git ssb

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var nest = require('depnest')
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var h = require('mutant/h')
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var isString= require('lodash/isString')
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var maxBy= require('lodash/maxBy')
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var marksum = require('markdown-summary')
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var markdown = require('ssb-markdown')
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var ref = require('ssb-ref')
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var htmlEscape = require('html-escape')
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function renderEmoji (emoji, url) {
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  if (!url) return ':' + emoji + ':'
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  return `
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    <img
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      src="${htmlEscape(url)}"
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      alt=":${htmlEscape(emoji)}:"
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      title=":${htmlEscape(emoji)}:"
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      class="emoji"
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    >
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  `
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}
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exports.gives = nest('app.html.blogCard', true)
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exports.needs = nest({
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  'keys.sync.id': 'first',
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  'history.sync.push': 'first',
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  'about.obs.name': 'first',
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  'about.html.avatar': 'first',
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  'translations.sync.strings': 'first',
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  'unread.sync.isUnread': 'first',
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  // 'message.html.markdown': 'first',
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  'message.html.timeago': 'first',
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  'blob.sync.url': 'first',
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  'emoji.sync.url': 'first'
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})
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exports.create = function (api) {
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  //render markdown, but don't support patchwork@2 style mentions or custom emoji right now.
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  function render (source) {
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    return markdown.block(source, {
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      emoji: (emoji) => {
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        return renderEmoji(emoji, api.emoji.sync.url(emoji))
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      },
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      toUrl: (id) => {
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        if (ref.isBlob(id)) return api.blob.sync.url(id)
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        return id
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      },
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      imageLink: (id) => id
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    })
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  }
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  //render the icon for a blog.
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  //it would be more depjecty to split this
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  //into two methods, one in a private plugin
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  //one in a channel plugin
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  function blogIcon (msg) {
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    if(msg.value.private) {
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      const myId = api.keys.sync.id()
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      return msg.value.content.recps
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        .map(link => isString(link) ? link : link.link)
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        .filter(link => link !== myId)
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        .map(link => api.about.html.avatar)
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    }
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    else if(msg.value.content.channel)
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      return '#'+msg.value.content.channel
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  }
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  // REFACTOR: move this to a template?
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  function buildRecipientNames (blog) {
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    const myId = api.keys.sync.id()
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    return blog.value.content.recps
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      .map(link => isString(link) ? link : link.link)
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      .filter(link => link !== myId)
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      .map(api.about.obs.name)
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  }
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  return nest('app.html.blogCard', (blog, opts = {}) => {
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    var strings = api.translations.sync.strings()
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    if(!blog.value) return
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    if('string' !== typeof blog.value.content.text) return
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    const lastReply = blog.replies && maxBy(blog.replies, r => r.timestamp)
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    const goToBlog = () => api.history.sync.push(blog)
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    const onClick = opts.onClick || goToBlog
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    const id = `${blog.key.replace(/[^a-z0-9]/gi, '')}` //-${JSON.stringify(opts)}`
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    // id is only here to help morphdom morph accurately
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    const { content, author } = blog.value
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    var img = h('Thumbnail')
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    var m = /\!\[[^]+\]\(([^\)]+)\)/.exec(marksum.image(content.text))
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    if(m) {
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      //Hey this works! fit an image into a specific size (see blog-card.mcss)
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      //centered, and scaled to fit the square (works with both landscape and portrait!)
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      //This is functional css not opinionated css, so all embedded.
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      img.style = 'background-image: url("'+api.blob.sync.url(m[1])+'"); background-position:center; background-size: cover;'
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    }
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    const title = render(marksum.title(content.text))
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    const summary = render(marksum.summary(content.text))
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    const className = blog.unread ? '-unread': ''
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    return h('BlogCard', { id, className }, [
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      h('div.context', [
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        api.about.html.avatar(author, 'tiny'),
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        h('div.name', api.about.obs.name(author)),
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        api.message.html.timeago(blog)
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      ]),
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      h('div.content', {'ev-click': onClick}, [
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        img,
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        h('div.text', [
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          h('h2', {innerHTML: title}),
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          content.channel
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            ? h('Button -channel', '#'+content.channel)
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            : '',
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          h('div.summary', {innerHTML: summary})
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        ])
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      ])
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    ])
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  })
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}
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