gayzz2md.js

class MdFormatter {
  renderNode (node) {
    if (typeof node === 'string') {
      return node
    } else if (node instanceof Array) {
      let result = ''
      node.forEach((item) => {
        result += this.renderNode(item)
      })
      return result
    }

    let title, url, text
    switch (node.type) {
      case 'code':
        text = this.renderNode(node.children)
        return ` \`${text}\` `

      case 'strong':
        text = this.renderNode(node.children)
        return ` **${text}** `

      case 'url':
        return node.children

      case 'image':
        const imageUrl = node.unit.content
        return `![](${imageUrl})`
      case 'gyazo':
        const imageUrl = node.unit.content
        return `![](${imageUrl}/raw)`
      case 'imageLink':
        return `[![](${node.unit.image})](${node.unit.link})`
      case 'urlLink':
        url = node.unit.link
        title = node.unit.title
        if (title === '') {
          title = url
        }
        return `[${title}](${url})`

      case 'icon':
        title = node.unit.title
        return ` *${title}* `

      case 'link':
        title = node.unit.content
        return title
        url = this._baseUrl + title
        return `<${url}|${title}>`

      case 'hashTag':
        return ''
        url = this._baseUrl + node.unit.content
        title = node.children
        return `<${url}|${title}>`

      case 'quote':
        text = this.renderNode(node.children)
        return node.unit.tag + text

      case 'indent':
        text = this.renderNode(node.children)
        const indentSize = node.unit.tag.length
        let pads = ''
        for (let i = 0; i < indentSize; i++) {
          pads += ' '
        }
        return pads + '- ' + text
    }
    return this.renderNode(node.children)
  }

  set baseUrl (baseUrl) {
    this._baseUrl = baseUrl
  }

  render (text) {
    window.fetch('/kmc/祇園祭2016.parsed.json', {credentials: 'include'}).then(r => r.json())
      .then((res) => {
        console.log(res.map((node) => {
          return this.renderNode(node)
        }).join('\n'))
      })
  }
}

(new MdFormatter()).render()