Add drafts feature

1 files changed, 62 insertions, 0 deletions

diff --git a/lib/app.js b/lib/app.js
index e7cca83..1ca864e 100644
--- a/lib/app.js
+++ b/lib/app.js
@@ -22,6 +22,8 @@ var SsbNpmRegistry = require('ssb-npm-registry')
 var os = require('os')
 var path = require('path')
 var fs = require('fs')
+var mkdirp = require('mkdirp')
+var Base64URL = require('base64-url')
 
 var zeros = new Buffer(24); zeros.fill(0)
 
@@ -50,6 +52,7 @@ function App(sbot, config) {
   this.baseUrl = 'http://' + host1 + ':' + this.port
   this.dir = path.join(config.path, conf.dir || 'patchfoo')
   this.scriptDir = path.join(this.dir, conf.scriptDir || 'script')
+  this.draftsDir = path.join(this.dir, conf.draftsDir || 'drafts')
 
   var base = conf.base || '/'
   this.opts = {
@@ -103,6 +106,7 @@ function App(sbot, config) {
     'search',
     'live',
     'compose',
+    'drafts',
     'emojis',
     'self',
     'searchbox'
@@ -1390,3 +1394,61 @@ App.prototype.getScript = function (filepath, cb) {
     cb(null, module)
   })
 }
+
+function writeNewFile(dir, data, tries, cb) {
+  var id = Base64URL.encode(crypto.randomBytes(8))
+  fs.writeFile(path.join(dir, id), data, {flag: 'wx'}, function (err) {
+    if (err && err.code === 'EEXIST' && tries > 0) return writeNewFile(dir, data, tries-1, cb)
+    if (err) return cb(err)
+    cb(null, id)
+  })
+}
+
+App.prototype.saveDraft = function (id, url, form, content, cb) {
+  var self = this
+  if (!self.madeDraftsDir) {
+    mkdirp.sync(self.draftsDir)
+    self.madeDraftsDir = true
+  }
+  if (/[\/:\\]/.test(id)) return cb(new Error('draft id cannot contain path seperators'))
+  var draft = {
+    url: url,
+    form: form,
+    content: content
+  }
+  var data = JSON.stringify(draft)
+  if (id) fs.writeFile(path.join(self.draftsDir, id), data, cb)
+  else writeNewFile(self.draftsDir, data, 32, cb)
+}
+
+App.prototype.getDraft = function (id, cb) {
+  var self = this
+  fs.readFile(path.join(self.draftsDir, id), 'utf8', function (err, data) {
+    if (err) return cb(err)
+    var draft
+    try { draft = JSON.parse(data) }
+    catch(e) { return cb(e) }
+    draft.id = id
+    cb(null, draft)
+  })
+}
+
+App.prototype.discardDraft = function (id, cb) {
+  fs.unlink(path.join(this.draftsDir, id), cb)
+}
+
+App.prototype.listDrafts = function () {
+  var self = this
+  return u.readNext(function (cb) {
+    fs.readdir(self.draftsDir, function (err, files) {
+      if (err && err.code === 'ENOENT') return cb(null, pull.empty())
+      if (err) return cb(err)
+      cb(null, pull(
+        pull.values(files),
+        pull.asyncMap(function (name, cb) {
+          self.getDraft(name, cb)
+        })
+      ))
+    })
+  })
+}