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<?php
/**
 * Cleverness To-Do List Plugin Widget
 *
 * Creates the to-do list widget
 * @author C.M. Kendrick <cindy@cleverness.org>
 * @package cleverness-to-do-list
 * @version 3.2
 */

/**
 * Widget class
 * @package cleverness-to-do-list
 * @subpackage includes
 */
class CTDL_Widget extends WP_Widget {

	protected $cat_id = '';

	function __construct() {
		parent::__construct( 'cleverness-to-do-widget', apply_filters( 'ctdl_todo_list', esc_html__( 'To-Do List', 'cleverness-to-do-list' ) ),
			array( 'description' => __( 'Displays To-Do List Items', 'cleverness-to-do-list' ) ) );
	}

	/**
	 * Creates the widget
	 * @param $args
	 * @param $instance
	 *
	 */
	function widget( $args, $instance ) {
		global $ClevernessToDoList, $CTDL_widget_settings;
		$CTDL_widget_settings = $instance;
		get_currentuserinfo();

		$title       = apply_filters( 'widget_title', $instance['title'] );
		$limit       = ( $instance['number'] == '-1' ? 1000 : $instance['number'] );
		$assigned_to = $instance['assigned_to'];
		$deadline    = $instance['deadline'];
		$progress    = $instance['progress'];
		$category    = ( CTDL_Loader::$settings['categories'] == 1 ? $instance['category'] : 0 );
		$individual  = ( isset( $instance['individual'] ) ? $instance['individual'] : 0 );

		if ( $individual == 1 && is_user_logged_in() ) {
			global $current_user, $userdata;
			if ( CTDL_Loader::$settings['list_view'] == '2' ) {
				$user = $current_user->ID;
			} else {
				$user = $userdata->ID;
			}
		} else {
			//$user = 0;
			return;
		}

		echo $args['before_widget'];

		if ( $title ) {
			echo $args['before_title'];
			echo $title;
			echo $args['after_title'];
		}

		$ClevernessToDoList->list = '';
		$visible = 0;

		if ( CTDL_Loader::$settings['categories'] == 1 && CTDL_Loader::$settings['sort_order'] == 'cat_id' && $category == 0 ) {

			$categories = CTDL_Categories::get_categories();
			$items = 0;
			$posts_to_exclude = array();
			$visibility = get_option( 'CTDL_categories' );

			foreach ( $categories as $category ) {

				echo '<ol>';

				$category_id = $category->term_id;
				$visible = $visibility["category_$category->term_id"];

				$todo_items = CTDL_Lib::get_todos( $user, $limit, 0, $category_id );

				if ( $todo_items->have_posts() ) {
					array_splice( $posts_to_exclude, count( $posts_to_exclude ), 0, $this->show_todo_list_items( $todo_items, $progress, $deadline, $assigned_to, 0, $visible ) );
					$items = 1;
				}

				echo '</ol>';

			}

			$todo_items = CTDL_Lib::get_todos( $user, $limit, 0, 0, $posts_to_exclude );

			if ( $todo_items->have_posts() ) {
				echo '<ol>';
				$this->show_todo_list_items( $todo_items, $progress, $deadline, $assigned_to, 0, $visible );
				echo '</ol>';
				$items = 1;
			}

			if ( $items == 0 ) {
				echo '<p>'.apply_filters( 'ctdl_no_items', esc_html__( 'No items to do.', 'cleverness-to-do-list' ) ).'</p>';
			}

		} else {

			echo '<ol>';

			$todo_items = CTDL_Lib::get_todos( $user, $limit, 0, $category );

			if ( $todo_items->have_posts() ) {
				$this->show_todo_list_items( $todo_items, $progress, $deadline, $assigned_to, $category, $visible );
			} else {
				echo '<p>'.apply_filters( 'ctdl_no_items', esc_html__( 'No items to do.', 'cleverness-to-do-list' ) ).'</p>';
			}

		}

		echo '</ol>';

		echo $args['after_widget'];
	}

	/**
	 * Generate the To-Do List
	 * @param $todo_items
	 * @param $progress
	 * @param $deadline
	 * @param $assigned_to
	 * @param int $category
	 * @param int $visible
	 * @return array $posts_to_exclude
	 */
	protected function show_todo_list_items( $todo_items, $progress, $deadline, $assigned_to, $category = 0, $visible = 0 ) {
		global $CTDL_templates, $CTDL_visibility;
		if ( CTDL_Loader::$settings['categories'] == 1 ) $CTDL_visibility = get_option( 'CTDL_categories' );

		while ( $todo_items->have_posts() ) : $todo_items->the_post();
			$id = get_the_ID();
			$posts_to_exclude[] = $id;

			if ( $visible == 0 ) {

				if ( CTDL_Loader::$settings['categories'] == 1 && CTDL_Loader::$settings['sort_order'] == 'cat_id' && $category == '0' ) {
					$cats = get_the_terms( get_the_ID(), 'todocategories' );
					if ( $cats != null ) {
						foreach ( $cats as $category ) {
							if ( $this->cat_id != $category->term_id ) {
								echo '<h4>' . esc_html( $category->name ) . '</h4>';
								$this->cat_id = $category->term_id;
							}
						}
					}
				}

				$CTDL_templates->get_template_part( 'widget', 'single' );
			}

		endwhile;

		wp_reset_postdata();

		return $posts_to_exclude;
	}

	/**
	 * Updates the widget settings
	 * @param $new_instance
	 * @param $old_instance
	 * @return array
	 */
	function update( $new_instance, $old_instance ) {
		$instance = $old_instance;
		$instance['title'] = strip_tags( $new_instance['title'] );
		$instance['number'] = $new_instance['number'];
		$instance['assigned_to'] = $new_instance['assigned_to'];
		$instance['deadline'] = $new_instance['deadline'];
		$instance['progress'] = $new_instance['progress'];
		$instance['category'] = $new_instance['category'];
		$instance['individual'] = $new_instance['individual'];
		return $instance;
	}

	/**
	 * Creates the form for the widget settings
	 * @param $instance
	 * @return string|void
	 */
	function form( $instance ) {
		$defaults = array( 'title' => apply_filters( 'ctdl_todo_list', esc_html__( 'To-Do List', 'cleverness-to-do-list' ) ), 'number' => '5', 'assigned_to' => false, 'deadline' => false, 'progress' => false, 'individual' => 0, 'category' => 'All' );
		$instance = wp_parse_args( ( array ) $instance, $defaults ); ?>

		<p>
			<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title', 'cleverness-to-do-list' ); ?>:
			<input id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" value="<?php echo $instance['title']; ?>" class="widefat" type="text" />
			</label>
		</p>

		<p>
			<label for="<?php echo $this->get_field_id( 'number' ); ?>"><?php _e( 'Number of Items to Display', 'cleverness-to-do-list' ); ?>:</label>
			<select id="<?php echo $this->get_field_id( 'number' ); ?>" name="<?php echo $this->get_field_name( 'number' ); ?>">
				<option <?php if ( '1' == $instance['number'] ) echo 'selected="selected"'; ?>>1</option>
				<option <?php if ( '5' == $instance['number'] ) echo 'selected="selected"'; ?>>5</option>
				<option <?php if ( '10' == $instance['number'] ) echo 'selected="selected"'; ?>>10</option>
				<option <?php if ( '15' == $instance['number'] ) echo 'selected="selected"'; ?>>15</option>
				<option <?php if ( '20' == $instance['number'] ) echo 'selected="selected"'; ?>>20</option>
				<option <?php if ( '-1' == $instance['number'] ) echo 'selected="selected"'; ?> value="-1"><?php _e( 'All', 'cleverness-to-do-list' ); ?></option>
			</select>
		</p>

		<?php if ( CTDL_Loader::$settings['categories'] == '1' ) : ?>
			<p>
				<label for="<?php echo $this->get_field_id( 'category' ); ?>"><?php echo apply_filters( 'ctdl_category', esc_html__( 'Category', 'cleverness-to-do-list' ) ); ?>:</label>
				<?php wp_dropdown_categories( 'taxonomy=todocategories&echo=1&orderby=name&hide_empty=0&show_option_all='.__( 'All', 'cleverness-to-do-list' ).
					'&id='.$this->get_field_id( 'category' ).'&name='.$this->get_field_name( 'category' ).'&selected='.$instance['category'] ); ?>
			</p>
		<?php endif; ?>

		<p>
			<input class="checkbox" type="checkbox" <?php checked( $instance['assigned_to'], true ); ?> value="1" id="<?php echo $this->get_field_id( 'assigned_to' ); ?>" name="<?php echo $this->get_field_name( 'assigned_to' ); ?>" />
			<label for="<?php echo $this->get_field_id( 'assigned_to' ); ?>"><?php _e( 'Show Assigned To', 'cleverness-to-do-list' ); ?></label>
			<br />
			<input class="checkbox" type="checkbox" <?php checked( $instance['deadline'] ); ?> value="1" id="<?php echo $this->get_field_id( 'deadline' ); ?>" name="<?php echo $this->get_field_name( 'deadline' ); ?>" />
			<label for="<?php echo $this->get_field_id( 'deadline' ); ?>"><?php _e( 'Show Deadline', 'cleverness-to-do-list' ); ?></label>
			<br />
			<input class="checkbox" type="checkbox" <?php checked( $instance['progress'] ); ?> value="1" id="<?php echo $this->get_field_id( 'progress' ); ?>" name="<?php echo $this->get_field_name( 'progress' ); ?>" />
			<label for="<?php echo $this->get_field_id( 'progress' ); ?>"><?php _e( 'Show Progress', 'cleverness-to-do-list' ); ?></label>
			<br />
			<input class="checkbox" type="checkbox" <?php checked( $instance['individual'] ); ?> value="1" id="<?php echo $this->get_field_id( 'individual' ); ?>" name="<?php echo $this->get_field_name( 'individual' ); ?>" />
			<label for="<?php echo $this->get_field_id( 'individual' ); ?>"><?php _e( 'Show Only Logged-In User\'s Items', 'cleverness-to-do-list' ); ?></label>
		</p>
		<?php
	}

}

add_action( 'widgets_init', 'cleverness_todo_register_widget' );
function cleverness_todo_register_widget() {
	register_widget( 'CTDL_Widget' );
}