Integrate v1 captcha into current QR code.

src/General/Config.coffee

@@ -463,6 +463,11 @@ Config =
         'Use the non-Javascript fallback captcha in the QR even if Javascript is enabled.'
         1
       ]
+      'Use Recaptcha v1': [
+        false
+        'Use the old version of Recaptcha before the introduction of the checkbox.'
+        1
+      ]
       'Auto-load captcha': [
         false
         'Automatically load the captcha in the QR even if your post is empty.'

src/Posting/Captcha.v1.coffee

@@ -44,14 +44,31 @@ Captcha.v1 =
 
     @beforeSetup()
     @afterSetup() # reCAPTCHA might have loaded before the QR.
+
+  cb:
+    focus: -> QR.captcha.setup false, true
+
   beforeSetup: ->
     {img, input} = @nodes
     img.parentNode.hidden = true
     input.value = ''
     input.placeholder = 'Focus to load reCAPTCHA'
     @count()
-    $.on input, 'focus', @setup
+    $.on input, 'focus click', @cb.focus
-  setup: ->
+
+  needed: ->
+    captchaCount = @captchas.length
+    captchaCount++ if QR.req
+    postsCount = QR.posts.length
+    postsCount = 0 if postsCount is 1 and !Conf['Auto-load captcha'] and !QR.posts[0].com and !QR.posts[0].file
+    captchaCount < postsCount
+
+  onNewPost: ->
+
+  onPostChange: ->
+
+  setup: (focus, force) ->
+    return unless @isEnabled and (@needed() or force)
     $.globalEval '''
       (function() {
         var captchaContainer = document.getElementById("captchaContainer");
@@ -66,6 +83,8 @@ Captcha.v1 =
         setup();
       })()
     '''
+    @nodes.input.focus() if focus
+
   afterSetup: ->
     return unless challenge = $.id 'recaptcha_challenge_field_holder'
     return if challenge is QR.captcha.nodes.challenge
@@ -79,7 +98,7 @@ Captcha.v1 =
     img.parentNode.hidden = false
     input.placeholder = 'Verification'
     QR.captcha.count()
-    $.off input, 'focus', QR.captcha.setup
+    $.off input, 'focus click', QR.captcha.cb.focus
 
     QR.captcha.nodes.challenge = challenge
     new MutationObserver(QR.captcha.load.bind QR.captcha).observe challenge,
@@ -91,11 +110,13 @@ Captcha.v1 =
     if QR.nodes.el.getBoundingClientRect().bottom > doc.clientHeight
       QR.nodes.el.style.top    = null
       QR.nodes.el.style.bottom = '0px'
+
   destroy: ->
+    return unless @isEnabled
     $.globalEval 'Recaptcha.destroy()'
     @beforeSetup()
 
-  sync: (captchas) ->
+  sync: (captchas=[]) ->
     QR.captcha.captchas = captchas
     QR.captcha.count()
 
@@ -109,10 +130,6 @@ Captcha.v1 =
       challenge   = @nodes.img.alt
       if response = @nodes.input.value
         if Conf['Auto-load captcha'] then @reload() else @destroy()
-    # Duplicate one-word captchas.
-    # Don't duplicate street numbers for now (needs testing).
-    if response and !/\s|^\d$/.test response
-      response = "#{response} #{response}"
     {challenge, response}
 
   save: ->

src/Posting/QR.coffee

@@ -10,8 +10,13 @@ QR =
     return if g.VIEW is 'archive'
 
     $.globalEval 'document.documentElement.dataset.jsEnabled = true;'
-    noscript = Conf['Force Noscript Captcha'] or !doc.dataset.jsEnabled
+    version = if Conf['Force Noscript Captcha'] or !doc.dataset.jsEnabled
-    @captcha = Captcha[if noscript then 'noscript' else 'v2']
+      'noscript'
+    else if Conf['Use Recaptcha v1']
+      'v1'
+    else
+      'v2'
+    @captcha = Captcha[version]
 
     $.on d, '4chanXInitFinished', @initReady
 
@@ -654,7 +659,12 @@ QR =
           QR.status()
 
     cb = (response) ->
-      extra.form.append 'g-recaptcha-response', response if response?
+      if response?
+        if response.challenge?
+          extra.form.append 'recaptcha_challenge_field', response.challenge
+          extra.form.append 'recaptcha_response_field', response.response
+        else
+          extra.form.append 'g-recaptcha-response', response
       QR.req = $.ajax "https://sys.4chan.org/#{g.BOARD}/post", options, extra
       QR.req.progress = '...'