<?php

class WidgetContextWordCount {

	private static $instance;
	private $wc;

	var $words_on_page = 0;

	public function __construct( $plugin ) {
		$this->wc = $plugin;
	}

	public function init() {
		// Check the number of words on page
		add_action( 'wp', array( $this, 'count_words_on_page' ) );

		// Define our context
		add_filter( 'widget_contexts', array( $this, 'add_word_count_context' ) );

		add_filter( 'widget_context_control-word_count', array( $this, 'control_word_count' ), 10, 2 );
		add_filter( 'widget_context_check-word_count', array( $this, 'context_check_word_count' ), 10, 2 );
	}

	function add_word_count_context( $contexts ) {
		$contexts['word_count'] = array(
			'label' => __( 'Word Count', 'widget-context' ),
			'description' => __( 'Context based on word count on the page.', 'widget-context' ),
			'weight' => 15,
		);

		return $contexts;
	}


	function count_words_on_page() {
		global $wp_query;

		if ( empty( $wp_query->posts ) || is_admin() ) {
			return;
		}

		foreach ( $wp_query->posts as $post_data ) {
			$this->words_on_page += str_word_count( strip_tags( strip_shortcodes( $post_data->post_content ) ) );
		}
	}


	function context_check_word_count( $check, $settings ) {
		$settings = wp_parse_args(
			$settings,
			array(
				'check_wordcount' => false,
				'word_count' => null,
				'check_wordcount_type' => null,
			)
		);

		// Make sure this context check was enabled
		if ( ! $settings['check_wordcount'] ) {
			return $check;
		}

		$word_count = (int) $settings['word_count'];

		// No word count specified, bail out
		if ( ! $word_count ) {
			return $check;
		}

		if ( 'less' === $settings['check_wordcount_type'] && $this->words_on_page < $word_count ) {
			return true;
		} elseif ( 'more' === $settings['check_wordcount_type'] && $this->words_on_page > $word_count ) {
			return true;
		}

		return $check;
	}


	function control_word_count( $control_args ) {
		return sprintf(
			'<p>%s %s %s</p>',
			$this->wc->make_simple_checkbox( $control_args, 'check_wordcount', __( 'Has', 'widget-context' ) ),
			$this->wc->make_simple_dropdown(
				$control_args,
				'check_wordcount_type',
				array(
					'less' => __( 'less', 'widget-context' ),
					'more' => __(
						'more',
						'widget-context'
					),
				),
				null,
				__( 'than', 'widget-context' )
			),
			$this->wc->make_simple_textfield( $control_args, 'word_count', null, __( 'words', 'widget-context' ) )
		);
	}

}

• [F] module.php
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