// twitter card markup https://developer.twitter.com/en/docs/tweets/optimize-with-cards/overview/markup.html

export const schema = new Map([
  ['twitter:card', { entry: 'twitter_card', name: 'card', type: 'string' }],
  ['twitter:url', { entry: 'twitter_card', name: 'url', type: 'url' }],
  ['twitter:site', { entry: 'twitter_card', name: 'site', type: 'string' }],
  ['twitter:creator', { entry: 'twitter_card', name: 'creator', type: 'string' }],
  ['twitter:creator:id', { entry: 'twitter_card', name: 'creator_id', type: 'string' }],
  ['twitter:title', { entry: 'twitter_card', name: 'title', type: 'string' }],
  ['twitter:description', { entry: 'twitter_card', name: 'description', type: 'string' }],
  ['twitter:image', { entry: 'twitter_card', name: 'url', parent: 'images', type: 'url' }],
  ['twitter:image:src', { entry: 'twitter_card', name: 'url', parent: 'images', type: 'url' }],
  ['twitter:image:alt', { entry: 'twitter_card', name: 'alt', parent: 'images', type: 'string' }],
  ['twitter:player', { entry: 'twitter_card', name: 'url', parent: 'players', type: 'string' }],
  ['twitter:player:stream', { entry: 'twitter_card', name: 'stream', parent: 'players', type: 'string' }],
  ['twitter:player:width', { entry: 'twitter_card', name: 'width', parent: 'players', type: 'number' }],
  ['twitter:player:height', { entry: 'twitter_card', name: 'height', parent: 'players', type: 'number' }],
  ['twitter:app:id:iphone', { entry: 'twitter_card', name: 'id', parent: 'apps', category: 'iphone', type: 'string' }],
  ['twitter:app:name:iphone', { entry: 'twitter_card', name: 'name', parent: 'apps', category: 'iphone', type: 'string' }],
  ['twitter:app:url:iphone', { entry: 'twitter_card', name: 'url', parent: 'apps', category: 'iphone', type: 'string' }],
  ['twitter:app:id:ipad', { entry: 'twitter_card', name: 'id', parent: 'apps', category: 'ipad', type: 'string' }],
  ['twitter:app:name:ipad', { entry: 'twitter_card', name: 'name', parent: 'apps', category: 'ipad', type: 'string' }],
  ['twitter:app:url:ipad', { entry: 'twitter_card', name: 'url', parent: 'apps', category: 'ipad', type: 'string' }],
  ['twitter:app:id:googleplay', { entry: 'twitter_card', name: 'id', parent: 'apps', category: 'googleplay', type: 'string' }],
  ['twitter:app:name:googleplay', { entry: 'twitter_card', name: 'name', parent: 'apps', category: 'googleplay', type: 'string' }],
  ['twitter:app:url:googleplay', { entry: 'twitter_card', name: 'url', parent: 'apps', category: 'googleplay', type: 'string' }],
  ['og:title', { entry: 'open_graph', name: 'title', type: 'string' }],
  ['og:type', { entry: 'open_graph', name: 'type', type: 'string' }],
  ['og:image', { entry: 'open_graph', name: 'url', parent: 'images', type: 'url' }],
  ['og:image:url', { entry: 'open_graph', name: 'url', parent: 'images', type: 'url' }],
  ['og:image:secure_url', { entry: 'open_graph', name: 'secure_url', parent: 'images', type: 'url' }],
  ['og:image:width', { entry: 'open_graph', name: 'width', parent: 'images', type: 'number' }],
  ['og:image:height', { entry: 'open_graph', name: 'height', parent: 'images', type: 'number' }],
  ['og:image:type', { entry: 'open_graph', name: 'type', parent: 'images', type: 'string' }],
  ['og:url', { entry: 'open_graph', name: 'url', type: 'url' }],
  ['og:audio', { entry: 'open_graph', name: 'url', parent: 'audio', type: 'url' }],
  ['og:audio:url', { entry: 'open_graph', name: 'url', parent: 'audio', type: 'url' }],
  ['og:audio:secure_url', { entry: 'open_graph', name: 'secure_url', parent: 'audio', type: 'url' }],
  ['og:audio:type', { entry: 'open_graph', name: 'type', parent: 'audio', type: 'string' }],
  ['og:description', { entry: 'open_graph', name: 'description', type: 'string' }],
  ['og:determiner', { entry: 'open_graph', name: 'determiner', type: 'string' }],
  ['og:locale', { entry: 'open_graph', name: 'locale', type: 'string' }],
  ['og:locale:alternate', { entry: 'open_graph', name: 'locale_alt', type: 'string' }],
  ['og:site_name', { entry: 'open_graph', name: 'site_name', type: 'string' }],
  ['og:video', { entry: 'open_graph', name: 'url', parent: 'videos', type: 'url' }],
  ['og:video:url', { entry: 'open_graph', name: 'url', parent: 'videos', type: 'url' }],
  ['og:video:secure_url', { entry: 'open_graph', name: 'secure_url', parent: 'videos', type: 'string' }],
  ['og:video:width', { entry: 'open_graph', name: 'width', parent: 'videos', type: 'number' }],
  ['og:video:height', { entry: 'open_graph', name: 'height', parent: 'videos', type: 'number' }],
  ['og:video:type', { entry: 'open_graph', name: 'type', parent: 'videos', type: 'string' }],
  ['og:video:tag', { entry: 'open_graph', name: 'tag', parent: 'videos', type: 'string' }],
  ['article:published_time', { entry: 'open_graph', name: 'published_time', parent: 'articles', type: 'string' }],
  ['article:modified_time', { entry: 'open_graph', name: 'modified_time', parent: 'articles', type: 'string' }],
  ['article:expiration_time', { entry: 'open_graph', name: 'expiration_time', parent: 'articles', type: 'string' }],
  ['article:author', { entry: 'open_graph', name: 'author', parent: 'articles', type: 'string' }],
  ['article:section', { entry: 'open_graph', name: 'section', parent: 'articles', type: 'string' }],
  ['article:tag', { entry: 'open_graph', name: 'tag', parent: 'articles', type: 'string' }],
  // oEmbed: is prepended to these fields so that it does not interfere with root title or description
  ['oEmbed:type', { entry: 'oEmbed', name: 'type', type: 'string' }],
  ['oEmbed:version', { entry: 'oEmbed', name: 'version', type: 'string' }],
  ['oEmbed:title', { entry: 'oEmbed', name: 'title', type: 'string' }],
  ['oEmbed:author_name', { entry: 'oEmbed', name: 'author_name', type: 'string' }],
  ['oEmbed:author_url', { entry: 'oEmbed', name: 'author_url', type: 'url' }],
  ['oEmbed:provider_name', { entry: 'oEmbed', name: 'provider_name', type: 'string' }],
  ['oEmbed:provider_url', { entry: 'oEmbed', name: 'provider_url', type: 'string' }],
  ['oEmbed:cache_age', { entry: 'oEmbed', name: 'cache_age', type: 'string' }],
  ['oEmbed:thumbnail_url', { entry: 'oEmbed', name: 'url', parent: 'thumbnails', type: 'url' }],
  ['oEmbed:thumbnail_width', { entry: 'oEmbed', name: 'width', parent: 'thumbnails', type: 'number' }],
  ['oEmbed:thumbnail_height', { entry: 'oEmbed', name: 'height', parent: 'thumbnails', type: 'number' }],
  ['oEmbed:url', { entry: 'oEmbed', name: 'url', type: 'url' }],
  ['oEmbed:html', { entry: 'oEmbed', name: 'html', type: 'string' }],
  ['oEmbed:width', { entry: 'oEmbed', name: 'width', type: 'number' }],
  ['oEmbed:height', { entry: 'oEmbed', name: 'height', type: 'number' }]
])

export const keys = Array.from(schema.keys())