From fdf0eab97e98a15fde92f5c06c3e6b23cc4ae6da Mon Sep 17 00:00:00 2001
From: Jocs <luoran1988@126.com>
Date: Mon, 12 Feb 2018 00:05:41 +0800
Subject: [PATCH] feat: add util, transform tokens to markdown text

---
 src/editor/parser/StateRender.js |  5 ++--
 src/editor/parser/parse.js       | 39 ++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/src/editor/parser/StateRender.js b/src/editor/parser/StateRender.js
index 7993297e..64d37aaa 100644
--- a/src/editor/parser/StateRender.js
+++ b/src/editor/parser/StateRender.js
@@ -1,7 +1,7 @@
 import { LOWERCASE_TAGS, CLASS_OR_ID } from '../config'
 import { conflict, isLengthEven, isEven, getIdWithoutSet, loadImage, getImageSrc } from '../utils'
 import { insertAfter, operateClassName } from '../utils/domManipulate.js'
-import { tokenizer } from './parse'
+import { tokenizer, generator } from './parse'
 import { validEmoji } from '../emojis'
 
 const snabbdom = require('snabbdom')
@@ -115,7 +115,8 @@ class StateRender {
 
         return h(blockSelector, data, block.children.map(child => renderBlock(child)))
       } else {
-        console.log(tokenizer(block.text))
+        const tokens = tokenizer(block.text)
+        console.log(generator(tokens))
         let children = block.text
           ? tokenizer(block.text).reduce((acc, token) => {
             const chunk = this[token.type](h, cursor, block, token)
diff --git a/src/editor/parser/parse.js b/src/editor/parser/parse.js
index eedbb239..763b7d4e 100644
--- a/src/editor/parser/parse.js
+++ b/src/editor/parser/parse.js
@@ -182,6 +182,45 @@ export const tokenizer = src => {
   return tokenizerFac(src, beginRules, inlineRules, 0)
 }
 
+// transform `tokens` to text
+export const generator = tokens => {
+  let result = ''
+  for (const token of tokens) {
+    switch (token.type) {
+      case 'hr':
+      case 'header':
+      case 'code_fense':
+      case 'backlash':
+        result += token.marker + token.content
+        break
+      case 'text':
+        result += token.content
+        break
+      case 'em':
+      case 'del':
+      case 'strong':
+        result += `${token.marker}${generator(token.children)}${token.backlash}${token.marker}`
+        break
+      case 'emoji':
+      case 'inline_code':
+        result += `${token.marker}${token.content}${token.backlash}${token.marker}`
+        break
+      case 'link':
+        result += `[${generator(token.children)}${token.backlash.first}](${token.href}${token.backlash.second})`
+        break
+      case 'image':
+        result += `![${generator(token.children)}${token.backlash.first}](${token.src}${token.backlash.second})`
+        break
+      case 'auto_link':
+        result += token.href
+        break
+      default:
+        throw new Error(`unhandle token type: ${token.type}`)
+    }
+  }
+  return result
+}
+
 /**
  * [{
  *   type: 'hr',