Add basic BBcode translator

Signed-off-by: Skia <skia@libskia.so>

core/templates/core/to_markdown.jinja

@@ -1,12 +1,14 @@
 {% extends "core/base.jinja" %}
 
 {% block title %}
-{% trans %}Doku to Markdown{% endtrans %}
+{% trans %}To Markdown{% endtrans %}
 {% endblock %}
 
 {% block content %}
 <form action="" method="post" enctype="multipart/form-data">
     {% csrf_token %}
+    <input type="radio" name="syntax" value="doku" {% if request.POST['syntax'] != "bbcode" %}checked{% endif %} >Doku</input>
+    <input type="radio" name="syntax" value="bbcode" {% if request.POST['syntax'] == "bbcode" %}checked{% endif %} >BBCode</input>
     <textarea name="text" id="text" rows="30" cols="80">
         {{- text -}}
     </textarea>

core/templates/core/user_tools.jinja

@@ -108,7 +108,7 @@
 </ul>
 <h4>{% trans %}Other tools{% endtrans %}</h4>
 <ul>
-    <li><a href="{{ url('core:doku_to_markdown') }}">{% trans %}Convert dokuwiki syntax to Markdown{% endtrans %}</a></li>
+    <li><a href="{{ url('core:to_markdown') }}">{% trans %}Convert dokuwiki/BBcode syntax to Markdown{% endtrans %}</a></li>
     <li><a href="{{ url('trombi:user_tools') }}">{% trans %}Trombi tools{% endtrans %}</a></li>
 </ul>
 

core/urls.py

@@ -28,7 +28,7 @@ from core.views import *
 
 urlpatterns = [
     url(r'^$', index, name='index'),
-    url(r'^doku_to_markdown$', DokuToMarkdownView.as_view(), name='doku_to_markdown'),
+    url(r'^to_markdown$', ToMarkdownView.as_view(), name='to_markdown'),
     url(r'^notifications$', NotificationList.as_view(), name='notification_list'),
     url(r'^notification/(?P<notif_id>[0-9]+)$', notification, name='notification'),
 

core/utils.py

@@ -66,6 +66,7 @@ def exif_auto_rotate(image):
     return image
 
 def doku_to_markdown(text):
+    """This is a quite correct doku translator"""
     text = re.sub(r'([^:]|^)\/\/(.*?)\/\/', r'*\2*', text) # Italic (prevents protocol:// conflict)
     text = re.sub(r'<del>(.*?)<\/del>', r'~~\1~~', text, flags=re.DOTALL) # Strike (may be multiline)
     text = re.sub(r'<sup>(.*?)<\/sup>', r'^\1^', text) # Superscript (multiline not supported, because almost never used)
@@ -133,3 +134,44 @@ def doku_to_markdown(text):
 
     return "\n".join(new_text)
 
+def bbcode_to_markdown(text):
+    """This is a very basic BBcode translator"""
+    text = re.sub(r'\[b\](.*?)\[\/b\]', r'**\1**', text, flags=re.DOTALL) # Bold
+    text = re.sub(r'\[i\](.*?)\[\/i\]', r'*\1*', text, flags=re.DOTALL) # Italic
+    text = re.sub(r'\[u\](.*?)\[\/u\]', r'__\1__', text, flags=re.DOTALL) # Underline
+    text = re.sub(r'\[s\](.*?)\[\/s\]', r'~~\1~~', text, flags=re.DOTALL) # Strike (may be multiline)
+    text = re.sub(r'\[strike\](.*?)\[\/strike\]', r'~~\1~~', text, flags=re.DOTALL) # Strike 2
+
+    text = re.sub(r'article://', r'page://', text)
+    text = re.sub(r'dfile://', r'file://', text)
+
+    text = re.sub(r'\[url=(.*?)\](.*)\[\/url\]', r'[\2](\1)', text) # Links
+    text = re.sub(r'\[url\](.*)\[\/url\]', r'\1', text) # Links 2
+    text = re.sub(r'\[img\](.*)\[\/img\]', r'![\1](\1 "\1")', text) # Images
+
+    new_text = []
+    quote_level = 0
+    for line in text.splitlines(): # Tables and quotes
+        enter = re.finditer(r'\[quote(=(.+?))?\]', line)
+        quit = re.finditer(r'\[/quote\]', line)
+        if enter or quit: # Quote part
+            for quote in enter: # Enter quotes (support multiple at a time)
+                quote_level += 1
+                try:
+                    new_text.append("> " * quote_level + "##### " + quote.group(2))
+                except:
+                    new_text.append("> " * quote_level)
+                line = line.replace(quote.group(0), '')
+            final_quote_level = quote_level # Store quote_level to use at the end, since it will be modified during quit iteration
+            final_newline = False
+            for quote in quit: # Quit quotes (support multiple at a time)
+                line = line.replace(quote.group(0), '')
+                quote_level -= 1
+                final_newline = True
+            new_text.append("> " * final_quote_level + line) # Finally append the line
+            if final_newline: new_text.append("\n") # Add a new line to ensure the separation between the quote and the following text
+        else:
+            new_text.append(line)
+
+    return "\n".join(new_text)
+

core/views/site.py

@@ -37,7 +37,7 @@ from itertools import chain
 from haystack.query import SearchQuerySet
 
 from core.models import User, Notification
-from core.utils import doku_to_markdown
+from core.utils import doku_to_markdown, bbcode_to_markdown
 from club.models import Club
 
 def index(request, context=None):
@@ -98,17 +98,20 @@ def search_json(request):
             }
     return JsonResponse(result)
 
-class DokuToMarkdownView(TemplateView):
-    template_name = "core/doku_to_markdown.jinja"
+class ToMarkdownView(TemplateView):
+    template_name = "core/to_markdown.jinja"
 
     def post(self, request, *args, **kwargs):
         self.text = request.POST['text']
-        self.text_md = doku_to_markdown(self.text)
+        if request.POST['syntax'] == "doku":
+            self.text_md = doku_to_markdown(self.text)
+        else:
+            self.text_md = bbcode_to_markdown(self.text)
         context = self.get_context_data(**kwargs)
         return self.render_to_response(context)
 
     def get_context_data(self, **kwargs):
-        kwargs = super(DokuToMarkdownView, self).get_context_data(**kwargs)
+        kwargs = super(ToMarkdownView, self).get_context_data(**kwargs)
         try:
             kwargs['text'] = self.text
             kwargs['text_md'] = self.text_md