/**

*

* @var Devb_Conditional_Xprofile_Field_Helper singleton instance

*/

private static $instance;

/**

* file system absolute path to this plugin directory (Has a trailing / at the end)

*

* @var type

*/

private $path;

/**

* Absolute url to this plugin directory (has a trailing slash)

*

* @var type

*/

private $url;

/**

* Keeps info about all the BuddyPress Xprofile fields.

*

* Multi dimensional array of the type

* array( 'field_1'=> array(

* 'conditions'=> array( 'field_id' => 2, 'value'=>'something', 'operator'=> 'any of the allowed operator' ),

* 'type'=> multiselect|select|datebox|checkbox|radiobutton etc (The last name in lowercase of the profile field type),

* 'children'=> array() //array of all the children

* ),

*

* 'field_x'=> array(

* 'conditions'=> array( 'field_id' => 5, 'value'=>'something', 'operator'=> 'any of the allowed operator' ),

* 'type'=> multiselect|select|datebox|checkbox|radiobutton etc (The last name in lowercase of the profile field type),

* 'children'=> array() //array of all the children

* ),

*

*

*

* )

* @var type

*/

private $fields = array();

private $data = array();//keep a copy of the field data

//

//info about the fields which cause conditions to be applied on other fields

private $conditional_fields = array();

private function __construct() {

$this->path = plugin_dir_path( __FILE__ );

$this->url = plugin_dir_url( __FILE__ );

//load required files

add_action( 'bp_loaded', array( $this, 'load' ) );

//load css/js for the front end

add_action( 'bp_enqueue_scripts', array( $this, 'load_js' ) );

//we don't dd any css at the moment

//add_action( 'bp_enqueue_scripts', array( $this, 'load_css' ) );

//inject the conditions as javascript object

add_action( 'bp_head', array( $this, 'to_js_objects' ) );

//when the user account is activated, do not save the fields trigerred by the condition

add_action( 'bp_core_activated_user', array( $this, 'update_saved_fields' ) );

//when user profile is updated, check and update for condition

add_action( 'xprofile_updated_profile', array( $this, 'update_saved_fields' ) );

}

/**

* Creates/returns Singleton instance

*

* @return Devb_Conditional_Xprofile_Field_Helper

*/

public static function get_instance() {

if ( ! isset( self::$instance ) )

self::$instance = new self();

return self::$instance;

}

/**

* Load required files

*/

public function load() {

$files = array();

if ( is_admin() ) {

$files[] = 'admin.php';

}

foreach ( $files as $file )

require_once $this->path . $file;

}

/**

* Builds the condition details

*/

public function build_conditions() {

$groups = BP_XProfile_Group::get(

array(

'fetch_fields' => true,

)

);

foreach ( $groups as $group ) {

foreach ( $group->fields as $field ) {

$this->fields['field_'. $field->id]['data'] = $field;

$field = new BP_XProfile_Field( $field->id );

//READ IT PLEASE

//Now, I need type to handle the event binding on client side

////the problem is there are inconsistency in the way id/class are applied on generated view, That's why I need type info

//BuddyPress does not give explicit type, except for the class name,

// now, It is bad but I am stil going to do it anyway

//Can we improve this in future?

$class_name = explode( '_', get_class( $field->type_obj ) );

$class_name = strtolower( array_pop( $class_name ) );

$this->fields['field_' . $field->id ]['type'] = $class_name;

//we got type+data

//let us get the children

$children = $field->get_children();

if ( ! empty( $children ) ) {

$this->fields['field_' . $field->id]['children']= $children;

}

$related_id = $this->get_related_field_id( $field->id );

//if this field has no condition set, let us not worry

if ( ! $related_id )

continue;

//if we have condition set on this field, let us get info

$this->conditional_fields['field_' . $related_id]['conditions'][] = $this->get_field_condition( $field->id );

}

}

$this->data = $this->get_data();

}

private function get_data( $user_id = false ) {

$data = array();

if( ! is_user_logged_in() )

return $data;

if( ! $user_id )

$user_id = get_current_user_id ();

//incase we are on someone's profile, override user id

if( bp_is_user() )

$user_id = bp_displayed_user_id ();

$groups = bp_xprofile_get_groups( array(

'user_id' => $user_id,

'hide_empty_groups' => true,

'hide_empty_fields' => true,

'fetch_fields' => true,

'fetch_field_data' => true,

) );

foreach ( (array) $groups as $group ) {

if ( empty( $group->fields ) ) {

continue;

}

foreach ( (array) $group->fields as $field ) {

$data[ 'field_'. $field->id ] = array(

//'group_id' => $group->id,

//'field_id' => $field->id,

'field_type' => $field->type,

'value' => $field->data->value,

);

}

}

return $data;

}

/**

* Get the condition applied on a field

*

* @param type $field_id

* @return array('field_id', 'visibility', 'operator', 'value' )

*/

public function get_field_condition( $field_id ) {

$visibility = bp_xprofile_get_meta( $field_id, 'field', 'xprofile_condition_display' );

$operator = bp_xprofile_get_meta( $field_id, 'field', 'xprofile_condition_operator' );

$value2 = bp_xprofile_get_meta( $field_id, 'field', 'xprofile_condition_other_field_value' );

//check if it was a muti type field, then we need to send the name as value instead of id

$related_field_id = $this->get_related_field_id( $field_id );

$related_field = new BP_XProfile_Field( $related_field_id );

//is the related field having multi type?

$children = $related_field->get_children();

$value = array();

if ( ! empty( $children ) ) {

//if yes, we need to replace the value(as the value is id of the child option) with the name of the child option

foreach ( $children as $child ) {

if ( in_array( $child->id, $value2 ) ) {

array_push( $value, $child->name );

//$value = stripslashes( $child->name );

//break;

}

}

}

return compact( 'field_id', 'visibility', 'operator', 'value' );

}

/**

* Get the related field that triggers condition for the give field

*

* @param type $field_id

* @return type

*/

public function get_related_field_id( $field_id ) {

$related_field = bp_xprofile_get_meta( $field_id, 'field', 'xprofile_condition_other_field' );

return $related_field;

}

/**

* Delete the fields on new user activation/profile update that do not conform to our condition

* and yes, I am the boss here, don' ask me the logic :P

*

* @param type $user_id

*/

public function update_saved_fields( $user_id ) {

//build all conditions array

$this->build_conditions();

//get the fields whose value triggers conditions

$conditional_fields = $this->conditional_fields;

//Now, There can be multiple conditional fields

foreach ( $conditional_fields as $conditional_field_id => $related_fields ) {

//for each field triggering the condition, get the field data for this field

$conditional_field_id = (int)str_replace('field_', '', $conditional_field_id );

$data = xprofile_get_field_data( $conditional_field_id, $user_id, 'array' );

//find all the conditions which are based on the vale of this field

foreach( $related_fields['conditions'] as $condition ) {

//check if condition is matched

if( $this->is_match( $data , $condition['value'], $condition['operator'] ) ) {

//if visibility is set to hidden and condition matched, delete data for the field on which this condition is applied

if( $condition['visibility'] =='hide'){

xprofile_delete_field_data( $condition['field_id'], $user_id );

}

}else{

//if there is no match and the visibility is set to show on condition, we still need to delete the data for the field on which this condition is applied

if( $condition['visibility'] == 'show' ) {

xprofile_delete_field_data( $condition['field_id'], $user_id );

}

}

}

}

}

/**

* Check if given the value, conditional value and operator, if there is a match?

*

* @param type $current_val

* @param type $val

* @param type $operator

* @return boolean

*/

public function is_match( $current_val, $val, $operator ) {

$matched = false;

switch( $operator ) {

case '=':

if( ! is_array( $current_val ) && $current_val == $val )

$matched = true;

elseif( is_array( $current_val ) && in_array( $val, $current_val ) )

$matched = true;

break;

case '!=':

if( !is_array( $current_val ) && $current_val != $val )

$matched = true;

elseif( is_array( $current_val ) && !in_array( $val, $current_val ))

$matched = true;

break;

case '<=':

if( $current_val <= $val )

$matched = true;

break;

case '>=':

if( $current_val >= $val )

$matched = true;

break;

case '<':

if( $current_val < $val )

$matched = true;

break;

case '>':

if( $current_val > $val )

$matched = true;

break;

}

return $matched;

}

/**

* Injects the profile field conditions a js object

*

*/

public function to_js_objects() {

if ( ! $this->is_active() )

return;

$this->build_conditions();

?>

<script type='text/javascript'>

var xpfields = <?php echo json_encode( array( 'fields'=> $this->fields, 'conditional_fields'=> $this->conditional_fields, 'data' => $this->data ) ); ?>

</script>

<?php

}

/**

* Check if we should load the assets for conditional profile field on this page or not?

*

* @return type

*/

public function is_active() {

$is_active = false;

//by default we activate only on register page or profile page

if ( ! is_admin() && ( bp_is_register_page() || bp_is_user_profile_edit() ) )

$is_active = true;

return apply_filters( 'bp_is_conditional_profile_field_active', $is_active );

}

/**

* Loads Js required for front end

*/

public function load_js() {

if ( ! $this->is_active() )

return;

wp_enqueue_script( 'bp-conditional-profile-js', $this->url . 'assets/bp-conditional-field.js', array( 'jquery' ) );

}

/**

* Loads css required for front end

* Infact we don't need any at the moment

*

*/

public function load_css() {

if ( ! $this->is_active() )

return;

wp_enqueue_script( 'bp-conditional-profile-css', $this->url . 'assets/bp-conditional-field.css' );

}