to fix this problem? This hack uncached all calendar templates

I'm working on this now. It looks like the caching problem only happens when the user is clicking on the subscribe or unsubscribe link. Other times, the cache is not effected. To see what I mean, if you have debug on, subscribe to a calendar and then browse back to the main page, and then back to the calendar again.

[Lionel]

In addition to that, in normal calendar view (when you first access it), only this template 'calendar_subscribe_bit ' is not cached.

[bada_bing]

will this work with vb calander events hack?

Also will it work with the 3.5.3 & 3.5.4 flavors of vb?

[Farcaster]

The caching problem is now resolved. See the upgrade instructions. Additionally, I added a plugin to cache the new subscription templates.

[Farcaster]

Originally Posted by bada_bing

will this work with vb calander events hack?

It works with both Event Attendance 2.0 and with the vB Event Forums. However, the subscription link only shows up on the calendar, so users will not see a subscribe link when viewing an event in the Event Forums.

Originally Posted by bada_bing

Also will it work with the 3.5.3 & 3.5.4 flavors of vb?

No, but I am working on a seperate version that will work with 3.5.x.

[Snake]

Thanks, will check this out soon...