1 files changed, 52 insertions, 0 deletions
diff --git a/app/assets/javascripts/lib/url_utility.js.coffee b/app/assets/javascripts/lib/url_utility.js.coffee
new file mode 100644
index 00000000000..e8085e1c2e4
--- /dev/null
+++ b/app/assets/javascripts/lib/url_utility.js.coffee
@@ -0,0 +1,52 @@
+((w) ->
+
+  w.gl ?= {}
+  w.gl.utils ?= {}
+
+  # Returns an array containing the value(s) of the
+  # of the key passed as an argument
+  w.gl.utils.getParameterValues = (sParam) ->
+    sPageURL = decodeURIComponent(window.location.search.substring(1))
+    sURLVariables = sPageURL.split('&')
+    sParameterName = undefined
+    values = []
+    i = 0
+    while i < sURLVariables.length
+      sParameterName = sURLVariables[i].split('=')
+      if sParameterName[0] is sParam
+        values.push(sParameterName[1])
+      i++
+    values
+
+  # #
+  #  @param {Object} params - url keys and value to merge
+  #  @param {String} url
+  # #
+  w.gl.utils.mergeUrlParams = (params, url) ->
+    newUrl = decodeURIComponent(url)
+    for paramName, paramValue of params
+      pattern = new RegExp "\\b(#{paramName}=).*?(&|$)"
+      if not paramValue?
+        newUrl = newUrl.replace pattern, ''
+      else if url.search(pattern) isnt -1
+        newUrl = newUrl.replace pattern, "$1#{paramValue}$2"
+      else
+        newUrl = "#{newUrl}#{(if newUrl.indexOf('?') > 0 then '&' else '?')}#{paramName}=#{paramValue}"
+
+    # Remove a trailing ampersand
+    lastChar = newUrl[newUrl.length - 1]
+
+    if lastChar is '&'
+        newUrl = newUrl.slice 0, -1
+
+    newUrl
+
+  # removes parameter query string from url. returns the modified url
+  w.gl.utils.removeParamQueryString = (url, param) ->
+    url = decodeURIComponent(url)
+    urlVariables = url.split('&')
+    (
+      variables for variables in urlVariables when variables.indexOf(param) is -1
+    ).join('&')
+
+) window