From 6f25e16528f9f035c784055304b9f07c59f6782d Mon Sep 17 00:00:00 2001
From: Alexander Pickering <alexandermpickering@gmail.com>
Date: Sat, 21 May 2016 19:29:52 -0400
Subject: First pass at createing a databaseing system

---
 gamemode/server/database.lua | 106 ++++++++++++++++++++-----------------------
 1 file changed, 48 insertions(+), 58 deletions(-)

(limited to 'gamemode/server/database.lua')

diff --git a/gamemode/server/database.lua b/gamemode/server/database.lua
index 20efafc..9f8608d 100644
--- a/gamemode/server/database.lua
+++ b/gamemode/server/database.lua
@@ -2,84 +2,74 @@
 --[[
 Uses:
   GM.StorageMethod
-    Can be: "Text", "Static Map", "LZWCompressed"
-    If method is "Static Map", then GM.StoreageStaticMap must be a table of strings to string ID's.
-  GM.StorageBackend
-    Can be: "File"
+    Can be: "File:Text", "File:Compressed"
+  GM.Compressor
+    Can be: "GLON", "VON", "PON", "JSON"
   GM.StorageDebug
     Can be: true, false
     Enables extra debugging to find errors easily
 ]]
+--[[
+Provides:
+  loadTable(uniqueID)
+    loads a table with the given unique id, and returns it
+  storeTable(uniqueID, table)
+    stores the given table into the database, needs a uniqueid to find it again.
+]]
 
 print("Hello from database.lua!")
+GAMEMODE = GAMEMODE or {}
 
 function loadTable(uniqueIdentifier)
-
-  return nil
+  local rfile = file.Open("gmstranded/" .. uniqueIdentifier .. ".txt", "r", "DATA")
+  local text = rfile:Read(rfile:Size())
+  if(GAMEMODE.StorageMethod == "File:Compressed") then
+    text = util.Decompress(text)
+  end
+  return convertTextTable(text)
 end
 
 function storeTable(uniqueIdentifier, table)
-  if (GM.StorageDebug) then
-    print("Asked to store:")
-    PrintTable(table)
+  local storetext = convertTableText(table)
+  if(GAMEMODE.StorageMethod == "File:Compressed") then
+    storetext = util.Compress(storetext)
   end
-  if (GM.StorageDebug) then
-    for k,v in pairs(tbl) do
-      if (isfunction(v)) then
-        print("Database.lua error: tried to save a table that has a function in it!")
-        PrintTable(tbl)
-        print("At field:")
-        print(k)
-      end
-    end
+  if !(file.IsDir("gmstranded","DATA")) then
+    file.CreateDir("gmstranded")
   end
-
+  local tfile = file.Open("gmstranded/" .. uniqueIdentifier .. ".txt", "w","DATA")
+  tfile:Write(storetext)
+  tfile:Flush()
+  tfile:Close()
 end
 
---Remove symbols that might be used as part of the storage scheme
-local function encodeSymbolic(mstring)
-  local replacements = {
-    {"\\", "\\\\"},
-    {"{","\\{"},
-    {"}","\\}"},
-    {"(","\\("},
-    {")","\\)"},
-  }
-  local ostring = mstring
-  for k,v in pairs(replacements) do
-    ostring = string.Replace(ostring,v[1],v[2])
+function convertTableText(tbl)
+  if(GAMEMODE.Compressor == "GLON") then
+    return glon.encode(tbl)
+  elseif(GAMEMODE.Compressor == "VON") then
+    return von.serialize(tbl)
+  elseif(GAMEMODE.Compressor == "PON") then
+    return pon.encode(tbl)
+  elseif(GAMEMODE.Compressor == "JSON") then
+    return util.TableToJSON(tbl)
+  else
+    error("GM.Compressor is not set correctly! It is:" .. GM.Compressor .. " but should be one of:GLON,VON,PON,JSON")
   end
 end
 
-local function convertTableText(tbl)
-  local output = "t("
-  local function addtoout(k)
-    if (istable(k)) then
-      output = output .. convertTableText(k)
-    elseif (isstring(k)) then
-      output = output .. "s(" .. encodeSymbolic(k) .. ")"
-    elseif (isnumber(k)) then
-      output = output .. "n(" .. k .. ")"
-    elseif (isbool(k)) then
-      if (k) then output = output .. "b(true)"
-      else output = output .. "b(false)" end
-    elseif (isangle(k)) then
-      output = output .. "a(" .. k.p .. "," .. k.y .. "," .. k.r .. ")"
-    elseif (isvector(k)) then
-      output = output .. "v(" .. k.x .. "," .. k.y .. "," .. k.z .. ")"
-    else
-      assert(true,"Tried to store unknown value type:")
-      printi(k)
-    end
-  end
-  for k,v in pairs(tbl) do
-    addtoout(k)
-    output = output .. ":"
-    addtoout(v)
+function convertTextTable(text)
+  if(GAMEMODE.Compressor == "GLON") then
+    return glon.decode(text)
+  elseif(GAMEMODE.Compressor == "VON") then
+    return von.deserialize(text)
+  elseif(GAMEMODE.Compressor == "PON") then
+    return pon.decode(text)
+  elseif(GAMEMODE.Compressor == "JSON") then
+    return util.JSONToTable(text)
+  else
+    error("GM.Compressor is not set correctly! It is:" .. GM.Compressor .. " but should be one of:GLON,VON,PON,JSON")
   end
-  output = output .. ")"
 end
-
 --[[
 local function convertTableStatic(tbl)
   if (GM.StorageStaticMap == nil) then
-- 
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