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                    GNU GENERAL PUBLIC LICENSE

                       Version 2, June 1991

 Copyright (C) 1989, 1991 Free Software Foundation, Inc.,

 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 Everyone is permitted to copy and distribute verbatim copies

 of this license document, but changing it is not allowed.

                            Preamble

  The licenses for most software are designed to take away your

freedom to share and change it.  By contrast, the GNU General Public

License is intended to guarantee your freedom to share and change free

software--to make sure the software is free for all its users.  This

General Public License applies to most of the Free Software

Foundation's software and to any other program whose authors commit to

using it.  (Some other Free Software Foundation software is covered by

the GNU Lesser General Public License instead.)  You can apply it to

your programs, too.

  When we speak of free software, we are referring to freedom, not

price.  Our General Public Licenses are designed to make sure that you

have the freedom to distribute copies of free software (and charge for

this service if you wish), that you receive source code or can get it

if you want it, that you can change the software or use pieces of it

in new free programs; and that you know you can do these things.

  To protect your rights, we need to make restrictions that forbid

anyone to deny you these rights or to ask you to surrender the rights.

These restrictions translate to certain responsibilities for you if you

distribute copies of the software, or if you modify it.

  For example, if you distribute copies of such a program, whether

gratis or for a fee, you must give the recipients all the rights that

you have.  You must make sure that they, too, receive or can get the

source code.  And you must show them these terms so they know their

rights.

  We protect your rights with two steps: (1) copyright the software, and

(2) offer you this license which gives you legal permission to copy,

distribute and/or modify the software.

  Also, for each author's protection and ours, we want to make certain

that everyone understands that there is no warranty for this free

software.  If the software is modified by someone else and passed on, we

want its recipients to know that what they have is not the original, so

that any problems introduced by others will not reflect on the original

authors' reputations.

  Finally, any free program is threatened constantly by software

patents.  We wish to avoid the danger that redistributors of a free

program will individually obtain patent licenses, in effect making the

program proprietary.  To prevent this, we have made it clear that any

patent must be licensed for everyone's free use or not licensed at all.

  The precise terms and conditions for copying, distribution and

modification follow.

                    GNU GENERAL PUBLIC LICENSE

   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. This License applies to any program or other work which contains

a notice placed by the copyright holder saying it may be distributed

under the terms of this General Public License.  The "Program", below,

refers to any such program or work, and a "work based on the Program"

means either the Program or any derivative work under copyright law:

that is to say, a work containing the Program or a portion of it,

either verbatim or with modifications and/or translated into another

language.  (Hereinafter, translation is included without limitation in

the term "modification".)  Each licensee is addressed as "you".

Activities other than copying, distribution and modification are not

covered by this License; they are outside its scope.  The act of

running the Program is not restricted, and the output from the Program

is covered only if its contents constitute a work based on the

Program (independent of having been made by running the Program).

Whether that is true depends on what the Program does.

  1. You may copy and distribute verbatim copies of the Program's

source code as you receive it, in any medium, provided that you

conspicuously and appropriately publish on each copy an appropriate

copyright notice and disclaimer of warranty; keep intact all the

notices that refer to this License and to the absence of any warranty;

and give any other recipients of the Program a copy of this License

along with the Program.

You may charge a fee for the physical act of transferring a copy, and

you may at your option offer warranty protection in exchange for a fee.

  2. You may modify your copy or copies of the Program or any portion

of it, thus forming a work based on the Program, and copy and

distribute such modifications or work under the terms of Section 1

above, provided that you also meet all of these conditions:

    a) You must cause the modified files to carry prominent notices

    stating that you changed the files and the date of any change.

    b) You must cause any work that you distribute or publish, that in

    whole or in part contains or is derived from the Program or any

    part thereof, to be licensed as a whole at no charge to all third

    parties under the terms of this License.

    c) If the modified program normally reads commands interactively

    when run, you must cause it, when started running for such

    interactive use in the most ordinary way, to print or display an

    announcement including an appropriate copyright notice and a

    notice that there is no warranty (or else, saying that you provide

    a warranty) and that users may redistribute the program under

    these conditions, and telling the user how to view a copy of this

    License.  (Exception: if the Program itself is interactive but

    does not normally print such an announcement, your work based on

    the Program is not required to print an announcement.)

These requirements apply to the modified work as a whole.  If

identifiable sections of that work are not derived from the Program,

and can be reasonably considered independent and separate works in

themselves, then this License, and its terms, do not apply to those

sections when you distribute them as separate works.  But when you

distribute the same sections as part of a whole which is a work based

on the Program, the distribution of the whole must be on the terms of

this License, whose permissions for other licensees extend to the

entire whole, and thus to each and every part regardless of who wrote it.

Thus, it is not the intent of this section to claim rights or contest

your rights to work written entirely by you; rather, the intent is to

exercise the right to control the distribution of derivative or

collective works based on the Program.

In addition, mere aggregation of another work not based on the Program

with the Program (or with a work based on the Program) on a volume of

a storage or distribution medium does not bring the other work under

the scope of this License.

  3. You may copy and distribute the Program (or a work based on it,

under Section 2) in object code or executable form under the terms of

Sections 1 and 2 above provided that you also do one of the following:

    a) Accompany it with the complete corresponding machine-readable

    source code, which must be distributed under the terms of Sections

    1 and 2 above on a medium customarily used for software interchange; or,

    b) Accompany it with a written offer, valid for at least three

    years, to give any third party, for a charge no more than your

    cost of physically performing source distribution, a complete

    machine-readable copy of the corresponding source code, to be

    distributed under the terms of Sections 1 and 2 above on a medium

    customarily used for software interchange; or,

    c) Accompany it with the information you received as to the offer

    to distribute corresponding source code.  (This alternative is

    allowed only for noncommercial distribution and only if you

    received the program in object code or executable form with such

    an offer, in accord with Subsection b above.)

The source code for a work means the preferred form of the work for

making modifications to it.  For an executable work, complete source

code means all the source code for all modules it contains, plus any

associated interface definition files, plus the scripts used to

control compilation and installation of the executable.  However, as a

special exception, the source code distributed need not include

anything that is normally distributed (in either source or binary

form) with the major components (compiler, kernel, and so on) of the

operating system on which the executable runs, unless that component

itself accompanies the executable.

If distribution of executable or object code is made by offering

access to copy from a designated place, then offering equivalent

access to copy the source code from the same place counts as

distribution of the source code, even though third parties are not

compelled to copy the source along with the object code.

  4. You may not copy, modify, sublicense, or distribute the Program

except as expressly provided under this License.  Any attempt

otherwise to copy, modify, sublicense or distribute the Program is

void, and will automatically terminate your rights under this License.

However, parties who have received copies, or rights, from you under

this License will not have their licenses terminated so long as such

parties remain in full compliance.

  5. You are not required to accept this License, since you have not

signed it.  However, nothing else grants you permission to modify or

distribute the Program or its derivative works.  These actions are

prohibited by law if you do not accept this License.  Therefore, by

modifying or distributing the Program (or any work based on the

Program), you indicate your acceptance of this License to do so, and

all its terms and conditions for copying, distributing or modifying

the Program or works based on it.

  6. Each time you redistribute the Program (or any work based on the

Program), the recipient automatically receives a license from the

original licensor to copy, distribute or modify the Program subject to

these terms and conditions.  You may not impose any further

restrictions on the recipients' exercise of the rights granted herein.

You are not responsible for enforcing compliance by third parties to

this License.

  7. If, as a consequence of a court judgment or allegation of patent

infringement or for any other reason (not limited to patent issues),

conditions are imposed on you (whether by court order, agreement or

otherwise) that contradict the conditions of this License, they do not

excuse you from the conditions of this License.  If you cannot

distribute so as to satisfy simultaneously your obligations under this

License and any other pertinent obligations, then as a consequence you

may not distribute the Program at all.  For example, if a patent

license would not permit royalty-free redistribution of the Program by

all those who receive copies directly or indirectly through you, then

the only way you could satisfy both it and this License would be to

refrain entirely from distribution of the Program.

If any portion of this section is held invalid or unenforceable under

any particular circumstance, the balance of the section is intended to

apply and the section as a whole is intended to apply in other

circumstances.

It is not the purpose of this section to induce you to infringe any

patents or other property right claims or to contest validity of any

such claims; this section has the sole purpose of protecting the

integrity of the free software distribution system, which is

implemented by public license practices.  Many people have made

generous contributions to the wide range of software distributed

through that system in reliance on consistent application of that

system; it is up to the author/donor to decide if he or she is willing

to distribute software through any other system and a licensee cannot

impose that choice.

This section is intended to make thoroughly clear what is believed to

be a consequence of the rest of this License.

  8. If the distribution and/or use of the Program is restricted in

certain countries either by patents or by copyrighted interfaces, the

original copyright holder who places the Program under this License

may add an explicit geographical distribution limitation excluding

those countries, so that distribution is permitted only in or among

countries not thus excluded.  In such case, this License incorporates

the limitation as if written in the body of this License.

  9. The Free Software Foundation may publish revised and/or new versions

of the General Public License from time to time.  Such new versions will

be similar in spirit to the present version, but may differ in detail to

address new problems or concerns.

Each version is given a distinguishing version number.  If the Program

specifies a version number of this License which applies to it and "any

later version", you have the option of following the terms and conditions

either of that version or of any later version published by the Free

Software Foundation.  If the Program does not specify a version number of

this License, you may choose any version ever published by the Free Software

Foundation.

  10. If you wish to incorporate parts of the Program into other free

programs whose distribution conditions are different, write to the author

to ask for permission.  For software which is copyrighted by the Free

Software Foundation, write to the Free Software Foundation; we sometimes

make exceptions for this.  Our decision will be guided by the two goals

of preserving the free status of all derivatives of our free software and

of promoting the sharing and reuse of software generally.

                            NO WARRANTY

  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY

FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN

OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES

PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED

OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS

TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE

PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,

REPAIR OR CORRECTION.

  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING

WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR

REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,

INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING

OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED

TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY

YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER

PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE

POSSIBILITY OF SUCH DAMAGES.

                     END OF TERMS AND CONDITIONS

            How to Apply These Terms to Your New Programs

  If you develop a new program, and you want it to be of the greatest

possible use to the public, the best way to achieve this is to make it

free software which everyone can redistribute and change under these terms.

  To do so, attach the following notices to the program.  It is safest

to attach them to the start of each source file to most effectively

convey the exclusion of warranty; and each file should have at least

the "copyright" line and a pointer to where the full notice is found.

    <one line to give the program's name and a brief idea of what it does.>

    Copyright (C) <year>  <name of author>

    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 2 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, write to the Free Software Foundation, Inc.,

    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

Also add information on how to contact you by electronic and paper mail.

If the program is interactive, make it output a short notice like this

when it starts in an interactive mode:

    Gnomovision version 69, Copyright (C) year name of author

    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.

    This is free software, and you are welcome to redistribute it

    under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the appropriate

parts of the General Public License.  Of course, the commands you use may

be called something other than `show w' and `show c'; they could even be

mouse-clicks or menu items--whatever suits your program.

You should also get your employer (if you work as a programmer) or your

school, if any, to sign a "copyright disclaimer" for the program, if

necessary.  Here is a sample; alter the names:

  Yoyodyne, Inc., hereby disclaims all copyright interest in the program

  `Gnomovision' (which makes passes at compilers) written by James Hacker.

  <signature of Ty Coon>, 1 April 1989

  Ty Coon, President of Vice

This General Public License does not permit incorporating your program into

proprietary programs.  If your program is a subroutine library, you may

consider it more useful to permit linking proprietary applications with the

library.  If this is what you want to do, use the GNU Lesser General

Public License instead of this License.

-- SUMMARY --

The Makemeeting module provides a field to allow users to provide their

availability on some dates choosen by the content author.

For a full description of the module, visit the project page:

  http://drupal.org/project/makemeeting

To submit bug reports and feature suggestions, or to track changes:

  http://drupal.org/project/issues/makemeeting

-- REQUIREMENTS --

None.

-- INSTALLATION --

* Install as usual, see http://drupal.org/node/70151 for further information.

-- CONFIGURATION --

* Configure user permissions in Administration » People » Permissions:

  - Provide an answer to makemeeting forms

    You might want to give this to authenticated users as it is required to

    provide an answer to a makemeeting form.

  - Delete any makemeeting answers

    This is intended for administrators and moderators to delete answers made

    by anonymous users in case of mistakes.

-- USAGE --

* Add the field associated with its widget to any content type

-- ROADMAP --

* Better makemeeting form creation behaviors (remove a date)

* If you would like to see a new feature, please fill an issue on the drupal.org

projet page

-- CONTACT --

Current maintainers:

* Sebastien Corbin (SebCorbin) - http://drupal.org/user/412171

/**

 * Default makemeeting style

 */

/* Backend */

.makemeeting-choice-date .form-item {

  float: left;

}

/* Frontend */

.makemeeting-table {

}

.makemeeting-table .answer-editable {

  position: relative;

  display: inline;

}

.makemeeting-table .answer-editable .answer-edit {

  position: absolute;

  left: -4.7em;

  top: -0.45em;

  padding: 0.25em 0.4em;

  border-radius: 0.7em 0 0 0.7em;

  display: block;

  width: 3.3em;

}

.makemeeting-table .answer-editable .answer-edit a {

  margin: 0.3em 0 -0.3em 0;

  display: block;

  float: left;

  padding: 0 0.2em;

}

.makemeeting-table .answer-editable .answer-edit img {

  border: 0 none;

}

.makemeeting-table tr.odd .answer-editable .answer-edit {

  background: #E4E4E4;

  background: rgba(0, 0, 0, 0.105);

}

.makemeeting-table tr.even .answer-editable .answer-edit {

  background: #EFEFEF;

  background: rgba(0, 0, 0, 0.063);

}

.makemeeting-table tr .answer-editable .answer-edit {

  display: none;

}

.makemeeting-table tr.in .answer-editable .answer-edit {

  display: inline;

}

.makemeeting-table tr.editing,

.makemeeting-table tr.editing > td {

  padding: 0;

}

.makemeeting-table tr.editing table {

  margin: 0;

}

.makemeeting-table .date,

.makemeeting-table .suggestion,

.makemeeting-table .answer,

.makemeeting-table .total-count,

.makemeeting-table .total-row {

  border: 1px solid white;

  text-align: center;

}

.makemeeting-table .suggestion {

  /*background-color : #D0E3FB;*//* Light blue */

}

.makemeeting-table .suggestion,

.makemeeting-table .answer,

.makemeeting-table .total-count {

  border-left: 1px solid gray;

}

.makemeeting-table .answer {

  background: transparent no-repeat center;

  padding: 0;

}

.makemeeting-table .answer span {

  display: block;

  width: 24px;

  height: 24px;

  text-indent: -9999px;

  white-space: nowrap;

  overflow: hidden;

  margin: 0 auto;

}

.makemeeting-table .answer-0 {

  background-color: #FFCCCA;

}

.makemeeting-table .answer-0 span {

  background-image: url("images/delete.png");

}

.makemeeting-table .answer-1 {

  background-color: #D1F3D1;

}

.makemeeting-table .answer-1 span {

  background-image: url("images/accept.png");

}

.makemeeting-table .answer-2 {

  background-color: #FFEDA1;

}

.makemeeting-table .answer-2 span{

  background-image: url("images/warning.png");

}

.makemeeting-table tr.answer-form-row .radio,

.makemeeting-table tr.answer-form-row .checkbox {

  text-align: center;

}

.makemeeting-table .total-0.total-max {

  background-color: #FFCCCA;

}

.makemeeting-table .total-1.total-max {

  background-color: #D1F3D1;

}

.makemeeting-table .total-2.total-max {

  background-color: #FFEDA1;

}

.makemeeting-table .total-max {

  font-weight: bold;

  color: black;

}

<?php

/**

 * @file

 * This file is mostly about the field configuration.

 */

/**

 * Implements hook_field_info().

 */

function makemeeting_field_info() {

  return array(

    'makemeeting' => array(

      'label'             => t('Makemeeting form'),

      'description'       => t('This field stores user choices about some dates in the database.'),

      'default_widget'    => 'makemeeting_choices',

      'default_formatter' => 'makemeeting_answers',

    ),

  );

}

/**

 * Implements hook_field_widget_info().

 */

function makemeeting_field_widget_info() {

  return array(

    'makemeeting_choices' => array(

      'label'       => t('Makemeeting choices'),

      'field types' => array('makemeeting'),

      'behaviors'   => array(

        'default value' => FIELD_BEHAVIOR_NONE,

      ),

    ),

  );

}

/**

 * Implements hook_field_widget_settings_form().

 */

function makemeeting_field_widget_settings_form($field, $instance) {

  $widget = $instance['widget'];

  $settings = $widget['settings'];

  $form = array();

  if ($widget['type'] == 'makemeeting_choices') {

    $form['size'] = array(

      '#type'             => 'textfield',

      '#title'            => t('Number of dates'),

      '#default_value'    => isset($settings['size']) ? $settings['size'] : 1,

      '#element_validate' => array('element_validate_integer'),

      '#required'         => TRUE,

      '#size'             => 5,

      '#description'      => t('Default number of date choices to display. Must be positive or equal to 0.')

    );

  }

  return $form;

}

/**

 * Implements hook_field_widget_form().

 */

function makemeeting_field_widget_form(&$form, &$form_state, $field, $instance, $langcode, $items, $delta, $element) {

  $element += array(

    '#type' => 'fieldset',

  );

  $item =& $items[$delta];

  // Simple options form elements about the poll

  $element['hidden'] = array(

    '#title'         => t('Hidden poll'),

    '#description'   => t('Confidential participation: only you and administrators can see the answers.'),

    '#type'          => 'checkbox',

    '#default_value' => isset($item['hidden']) ? $item['hidden'] : '',

  );

  $element['one_option'] = array(

    '#title'         => t('Participant can only choose one option'),

    '#description'   => t('By default all options are selectable. This setting limits the choice to one option per participant.'),

    '#type'          => 'checkbox',

    '#default_value' => isset($item['one_option']) ? $item['one_option'] : '',

  );

  $element['limit'] = array(

    '#title'            => t('Limit the number of participants per option'),

    '#description'      => t('Poll as registration form: As soon as the indicated limit has been reached, the respective option is no longer available. 0 for unlimited'),

    '#type'             => 'textfield',

    '#default_value'    => isset($item['limit']) ? $item['limit'] : 0,

    '#element_validate' => array('element_validate_integer'),

  );

  $element['yesnomaybe'] = array(

    '#title'         => t('Provide a "Maybe" option'),

    '#description'   => t('Provide a third "Maybe" option in case users may be available.'),

    '#type'          => 'checkbox',

    '#default_value' => isset($item['yesnomaybe']) ? $item['yesnomaybe'] : '',

    // Hide if one_option is checked

    '#states'        => array(

      'visible' => array(

        ':input[name$="[one_option]"]' => array('checked' => FALSE),

      ),

    ),

  );

  $element['closed'] = array(

    '#title'         => t('Closed'),

    '#description'   => t('Check this when you want to close the poll.'),

    '#type'          => 'checkbox',

    '#default_value' => isset($item['closed']) ? $item['closed'] : '',

  );

  // Now let's take care of the choices part

  // $process is a callback that we will attach to the wrapper in order

  // to add parents to the form elements. This is so we can store

  // nested values in the DB table with field storage API.

  $fieldset_info = element_info('fieldset');

  $process = array_merge($fieldset_info['#process'], array('_makemeeting_rebuild_parents'));

  $element['choices_wrapper'] = array(

    '#tree'    => FALSE,

    '#prefix'  => '<div class="clearfix" id="makemeeting-choices-wrapper">',

    '#suffix'  => '</div>',

    '#process' => $process,

  );

  // Container just for the poll choices.

  $element['choices_wrapper']['choices'] = array(

    '#prefix' => '<div id="makemeeting-choices">',

    '#suffix' => '</div>',

    '#theme'  => 'makemeeting_choices',

  );

  // Fill the item values with previously submitted values

  if (!empty($form_state['values'])) {

    $submitted_values = drupal_array_get_nested_value($form_state['values'], $element['#field_parents']);

    $submitted_values = $submitted_values[$element['#field_name']][$element['#language']][$element['#delta']];

    if (isset($submitted_values['choices'])) {

      $item['choices'] = $submitted_values['choices'];

    }

  }

  // Calculate the suggestion count

  if (empty($form_state['suggestion_count'])) {

    $form_state['suggestion_count'] = 1;

  }

  if (isset($item['choices'])) {

    foreach ($item['choices'] as $choice) {

      if ($form_state['suggestion_count'] < count($choice['chsuggestions'])) {

        $form_state['suggestion_count'] = count($choice['chsuggestions']);

      }

    }

  }

  // Determine choice count if not provided

  if (!isset($form_state['choice_count'])) {

    try {

      list($entity_id) = entity_extract_ids($element['#entity_type'], $element['#entity']);

    } catch (Exception $e) {

      // Fail silently if the field is not attached to any entity yet.

    }

    // If the entity isn't created yet, offer the default number of choices,

    // else the number of previous choices, or 0 if none

    if (!isset($entity_id)) {

      $widget = $instance['widget'];

      $settings = $widget['settings'];

      $form_state['choice_count'] = isset($settings['size']) ? $settings['size'] : 1;

    }

    else {

      $form_state['choice_count'] = isset($item['choices']) ? count($item['choices']) : 0;

    }

  }

  // Add the current choices to the form.

  $delta = 0;

  if (isset($item['choices']) && $form_state['choice_count']) {

    // Sort choices by their dates

    asort($item['choices']);

    $delta = count($item['choices']);

    foreach ($item['choices'] as $key => $choice) {

      $element['choices_wrapper']['choices'][$key] =

        _makemeeting_choice_form($key, $choice['chdate'], $choice['chsuggestions'], $form_state['suggestion_count']);

    }

  }

  // Add choices as required.

  if ($form_state['choice_count']) {

    // Add a day to the last option's timestamp for the new default date

    $last_option_timestamp = isset($choice['chdate']) ? _makemeeting_date_timestamp($choice['chdate']) : REQUEST_TIME;

    $existing_delta = $delta;

    for (; $delta < $form_state['choice_count'] ; $delta++) {

      $additional_stamp = strtotime('+1 day', $last_option_timestamp);

      // Build default date

      $default_date = array(

        'month' => date('n', $additional_stamp),

        'day'   => date('j', $additional_stamp),

        'year'  => date('Y', $additional_stamp)

      );

      $key = 'new:' . ($delta - $existing_delta);

      $element['choices_wrapper']['choices'][$key] =

        _makemeeting_choice_form($key, $default_date, NULL, $form_state['suggestion_count']);

      // Repeat

      $last_option_timestamp = $additional_stamp;

    }

  }

  // We prefix our buttons with 'makemeeting' to avoid conflicts

  // with other modules using Ajax-enabled buttons with the id 'more'.

  $default_submit = array(

    '#type'                    => 'submit',

    '#limit_validation_errors' => array(array('choices')),

    '#submit'                  => array('makemeeting_choices_submit'),

    '#ajax'                    => array(

      'callback' => 'makemeeting_choice_js',

      'wrapper'  => 'makemeeting-choices-wrapper',

      'effect'   => 'fade',

    ),

  );

  $element['choices_wrapper']['makemeeting_more_choices'] = $default_submit + array(

      '#value'      => t('More choices'),

      '#attributes' => array(

        'title' => t("If the amount of rows above isn't enough, click here to add more choices."),

      ),

      '#weight'     => 1,

    );

  $element['choices_wrapper']['makemeeting_more_suggestions'] = $default_submit + array(

      '#value'      => t('More suggestions'),

      '#attributes' => array(

        'title' => t("If the amount of boxes above isn't enough, click here to add more suggestions."),

      ),

      '#weight'     => 2,

    );

  if ($form_state['choice_count'] > 1) {

    $element['choices_wrapper']['makemeeting_copy_suggestions'] = $default_submit + array(

        '#value'      => t('Copy and paste first row'),

        '#attributes' => array(

          'title' => t("Copy the suggestions from the first to the other rows."),

        ),

        '#weight'     => 3,

      );

  }

  return $element;

}

/**

 * Helper function to construct a row of the widget form

 *

 * @param $key

 * @param string $value

 * @param array $suggestions

 * @param int $size

 * @return array

 */

function _makemeeting_choice_form($key, $value = '', $suggestions = array(), $size = 1) {

  $form = array(

    '#tree' => TRUE,

  );

  // We'll manually set the #parents property of these fields so that

  // their values appear in the $form_state['values']['choices'] array

  // They are to be updated later in #process as we don't know here the

  // hierarchy of the parents

  $form['chdate'] = array(

    '#type'          => 'date',

    '#title'         => t('Date'),

    '#title_display' => 'invisible',

    '#default_value' => $value,

    '#parents'       => array('choices', $key, 'chdate'),

  );

  $form['chremove'] = array(

    '#type'                    => 'submit',

    '#parents'                 => array(),

    '#submit'                  => array('makemeeting_choices_submit'),

    '#limit_validation_errors' => array(array('choices')),

    '#ajax'                    => array(

      'callback' => 'makemeeting_choice_js',

      'wrapper'  => 'makemeeting-choices',

      'effect'   => 'fade',

    ),

    '#value'                   => t('Remove'),

    // Assigning key as name to make each 'Remove' button unique

    '#name'                    => $key,

  );

  $form['chsuggestions'] = array(

    '#tree'    => TRUE,

    '#parents' => array('choices', $key, 'chsuggestions'),

  );

  for ($i = 0 ; $i < $size ; $i++) {

    $key2 = 'sugg:' . ($i);

    $form['chsuggestions'][$key2] = array(

      '#type'          => 'textfield',

      '#title_display' => 'invisible',

      '#default_value' => isset($suggestions[$key2]) ? $suggestions[$key2] : '',

      '#size'          => 5,

      '#maxlength'     => 255,

      '#parents'       => array('choices', $key, 'chsuggestions', $key2),

    );

  }

  return $form;

}

/**

 * Helper function to update the form elements parents. This is required

 * for the element to be saved properly by the Field API (see #process)

 *

 * @param $element

 * @return mixed

 */

function _makemeeting_rebuild_parents(&$element) {

  $parents = array_diff($element['#array_parents'], $element['#parents']);

  $elements = array(

    'makemeeting_more_choices',

    'makemeeting_more_suggestions',

    'makemeeting_copy_suggestions'

  );

  foreach ($elements as $e) {

    $element[$e]['#parents'] = $parents;

    if (isset($element[$e]['#limit_validation_errors'])) {

      $element[$e]['#limit_validation_errors'][0] = array_merge($parents,

        $element[$e]['#limit_validation_errors'][0]);

    }

  }

  $element['makemeeting_more_suggestions']['#parents'] = $parents;

  $element['makemeeting_copy_suggestions']['#parents'] = $parents;

  foreach (element_children($element['choices']) as $key1) {

    foreach (element_children($element['choices'][$key1]) as $key2) {

      $keys = element_children($element['choices'][$key1][$key2]);

      if (empty($keys)) {

        $element['choices'][$key1][$key2]['#parents'] = array_merge($parents,

          $element['choices'][$key1][$key2]['#parents']);

      }

      else {

        foreach ($keys as $key3) {

          $element['choices'][$key1][$key2][$key3]['#parents'] = array_merge($parents,

            $element['choices'][$key1][$key2][$key3]['#parents']);

        }

      }

    }

  }

  return $element;

}

/**

 * Implements hook_field_validate().

 */

function makemeeting_field_validate($entity_type, $entity, $field, $instance, $langcode, $items, &$errors) {

  foreach ($items as $delta => $item) {

    if (isset($item['choices'])) {

      // Verify that we do not have duplicate dates

      $dates = array();

      foreach ($item['choices'] as $chid => $chvalue) {

        $date = implode('', $chvalue['chdate']);

        if (in_array($date, $dates)) {

          // Register an error with the choice id

          $errors[$field['field_name']][$langcode][$delta][] = array(

            'error'   => 'duplicate_dates',

            'message' => t('%name: you can\'t have duplicate dates.', array('%name' => $instance['label'])),

            'chid'    => $chid,

          );

        }

        else {

          $dates[] = $date;

        }

      }

    }

  }

}

/**

 * Implements hook_field_widget_error().

 */

function makemeeting_field_widget_error($element, $error) {

  // Show our error concerning duplicate dates here

  $choices = $element['choices_wrapper']['choices'];

  form_error($choices[$error['chid']]['chdate'], $error['message']);

}

/**

 * Implements hook_field_is_empty().

 */

function makemeeting_field_is_empty($item) {

  return empty($item['choices']);

}

/**

 * Implements hook_field_formatter_info().

 */

function makemeeting_field_formatter_info() {

  return array(

    'makemeeting_answers' => array(

      'label'       => t('Makemeeting answers'),

      'field types' => array('makemeeting'),

    ),

  );

}

/**

 * Implements hook_field_formatter_view().

 *

 * Build a renderable array for a field value.

 *

 * @param $entity_type

 *   The type of $entity.

 * @param $entity

 *   The entity being displayed.

 * @param $field

 *   The field structure.

 * @param $instance

 *   The field instance.

 * @param $langcode

 *   The language associated with $items.

 * @param $items

 *   Array of values for this field.

 * @param $display

 *   The display settings to use, as found in the 'display' entry of instance

 *   definitions. The array notably contains the following keys and values;

 *   - type: The name of the formatter to use.

 *   - settings: The array of formatter settings.

 *

 * @return array

 *  A renderable array for the $items, as an array of child elements keyed

 */

function makemeeting_field_formatter_view($entity_type, $entity, $field, $instance, $langcode, $items, $display) {

  $content = array();

  foreach ($items as $delta => $item) {

    list($entity_id) = entity_extract_ids($entity_type, $entity);

    $instance += array(

      'entity_id' => $entity_id,

      'language'  => $langcode,

      'delta'     => $delta

    );

    // Define answers hidden status here as we have $field variable available

    $item['is_hidden'] = (bool) $item['hidden'];

    if ($item['is_hidden']) {

      $access = field_access('edit', $field, $entity_type, $entity);

      if ($entity_type == 'node') {

        $access = $access && node_access('update', $entity);

      }

      elseif (module_exists('entity')) {

        $access = $access && entity_access('edit', $entity_type, $entity);

      }

      $item['is_hidden'] = $item['is_hidden'] && !$access;

    }

    $content[] = drupal_get_form('makemeeting_answers_form_' . $instance['entity_id'], $item, $instance);

  }

  return $content;

}

/**

 * Implements hook_field_load().

 */

function makemeeting_field_load($entity_type, $entities, $field, $instances, $langcode, &$items, $age) {

  // Unserialize array values

  foreach ($entities as $id => $entity) {

    foreach ($items[$id] as $delta => $item) {

      if ($field['type'] == 'makemeeting' && is_string($items[$id][$delta]['choices'])) {

        $items[$id][$delta]['choices'] = unserialize($items[$id][$delta]['choices']);

      }

    }

  }

}

/**

 * Implements hook_field_presave().

 */

function makemeeting_field_presave($entity_type, $entity, $field, $instance, $langcode, &$items) {

  if ($field['type'] == 'makemeeting') {

    foreach ($items as $delta => $item) {

      if (isset($item['choices'])) {

        // Sort the choices by date

        $choices = array_values($item['choices']);

        usort($choices, '_makemeeting_sort_choices');

        // Affect timestamp as keys

        $timestamped_choices = array();

        foreach ($choices as $choice) {

          $timestamped_choices[_makemeeting_date_timestamp($choice['chdate'])] = $choice;

        }

        // Serialize the whole array

        $items[$delta]['choices'] = serialize($timestamped_choices);

      }

    }

  }

}

/**

 * Helper function to sort choice dates

 */

function _makemeeting_sort_choices($a, $b) {

  if ($a['chdate']['year'] == $b['chdate']['year']) {

    if ($a['chdate']['month'] == $b['chdate']['month']) {

      if ($a['chdate']['day'] == $b['chdate']['day']) {

        return 0;

      }

      else {

        return (int) $a['chdate']['day'] < (int) $b['chdate']['day'] ? -1 : 1;

      }

    }

    else {

      return (int) $a['chdate']['month'] < (int) $b['chdate']['month'] ? -1 : 1;

    }

  }

  else {

    return (int) $a['chdate']['year'] < (int) $b['chdate']['year'] ? -1 : 1;

  }

}

/**

 * Submit handler to add more choices or suggestions to a poll form,

 * or to copy the first row of suggestions to the others

 *

 * This handler is run regardless of whether JS is enabled or not. It makes

 * changes to the form state. If the button was clicked with JS disabled, then

 * the page is reloaded with the complete rebuilt form. If the button was

 * clicked with JS enabled, then ajax_form_callback() calls makemeeting_choice_js() to

 * return just the changed part of the form.

 */

function makemeeting_choices_submit($form, &$form_state) {

  $clicked_button = $form_state['clicked_button'];

  // Get the element

  $element =& drupal_array_get_nested_value($form_state['input'], $clicked_button['#parents']);

  // If clicked button is 'Remove', unset corresponding choice

  if ($clicked_button['#value'] == t('Remove')) {

    unset($element['choices'][$clicked_button['#name']]);

    $form_state['choice_count'] = count($element['choices']);

  }

  // Affect timestamp as key to each choice

  $choices = array();

  if (isset($element['choices'])) {

    foreach ($element['choices'] as $choice) {

      $choices['choices'][_makemeeting_date_timestamp($choice['chdate'])] = $choice;

    }

  }

  // Handle other operations

  if (!empty($form_state['values']['op'])) {

    switch ($form_state['values']['op']) {

      // Add 1 more choice to the form.

      case t('More choices'):

        // Increment choice count

        $form_state['choice_count'] = count($element['choices']) + 1;

        break;

      // Add 1 more suggestion to the form.

      case t('More suggestions'):

        $form_state['suggestion_count']++;

        break;

      // Copy first row suggestions to the other rows.

      case t('Copy and paste first row');

        $first = reset($choices['choices']);

        foreach (array_keys($choices['choices']) as $key) {

          $choices['choices'][$key]['chsuggestions'] = $first['chsuggestions'];

        }

        break;

    }

  }

  // Replace submitted values by our own work

  drupal_array_set_nested_value($form_state['input'], $clicked_button['#parents'], $choices);

  drupal_array_set_nested_value($form_state['values'], $clicked_button['#parents'], $choices);

  // Require the widget form to rebuild the choices

  // with the values in $form_state

  $form_state['rebuild'] = TRUE;

}

/**

 * Ajax callback in response to new choices being added to the form.

 *

 * This returns the new page content to replace the page content made obsolete

 * by the form submission.

 */

function makemeeting_choice_js($form, $form_state) {

  // Get the element from the parents of the clicked button

  $element = drupal_array_get_nested_value($form, $form_state['clicked_button']['#parents']);

  return $element['choices_wrapper'];

}

name = Make Meeting

description = Field allowing to schedule an event

core = 7.x

package = Fields

dependencies[] = field

files[] = makemeeting.test

; Information added by Drupal.org packaging script on 2016-10-21

version = "7.x-2.1"

core = "7.x"

project = "makemeeting"

datestamp = "1477053252"

<?php

/**

 * @file

 * Makemeeting installation schemas

 */

/**

 * Implements hook_field_schema().

 */

function makemeeting_field_schema($field) {

  return array(

    'columns' => array(

      'closed' => array(

        'type' => 'int',

        'length' => 1,

        'not null' => FALSE,

        'default' => 0,

      ),

      'hidden' => array(

        'type' => 'int',

        'length' => 1,

        'not null' => FALSE,

        'default' => 0,

      ),

      'one_option' => array(

        'type' => 'int',

        'length' => 1,

        'not null' => FALSE,

        'default' => 0,

      ),

      'limit' => array(

        'type' => 'int',

        'not null' => FALSE,

        'default' => 0,

      ),

      'yesnomaybe' => array(

        'type' => 'int',

        'length' => 1,

        'not null' => FALSE,

        'default' => 0,

      ),

      'choices' => array(

        'type' => 'blob',

        'not null' => FALSE,

        'size' => 'big',

        'serialize' => TRUE,

      ),

    ),

  );

}

/**

 * Implements hook_schema().

 */

function makemeeting_schema() {

  $schema['makemeeting_answers'] = array(

    'description' => 'The choices by the visitors.',

    'fields' => array(

      'answer_id' => array(

        'type' => 'serial',

        'unsigned' => TRUE,

        'not null' => TRUE,

      ),

      'field_name' => array(

        'type' => 'varchar',

        'length' => 32,

        'not null' => TRUE,

        'description' => 'The name of the field this data is attached to',

      ),

      'entity_type' => array(

        'type' => 'varchar',

        'length' => 128,

        'not null' => TRUE,

        'default' => '',

        'description' => 'The entity type this data is attached to',

      ),

      'deleted' => array(

        'type' => 'int',

        'size' => 'tiny',

        'not null' => TRUE,

        'default' => 0,

        'description' => 'A boolean indicating whether this data item has been deleted'

      ),

      'entity_id' => array(

        'type' => 'int',

        'unsigned' => TRUE,

        'not null' => TRUE,

        'description' => 'The entity id this data is attached to',

      ),

      'language' => array(

        'type' => 'varchar',

        'length' => 32,

        'not null' => TRUE,

        'default' => '',

        'description' => 'The language for this data item.',

      ),

      'delta' => array(

        'type' => 'int',

        'unsigned' => TRUE,

        'not null' => TRUE,

        'description' => 'The sequence number for this data item, used for multi-value fields',

      ),

      'value' => array(

        'type' => 'text',

        'serialize' => TRUE,

      ),

      'uid' => array(

        'type' => 'int',

        'unsigned' => TRUE,

        'not null' => TRUE,

        'default' => 0,

      ),

      'name' => array(

        'type' => 'varchar',

        'length' => 255,

      ),

      'mail' => array(

        'type' => 'varchar',

        'length' => 255,

      ),

      'notification' => array(

        'type' => 'int',

        'not null' => TRUE,

        'length' => 1,

        'default' => 0,

      ),

    ),

    'primary key' => array('answer_id'),

  );

  return $schema;

}

/**

 * Add yesnomaybe column to field tables

 */

function makemeeting_update_7201() {

  $results = db_select('field_config', 'fc')

             ->fields('fc')

             ->condition('type', 'makemeeting')

             ->execute()

             ->fetchAll();

  foreach ($results as $field) {

    foreach (array('data', 'revision') as $type) {

      $table = "field_{$type}_{$field->field_name}";

      $column = "{$field->field_name}_yesnomaybe";

      // Data and revision tables need to be fixed

      if (!db_field_exists($table, $column)) {

        db_add_field($table, $column, array(

          'type' => 'int',

          'length' => 1,

          'not null' => FALSE,

          'default' => 0,

        ));

      }

    }

  }

}

(function ($) {

  Drupal.behaviors.makemeetingHoverButtons = {

    attach: function (context) {

      var $trs = $('.makemeeting-table', context).find('tr.editable');

      $trs.removeClass('in').hover(function () {

        // This will hide all other tr

        $trs.filter(':not(.hovering)').removeClass('in');

        $(this).addClass('in hovering');

      }, function () {

        // Hide links after a while

        $(this).removeClass('hovering');

        setTimeout(function () {

          $trs.filter(':not(.hovering)').removeClass('in');

        }, 500);

      });

    }

  };

  Drupal.behaviors.makemeetingFormWidth = {

    attach: function (context) {

      if ($(context).is('.editing')) {

        $(context).next().find('td').each(function (index) {

          $('form td', context).eq(index).css('width', $(this).width() + 'px');

        });

      }

    }

  };

}(jQuery));

<?php

/**

 * @file

 * Hooks and field implementations

 */

// Define choice constants

define('MAKEMEETING_ANSWER_PERM', 'answer makemeeting form');

define('MAKEMEETING_EDIT_PERM', 'edit any makemeeting answer');

define('MAKEMEETING_DELETE_PERM', 'delete any makemeeting answer');

define('MAKEMEETING_NO', 0);

define('MAKEMEETING_YES', 1);

define('MAKEMEETING_MAYBE', 2);

/**

 * Include required files.

 */

include_once 'makemeeting.field.inc';

/**

 * Implements hook_permission().

 */

function makemeeting_permission() {

  return array(

    MAKEMEETING_ANSWER_PERM => array(

      'title' => t('Provide an answer to makemeeting forms'),

      'description' => t('Give the ability to make a choice in makemeeting answer forms.'),

    ),

    MAKEMEETING_EDIT_PERM => array(

      'title' => t('Edit any makemeeting answers'),

      'description' => t('Edit answers given by other users.'),

    ),

    MAKEMEETING_DELETE_PERM => array(

      'title' => t('Delete any makemeeting answers'),

      'description' => t('Delete answers given by other users.'),

    ),

  );

}

/**

 * Implements hook_menu().

 */

function makemeeting_menu() {

  $items['makemeeting/delete-answer/%makemeeting_answer'] = array(

    'title' => 'Remove an answer',

    'page callback' => 'drupal_get_form',

    'page arguments' => array('makemeeting_delete_answer', 2),

    'access callback' => 'makemeeting_delete_answer_access',

    'access arguments' => array(2),

    'type' => MENU_CALLBACK,

  );

  $items['makemeeting/edit-answer/%makemeeting_answer'] = array(

    'title' => 'Edit an answer',

    'page callback' => 'makemeeting_edit_answer',

    'page arguments' => array(2),

    'access callback' => 'makemeeting_edit_answer_access',

    'access arguments' => array(2),

    'type' => MENU_CALLBACK,

  );

  return $items;

}

/**

 * Load an answer

 *

 * @param $answer_id

 * @return mixed

 */

function makemeeting_answer_load($answer_id) {

  $answer = db_select('makemeeting_answers', 'm')

            ->fields('m')

            ->condition('answer_id', $answer_id)

            ->execute()

            ->fetchAssoc();

  $answer['value'] = unserialize($answer['value']);

  return $answer ? (object) $answer : FALSE;

}

/**

 * Access callback: delete an answer

 *

 * @param $answer

 * @return bool

 */

function makemeeting_delete_answer_access($answer) {

  global $user;

  return user_access(MAKEMEETING_DELETE_PERM) || (user_is_logged_in() && $answer->uid == $user->uid);

}

/**

 * Access callback: edit an answer

 *

 * @param $answer

 * @return bool

 */

function makemeeting_edit_answer_access($answer) {

  global $user;

  return user_access(MAKEMEETING_EDIT_PERM) || (user_is_logged_in() && $answer->uid == $user->uid);

}

/**

 * Menu callback: delete an answer

 *

 * @param $form

 * @param $form_state

 * @param $answer

 * @param bool $redirect

 * @return

 */

function makemeeting_delete_answer($form, &$form_state, $answer, $redirect = TRUE) {

  $form['#answer'] = $answer;

  return confirm_form(

    $form,

    t('Are you sure you want to delete the answer?'),

    ''