From e3f46ac7515f4558af5e953652ac550ece40521b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Schreiner?= <clemux@clemux.info>
Date: Tue, 1 Feb 2011 13:47:13 +0100
Subject: [PATCH] Adds support for previewing modifications on redmine's wiki
 pages.

Status: draft (needs further work to be really useful)
---
 weboob/backends/redmine/backend.py    | 11 +++++++++++
 weboob/backends/redmine/browser.py    |  8 ++++++++
 weboob/backends/redmine/pages/wiki.py |  6 ++++++
 weboob/capabilities/content.py        |  3 +++
 4 files changed, 28 insertions(+)

diff --git a/weboob/backends/redmine/backend.py b/weboob/backends/redmine/backend.py
index 57ce2e17..608e4c03 100644
--- a/weboob/backends/redmine/backend.py
+++ b/weboob/backends/redmine/backend.py
@@ -72,3 +72,14 @@ class RedmineBackend(BaseBackend, ICapContent):
 
         with self.browser:
             return self.browser.set_wiki_source(project, page, content.content, message)
+
+    def preview_content(self, content):
+        try:
+            _type, project, page = self.id2path(content.id)
+        except ValueError:
+            return
+
+        with self.browser:
+            return self.browser.get_wiki_preview(project, page, content.content)
+
+
diff --git a/weboob/backends/redmine/browser.py b/weboob/backends/redmine/browser.py
index 4a3e4328..c5b03d28 100644
--- a/weboob/backends/redmine/browser.py
+++ b/weboob/backends/redmine/browser.py
@@ -17,6 +17,7 @@
 
 
 from urlparse import urlsplit
+import urllib
 
 from weboob.tools.browser import BaseBrowser, BrowserIncorrectPassword
 
@@ -74,3 +75,10 @@ class RedmineBrowser(BaseBrowser):
     def set_wiki_source(self, project, page, data, message):
         self.location('%s/projects/%s/wiki/%s/edit' % (self.BASEPATH, project, page))
         self.page.set_source(data, message)
+
+    def get_wiki_preview(self, project, page, data):
+        url = '%s/projects/%s/wiki/%s/preview' % (self.BASEPATH, project, page)
+        params = {}
+        params['content[text]'] = data.encode('utf-8')
+        params['authenticity_token'] = "%s" % self.page.get_authenticity_token()
+        return self.readurl(url, urllib.urlencode(params))
diff --git a/weboob/backends/redmine/pages/wiki.py b/weboob/backends/redmine/pages/wiki.py
index db31b310..afc1c0b7 100644
--- a/weboob/backends/redmine/pages/wiki.py
+++ b/weboob/backends/redmine/pages/wiki.py
@@ -30,5 +30,11 @@ class WikiEditPage(BasePage):
             self.browser['content[comments]'] = message.encode('utf-8')
         self.browser.submit()
 
+    def get_authenticity_token(self):
+        wiki_form = select(self.document.getroot(), 'form#wiki_form', 1)
+        return wiki_form.xpath('div/input')[0].get('value')
+
+
+
 class WikiPage(BasePage):
     pass
diff --git a/weboob/capabilities/content.py b/weboob/capabilities/content.py
index 2e7d02d1..d7bb1c82 100644
--- a/weboob/capabilities/content.py
+++ b/weboob/capabilities/content.py
@@ -35,3 +35,6 @@ class ICapContent(IBaseCap):
 
     def push_content(self, content, message=None):
         raise NotImplementedError()
+    
+    def preview_content(self, content):
+        raise NotImplementedError()