feat(-interface): Prefix dimension names with key position and attrib…

…utes names with M.

Closes #50

src/util/wdc-interface.coffee

@@ -16,14 +16,25 @@ submit = (url, dimension) ->
 
 getComponents = (structure) ->
   components = []
+  dimPos = 0
 
   for type in ['dimensions', 'attributes']
     for level in ['dataSet', 'series', 'observation']
       if structure[type]?[level]?
         components = components.concat structure[type][level].map (c) ->
+          if type is 'attributes'
+            prefix = "M"
+          else
+            dimPos += 1
+            if c.keyPosition?
+              keyPos = c.keyPosition + 1 # keyPosition is zero-based
+            else
+              keyPos = dimPos
+            # assumes there will always be less than 99 dimensions
+            prefix = if keyPos < 10 then "0#{keyPos}" else "keyPos"
+          c.name = "#{prefix} - #{c.name}"
           c.type = type
           c.level = level
-          c.name = "+#{c.name}" if type is 'attributes'
           c
 
   components
@@ -39,7 +50,7 @@ processResponse = (response) ->
   columnNames = for c in components
     switch
       when c.values[0]?.start? then [c.name, "#{c.name} start", "#{c.name} end"]
-      when c.values[0]?.id? then [c.name, "ID #{c.name}"]
+      when c.values[0]?.id? then [c.name, "#{c.name} ID"]
       else c.name
 
   columnTypes = for c in components

test/util/wdc-interface.test.coffee

@@ -13,7 +13,7 @@ describe 'Web Data Connector Interface', ->
     checkResult = () ->
       response = wdcInterface.response()
       response.fieldNames.should.be.an('array').with.lengthOf(42)
-      response.fieldNames.should.include('Currency')
+      response.fieldNames.should.include('02 - Currency')
       response.fieldTypes.should.be.an('array').with.lengthOf(42)
       response.fieldTypes.should.have.members(['string', 'datetime', 'float'])
       response.dataToReturn.should.be.an('array').with.lengthOf(4)