wiki will try and get spanish version of page then fall back to english if it is not there

services/web/app/coffee/Features/Wiki/WikiController.coffee

@@ -2,29 +2,36 @@ request = require("request")
 settings = require("settings-sharelatex")
 logger = require("logger-sharelatex")
 ErrorController = require "../Errors/ErrorController"
+_ = require("underscore")
+
+other_lngs = ["es"]
 
 module.exports = WikiController = 
 	getPage: (req, res, next) ->
+		
 		page = req.url.replace(/^\/learn/, "").replace(/^\//, "")
 		if page == ""
 			page = "Main_Page"
 
 		logger.log page: page, "getting page from wiki"
+		if _.include(other_lngs, req.lng)
+			lngPage = "#{page}_#{req.lng}"
+		else
+			lngPage = page
 
 		WikiController._getPageContent "Contents", (error, contents) ->
 			return next(error) if error?
-			WikiController._getPageContent page, (error, page) ->
+			WikiController._getPageContent lngPage, (error, pageData) ->
 				return next(error) if error?
-				if page.title == "Main Page"
-					title = "Documentation"
+				if pageData.content?.length > 280
+					WikiController._renderPage(pageData, contents, res)
 				else
-					title = page.title
+					WikiController._getPageContent page, (error, pageData) ->
+						return next(error) if error?
+						WikiController._renderPage(pageData, contents, res)
+
+
 				
-				res.render "wiki/page", {
-					page: page
-					contents: contents
-					title: title
-				}
 
 	_getPageContent: (page, callback = (error, data = { content: "", title: "" }) ->) ->
 		request {
@@ -40,7 +47,21 @@ module.exports = WikiController =
 				data = JSON.parse(data)
 			catch err
 				logger.err err:err, data:data, "error parsing data from wiki"
-			callback null, {
+			result = 
 				content: data?.parse?.text?['*']
 				title: data?.parse?.title
+
+			callback null, result
+
+
+	_renderPage: (page, contents, res)->
+		if page.title == "Main Page"
+			title = "Documentation"
+		else
+			title = page.title
+			
+		res.render "wiki/page", {
+			page: page
+			contents: contents
+			title: title
 		}