Reapply "Nonfunctional virtual component support"

This reverts commit bc06ec457d.

halyde/core/datatools.lua

@@ -12,8 +12,8 @@ local conversionTables = {
   }
 }
 
-function table.find(table, item)
-  for k, v in pairs(table) do
+function table.find(tab, item)
+  for k, v in pairs(tab) do
     if v == item then
       return k
     end

halyde/lib/component.lua

@@ -1,15 +1,82 @@
-local componentlib
+local compLib
+local LLcomponent
 if table.copy then
-  componentlib = table.copy(component)
+  compLib = table.copy(component)
+  LLcomponent = table.copy(component)
 else
-  componentlib = {}
+  compLib = {}
+  LLcomponent = component
 end
 
-function componentlib.get(address)
+local ocelot = LLcomponent.proxy(LLcomponent.list("ocelot")())
+ocelot.log("loaded")
+
+_G.componentlib = {["additions"] = {}, ["removals"] = {}}
+compLib.virtual = {}
+
+function compLib.virtual.add(address, componentType, proxy)
   checkArg(1, address, "string")
-  assert(#address >= 3, "abbreviated address must be at least 3 characters long")
-  local components = component.list()
-  for currentAddress, name in pairs(components) do
+  checkArg(2, componentType, "string")
+  checkArg(3, proxy, "table")
+  componentlib.additions[address] = {["componentType"] = componentType, ["proxy"] = proxy}
+  if componentlib.removals[address] then
+    componentlib.removals[address] = nil
+  end
+end
+
+function compLib.virtual.remove(address)
+  checkArg(1, address, "string")
+  if componentlib.additions[address] then
+    componentlib.additions[address] = nil
+  else
+    table.insert(componentlib.removals, address)
+  end
+end
+
+function compLib.list(componentType)
+  checkArg(1, componentType, "string", "nil")
+  local componentList = table.copy(LLcomponent.list(componentType))
+  for address, dataTable in pairs(componentlib.additions) do
+    if dataTable.componentType == componentType or not componentType then
+      componentList[address] = dataTable.componentType
+    end
+  end
+  for _, address in pairs(componentlib.removals) do
+    componentList[address] = nil
+  end
+  local i, value
+  setmetatable(componentList, {__call = function(self)
+    i, value = next(self, i)
+    return i, value
+  end})
+  return componentList
+end
+
+function compLib.proxy(address)
+  if componentlib.additions[address] then
+    ocelot.log("vcomponent")
+    return componentlib.additions[address].proxy
+  else
+    return LLcomponent.proxy(address)
+  end
+end
+
+function compLib.invoke(address, funcName, ...)
+  ocelot.log("Invoking " .. funcName .. " from " .. address)
+  if componentlib.additions[address] then
+    ocelot.log("vcomponent")
+    return componentlib.additions[address].proxy[funcName](...)
+  else
+    return LLcomponent.invoke(address, funcName, ...)
+  end
+end
+
+function compLib.get(address)
+  checkArg(1, address, "string")
+  if #address < 3 then
+    return nil, "abbreviated address must be at least 3 characters long"
+  end
+  for currentAddress, name in compLib.list() do
     if currentAddress:find("^" .. address) then
       return(currentAddress)
     end
@@ -17,6 +84,6 @@ function componentlib.get(address)
   return nil, "full address not found"
 end
 
-componentlib.invoke = component.invoke
+compLib.invoke = component.invoke -- trust me, this is needed
 
-return componentlib
+return compLib