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<?php

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if ( ! defined( 'ABSPATH' ) ) {

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exit;

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}

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function ampforwp_framework_get_post_pagination( $args = '' ) {

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wp_reset_postdata();

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global $page, $numpages, $multipage, $more, $redux_builder_amp;

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$next_class = $previous_class = '';

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$defaults = array(

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'before' => '' . ( ''. ampforwp_translation($redux_builder_amp['amp-translator-page-text'], 'Page') .':' ),

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'after' => '',

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'link_before' => '',

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'link_after' => '',

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'next_or_number' => 'number',

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'separator' => ' ',

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'nextpagelink' => ampforwp_translation($redux_builder_amp['amp-translator-next-text'], 'Next page'),

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'previouspagelink' => ampforwp_translation($redux_builder_amp['amp-translator-previous-text'], 'Previous page'),

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'pagelink' => '%',

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'echo' => 1

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);

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$params = wp_parse_args( $args, $defaults );

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/**

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* Filters the arguments used in retrieving page links for paginated posts.

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* @param array $params An array of arguments for page links for paginated posts.

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$r = apply_filters( 'ampforwp_framework_get_post_pagination_args', $params );

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if ( isset($params['next_class']) ) {

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$next_class = $params['next_class'];

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}

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if ( isset($params['previous_class']) ) {

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$previous_class = $params['previous_class'];

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}

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$output = '';

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if ( $multipage ) {

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if ( 'number' == $r['next_or_number'] ) {

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$output .= $r['before'];

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for ( $i = 1; $i <= $numpages; $i++ ) {

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$link = $r['link_before'] . str_replace( '%', ''.$i.'', $r['pagelink'] ) . $r['link_after'];

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if ( $i != $page || ! $more && 1 == $page ) {

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$link = ampforwp_framework_get_post_paginated_link( $i ) . $link . '</a>';

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}

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/**

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* Filters the HTML output of individual page number links.

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* @param string $link The page number HTML output.

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* @param int $i Page number for paginated posts' page links.

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$link = apply_filters( 'ampforwp_framework_get_post_pagination_link', $link, $i );

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// Use the custom links separator beginning with the second link.

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$output .= ( 1 === $i ) ? ' ' : $r['separator'];

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$output .= $link;

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}

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$output .= $r['after'];

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} elseif ( $more ) {

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$output .= $r['before'];

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$prev = $page - 1;

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if ( $prev > 0 ) {

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$link = ampforwp_framework_get_post_paginated_link( $prev, $previous_class ) . $r['link_before'] . $r['previouspagelink'] . $r['link_after'] . '</a>';

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$output .= apply_filters( 'ampforwp_framework_get_post_pagination_link', $link, $prev );

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}

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$next = $page + 1;

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if ( $next <= $numpages ) {

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if ( $prev ) {

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$output .= $r['separator'];

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}

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$link = ampforwp_framework_get_post_paginated_link( $next, $next_class ) . $r['link_before'] . $r['nextpagelink'] . $r['link_after'] . '</a>';

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$output .= apply_filters( 'ampforwp_framework_get_post_pagination_link', $link, $next );

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}

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$output .= $r['after'];

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}

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}

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/**

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* Filters the HTML output of page links for paginated posts.

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* @param string $output HTML output of paginated posts' page links.

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* @param array $args An array of arguments.

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$html = apply_filters( 'ampforwp_framework_get_post_pagination', $output, $args );

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if ( $r['echo'] ) {

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echo ($html);

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}

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return $html;

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}

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/**

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* Helper function for ampforwp_framework_get_post_pagination().

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* @access private

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* @global WP_Rewrite $wp_rewrite

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* @param int $i Page number.

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* @return string Link.

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function ampforwp_framework_get_post_paginated_link( $i, $args = '' ) {

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global $wp_rewrite;

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$post = get_post();

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$query_args = array();

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if ( isset($args) ) {

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$class = "class='".esc_attr($args)."'";

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}

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if ( 1 == $i ) {

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$url = get_permalink();

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} else {

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if ( '' == get_option('permalink_structure') || in_array($post->post_status, array('draft', 'pending')) )

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$url = add_query_arg( 'page', $i, get_permalink() );

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elseif ( 'page' == get_option('show_on_front') && get_option('page_on_front') == $post->ID )

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$url = trailingslashit(get_permalink()) . user_trailingslashit("$wp_rewrite->pagination_base/" . $i, 'single_paged');

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else

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$url = trailingslashit(get_permalink()) . user_trailingslashit($i, 'single_paged');

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}

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if ( is_preview() ) {

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if ( ( 'draft' !== $post->post_status ) && isset( $_GET['preview_id'], $_GET['preview_nonce'] ) ) {

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$query_args['preview_id'] = wp_unslash( $_GET['preview_id'] );

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$query_args['preview_nonce'] = wp_unslash( $_GET['preview_nonce'] );

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}

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$url = get_preview_post_link( $post, $query_args, $url );

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}

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return '<a href="' . esc_url(trailingslashit( $url) ) . '?amp" ' . $class . '>';

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}

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add_filter('ampforwp_modify_rel_canonical','amp_paginated_post_modify_amphtml');

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function amp_paginated_post_modify_amphtml($url) {

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$mob_pres_link = false;

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if(function_exists('ampforwp_mobile_redirect_preseve_link')){

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$mob_pres_link = ampforwp_mobile_redirect_preseve_link();

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}

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if( is_single() && (false == ampforwp_get_setting('ampforwp-amp-takeover') && $mob_pres_link == false )){

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$post_paginated_page='';

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$post_paginated_page = get_query_var('page');

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if($post_paginated_page){

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$url = get_permalink();

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$new_url = $url."$post_paginated_page/?amp";

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return esc_url($new_url);

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}

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}

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return $url;

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}

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//add_action('amp_post_template_head','amp_paginated_post_modify_canonical',9);

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function amp_paginated_post_modify_canonical(){

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if(is_single()){

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$post_paginated_page='';

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$post_paginated_page = get_query_var('page');

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if($post_paginated_page){

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remove_action( 'amp_post_template_head', 'AMPforWP\\AMPVendor\\amp_post_template_add_canonical' );

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add_action('amp_post_template_head','amp_paginated_post_rel_canonical');

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}

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}

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}

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function amp_paginated_post_rel_canonical(){

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$post_paginated_page='';

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$new_canonical_url = '';

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global $post;

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$current_post_id = $post->ID;

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$new_canonical_url = get_permalink($current_post_id);

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$new_canonical_url = trailingslashit($new_canonical_url);

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$post_paginated_page = get_query_var('page');

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if($post_paginated_page){?>

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}

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