Creating booking overview (table) from MySQL Database - Combining arrays - php

Question

I am desperate because of my lack of programming experience.
I am working on a small WordPress plugin, a room booking system.
Now my problem is to create the daily overview.
In the database, there is a table with all bookings looking like this:
--------------------------------------------------------------
|id|user_id| starttime | endtime |room|type|
---+-------+-------------------+-------------------+----+-----
|1 | 101|2017-08-24 11:00:00|2017-08-24 12:30:00|12 | 4 |
|2 | ...
The overview / calendar / schedule for every day should be made as an HTML-Table using Bootstrap and look like the following:
Time Conference Room Meeting Room Lobby
07:00 Mr. T
08:00 Mr. T
09:00 C.J.P. Mrs. L.
10:00
11:00
12:00 Mrs. M
So the free timeslots should be empty columns.
To achieve this, I started using a function to create all starttimes:
$times_array = array();
$timing_interval = get_option('timing');
for ($hours = get_option('starttime'); $hours < get_option('endtime'); $hours++) {
for ($m = 0; $m < 60; $m += $timing_interval) {
$starttime_html = sprintf('%02u:%02u', $hours, $m);
$times_array[$starttime_html]='';
}
}
Afterwards I created an array containing the already saved bookings:
$booking_array = array();
$statement = $wpdb->get_results( $wpdb->prepare("SELECT {$mpbs_prefix}_bookings.id, user_id, wp_users.user_nicename AS username_nice, starttime, facility_id, roomname, equipment_1, {$mpbs_prefix}_equipment.name AS eq_1_name, equipment_2 FROM {$mpbs_prefix}_bookings, {$mpbs_prefix}_facilities, {$mpbs_prefix}_equipment, wp_users WHERE user_id = wp_users.ID AND equipment_1 = {$mpbs_prefix}_equipment.id AND {$mpbs_prefix}_facilities.id = {$mpbs_prefix}_bookings.facility_id AND starttime >= '2017-08-22 00:00:00'"),ARRAY_A);
$bookingrow = 0;
foreach($statement as $actualbookings) {
$starttime_currentday = explode(" ",$statement[$bookingrow]['starttime']);
$starttime_curr_hm = substr($starttime_currentday[1],0,5);
$booking_array[$bookingrow] =
array('starttime_of_booking'=>$starttime_curr_hm, 'facliId'=>$statement[$bookingrow]['facility_id'],'userid'=> $statement[$bookingrow]['username_nice'], 'horse_1_name' => $statement[$bookingrow]['horse_1_name']);
$bookingrow++;
}
As there are a lot of rooms (facilities) in different categories, I chose a tabbed navigation from Bootstrap.
Therefore I created a function to "draw" the table using information from three directions:
The column heads directly from the database
the starting times created in PHP (see above)
the already booked times and facilities saved in my $booking_array
As the HTML-table is created row wise, I thought it would be a good approach to check if the starttime is also available in the $booking_array and if yes to add a cell containing the username.
So far that worked, but now I wanted to have all free slots as empty cells. So I tried a lot but always end up in a table with hundreds of empty rows.
In my last approach I used a function I found here, to check if the starttime is not in my multidimensional associative array ($booking_array) and to add the empty cell:
$drawTable = function($funcFormCat, $funcFacId) use ($mpbs_overview_category_query, $times_array, $booking_array) {
echo "<table class='table table-hover'>";
echo "<thead>";
//echo "<th class='text-center'></th>";
foreach ($mpbs_overview_category_query as $overview_formcategories) {
if ($overview_formcategories->formcategory == $funcFormCat && $overview_formcategories->facility_id == $funcFacId) {
echo "<th class='text-center' id='$overview_formcategories->facility_id'>" . $overview_formcategories->facility ."</th>";
}
}
echo "</thead>";
foreach ($times_array as $timeskey => $timesvalue) {
echo "<tr>";
// echo "<td class='text-center'>.</td>";
for ($booking_array_id = 0; $booking_array_id < count($booking_array); $booking_array_id++ ) {
if ($booking_array[$booking_array_id]['starttime_of_booking'] == $timeskey && $booking_array[$booking_array_id]['facliId'] == $funcFacId ) {
echo "<td class='text-center'>" . $booking_array[$booking_array_id]['username'] . "</td>";
echo "</tr>";
}
elseif (in_array_r($timeskey, $booking_array)==false) {
echo "<td class='text-center'>**</td>";
echo "</tr>";
}
}
}
My arrays do contain the following format:
$times_array
Array ( [07:00] => [07:30] => [08:00] => [08:30] => [09:00] => [09:30] => [10:00] => [10:30] => [11:00] => [11:30] => [12:00] => [12:30] => [13:00] => [13:30] => [14:00] => [14:30] => [15:00] => [15:30] => [16:00] => [16:30] => [17:00] => [17:30] => [18:00] => [18:30] => [19:00] => [19:30] => [20:00] => [20:30] => [21:00] => [21:30] => )
$booking_array
Array ( [0] => Array ( [starttime_of_booking] => 08:00 [facliId] => 6 [userid] => Mr T [equipment] => Beamer ) [1] => Array ( [starttime_of_booking] => 14:00 [facliId] => 4 [userid] => Mrs. L [equipment] => Flipchart ) [2] => Array ( [starttime_of_booking] => 14:00 [facliId] => 9 [userid] => Mrs. M [equipment] => TV-Set ) [3] => Array ( [starttime_of_booking] => 13:00 [facliId] => 8 [userid] => C.J.P. [equipment] => Stuff )
As I am trying around for hours now and do not get a correct overview, I would be very happy for any hints, tips or suggestions!
Thanks in advance.
Regards
Lars
To clarify, what I want to achieve, I add some more information here:
What I want is to create a HTML-Table, which is populated from the 3 sources:
At first he table's heading should be made by a SQL-query to get the room names and their ids. (<thead><th id='facility_id'>room1</th><th id='facility_id'>room2</th id='facility_id'>...</thead>
Afterwards in the 1st data row in the 1st column the 1st starttime coming from $times_array should be printed. ("<td>".$timeskey."</td>").
All remaining cells should also be formatted as HTML-Cells.
Now comes the tricky part (for me), as I want to populate those cells, where already a booking was made.
For example the conference room is booked from 07:00 to 09:00 by Mr.T.
To achieve this without Ajax, I created the array $booking_array with the data from my bookings database table.
Now I am stuck on writing a function, which draws my HTML-Table with all necessary information at the right place.
A <tr> tag is printed to open a new row. In the next step a cell with the starttime is added. And now I want to iterate through my $bookings_array for any booking starting at this time and printing the username to the corresponding column.
As I did not get that to work, in one table, I tried to achieve it by creating a single table for each room containing the starttimes and the column with the booking data / free slots. But the table gets hundreds of rows.