<?php
if (!defined('ABSPATH')) {die;} // Cannot access directly.
function _the_head() {
    _keywords();
    _description();
}
add_action('wp_head', '_the_head',1);
function _get_delimiter()
{
	return _hua('connector') ? _hua('connector') : '-';
}

function _title($echo = true)
{
	global $paged, $post;
    $html = '';
    $t    = trim(wp_title('', false));
    if ($t) {
        $html .= $t . _get_delimiter();
    }
    if (get_query_var('page')) {
        $html .= '第' . get_query_var('page') . '页' . _get_delimiter();
    }
    $html .=  get_bloginfo('name');

    $seo_opt  = _hua('seo');
    if (is_home()) {
        $seo_intit = (!empty($seo_opt['web_title'])) ? $seo_opt['web_title'] : 'Huatheme.com企业主题开发_专注于wordpress高端企业主题模板制作';
		if ($seo_intit) {
			$html = $seo_intit;
			if ($paged > 1) {
				$html .= _get_delimiter() . '最新发布';
			}
		} else {
			if ($paged > 1) {
				$html .= _get_delimiter() . '最新发布';
			} else if (get_bloginfo('name')) {
				$html .= _get_delimiter() . get_bloginfo('name');
			}
		}
	}
    
    if (is_category()) {
        $cat_ID  = get_query_var('cat');
        $seo_str = get_term_meta($cat_ID, 'seo-title', true);
        $cat_tit = ($seo_str) ? $seo_str : _get_tax_meta($cat_ID, 'title');
        if ($cat_tit) {
            $html = $cat_tit;
            $html .= _get_delimiter() . get_bloginfo('name');
        }
    } elseif (is_tag()) {
        $tagName   = single_tag_title('', false);
        $tagObject = get_term_by('name', $tagName, 'post_tag');
        $tagID     = $tagObject->term_id;
        $seo_str   = get_term_meta($tagID, 'seo-title', true);
        $html      = ($seo_str) ? trim($seo_str) : $tagName;
        $html .= _get_delimiter() . get_bloginfo('name');
    } elseif (is_singular() && get_post_meta($post->ID, 'post_titie_s', true)) {
        $html = get_post_meta($post->ID, 'post_titie', true);
    }

    if ($paged > 1) {
        $html .= _get_delimiter() . '第' . $paged . '页';
    }

    return $html;
}
/**
 * @return   [type]                   [description]
 */
function _keywords() {
    global $s, $post;
    $keywords = '';
    if (is_singular()) {
        if (get_the_tags($post->ID)) {
            foreach (get_the_tags($post->ID) as $tag) {
                $keywords .= $tag->name . ',';
            }

        }
        foreach (get_the_category($post->ID) as $category) {
            $keywords .= ' ';
        }

        if (get_post_meta($post->ID, 'post_keywords_s', true)) {
            $the = trim(get_post_meta($post->ID, 'keywords', true));
            if ($the) {
                $keywords = $the;
            }
        } else {
            $keywords = substr_replace($keywords, '', -2);
        }

    } elseif (is_home()) {
        $seo_opt  = _hua('seo');
        $keywords = (!empty($seo_opt['web_keywords'])) ? $seo_opt['web_keywords'] : '暂无关键词，huatheme';
    } elseif (is_tag()) {
        $tagName   = single_tag_title('', false);
        $tagObject = get_term_by('name', $tagName, 'post_tag');
        $tagID     = $tagObject->term_id;
        $seo_str   = get_term_meta($tagID, 'seo-keywords', true);
        $keywords  = ($seo_str) ? trim($seo_str) : $tagName;
    } elseif (is_category()) {
        global $wp_query;
        $cat_ID   = get_query_var('cat');
        $seo_str  = get_term_meta($cat_ID, 'seo-keywords', true);
        $keywords = ($seo_str) ? trim($seo_str) : trim(wp_title('', false));
    } elseif (is_search()) {
        $keywords = esc_html($s, 1);
    } else {
        $keywords = trim(wp_title('', false));
    }
    if ($keywords) {
        echo "<meta name=\"keywords\" content=\"$keywords\">\n";
    }
}

/**
 * @return   [type]                   [description]
 */
function _description() {
    global $s, $post;
    $description = '';
    $blog_name   = get_bloginfo('name');
    if (is_singular()) {
        if (!empty($post->post_excerpt)) {
            $text = $post->post_excerpt;
        } else {
            $text = $post->post_content;
        }
        $description = trim(str_replace(array("\r\n", "\r", "\n", "　", " "), " ", str_replace("\"", "'", strip_tags($text))));
        $description = substr_ext(strip_tags(strip_shortcodes($description)), 0, 140, 'utf-8', '...');
        if (!($description)) {
            $description = $blog_name . "-" . trim(wp_title('', false));
        }
        if (get_post_meta($post->ID, 'post_description_s', true)) {
            $the = trim(get_post_meta($post->ID, 'description', true));
            if ($the) {
                $description = $the;
            }
        }

    } elseif (is_home()) {
        $seo_opt     = _hua('seo');
        $description = (!empty($seo_opt['web_description'])) ? $seo_opt['web_description'] : 'wordpress企业主题开发_专注于WordPress高端企业主题制作';
    } elseif (is_tag()) {
        $tagName     = single_tag_title('', false);
        $tagObject   = get_term_by('name', $tagName, 'post_tag');
        $tagID       = $tagObject->term_id;
        $seo_str     = get_term_meta($tagID, 'seo-description', true);
        $description = ($seo_str) ? trim($seo_str) : trim(wp_title('', false));
    } elseif (is_category()) {
        global $wp_query;
        $cat_ID      = get_query_var('cat');
        $seo_str     = get_term_meta($cat_ID, 'seo-description', true);
        $description = ($seo_str) ? trim($seo_str) : str_replace(array("<p>","","</p>", "\r", "\n"),"",category_description());
    } elseif (is_archive()) {
        $description = $blog_name . "-" . trim(wp_title('', false));
    } elseif (is_search()) {
        $description = $blog_name . ": '" . esc_html($s, 1) . "' " . __('的搜索結果', 'haoui');
    } elseif (is_tag()) {

    } else {
        $description = $blog_name . "'" . trim(wp_title('', false)) . "'";
    }
    $description = mb_substr($description, 0, _get_description_max_length(), 'utf-8');
    echo "<meta name=\"description\" content=\"$description\">\n";
}

function substr_ext($str, $start = 0, $length, $charset = 'utf-8', $suffix = '') {
    if (function_exists('mb_substr')) {
        return mb_substr($str, $start, $length, $charset) . $suffix;
    }
    if (function_exists('iconv_substr')) {
        return iconv_substr($str, $start, $length, $charset) . $suffix;
    }
    $re['utf-8']  = '/[
-]|[?-?][?-?]|[?-?][?-?]{2}|[?-?][?-?]{3}/';
    $re['gb2312'] = '/[
-]|[?-?][?-?]/';
    $re['gbk']    = '/[
-]|[?-?][@-?]/';
    $re['big5']   = '/[
-]|[?-?]([@-~]|?-?])/';
    preg_match_all($re[$charset], $str, $match);
    $slice = join('', array_slice($match[0], $start, $length));
    return $slice . $suffix;
}
function _get_description_max_length() {
    return 200;
}