langfilter, initial commit

This addon is based on the NSFW filter but collapses postings based on the
detected language instead of a list of words.

rel friendica#1778

langfilter/README.md

@@ -0,0 +1,40 @@
+Language Filter
+===============
+
+This addon allows users to define a list of languages in which postings shall
+be displayed. Postings in other languages will be collapsed, so the user can
+still read them if desired. When no language could be detected (this usually
+happens with short postings) the posting will be shown.
+
+It is based on the NSFW addon and filters the postings based on the language
+detected by Text_LanguageDetect package that is bundled with friendica.
+
+Please note, the language detection is not perfect. You should not trust it
+blindly and we will not be responsible for postings you don't see because
+they got wrongly hidden by this addon.
+
+Author
+======
+
+ * Tobias Diekershoff
+ 
+License
+=======
+ 
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.