hexo-theme-volantis
Version:
Elegant and powerful theme for Hexo.
43 lines (42 loc) • 1.59 kB
JavaScript
function addImagePreviewIfNoNoindex(robotsContent) {
// 检查是否不包含 'noindex' 且尚未包含 max-image-preview
if (!robotsContent.toLowerCase().includes('noindex') &&
!robotsContent.toLowerCase().includes('max-image-preview')) {
// 处理行尾标点，确保添加格式正确
const trimmed = robotsContent.trim();
const needsSemicolon = trimmed && !trimmed.endsWith(',');
return `${robotsContent}${needsSemicolon ? ',' : ''} max-image-preview:large`;
}
return robotsContent;
}
hexo.extend.helper.register('generate_seo', function (theme, page) {
const hexo = this;
let robots_content = "";
if (page.robots) {
robots_content = page.robots
} else if (theme.seo && theme.seo.robots) {
if (hexo.is_home()) {
if (page.prev == 0) {
robots_content = theme.seo.robots.home_first_page
} else {
robots_content = theme.seo.robots.home_other_pages
}
} else if (hexo.is_archive()) {
robots_content = theme.seo.robots.archive
} else if (hexo.is_category()) {
robots_content = theme.seo.robots.category
} else if (hexo.is_tag()) {
robots_content = theme.seo.robots.tag
}
}
const IS_BACKUP = process.env.IS_BACKUP === 'true';
if (IS_BACKUP) {
robots_content = 'noindex, nofollow, noarchive';
}
if (robots_content) {
robots_content = addImagePreviewIfNoNoindex(robots_content)
return `<meta name="robots" content="${robots_content}">`
}else{
return `<meta name="robots" content="index,follow,max-image-preview:large">`
}
});