From 8b63dc8fa35354cbdf189adfa8b71e72eda94d1b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Barrag=C3=A1n=20Merino?=
 <david.barragan@kaleidos.net>
Date: Sat, 29 Nov 2014 19:02:53 +0100
Subject: [PATCH] Bug tg-1668 #closed - Convert relative links to absolute
 links

---
 taiga/mdrender/extensions/wikilinks.py | 39 +++++++++++++++++++++++---
 tests/integration/test_mdrender.py     |  2 +-
 tests/unit/test_mdrender.py            | 18 ++++++------
 3 files changed, 46 insertions(+), 13 deletions(-)

diff --git a/taiga/mdrender/extensions/wikilinks.py b/taiga/mdrender/extensions/wikilinks.py
index b7f169b5..9eedbbcf 100644
--- a/taiga/mdrender/extensions/wikilinks.py
+++ b/taiga/mdrender/extensions/wikilinks.py
@@ -17,10 +17,13 @@
 
 from markdown import Extension
 from markdown.inlinepatterns import Pattern
+from markdown.treeprocessors import Treeprocessor
+
 from markdown.util import etree
 
 from taiga.front import resolve
 
+import re
 
 class WikiLinkExtension(Extension):
     def __init__(self, project, *args, **kwargs):
@@ -29,14 +32,18 @@ class WikiLinkExtension(Extension):
 
     def extendMarkdown(self, md, md_globals):
         WIKILINK_RE = r"\[\[([\w0-9_ -]+)(\|[\w0-9_ -]+)?\]\]"
-        wikilinkPattern = WikiLinksPattern(WIKILINK_RE, self.project)
-        wikilinkPattern.md = md
-        md.inlinePatterns.add("wikilink", wikilinkPattern, "<not_strong")
+        md.inlinePatterns.add("wikilinks",
+                              WikiLinksPattern(md, WIKILINK_RE, self.project),
+                              "<not_strong")
+        md.treeprocessors.add("relative_to_absolute_links",
+                              RelativeLinksTreeprocessor(md, self.project),
+                              "<prettify")
 
 
 class WikiLinksPattern(Pattern):
-    def __init__(self, pattern, project):
+    def __init__(self, md, pattern, project):
         self.project = project
+        self.md = md
         super().__init__(pattern)
 
     def handleMatch(self, m):
@@ -54,3 +61,27 @@ class WikiLinksPattern(Pattern):
         a.set("title", title)
         a.set("class", "reference wiki")
         return a
+
+
+SLUG_RE = re.compile(r"^[-a-zA-Z0-9_]+$")
+
+class RelativeLinksTreeprocessor(Treeprocessor):
+    def __init__(self, md, project):
+        self.project = project
+        super().__init__(md)
+
+    def run(self, root):
+        links = root.getiterator("a")
+        for a in links:
+            href = a.get("href", "")
+
+            if SLUG_RE.search(href):
+                # [wiki](wiki_page) -> <a href="FRONT_HOST/.../wiki/wiki_page" ...
+                url = resolve("wiki", self.project.slug, href)
+                a.set("href", url)
+                a.set("class", "reference wiki")
+
+            elif href and href[0] == "/":
+                # [some link](/some/link) -> <a href="FRONT_HOST/some/link" ...
+                url = "{}{}".format(resolve("home"), href[1:])
+                a.set("href", url)
diff --git a/tests/integration/test_mdrender.py b/tests/integration/test_mdrender.py
index 76a2d3e6..a5e076e8 100644
--- a/tests/integration/test_mdrender.py
+++ b/tests/integration/test_mdrender.py
@@ -33,7 +33,7 @@ dummy_project.slug = "test"
 def test_proccessor_valid_user_mention():
     factories.UserFactory(username="user1", full_name="test name")
     result = render(dummy_project, "**@user1**")
-    expected_result = "<p><strong><a class=\"mention\" href=\"/profile/user1\" title=\"test name\">@user1</a></strong></p>"
+    expected_result = "<p><strong><a class=\"mention\" href=\"http://localhost:9001/profile/user1\" title=\"test name\">@user1</a></strong></p>"
     assert result == expected_result
 
 
diff --git a/tests/unit/test_mdrender.py b/tests/unit/test_mdrender.py
index c1ec53d2..a31b749c 100644
--- a/tests/unit/test_mdrender.py
+++ b/tests/unit/test_mdrender.py
@@ -97,14 +97,6 @@ def test_render_wiki_strike():
     assert render(dummy_project, "~~test~~") == "<p><del>test</del></p>"
 
 
-def test_render_absolute_link():
-    assert render(dummy_project, "[test](/test)") == "<p><a href=\"/test\">test</a></p>"
-
-
-def test_render_relative_link():
-    assert render(dummy_project, "[test](test)") == "<p><a href=\"test\">test</a></p>"
-
-
 def test_render_wikilink():
     expected_result = "<p><a class=\"reference wiki\" href=\"http://localhost:9001/project/test/wiki/test\" title=\"test\">test</a></p>"
     assert render(dummy_project, "[[test]]") == expected_result
@@ -115,6 +107,16 @@ def test_render_wikilink_with_custom_title():
     assert render(dummy_project, "[[test|custom]]") == expected_result
 
 
+def test_render_wikilink_slug_to_wikipages():
+    expected_result = "<p><a class=\"reference wiki\" href=\"http://localhost:9001/project/test/wiki/wiki_page\" title=\"wiki page\">wiki</a></p>"
+    assert render(dummy_project, "[wiki](wiki_page \"wiki page\")") == expected_result
+
+
+def test_render_wikilink_relative_to_absolute():
+    expected_result = "<p><a href=\"http://localhost:9001/project/test/\">test project</a></p>"
+    assert render(dummy_project, "[test project](/project/test/)") == expected_result
+
+
 def test_render_reference_links():
     expected_result = "<p>An <a href=\"http://example.com/\" title=\"Title\">example</a> of reference link</p>"
     source = "An [example][id] of reference link\n  [id]: http://example.com/  \"Title\""