From a989374f143a885920e640296902d5bbf4fe8086 Mon Sep 17 00:00:00 2001
From: cel <cel@f/6sQ6d2CMxRUhLpspgGIulDxDCwYD7DzFzPNr7u5AU=.ed25519>
Date: Fri, 8 Nov 2019 14:39:07 -1000
Subject: Add dualMarkdownPreview option

---
 README.md         |  1 +
 lib/render-msg.js | 12 ++++++++++++
 lib/render.js     | 10 ++++++++--
 lib/serve.js      |  2 ++
 package.json      |  1 +
 5 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 9f108ac..deb1fa2 100644
--- a/README.md
+++ b/README.md
@@ -134,6 +134,7 @@ To make config options persistent, set them in `~/.ssb/config`, e.g.:
 - `scriptDir: name of directory in patchfoo's directory (as set by `patchfoo.dir` config option above) to use for user scripts. default: `"script"`.
 - `draftsDir: name of directory in patchfoo's directory (as set by `patchfoo.dir` config option above) to use for message draft data. default: `"drafts"`.
 - `newLimit: limit of messages to show on `/new` page. Default: 500. Overridable with query string parameter `limit=...`.
+- `dualMarkdownPreview`: Preview messages in composer in multiple SSB markdown implementations, `ssb-marked` and `ssb-markdown` >= 3. Overridable with query string parameter `dualMd=1`.
 
 ## TODO
 
diff --git a/lib/render-msg.js b/lib/render-msg.js
index 475965a..a29a21b 100644
--- a/lib/render-msg.js
+++ b/lib/render-msg.js
@@ -368,6 +368,18 @@ RenderMsg.prototype.encrypted = function (cb) {
 RenderMsg.prototype.markdown = function (cb) {
   if (this.opts.markdownSource)
     return this.markdownSource(this.c.text, this.c.mentions)
+
+  if (this.opts.dualMarkdown) {
+    var self = this
+    return h('table', {style: 'width: 100%'}, h('tr', [
+      h('td', {style: 'width: 50%'},
+        {innerHTML: this.render.markdown(this.c.text, this.c.mentions)}),
+      h('td', {style: 'width: 50%'},
+        {innerHTML: this.render.markdown(this.c.text, this.c.mentions,
+          {ssbcMd: true})})
+    ])).outerHTML
+  }
+
   return this.render.markdown(this.c.text, this.c.mentions)
 }
 
diff --git a/lib/render.js b/lib/render.js
index f3dcfe0..fc2407e 100644
--- a/lib/render.js
+++ b/lib/render.js
@@ -12,6 +12,7 @@ var u = require('./util')
 var multicb = require('multicb')
 var RenderMsg = require('./render-msg')
 var Highlight = require('highlight.js')
+var md = require('ssb-markdown')
 
 module.exports = Render
 
@@ -166,8 +167,9 @@ function fixSymbols(str) {
 }
 */
 
-Render.prototype.markdown = function (text, mentions) {
+Render.prototype.markdown = function (text, mentions, opts) {
   if (!text) return ''
+  var ssbcMd = opts && opts.ssbcMd
   var mentionsObj = this._mentions = {}
   var mentionsByLink = this._mentionsByLink = {}
   if (Array.isArray(mentions)) mentions.forEach(function (link) {
@@ -184,7 +186,11 @@ Render.prototype.markdown = function (text, mentions) {
           '?unbox=' + link.query.unbox.replace(/\s/g, '+') : '') +
         (link.key ? '#' + link.key : '')] = link
   })
-  var out = marked(String(text), this.markedOpts)
+  var self = this
+  var out = ssbcMd ? md.block(String(text), {
+    toUrl: function (ref) { return self.toUrl(ref) },
+    imageLink: function (ref) { return self.imageUrl(ref) }
+  }) : marked(String(text), this.markedOpts)
   delete this._mentions
   delete this._mentionsByLink
   return out //fixSymbols(out)
diff --git a/lib/serve.js b/lib/serve.js
index 7e0ee26..cd63905 100644
--- a/lib/serve.js
+++ b/lib/serve.js
@@ -3968,6 +3968,8 @@ Serve.prototype.composer = function (opts, cb) {
         self.app.unboxMessages(),
         self.app.render.renderFeeds({
           raw: raw,
+          dualMarkdown: self.query.dualMd != null ? self.query.dualMd :
+            self.conf.dualMarkdownPreview,
           filter: self.query.filter,
         }),
         pull.drain(function (el) {
diff --git a/package.json b/package.json
index 4857a84..e6a5a42 100644
--- a/package.json
+++ b/package.json
@@ -33,6 +33,7 @@
     "pull-stream": "^3.5.0",
     "pull-utf8-decoder": "^1.0.2",
     "ssb-git": "^1.1.0",
+    "ssb-markdown": "^6.0.0",
     "ssb-marked": "^0.7.1",
     "ssb-mentions": "^0.5.0",
     "ssb-npm-registry": "^1.8.0",
-- 
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